CN102506474B - Parallel ice cold accumulation refrigerating system and refrigerating method thereof - Google Patents
Parallel ice cold accumulation refrigerating system and refrigerating method thereof Download PDFInfo
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- CN102506474B CN102506474B CN 201110316288 CN201110316288A CN102506474B CN 102506474 B CN102506474 B CN 102506474B CN 201110316288 CN201110316288 CN 201110316288 CN 201110316288 A CN201110316288 A CN 201110316288A CN 102506474 B CN102506474 B CN 102506474B
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Abstract
The invention discloses a parallel ice cold accumulation refrigerating system and a refrigerating method thereof, and relates to the technical field of refrigerating air conditioners, wherein the parallel ice cold accumulation refrigerating system comprises a refrigerating unit set, a terminal device, an ice maker set, a heat exchange device and an ice accumulation device; an evaporator of the ice maker set and the ice accumulation device as well as a cold fluid channel in the heat-exchanging device are mutually connected in parallel; a hot fluid channel in the heat exchange device is connected with the terminal device through a pipeline in a loop mode; the pipeline is arranged between a condenser of the ice maker set and the evaporator of the refrigerating unit set in a loop mode; the pipeline is provided with a circulating pump and a control valve correspondingly; and cooling water of the condenser of the ice maker set is supplied by the refrigerating unit set through precooling to 2-20 DEC C. According to the invention, the problems that a conventional refrigerating unit set can not operate under the ice making working condition, the dual-working-condition refrigerating unit set under the ice making working condition is great in compression rate, high in cost and complex to control, and the like are overcome, the cost of a refrigerating system can be lowered, and the ice making efficiency and the operation stability are improved.
Description
Technical field
The present invention relates to refrigeration technology field, particularly the refrigeration and air-conditioning technical field.
Background technology
Conventional refrigeration system generally is comprised of refrigeration plant, cold source device, end equipment, auxiliary equipment, connecting line and control system etc.Most widely used refrigeration plant is the vapor compression refrigerator group, connects into loop by evaporimeter, compressor, condenser, throttling arrangement by copper pipe, charging refrigerant in the loop.During refrigeration unit work, cold-producing medium loops evaporation, compression, condensation, throttling Four processes in evaporimeter, compressor, condenser, throttling arrangement, heat is transferred to condenser from evaporimeter.
In typical refrigeration system, refrigeration unit is water-cooled cold water cooling unit---namely take water as the media discharge heat with the refrigeration unit of carrying cold; Cold source device is cooling tower; End equipment is fan coil or air-treatment unit.
The evaporimeter of refrigeration unit and end equipment form the chilled water closed circuit by pipeline and water pump.Chilled water is transported in evaporimeter by water pump, cooled dose absorbs heat and is cooled to 7 ℃ of left and right, be transported to end equipment by pipeline and absorb the heat of room air to reduce indoor air temperature, chilled water rises to 12 ℃ of left and right because absorbing room air heat temperature, then by in pipeline and water pump Returning evaporimeter.
The condenser of refrigeration unit and cooling tower form cooling water circulation loop by pipeline and water pump.Cooling water is transported in condenser by water pump, and the heat of absorption refrigeration agent and be heated to 37 ℃ of left and right is transported in cooling tower by pipeline, is cooled to 32 ℃ of left and right by cooling tower to the outdoor air heat radiation, then returns in condenser by pipeline and water pump.
Except the mode by cooling tower, also have the water-cooled cold water cooling unit by the mode discharges heat of underground pipe, underground water, surface water, these water-cooled cold water cooling units are also referred to as earth source heat pump unit, water source heat pump units.
Except take water as the media discharge heat, also have take the refrigeration unit of air as the media discharge heat, this refrigeration unit is called wind-cooled cold-water unit or net for air-source heat pump units.
Above refrigeration unit is in when refrigeration, and the leaving water temperature of chilled water is generally 7 ℃ of left and right, but also can be 18 ℃ of left and right; In any case, because of its temperature all far above 0 ℃, can not ice making, therefore be called conventional refrigeration unit.
The shortcoming of the conventional refrigeration system that forms with conventional refrigeration unit is:
1, for ensureing the cooling load of air-condition cooling of peak period, the capacity of refrigeration unit must satisfy the peak value refrigeration duty, causes installed capacity excessive, has increased the initial cost of equipment; And system's most of the time is all moved under sub-load, has also reduced operational efficiency and the utilization rate of equipment;
2, be not suitable for the part period and need the Air-conditioning Engineering of standby refrigerating capacity;
3, be not suitable for to provide low-temperature cold water maybe to need to adopt the Air-conditioning Engineering of cold air distribution;
4, be not suitable for the Air-conditioning Engineering that power capacity or supply of electric power are restricted;
5, the cooling load of air-condition peak overlaps with electrical network peak period, has aggravated the tensity of mains supply.
Existing ice cold-storage Refrigeration Technique, the phase-change characteristic of utilization ice and water, the period low at network load, that electricity price is cheap such as night, electricity consumption makes refrigerating device refrigeration, by the mode of ice making, cold is stored in ice take latent heat of phase change as main form; And the period high at network load, that electricity price is expensive such as daytime, the mode by ice-melt discharges the cold that stores in ice, to satisfy air conditioning or production technology with cold demand.
