CN103776120A - Underground heat balance and heat exchange device for ground source heat pump air-conditioning system and operation mode - Google Patents
Underground heat balance and heat exchange device for ground source heat pump air-conditioning system and operation mode Download PDFInfo
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- CN103776120A CN103776120A CN201410073868.4A CN201410073868A CN103776120A CN 103776120 A CN103776120 A CN 103776120A CN 201410073868 A CN201410073868 A CN 201410073868A CN 103776120 A CN103776120 A CN 103776120A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B10/40—Geothermal heat-pumps
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Abstract
An underground heat balance and heat exchange device for a ground source heat pump air-conditioning system comprises a control cabinet, a cooling tower, an air-conditioning refrigerant water collector, an air-conditioning refrigerant water distributor, a plurality of water pumps, a plurality of ground source heat pump units, a ground source water distributor, a plurality of ground source well groups, a plurality of switching valves, a ground source water collector, a plurality of temperature sensors and a plurality of flow sensors. According to an operation mode of the ground source heat pump air-conditioning system, a complete underground temperature monitoring system is built by the aid of the control cabinet and a series of flow sensors and temperature sensors, and operating ground source well groups can be reasonably selected according to temperature and flow changes of the ground source well groups. The control cabinet can timely adjust operation strategies according to underground temperature changes, the heat absorption and heat release capacity of a ground source is maximally used on the premise that underground temperature is not unbalanced, and the working efficiency of the ground source heat pump air-conditioning system is improved and energy consumption is reduced without underground heat pollution.
Description
Technical field
The present invention relates to field of air conditioning, especially geothermal heat pump air-conditioning system field, specifically a kind of underground heat balance and heat-exchanger rig of geothermal heat pump air-conditioning system.
The present invention also comprises a kind of method of operation of geothermal heat pump air-conditioning system.
Background technology
Ground source heat pump technology is one of three large technical measures of national Architectural Equipment energy conservation criteria, basic functional principle: summer fever pump assembly drains into underground or cooling tower by used heat in the time producing chilled water (meeting terminal temperature difference needs), source pump will be given up cold type to underground in the time producing hot water (meeting terminal temperature difference needs) in winter.But China's various places weather conditions difference, " cold " amount of building demand in summer there are differences with " heat " amount of demand in winter, if " cold " amount of In Middle And Lower Reaches of Changjiang River building demand in summer is to measure 2 times winter " heat " of demand, will cause subsurface temperature unbalance if all used heat (cold) is drained into Underground Long-term, gently affect operation of air conditioner effect, heavy cause underground thermal pollution.Designer in the time of design this type system often by cooling tower (and heat reclamation device is set, the used heat that heat reclamation device is collected is mainly used in domestic hot-water, this measures less for air-conditioning waste heat amount and adjusting function is poor, apparatus of the present invention are not considered its impact) and the measure head it off of source well group use, this measure tentatively possesses the condition of head it off from the hardware of air-conditioning equipment, this measure does not solve the how problem of reasonably combined use of cooling tower and ground source well group, as excessive in cooling tower use amount (otherwise source, ground well group use amount is too small) do not reach the object of source, design ground well group, source, employing ground well group water cooling source pump efficiency will be much larger than the efficiency of cooling tower water, and cooling tower needs power consumption, as too small in cooling tower use amount (otherwise source, ground well group use amount is excessive) can cause subsurface temperature unbalance.
Summary of the invention
The object of the invention is for the unbalanced present situation of work allocation between geothermal heat pump air-conditioning system underground heat and cooling tower, provide a kind of and can monitor in real time variations in temperature real-time monitoring under beneath temperature base area, optimum but underground heat balance and heat-exchanger rig and the method for operation of the geothermal heat pump air-conditioning system of tower use accounting of H/C of descend evenly.