Existing ice regenerative cooling system is comprised of refrigeration plant, ice-storage equipment, refrigerating medium, refrigerating medium-chilled water heat exchanger, cold source device, end equipment, auxiliary equipment, connecting line and control system etc., can realize ice-reserving, ice-reserving cooling, the independent cooling of refrigeration plant, the independent cooling of ice storage unit, ice storage unit and five kinds of operational modes of refrigeration plant air conditioning simultaneously.
The refrigeration plant of existing ice regenerative cooling system is generally double duty chiller unit.
Identical with conventional refrigeration unit is, double duty chiller unit is also the vapor compression refrigerator group, comprises the air-cooled unit of the water chiller of the mode discharges heat by cooling tower, underground pipe, underground water, surface water and the mode discharges heat by air.
Different from conventional refrigeration unit is that the operating condition of double duty chiller unit has two kinds, i.e. cooling condition and ice making operating mode.When moving under cooling condition, the refrigerating medium outlet temperature of double duty chiller unit is the same with conventional refrigeration unit is 7 ℃ of left and right; And when moving under the ice making operating mode, the refrigerating medium outlet temperature of double duty chiller unit is-5 ℃～-15 ℃.
The shortcoming of double duty chiller unit is:
When 1, double duty chiller unit moved under the ice making operating mode, its refrigerating medium outlet temperature reduced by 12 ℃～22 ℃ than the chilled water leaving water temperature of conventional refrigeration unit, also 12 ℃～22 ℃ of the corresponding reductions of its evaporating temperature.So that no matter in which way discharges heat, in the situation that condensation temperature is identical, the compression ratio of the compressor of double duty chiller unit is large more than conventional refrigeration unit all.Under the mode with modal cooling tower discharges heat, the leaving water temperature of the cooling water of refrigeration unit is about 37 ℃, and corresponding condensation temperature is about 42 ℃; The evaporating temperature of double duty chiller unit under the ice making operating mode is-10 ℃～-20 ℃, and the compression ratio of its compressor is 4.5～6.6; And the evaporating temperature of conventional refrigeration unit is about 2 ℃, and the compression ratio of compressor is only 3.0 left and right.And compression ratio is larger, and Energy Efficiency Ratio is lower.Thereby in refrigeration, can reach the double duty chiller unit of high energy efficiency ratio under two kinds of operating modes of ice making, specification requirement is high, and technological requirement is high, and cost is expensive;
2, double duty chiller unit need to freeze, the alternate run of two kinds of operating modes of ice making, even need to freeze, the time operation of two kinds of operating modes of ice making, every kind of requirement that operating mode has different cooling temperatures and supplies cold makes refrigeration unit be difficult to reach and moves under all operating modes all to keep higher operational efficiency and operation stability.Simultaneously, the control system of double duty chiller unit is also very complicated, has further increased cost, and has increased fault rate.
When 3, double duty chiller unit moved under the ice making operating mode, evaporating temperature reduced by 12 ℃～22 ℃ than conventional refrigeration unit.And 1 ℃ of the every reduction of evaporating temperature, refrigerating capacity can reduce 2%～3%.Refrigerating capacity when therefore, double duty chiller unit moves under the ice making operating mode can reduce 24%～66%.
Therefore, adopt the ice regenerative cooling system of double duty chiller unit, system cost is high, when particularly existing conventional refrigeration system being iced the cold-storage transformation, needs to replace existing conventional refrigeration unit with expensive double duty chiller unit.And conventional refrigeration unit existing, that can work namely goes out of use, and causes serious waste.In addition, also there is the problem that system pipeline is complicated, system controls complexity.
Summary of the invention
The object of the invention is to design a kind of reduction refrigeration system cost, improves the ice regenerative cooling system of ice making efficient and operation stability.
The end equipment that the present invention includes refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, ice storage unit, the cold fluid pass in the evaporimeter of described ice making unit, ice storage unit and heat-exchanger rig connects by pipeline loop parallel with one another; Zone of heat liberation in described heat-exchanger rig is connected with the end equipment loop by second pipe; Also comprise the circulating pump and the control valve that are arranged on described each pipeline; It is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 3rd pipeline, on described the 3rd pipeline, corresponding circulating pump and control valve is set.
The present invention has overcome the problems such as conventional refrigeration unit can not be worked, double duty chiller unit ice making operating mode lower compression ratio is large, cost is high, control is complicated under the ice making operating mode, can reduce the refrigeration system cost, improves ice making efficient and operation stability.
The evaporimeter of the present invention's the first chilled water pump, refrigeration unit is connected the loop connection successively of the first pipeline with end equipment; The other second pipe that connects on the first pipeline between described end equipment and described the first chilled water pump, be connected in series successively the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described second pipe, the other end of described second pipe is other to be connected on the first pipeline between the evaporimeter of described end equipment and described refrigeration unit; The cold fluid pass of heat-exchanger rig, ice-melt coolant pump, ice storage unit and the valve of being connected connect by the 4th pipeline loop; Connect the 5th pipeline between the 4th pipeline that connects described ice storage unit two ends, evaporimeter, ice making coolant pump and second valve of serial connection ice making unit on described the 5th pipeline; With pipeline that the evaporator outlet of described refrigeration unit is connected on other the 3rd pipeline that connects, the other end of the 3rd pipeline is other to be connected on the pipeline that is connected with the import of described the first chilled water pump, condenser and the 3rd valve of serial connection ice making unit, arrange the 4th valve on the first pipeline between described the 3rd pipeline and described end equipment on described the 3rd pipeline.The technical program is the double-pump type working method.
The evaporimeter of the present invention's the first chilled water pump, refrigeration unit is connected the loop connection successively of the first pipeline with end equipment; The other second pipe that connects on the first pipeline between described end equipment and described the first chilled water pump, be connected in series successively the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described second pipe, the other end of described second pipe is other to be connected on the first pipeline between the evaporimeter of described end equipment and described refrigeration unit; Ice storage unit, ice-melt coolant pump, the second valve are connected cold fluid pass by the connection of the 4th pipeline loop successively with heat-exchanger rig; At other the 5th pipeline that connects of the port of export of ice-melt coolant pump, evaporimeter and first valve of serial connection ice making unit on described the 5th pipeline, the other end of described the 5th pipeline is connected on the cold fluid pass and the 4th pipeline between ice storage unit of described heat-exchanger rig; With pipeline that the evaporator outlet of described refrigeration unit is connected on other the 3rd pipeline that connects, the other end of the 3rd pipeline is other to be connected on the pipeline that is connected with the import of described the first chilled water pump, condenser and the 3rd valve of serial connection ice making unit, arrange the 4th valve on the first pipeline between described the 3rd pipeline and described end equipment on described the 3rd pipeline.The technical program is the single pump type working method.
The function of the double duty chiller unit of prior art is cut apart in the present invention, is carried out various combinations and is realized by conventional refrigeration unit and two groups of refrigeration unit of ice making unit.Under the ice making operating mode, carry out ice making by two groups of refrigeration unit associated working---the chilled water the supply system ice maker group that conventional refrigeration unit is produced is to make its cooling water, the refrigerating medium ice making that the ice making unit is produced take conventional refrigeration unit as cold source device; And the compression ratio of every group of refrigeration unit is all much smaller than existing double duty chiller unit.Under cooling condition, worked independently by conventional refrigeration unit and freeze.The present invention has reduced the cost of ice regenerative cooling system, particularly can utilize existing conventional refrigeration unit when existing conventional refrigeration system being iced the cold-storage transformation, avoids waste.Simultaneously, also simplify pipeline and the control of ice regenerative cooling system, improved the efficient of ice regenerative cooling system.
Described ice-melt coolant pump of the present invention can adopt the variable-flow coolant pump of the modes such as frequency conversion, regulates the refrigerating medium flow of the cold fluid pass that enters heat-exchanger rig, controls the supply water temperature of the zone of heat liberation of heat-exchanger rig, satisfies the demand that refrigeration duty changes.
The present invention also can connect the 6th pipeline between the 4th pipeline at the cold fluid pass two ends that connect described heat-exchanger rig, serial connection the 5th valve, be connected in series the 6th valve on the 4th pipeline between the end of described the 6th pipeline and the cold fluid pass of described heat-exchanger rig on described the 6th pipeline.Can enter the refrigerating medium flow of the cold fluid pass of heat-exchanger rig by this 5th, the 6th valve regulated, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, the demand that changes to satisfy refrigeration duty.
The present invention also can connect the 6th pipeline between the 4th pipeline at the cold fluid pass two ends that connect described heat-exchanger rig, mouthful be connected in series a three-way valve crossing of described the 6th pipeline and the 4th pipeline.Can regulate the refrigerating medium flow of the cold fluid pass that enters heat-exchanger rig by three-way valve, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, the demand that changes to satisfy refrigeration duty.
In addition, the present invention also can connect the 6th pipeline between the 4th pipeline that connects described ice storage unit two ends, serial connection the 5th valve on described the 6th pipeline.Enter the refrigerant temperature of the cold fluid pass of heat-exchanger rig by the 5th valve regulated, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, satisfy the demand that refrigeration duty changes.
Another purpose of the present invention is to propose the method that adopts above ice regenerative cooling system to freeze:
The cooling water of the condenser of ice making unit is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit.
The invention has the beneficial effects as follows:
One, improve ice making efficient, reduce the cost of ice making unit
Ice making unit of the present invention adopt conventional refrigeration unit the chilled water of 2～20 ℃ of confession as its cooling water, its corresponding condensation temperature is 12～30 ℃, condensation temperature (42 ℃) than existing double duty chiller unit descends 12～30 ℃, make the corresponding decline of condensing pressure of ice making unit, the compression ratio of ice making unit is compared existing double duty chiller unit and has been descended 25.96%～55.10% as a result, thereby the Energy Efficiency Ratio that has greatly improved the ice making unit is operational efficiency; Simultaneously, also greatly reduce specification requirement and the technological requirement of ice making unit, make ice machine form this and greatly reduce.
Two, improve the operation stability of ice making unit, simplify the control of ice making unit
Ice making unit of the present invention is only with a kind of operating mode work of ice making, and it is constant that its evaporating temperature and delivery temperature all keep, and need not frequent adjusting, greatly improved the operation stability of ice making unit.Simultaneously, the control of ice making unit is simplified greatly, has further reduced cost and the fault rate of ice making unit.