Technical scheme of the present invention:
A kind of underground heat balance and heat-exchanger rig of geothermal heat pump air-conditioning system, it comprises switch board, cooling tower, air conditioner coolant water water collector, air conditioner coolant water separator, multiple water pump, multiple earth source heat pump unit, soil source water knockout drum, source, multiple ground well group, multiple switch valve, soil source water collector, several temperature sensors and several flow sensors, wherein
The input of air conditioner coolant water water collector is connected with user side, and the output of air conditioner coolant water water collector connects a main pipeline, and this main pipeline separates multiple branch roads and connects with the input of multiple earth source heat pump units respectively;
The output of first earth source heat pump unit is connected with the input of cooling tower by a pipeline, and the output of cooling tower is connected with the input of this earth source heat pump unit by pipeline, forms the first loop;
The output of all earth source heat pump units and become a pipeline after be connected with the input of soil source water knockout drum, multiple outputs of soil source water knockout drum connect with the input of source, ground well group respectively, the output of source, each ground well group connects with the input of soil source water collector by a switch valve respectively, the output of soil source water collector separates multiple branch roads and connects with the input of earth source heat pump unit respectively, forms second servo loop;
The output of described all earth source heat pump units and become a pipeline after be connected with the input of air conditioner coolant water separator, the output of air conditioner coolant water separator is connected with user side, form tertiary circuit.
At the output of cooling tower, cooling tower flow sensor is set, at the input of soil source water knockout drum, soil source water knockout drum flow sensor is set, at the output of soil source water collector, soil source water collector flow sensor is set;
At the input of cooling tower, cooling tower input temp sensor is set, at the output of cooling tower, cooling tower output temperature sensor is set, at the outdoor outdoor temperature sensor that arranges, at the output of soil source water collector, soil source water collector temperature sensor is set, at the input of soil source water knockout drum, soil source water knockout drum temperature sensor is set, at the output of source, multiple ground well group, source, ground well group leaving water temperature sensor is set respectively, in the down-hole of source, multiple ground well group, two soil temperature sensors is set respectively;
The signal output part of described all flow sensors and temperature sensor is connected with the signal input part of switch board respectively, and described all switch valves connect with the signal output part of switch board respectively.
Described switch board is connected with machine room group control system by RS485 interface.
On described switch board, be provided with operation touch-screen.
Source, described ground well group is U-shaped tubular construction.
An air-conditioning system method of operation for geothermal heat pump air-conditioning system, switch board detects pipeline flow by flow sensor, surveys the actual temperature of source, various places well group soil by soil temperature sensor, by temperature T outside outdoor sensor sensing chamber
outward, and flow and temperature information are fed back to machine room group control system; Machine room group control system building database is recorded flow and temperature information; Machine room group control system is according to actual temperature, the outdoor temperature T of the original temperature of pipeline flow, source, various places well soil, source, various places well group soil
outward, work at present pattern and current season do not have the maximized land used source heat absorption and release ability that makes under unbalance prerequisite to control air-conditioning system operation as operation strategy take subsurface temperature.
Described operation strategy comprises the selection course of an earth source heat pump unit:
When summer,
1) set temperature T
change,
2) temperature T outside outdoor temperature sensor sensing chamber
outward, machine room team control unit judges T
outwardwhether be greater than T
change,
3) while being greater than, machine room team control unit starting the first earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator;
While being not more than, machine room team control unit starting the second earth source heat pump unit, the 3rd earth source heat pump unit and, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator;
When winter, machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
Described operation strategy comprises a T
changeautomatic makeover process:
1) soil moisture that geothermal heat pump air-conditioning system carries out source, ground well group by all soil temperature sensors before Second Year starts summer is patrolled and examined, and set a value reference values X ℃ according to different soils region situation feelings, from machine room group control system, obtain ground source well group heat exhaust, the data value of source well group row cold, the average supply backwater temperature difference of previous year ground source well group in summer
If 2-1) all the measured value of soil temperature sensor is not more than its soil original temperature X ℃, the T in the current year
changeincrease by 1 ℃ compared with previous year;
If 2-2) all the measured value of soil temperature sensors be greater than its soil original temperature X ℃, the current year cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) average supply backwater temperature difference of * X/ previous year ground source well group in summer;
Be greater than its soil original temperature X ℃ if 2-3) exceed the measured value of half soil temperature sensor, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*50%/previous year ground source well group in summer in the current year;
If 2-4) measured value of the following soil temperature sensor of half is greater than its soil original temperature X ℃, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*25%/previous year ground source well group in summer in the current year;
3) current year cooling tower heat exhaust setting value=previous year cooling tower heat exhaust cooling tower in setting value+current year heat exhaust value added.
Described operation strategy comprises the selection course of source, ground well group:
When summer,
The soil original temperature in summer of source, i ground well group is designated as T
summer i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not more than T
summer isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation,
When winter,
The soil original temperature in winter of source, i ground well group is designated as T
winter i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not less than T
winter isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation.