Three, improve the refrigerating capacity of ice making unit, reduce the installed capacity of ice making unit in the ice regenerative cooling system
As everyone knows, 1 ℃ of the every reduction of the condensation temperature of refrigeration unit, its refrigerating capacity can improve 1.5%.The condensation temperature of ice making unit of the present invention is 12～30 ℃, descends 12～30 ℃ than the condensation temperature (42 ℃) of existing double duty chiller unit, and the refrigerating capacity of ice making unit can improve 18%～45%; Accordingly, also significantly reduced the installed capacity of ice making unit in the ice regenerative cooling system.
Four, reduce the cost of ice regenerative cooling system
Refrigeration unit of the present invention, no matter ice making unit or conventional refrigeration unit, cost all is significantly less than existing double duty chiller unit.In the situation that total refrigeration duty is identical, the totle drilling cost of two groups of refrigeration unit of the present invention still obviously reduces than the cost of double duty chiller unit, thereby has reduced the cost of ice regenerative cooling system.
Five, the composition of ice regenerative cooling system and operation are more flexible
Ice regenerative cooling system of the present invention is comprised of ice making unit and conventional refrigeration unit, and refrigeration duty is by ice making unit and conventional refrigeration unit shared.The present invention can be freely, neatly assignment system ice maker group and conventional refrigeration unit share separately refrigeration duty ratio to adapt to the refrigeration duty of various different situations, greatly improved flexibility that the ice regenerative cooling system forms and the flexibility of operation.
Six, simplify pipeline and the control of ice regenerative cooling system
Ice regenerative cooling system of the present invention is divided into ice making, refrigeration two parts, and conventional refrigeration unit is only with a kind of operating mode work of freezing, and the ice making unit is only with a kind of operating mode work of ice making, thereby simplifies the pipeline of system and the control of system.
Seven, reduce the cost of existing conventional refrigeration system being iced the cold-storage transformation
The refrigerating capacity of the conventional refrigeration unit of conventional refrigeration system is based on and satisfies a day peak load configuration, and the refrigeration duty at night more than day peak load low, therefore the refrigerating capacity at conventional refrigeration unit night is much larger than the refrigeration duty at night.When existing conventional refrigeration system being iced the cold-storage transformation, only need the very little ice making unit of allocating power, can implement technical scheme of the present invention, can satisfy the refrigeration duty of ice making, take full advantage of again conventional refrigeration unit refrigerating capacity more than needed at night; Need not existing, conventional refrigeration unit that can work are discarded and acquired more expensive double duty chiller unit, greatly reduced the cost of existing conventional refrigeration system being iced the cold-storage transformation.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 the second structural representation of the present invention;
Fig. 3 the third structural representation of the present invention;
Fig. 4 the third structural representation of the present invention;
Fig. 5 is a kind of structural representation of the present invention;
Fig. 6 the second structural representation of the present invention;
Fig. 7 the third structural representation of the present invention;
Fig. 8 the third structural representation of the present invention.
The specific embodiment
Fig. 1 to 4 is the concrete structure schematic diagram of double-pump type working method of the present invention.
Fig. 5 to 8 is the concrete structure schematic diagram of single pump type working method of the present invention.
One, embodiment one:
As shown in Figure 1, the present invention evaporimeter 1-2 of being provided with refrigeration unit 1, end equipment 3, the first chilled water pump 2, the first chilled water pumps 2, refrigeration unit 1 is connected with end equipment and is connected by the first pipeline 4 loop successively.
Install endways the other second pipe 5 that connects on the first pipeline 4 between the 3 and first chilled water pump 2, the zone of heat liberation 7-1 of serial connection the second chilled water pump 6, heat-exchanger rig 7 on second pipe 5, the other end of second pipe 5 is other to be connected on the first pipeline 4 between the evaporimeter 1-2 of end equipment 3 and refrigeration unit 1.
The cold fluid pass 7-2 of heat-exchanger rig 7, (variable-flow formula) ice-melt coolant pump 8, ice storage unit 9 and the valve 10 of being connected connect by the 4th pipeline 11 loops.Connect the 5th pipeline 12 between the 4th pipeline 11 that connects ice storage unit 9 two ends, evaporimeter 13-1, ice making coolant pump 14 and second valve 15 of serial connection ice making unit 13 on the 5th pipeline 12.
Exporting other the 3rd pipeline 16 that connects on the pipeline that is connected with refrigeration unit evaporimeter 1-2, the other end of the 3rd pipeline 16 is other to be connected on the pipeline that is connected with the import of the first chilled water pump 2, on other the first pipeline 4 that is connected between end equipment 3 and refrigeration unit 1 of the other end of the condenser 13-2 that is connected in series ice making unit 13 on the 3rd pipeline 16 and the 3rd valve 18, the three pipelines 16.
The 4th valve 17 of also connecting on the first pipeline 4 between the 3rd pipeline 16 and end equipment 3.
By above connection, form:
1, chilled water circuit:
By the chilled water tube connector with evaporimeter 1-2, the end equipment 3(of the first chilled water pump 2, the second chilled water pump 6, refrigeration unit 1 as: fan coil), condenser 13-2, the zone of heat liberation 7-1 of heat-exchanger rig 7 of ice making unit 13, the 3rd valve 18, the 4th valve 17 connect into loop.
2, refrigerating medium loop: evaporimeter 13-1, ice storage unit 9, the cold fluid pass 7-2 of heat-exchanger rig 7, the second valve 15, first valve 10 of ice making coolant pump 14, ice-melt coolant pump 8, ice making unit 13 connected into a loop by the refrigerating medium tube connector.
The present invention can realize plurality of operating modes:
1, ice-storage mode:
The first valve 10, the 4th valve 17 are closed; The second chilled water pump 6, ice-melt coolant pump 8 are out of service.
The second valve 15, the 3rd valve 18 are opened; The first chilled water pump 2,14 operations of ice making coolant pump; Refrigeration unit 1, the 13 start operations of ice making unit.
Chilled water circuit: chilled water flows into the condenser 13-2 of ice making unit after the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1 absorbs cold, after released cold quantity, then return to the first chilled water pump 2 through the 3rd valve 18, enters next circulation.
Refrigerating medium loop: refrigerating medium flows into ice storage unit 9 through the second valve 15 after the evaporimeter 13-1 of ice making coolant pump 14 input ice making units 13 absorbs cold, ice making after released cold quantity, then return to ice making coolant pump 14, enter next circulation.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
2, ice-reserving while cooling pattern:
The first valve 10 is closed; The second chilled water pump 6, ice-melt coolant pump 8 are out of service.
The second valve 15, the 3rd valve 18, the 4th valve 17 are opened; The first chilled water pump 2,14 operations of ice making coolant pump; Refrigeration unit 1, the 13 start operations of ice making unit.
Chilled water circuit: chilled water is after the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1 absorbs cold, and the condenser 13-2 that a part flows into ice making unit 13 after released cold quantity, then returns to the first chilled water pump 2 through the 3rd valve 18, enters next circulation; Another part flows into end equipment 3 coolings, after released cold quantity, then returns to the first chilled water pump 2 by the 4th valve 17, enters next circulation.
Refrigerating medium loop: refrigerating medium flows into ice storage unit 9 through the second valve 15 after the evaporimeter 13-1 of ice making coolant pump 14 input ice making units 13 absorbs cold, ice making after released cold quantity, then return to ice making coolant pump 14, enter next circulation.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
3, the independent cooling pattern of conventional unit:
The first valve 10, the second valve 15, the 3rd valve 18 are closed; The second chilled water pump 6, ice making coolant pump 14, ice-melt coolant pump 8 are out of service; Ice making unit 13 is shut down.
The 4th valve 17 is opened; The first chilled water pump 2 operations; Refrigeration unit 1 start operation.
Chilled water after absorbing cold, flows into end equipment 3 coolings through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, after released cold quantity, then returns to the first chilled water pump 2 by the 4th valve 17, enters next circulation.
4, the independent cooling pattern of ice storage unit:
The second valve 15, the 3rd valve 18 are closed; The first chilled water pump 2, ice making coolant pump 14 are out of service; Ice making unit 13, refrigeration unit 1 are shut down.
The first valve 10, the 4th valve 17 are opened; The second chilled water pump 6,8 operations of ice-melt coolant pump.
Refrigerating medium loop: refrigerating medium after released cold quantity, then flows into ice storage unit 9 through the cold fluid pass 7-2 of ice-melt coolant pump 8 input heat-exchanger rigs 7, after absorbing cold, returns to ice-melt coolant pump 8 through the first valve 10, enters next circulation.
But ice-melt coolant pump 8 regulating frequencies of frequency conversion, adjusting enters the refrigerating medium flow of the cold fluid pass 7-2 of heat-exchanger rig 7, to regulate the temperature of the refrigerating medium in heat-exchanger rig 7.
Chilled water circuit: chilled water after absorbing cold, flows into end equipment 3 coolings through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, after released cold quantity, then returns to the second chilled water pump 6 through the 4th valve 17, enters next circulation.
5, ice storage unit and conventional unit air conditioning pattern:
The second valve 15, the 3rd valve 18 are closed; Ice making coolant pump 14 is out of service; Ice making unit 13 is shut down.
The first valve 10, the 4th valve 17 are opened; The first chilled water pump 2, the second chilled water pump 6,8 operations of ice-melt coolant pump; Refrigeration unit 1 start operation.
Refrigerating medium loop: refrigerating medium after released cold quantity, then flows into ice storage unit 9 through the cold fluid pass 7-2 of ice-melt coolant pump 8 input heat-exchanger rigs 7, after absorbing cold, through the first valve 10, returns to ice-melt coolant pump 8, enters next circulation.
Chilled water circuit: the part of chilled water after absorbing cold, flows into end equipment 3 coolings through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, after released cold quantity, then through the 4th valve 17, returns to the second chilled water pump 6, enters next circulation; Another part of chilled water after absorbing cold, flows into end equipment 3 coolings through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, after released cold quantity, then through the 4th valve 17, returns to the first chilled water pump 2, enters next circulation.
Two, embodiment two:
As shown in Figure 2, other with embodiment one, but ice-melt coolant pump 8 be common coolant pump, and is another, connects the 6th pipeline 20 between the 4th pipeline 11 at the cold fluid pass 7-2 two ends that connect heat-exchanger rig 7, is connected in series the 5th valve 21 on pipeline 20.Be connected in series the 6th valve 22 on the 4th pipeline 11 between the cold fluid pass 7-2 two ends of pipeline 20 and heat-exchanger rig 7.