Described operation strategy comprises the handoff procedure of source, ground well group:
When summer,
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is greater than standard T
summer i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously.
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all greater than standard T
summer i2 ℃ time, machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator,
When winter,
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is lower than standard T
winter i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously.
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all less than standard T
winter i2 ℃ time, machine room team control machine group selection T
1iand T
2isource, the ground well group continuation of mean value minimum is used and closes other source, ground well group.
Described operation strategy comprises the automatic testing process of the fault of a soil sensor:
1) switch board calculates the leaving water temperature of source, various places well group and the mean difference M of the soil moisture by following formula:
Wherein, T
1iand T
2ibe two soil temperature sensors of source, i ground well group, T
ibe the leaving water temperature sensor of source, i ground well group,
2) if | T
1i+ M-T
i| and | T
2i+ M-T
i| in have a value to be greater than systematic error setting value, switch board sends alarm signal and judges that exceeding the affiliated soil temperature sensor of value is fault sensor; Alarm signal continues for some time and does not deal with, this fault sensor of system automatic shield.
Described operation strategy comprises an automatic testing process of circuit failure:
According to the discharge of source, different engineering-environment design discrepancy ground well group, relatively soil source water knockout drum flow sensor and soil source water collector flow sensor numerical value, when difference is higher than the more than 2% of design discharge, judgement ground source well group pipeline breaking, and send pipeline breaking alarm signal by machine room team control unit;
Set the temperature difference of source, the ground well group water of coming in and going out according to different engineering-environments, relatively soil source water knockout drum temperature sensor and soil source water collector temperature sensor numerical value, when difference is higher than setting the more than 50% of the temperature difference, source, judgement ground well group pipeline obstruction, and send pipeline obstruction alarm signal by machine room team control unit.
Machine room group control system building database, stores the heat exhaust of source, ground per hour well group or arranges cold, and the temperature data of source, various places well group.
Beneficial effect of the present invention:
The present invention has set up a set of complete subsurface temperature monitoring system by switch board and a series of flow sensor and temperature sensor, can be according to source, the ground well group of the temperature of source, various places well group and the operation of changes in flow rate choose reasonable.Switch board also can be according to the timely adjust operation strategy of the variation of subsurface temperature, there is no the maximized ability that makes land used source heat absorption and release under unbalance prerequisite at subsurface temperature, guaranteeing not produce under the prerequisite that underground heat pollutes, improve the operating efficiency of geothermal heat pump air-conditioning system and reduced the consumption of the energy.
Accompanying drawing explanation
Fig. 1 is the underground heat balance of geothermal heat pump air-conditioning system of the present invention and the schematic diagram of heat-exchanger rig (not comprising switch board).
Fig. 2 is the schematic diagram of switch board of the present invention.
Fig. 3 is the temperature data storehouse display interface of machine room group control system of the present invention.
In figure, indicate explanation:
1-air conditioner coolant water water collector, 2-water pump, 3-the first earth source heat pump unit, 4-the second earth source heat pump unit, 5-the 3rd earth source heat pump unit, 6-cooling tower, 7-soil source water knockout drum, source, 8-ground well group, 9-switch valve, 10-soil source water collector, 11-air conditioner coolant water separator, 12-switch board, 13-machine room group control system, 14-operates touch-screen, 15-soil;
L1-cooling tower output flow sensor, L2-soil source water knockout drum flow sensor, L3-soil source water collector flow sensor;
T1-cooling tower input temp temperature sensor, T2-cooling tower output temperature sensor, T3-outdoor temperature sensor, T4-soil source water collector temperature sensor, T5-soil source water knockout drum temperature sensor, source, five ground of T6～T10-well group output temperature sensor, source, five ground of T11～T20-well group downhole temperature sensor.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As depicted in figs. 1 and 2, a kind of underground heat balance and heat-exchanger rig of geothermal heat pump air-conditioning system, whole system comprises switch board 12, cooling tower 6, air conditioner coolant water water collector 1, air conditioner coolant water separator 11, three water pumps 2, three earth source heat pump units 3～5, soil source water knockout drum 7, five source, ground well groups 8, five switch valves 9,10,20 temperature sensor T1～T20 of soil source water collector and three flow sensor L1～L3, wherein
The input of air conditioner coolant water water collector 1 is connected with user side, the output of air conditioner coolant water water collector 1 connects a main pipeline, this main pipeline separates three branch roads and connects with the input of three earth source heat pump units 3～5 respectively, is provided with a forward water pump 2 on main pipeline;
The output of the first earth source heat pump unit 3 is connected with the input of cooling tower 6 by a pipeline, is furnished with a forward water pump 2 on this pipeline, and the output of cooling tower 6 is connected with the input of the first earth source heat pump unit 3 by pipeline, forms the first loop;
The output of three earth source heat pump units 3～5 and become a pipeline after be connected with the input of soil source water knockout drum 7, on this pipeline, be provided with a forward water pump 2, five outputs of soil source water knockout drum 7 connect with the input of source, ground well group 8 respectively, the output of source, each ground well group 8 connects with the input of soil source water collector 10 by a switch valve 9 respectively, the output of soil source water collector 10 separates three branch roads and connects with the input of earth source heat pump unit 3～5 respectively, forms second servo loop;
The output of three earth source heat pump units 3～5 and become a pipeline after be connected with the input of air conditioner coolant water separator 11, the output of air conditioner coolant water separator 11 is connected with user side, form tertiary circuit.