Regulate the refrigerating medium flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by the 5th valve 21, the 6th valve 22, with the chilled water temperature in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Three, embodiment three:
As shown in Figure 3, other connected mode just is merged into a triple valve 21 with the 5th valve 21 in example two and the 6th valve 22 with example two, this triple valve 21 is connected to the mouth that crosses of the 4th pipeline 11 and the 6th pipeline 20.
Four, embodiment four:
As shown in Figure 4, other with embodiment one, but ice-melt coolant pump 8 be common coolant pump, and is another, connecting pipe 20 between the 4th pipeline 11 that connects ice storage unit 9 two ends is connected in series the 5th valve 19 on pipeline 20.
Regulate the refrigerant temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by the 5th valve 19, with the chilled water temperature in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Five, embodiment five:
As shown in Figure 5, the evaporimeter 1-2 that the present invention includes refrigeration unit 1, end equipment 3, the first chilled water pump 2, the first chilled water pumps 2, refrigeration unit 1 is connected with end equipment and is connected by the first pipeline 4 loop successively.
Install endways the other second pipe 5 that connects on the first pipeline 4 between the 3 and first chilled water pump 2, be connected in series successively the zone of heat liberation 7-1 of the second chilled water pump 6 and heat-exchanger rig 7 on second pipe 5, the other end of second pipe 5 is other to be connected on the first pipeline 4 between the evaporimeter 1-2 of end equipment 3 and refrigeration unit 1.
The cold fluid pass 7-2 of heat-exchanger rig 7, ice storage unit 9, (frequency conversion type) ice-melt coolant pump 8 and the valve 14 of being connected connect by the 4th mutual loop of pipeline 10.
Other the 5th pipeline 11 that connects on the cold fluid pass 7-2 that connects heat-exchanger rig 7 and the 4th pipeline 10 between ice storage unit 9, on other the 4th pipeline 10 that is connected between ice-melt coolant pump 8 and the second valve 14 of the other end of the evaporimeter 13-1 that is connected in series ice making unit 13 on the 5th pipeline 11 and the first valve 12, the five pipelines 11.
Exporting other the 3rd pipeline 15 that connects on the pipeline that is connected with the evaporimeter 1-2 of refrigeration unit 1, the other end of the 3rd pipeline 15 is other to be connected on the pipeline that is connected with the import of the first chilled water pump 2, condenser 13-2 and the 3rd valve 16 of serial connection ice making unit 13 on the 3rd pipeline 15.
On the first pipeline 4 between the 3rd pipeline 15 and end equipment 3, the 4th valve 17 is set.
By above connection, form:
1, chilled water circuit:
By the chilled water tube connector with evaporimeter 1-2, the end equipment 3(of the first chilled water pump 2, the second chilled water pump 6, refrigeration unit 1 as: fan coil), the condenser 13-2 of ice making unit 13, zone of heat liberation 7-1, the 3rd valve 16 and the 4th valve 17 of heat-exchanger rig 7 connect into a loop.
2, refrigerating medium loop:
By the refrigerating medium tube connector, evaporimeter 13-1, ice storage unit 9, the cold fluid pass 7-2 of heat-exchanger rig 7, the first valve 12, second valve 14 of coolant pump 8, ice making unit 13 connected into a loop.
The present invention can realize plurality of operating modes:
1, ice-storage mode:
The second valve 14, the 4th valve 17 are closed; The second chilled water pump 6 is out of service.
The first valve 12, the 3rd valve 16 are opened; The first chilled water pump 2, coolant pump 8 operations; Refrigeration unit 1, the 13 start operations of ice making unit.
Chilled water circuit: chilled water through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, absorb cold after, after flowing into the condenser 13-2 released cold quantity of ice making unit 13, then return to the first chilled water pump 2 through the 3rd valve 16, enter next circulation.
Refrigerating medium loop: refrigerating medium flows into the evaporimeter 13-1 of ice making unit 13 through the first valve 12 after coolant pump 8 pressurizations, after absorbing cold, flow into ice storage unit 9, ice making after released cold quantity, then return to coolant pump 8, enter next circulation.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
2, ice-reserving while cooling pattern:
The second valve 14 is closed; The second chilled water pump 6 is out of service.
The first valve 12, the 3rd valve 16, the 4th valve 17 are opened; The first chilled water pump 2, coolant pump 8 operations; Refrigeration unit 1, the 13 start operations of ice making unit.
Chilled water circuit: chilled water is through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, and after absorbing cold, the condenser 13-2 that a part flows into ice making unit 13 after released cold quantity, then returns to the first chilled water pump 2 through the 3rd valve 16, enters next circulation; Another part flows into end equipment 3 coolings, after released cold quantity, then returns to the first chilled water pump 2 through the 4th valve 17, enters next circulation.
Refrigerating medium loop: refrigerating medium through the first valve 12, flows into the evaporimeter 13-1 of ice making unit 13 after coolant pump 8 pressurizations, after absorbing cold, flow into ice storage unit 9, ice making after released cold quantity, then return to coolant pump 8, enter next circulation.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
3, the independent cooling pattern of conventional unit:
The first valve 12, the second valve 14, the 3rd valve 16 are closed; The second chilled water pump 6, coolant pump 8 are out of service; Ice making unit 13 is shut down.