At the output of cooling tower 6, cooling tower flow sensor L1 is set, at the input of soil source water knockout drum 7, soil source water knockout drum flow sensor L2 is set, at the output of soil source water collector 10, soil source water collector flow sensor L3 is set;
At the input of cooling tower 6, cooling tower input temp sensor T1 is set, at the output of cooling tower 6, cooling tower output temperature sensor T2 is set, at the outdoor outdoor temperature sensor T3 that arranges, at the output of soil source water collector 10, soil source water collector temperature sensor T4 is set, at the input of soil source water knockout drum 7, soil source water knockout drum temperature sensor T5 is set, output at source, five ground well group 8 arranges respectively a temperature sensor T6～T10, the temperature of two temperature sensor T11～T20 supervision soil 15 is set respectively in the down-hole soil 15 of source, five ground well group 8,
All flow sensor L1～L3 are connected with the signal input part of switch board 12 respectively with the signal output part of temperature sensor T1～T20, and five switch valves 9 connect with the signal output part of switch board 12 respectively.The control and operation of apparatus of the present invention is realized by the PLC controller in switch board 12.
On switch board 12, be provided with operation touch-screen 14, operation touch-screen 14 is for data input, regular job and demonstration.
Source, ground well group 8 is U-shaped tubular construction.
Control and the program basic functional principle (starting summer to finish to summer) of operation:
Earth source heat pump unit selection course is:
1) set temperature T
change.
2) temperature T outside outdoor temperature sensor sensing chamber
outward, machine room team control unit judges T
outwardwhether be greater than T
change.
3) while being greater than, machine room team control unit starting the first earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
While being not more than, machine room team control unit starting the second earth source heat pump unit, the 3rd earth source heat pump unit, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
In one embodiment, T
changebe 28 ℃, collect T
outwardbe 30 ℃, machine room team control unit starting the first earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
After operation a period of time, T detected
outwardreduce to 28 ℃, machine room team control unit starting the second earth source heat pump unit, the 3rd earth source heat pump unit, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
T
changeautomatic makeover process be:
1) soil moisture that geothermal heat pump air-conditioning system carries out source, ground well group by all soil temperature sensors before Second Year starts summer is patrolled and examined, and set a value reference values X ℃ according to different soils region situation feelings, from machine room group control system, obtain ground source well group heat exhaust, the data value of source well group row cold, the average supply backwater temperature difference of previous year ground source well group in summer.
If 2-1) all the measured value of soil temperature sensor is not more than its soil original temperature X ℃, the T in the current year
changeincrease by 1 ℃ compared with previous year;
If 2-2) all the measured value of soil temperature sensors be greater than its soil original temperature X ℃, the current year cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) average supply backwater temperature difference of * X/ previous year ground source well group in summer;
Be greater than its soil original temperature X ℃ if 2-3) exceed the measured value of half soil temperature sensor, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*50%/previous year ground source well group in summer in the current year;
If 2-4) measured value of the following soil temperature sensor of half is greater than its soil original temperature X ℃, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*25%/previous year ground source well group in summer in the current year.
3) current year cooling tower heat exhaust setting value=previous year cooling tower heat exhaust cooling tower in setting value+current year heat exhaust value added.
In one embodiment, according to concrete engineering-environment, X is set as to 19.0 ℃, the measured value of all soil temperature sensors is respectively 18.5 ℃, 18.6 ℃, 18.8 ℃, 18.5 ℃, 18.6 ℃, 18.9 ℃, 18.8 ℃, 18.7 ℃, 18.4 ℃, 18.5 ℃, source, the ground well group heat exhaust of previous year is 81600KW H, ground source well group row cold is 146880KWH, known according to above-mentioned analysis, the current year T
changeincrease by 1 ℃ compared with previous year.
Source, ground well group selection course is:
The soil original temperature in summer of source, i ground well group is designated as T
summer i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not more than T
summer isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation.
Source, ground well group handoff procedure is:
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is greater than standard T
summer i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously.
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all greater than standard T
summer i2 ℃ time, machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
Control and the program basic functional principle (starting winter to finish to winter) of operation
Earth source heat pump unit selection course is:
Machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
Source, ground well group selection course is:
The soil original temperature in winter of source, i ground well group is designated as T
winter i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not less than T
winter isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation.
Source, ground well group handoff procedure is:
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is lower than standard T
winter i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously.
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all less than standard T
winter i2 ℃ time, machine room team control machine group selection T
1iand T
2isource, the ground well group continuation of mean value minimum is used and closes other source, ground well group.
The automatic testing process of fault in running:
The automatic testing process of the fault of soil sensor is:
1) switch board calculates the leaving water temperature of source, various places well group and the mean difference M of the soil moisture by following formula:
Wherein, T
1iand T
2ibe two soil temperature sensors of source, i ground well group, T
iit is the leaving water temperature sensor of source, i ground well group.
2) if | T
1i+ M-T
i| and | T
2i+ M-T
i| in have a value to be greater than systematic error setting value, switch board sends alarm signal and judges that exceeding the affiliated soil temperature sensor of value is fault sensor; Alarm signal continues for some time and does not deal with, this fault sensor of system automatic shield.
In one embodiment, systematic error setting value is 2, has source, five ground well group, totally ten soil temperature sensors.The leaving water temperature of source, ground well group is respectively: 20.1,20.0,20.2,20.5,20.3, the temperature of soil temperature sensor is respectively 18.5 ℃, 18.6 ℃, 19.1 ℃, 19.2 ℃, 18.6 ℃, 18.9 ℃, 18.8 ℃, 19.0 ℃, 18.4 ℃, 8.5 ℃, calculating M according to above formula is 2.46, judge that temperature sensor has fault, investigate in time and mask.
The backup of soil sensor:
There is inspection and maintenance difficulty in soil temperature sensor, can whether the soil moisture normally directly has influence on air-conditioning system normally be moved, for asking source, reliable every group of ground well group that two soil temperature sensors (backup) are set, i.e. T11～T10 gets its mean value in above program operation process.
The automatic testing process of circuit failure is:
According to the discharge of source, different engineering-environment design discrepancy ground well group, relatively soil source water knockout drum flow sensor and soil source water collector flow sensor numerical value, when difference is higher than the more than 2% of design discharge, judgement ground source well group pipeline breaking, and send pipeline breaking alarm signal by machine room team control unit;
In one embodiment, the discharge of source, discrepancy ground well group is designed to 300.0m^3/h, soil source water knockout drum flow sensor numerical value is 302.6m^3/h, soil source water collector flow sensor numerical value is 310.2m^3/h, learn according to calculating, described difference, higher than the more than 2% of design discharge, judges source, ground well group pipeline obstruction, and sends pipeline breaking alarm signal by machine room team control unit.
Set the temperature difference of source, the ground well group water of coming in and going out according to different engineering-environments, relatively soil source water knockout drum temperature sensor and soil source water collector temperature sensor numerical value, when difference is higher than setting the more than 50% of the temperature difference, source, judgement ground well group pipeline obstruction, and send pipeline obstruction alarm signal by machine room team control unit.
In one embodiment, the temperature difference of source, discrepancy ground well group water is set as 5 ℃, the numerical value of soil source water knockout drum temperature sensor is 18 ℃, the numerical value of soil source water collector temperature sensor is 27 ℃, learn according to calculating, this difference, higher than the more than 50% of design temperature, judges source, ground well group pipeline obstruction, and sends pipeline obstruction alarm signal by machine room team control unit.