The 4th valve 17 is opened; The first chilled water pump 2 operations; Refrigeration unit 1 start operation.
Chilled water circuit: chilled water after absorbing cold, flows into end equipment 3 coolings through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, after released cold quantity, then returns to the first chilled water pump 2 through the 4th valve 17, enters next circulation.
4, the independent cooling pattern of ice storage unit:
The first valve 12, the 3rd valve 16 are closed; The first chilled water pump 2 is out of service; Ice making unit 13, refrigeration unit 1 are shut down.
The second valve 14, the 4th valve 17 are opened; The second chilled water pump 6, coolant pump 8 operations.
Chilled water circuit: chilled water after absorbing cold, flows into end equipment 3 coolings through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, after released cold quantity, then returns to the second chilled water pump 6 through the 4th valve 17, enters next circulation.
Refrigerating medium loop: refrigerating medium through the second valve 14, flows into the cold fluid pass 7-2 of heat-exchanger rig 7 after coolant pump 8 pressurizations, after released cold quantity, flow into ice storage unit 9, after absorbing cold, returns to coolant pump 8, enters next circulation.
But coolant pump 8 regulating frequencies of frequency conversion, adjusting enters the refrigerating medium flow of the cold fluid pass 7-2 of heat-exchanger rig 7, with the temperature of the chilled water in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
5, ice storage unit and conventional unit air conditioning pattern:
The first valve 12, the 3rd valve 16 are closed; Coolant pump 8 is out of service; Ice making unit 13 is shut down.
The second valve 14, the 4th valve 17 are opened; The first chilled water pump 2, the second chilled water pump 6 operations; Refrigeration unit 1 start operation.
Chilled water circuit: the part of chilled water after absorbing cold, flows into end equipment 3 coolings through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, after released cold quantity, then returns to the second chilled water pump 6 through the 4th valve 17, enters next circulation; Another part of chilled water after absorbing cold, flows into end equipment 3 coolings through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, after released cold quantity, then through the 4th valve 17, returns to the first chilled water pump 2, enters next circulation.
Refrigerating medium loop: refrigerating medium through the second valve 14, flows into the cold fluid pass 7-2 of heat-exchanger rig 7 after coolant pump 8 pressurizations, after released cold quantity, flow into ice storage unit 9, after absorbing cold, returns to coolant pump 8, enters next circulation.
But coolant pump 8 regulating frequencies of frequency conversion, adjusting enters the refrigerating medium flow of the cold fluid pass 7-2 of heat-exchanger rig 7, with the temperature of the chilled water in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Six, embodiment six:
As shown in Figure 6, other with embodiment five.Coolant pump 8 in this example is common coolant pump.
Separately, other the 6th pipeline 19 that connects on the pipeline between the cold fluid pass 7-2 end of the second valve 14 on the 4th pipeline 10 and heat-exchanger rig 7, the other end of the 6th pipeline 19 is other to be connected on the cold fluid pass 7-2 and the 4th pipeline 10 between ice storage unit 9 of heat-exchanger rig 7, serial connection the 5th valve 20, be connected in series the 6th valve 21 on the 4th pipeline 10 between the cold fluid pass 7-2 of the 6th pipeline 19 and heat-exchanger rig 7 on the 6th pipeline 19.
Regulate the refrigerating medium flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by the 5th valve 20 and the 6th valve 21, with the chilled water temperature in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Seven, embodiment seven:
As shown in Figure 7, other with embodiment five.Coolant pump 8 in this example is common coolant pump.
Separately, other the 6th pipeline 19 that connects on the pipeline between the cold fluid pass 7-1 end of the second valve 14 on the 4th pipeline 10 and heat-exchanger rig 7, the other end of the 6th pipeline 19 is other to be connected on the cold fluid pass 7-2 and the 4th pipeline 10 between ice storage unit 9 of heat-exchanger rig 7, is connected in series a three-way valve 20 at the 6th pipeline 19 with the mouth that crosses of the 4th pipeline 10.
Regulate the refrigerant temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by three-way valve 20, with the chilled water temperature in the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Eight, embodiment eight:
As shown in Figure 8, other with embodiment five.Coolant pump 8 in this example is common coolant pump.
Separately, connect the 6th pipeline 19 between the 4th pipeline 10 that connects ice storage unit 9 two ends, serial connection the 5th valve 20 on the 6th pipeline 19.
Claims (11)
1. parallel ice regenerative cooling system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, ice storage unit, the cold fluid pass in the evaporimeter of described ice making unit, ice storage unit and heat-exchanger rig connects by pipeline loop parallel with one another; Zone of heat liberation in described heat-exchanger rig is connected with the end equipment loop by second pipe; Also comprise the circulating pump and the control valve that are arranged on described each pipeline; It is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 3rd pipeline, on described the 3rd pipeline, corresponding circulating pump and control valve is set, and described ice making unit is an ice making unit with a kind of operating mode work of ice making.