The foundation of database:
Machine room group control system building database, stores the heat exhaust of source, ground per hour well group or arranges cold, and the temperature data of source, various places well group, as Fig. 3.
Claims (9)
1. underground heat balance and the heat-exchanger rig of a geothermal heat pump air-conditioning system, it comprises switch board, cooling tower, air conditioner coolant water water collector, air conditioner coolant water separator, multiple water pump, multiple earth source heat pump unit, soil source water knockout drum, source, multiple ground well group, multiple switch valve, soil source water collector, several temperature sensors and several flow sensors, wherein:
The input of air conditioner coolant water water collector is connected with user side, and the output of air conditioner coolant water water collector connects a main pipeline, and this main pipeline separates multiple branch roads and connects with the input of multiple earth source heat pump units respectively;
The output of first earth source heat pump unit is connected with the input of cooling tower by a pipeline, and the output of cooling tower is connected with the input of this earth source heat pump unit by pipeline, forms the first loop;
The output of all earth source heat pump units and become a pipeline after be connected with the input of soil source water knockout drum, multiple outputs of soil source water knockout drum connect with the input of source, ground well group respectively, the output of source, each ground well group connects with the input of soil source water collector by a switch valve respectively, the output of soil source water collector separates multiple branch roads and connects with the input of earth source heat pump unit respectively, forms second servo loop;
The output of described all earth source heat pump units and become a pipeline after be connected with the input of air conditioner coolant water separator, the output of air conditioner coolant water separator is connected with user side, form tertiary circuit,
It is characterized in that, at the output of cooling tower, cooling tower flow sensor is set, at the input of soil source water knockout drum, soil source water knockout drum flow sensor is set, at the output of soil source water collector, soil source water collector flow sensor is set;
At the input of cooling tower, cooling tower input temp sensor is set, at the output of cooling tower, cooling tower output temperature sensor is set, at the outdoor outdoor temperature sensor that arranges, at the output of soil source water collector, soil source water collector temperature sensor is set, at the input of soil source water knockout drum, soil source water knockout drum temperature sensor is set, at the output of source, multiple ground well group, source, ground well group leaving water temperature sensor is set respectively, in the down-hole of source, multiple ground well group, two soil temperature sensors is set respectively;
The signal output part of described all flow sensors and temperature sensor is connected with the signal input part of switch board respectively, and described all switch valves connect with the signal output part of switch board respectively.
Described switch board is connected with machine room group control system by RS485 interface.
2. the air-conditioning system method of operation based on geothermal heat pump air-conditioning system claimed in claim 1, it is characterized in that switch board detects pipeline flow by flow sensor, survey the actual temperature of source, various places well group soil by soil temperature sensor, by temperature T outside outdoor sensor sensing chamber
outward, and flow and temperature information are fed back to machine room group control system; Machine room group control system building database is recorded flow and temperature information; Machine room group control system is according to actual temperature, the outdoor temperature T of the original temperature of pipeline flow, source, various places well soil, source, various places well group soil
outward, work at present pattern and current season do not have the maximized land used source heat absorption and release ability that makes under unbalance prerequisite to control air-conditioning system operation as operation strategy take subsurface temperature.
3. a kind of air-conditioning system method of operation according to claim 2, is characterized in that described operation strategy comprises the selection course of an earth source heat pump unit:
When summer,
1) set temperature T
change, this temperature can arrange according to engineering concrete condition, and general initial value is: 28 ℃ of (T
change);
2) temperature T outside outdoor temperature sensor sensing chamber
outward, machine room team control unit judges T
outwardwhether be greater than T
change,
3) while being greater than, machine room team control unit starting the first earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator;
While being not more than, machine room team control unit starting the second earth source heat pump unit, the 3rd earth source heat pump unit and, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator;
When winter, machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator.