2. parallel ice regenerative cooling system according to claim 1 is characterized in that: the evaporimeter of the first chilled water pump, refrigeration unit be connected with end equipment the first pipeline successively loop connect; The other second pipe that connects on the first pipeline between described end equipment and described the first chilled water pump, be connected in series successively the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described second pipe, the other end of described second pipe is other to be connected on the first pipeline between the evaporimeter of described end equipment and described refrigeration unit; The cold fluid pass of heat-exchanger rig, ice-melt coolant pump, ice storage unit and the valve of being connected connect by the 4th pipeline loop; Connect the 5th pipeline between the 4th pipeline that connects described ice storage unit two ends, evaporimeter, ice making coolant pump and second valve of serial connection ice making unit on described the 5th pipeline; With pipeline that the evaporator outlet of described refrigeration unit is connected on other the 3rd pipeline that connects, the other end of the 3rd pipeline is other to be connected on the pipeline that is connected with the import of described the first chilled water pump, condenser and the 3rd valve of serial connection ice making unit, arrange the 4th valve on the first pipeline between described the 3rd pipeline and described end equipment on described the 3rd pipeline.
3. parallel ice regenerative cooling system according to claim 2, it is characterized in that connecting the 6th pipeline between the 4th pipeline at the cold fluid pass two ends that connect described heat-exchanger rig, serial connection the 5th valve, be connected in series the 6th valve on the 4th pipeline between the end of described the 6th pipeline and the cold fluid pass of described heat-exchanger rig on described the 6th pipeline.
4. parallel ice regenerative cooling system according to claim 2, it is characterized in that connecting the 6th pipeline between the 4th pipeline at the cold fluid pass two ends that connect described heat-exchanger rig, mouthful be connected in series a three-way valve crossing of described the 6th pipeline and the 4th pipeline.
5. parallel ice regenerative cooling system according to claim 2, is characterized in that connecting the 6th pipeline between the 4th pipeline that connects described ice storage unit two ends, serial connection the 5th valve on described the 6th pipeline.
6. parallel ice regenerative cooling system according to claim 1 is characterized in that: the evaporimeter of the first chilled water pump, refrigeration unit be connected with end equipment the first pipeline successively loop connect; The other second pipe that connects on the first pipeline between described end equipment and described the first chilled water pump, be connected in series successively the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described second pipe, the other end of described second pipe is other to be connected on the first pipeline between the evaporimeter of described end equipment and described refrigeration unit; Ice storage unit, ice-melt coolant pump, the second valve are connected cold fluid pass by the connection of the 4th pipeline loop successively with heat-exchanger rig; At other the 5th pipeline that connects of the port of export of ice-melt coolant pump, evaporimeter and first valve of serial connection ice making unit on described the 5th pipeline, the other end of described the 5th pipeline is connected on the cold fluid pass and the 4th pipeline between ice storage unit of described heat-exchanger rig; With pipeline that the evaporator outlet of described refrigeration unit is connected on other the 3rd pipeline that connects, the other end of the 3rd pipeline is other to be connected on the pipeline that is connected with the import of described the first chilled water pump, condenser and the 3rd valve of serial connection ice making unit, arrange the 4th valve on the first pipeline between described the 3rd pipeline and described end equipment on described the 3rd pipeline.
7. parallel ice regenerative cooling system according to claim 6, it is characterized in that other the 6th pipeline that connects on the pipeline between the cold fluid pass end of described the second valve and heat-exchanger rig, serial connection the 5th valve on described the 6th pipeline, the other end of described the 6th pipeline is other to be connected on the cold fluid pass and the 4th pipeline between described ice storage unit of described heat-exchanger rig, is connected in series the 6th valve on the 4th pipeline between the cold fluid pass of described the 6th pipeline and described heat-exchanger rig.
8. parallel ice regenerative cooling system according to claim 6, it is characterized in that other the 6th pipeline that connects on the pipeline between the cold fluid pass end of described the second valve and heat-exchanger rig, the other end of described the 6th pipeline is other to be connected on the cold fluid pass and the 4th pipeline between described ice storage unit of described heat-exchanger rig, is connected in series a three-way valve at described the 6th pipeline with the mouth that crosses of described the 4th pipeline.
9. parallel ice regenerative cooling system according to claim 6, is characterized in that connecting the 6th pipeline between the 4th pipeline that connects described ice storage unit two ends, serial connection the 5th valve on described the 6th pipeline.
10. according to claim 2 or 6 described parallel ice regenerative cooling systems, is characterized in that described ice-melt coolant pump is variable-flow formula coolant pump.
11. a method of using parallel ice regenerative cooling system as claimed in claim 1 to freeze is characterized in that: supply with after the cooling water of the condenser of ice making unit is chilled to 2～20 ℃ in advance by refrigeration unit.
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| CN 201110316288 CN102506474B (en) | 2011-10-18 | 2011-10-18 | Parallel ice cold accumulation refrigerating system and refrigerating method thereof |
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| CN 201110316288 CN102506474B (en) | 2011-10-18 | 2011-10-18 | Parallel ice cold accumulation refrigerating system and refrigerating method thereof |
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| CN105276733A (en) * | 2015-11-09 | 2016-01-27 | 上海建筑设计研究院有限公司 | Data computer room cooling system and cooling method thereof |
| CN107202377A (en) * | 2017-05-19 | 2017-09-26 | 海南佩尔优科技有限公司 | Energy-storage air conditioner system and its control method |
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| JP2000356429A (en) * | 1999-06-11 | 2000-12-26 | Mitsubishi Electric Corp | External melting cold dissipating combined ice heat storage system |
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