4. a kind of air-conditioning system method of operation according to claim 3, is characterized in that described operation strategy comprises a T
changeautomatic makeover process:
1) soil moisture that geothermal heat pump air-conditioning system carries out source, ground well group by all soil temperature sensors before Second Year starts summer is patrolled and examined, and set a value reference values X ℃ according to different soils region situation feelings, from machine room group control system, obtain ground source well group heat exhaust, the data value of source well group row cold, the average supply backwater temperature difference of previous year ground source well group in summer
If 2-1) all the measured value of soil temperature sensor is not more than its soil original temperature X ℃, the T in the current year
changeincrease by 1 ℃ compared with previous year;
If 2-2) all the measured value of soil temperature sensors be greater than its soil original temperature X ℃, the current year cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) average supply backwater temperature difference of * X/ previous year ground source well group in summer;
Be greater than its soil original temperature X ℃ if 2-3) exceed the measured value of half soil temperature sensor, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*50%/previous year ground source well group in summer in the current year;
If 2-4) measured value of the following soil temperature sensor of half is greater than its soil original temperature X ℃, the average supply backwater temperature difference of cooling tower heat exhaust value added=(source, well group heat exhaust-ground, source well group row cold) * X*25%/previous year ground source well group in summer in the current year;
3) current year cooling tower heat exhaust setting value=previous year cooling tower heat exhaust cooling tower in setting value+current year heat exhaust value added.
5. a kind of air-conditioning system method of operation according to claim 2, is characterized in that described operation strategy comprises the selection course of source, ground well group:
When summer,
The soil original temperature in summer of source, i ground well group is designated as T
summer i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not more than T
summer isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation,
When winter,
The soil original temperature in winter of source, i ground well group is designated as T
winter i, the actual soil moisture that two soil temperature sensors of source, i ground well group detect this source, ground well group is designated as respectively T
1iand T
2i, select T
1iand T
2imean value is not less than T
winter isource, ground well group stand-by; The group selection of machine room team control machine treats that land used source well group comes into operation.
6. a kind of air-conditioning system method of operation according to claim 2, is characterized in that described operation strategy comprises the handoff procedure of source, ground well group:
When summer,
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is greater than standard T
summer i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously,
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all greater than standard T
summer i2 ℃ time, machine room team control unit starting the first earth source heat pump unit, the second earth source heat pump unit, the 3rd earth source heat pump unit and cooling tower, air conditioner coolant water water collector, soil source water knockout drum, source well group, soil source water collector, air conditioner coolant water separator,
When winter,
1) machine room team control unit is monitored the actual soil moisture of source, the ground well group coming into operation, and occurs T
1iand T
2imean value is lower than standard T
winter i2 ℃ time, source, the ground well group that machine room team control unit closing temperature exceeds standard selects other to treat that land used source well group comes into operation simultaneously,
2) when the temperature of source, all ground well group all exceeds standard, the T of each source, ground well group
1iand T
2imean value is all less than standard T
winter i2 ℃ time, machine room team control machine group selection T
1iand T
2isource, the ground well group continuation of mean value minimum is used and closes other source, ground well group.
7. a kind of air-conditioning system method of operation according to claim 2, is characterized in that described operation strategy comprises the automatic testing process of the fault of a soil sensor:
1) switch board calculates the leaving water temperature of source, various places well group and the mean difference M of the soil moisture by following formula:
Wherein, T
1iand T
2ibe two soil temperature sensors of source, i ground well group, T
ibe the leaving water temperature sensor of source, i ground well group,
2) if | T
1i+ M-T
i| and | T
2i+ M-T
i| in have a value to be greater than systematic error setting value, switch board sends alarm signal and judges that exceeding the affiliated soil temperature sensor of value is fault sensor; Alarm signal continues for some time and does not deal with, this fault sensor of system automatic shield.
8. a kind of air-conditioning system method of operation according to claim 2, is characterized in that described operation strategy comprises an automatic testing process of circuit failure:
According to the discharge of source, different engineering-environment design discrepancy ground well group, relatively soil source water knockout drum flow sensor and soil source water collector flow sensor numerical value, when difference is higher than the more than 2% of design discharge, judgement ground source well group pipeline breaking, and send pipeline breaking alarm signal by machine room team control unit;
Set the temperature difference of source, the ground well group water of coming in and going out according to different engineering-environments, relatively soil source water knockout drum temperature sensor and soil source water collector temperature sensor numerical value, when difference is higher than setting the more than 50% of the temperature difference, source, judgement ground well group pipeline obstruction, and send pipeline obstruction alarm signal by machine room team control unit.
9. a kind of air-conditioning system method of operation according to claim 2, is characterized in that machine room group control system building database, stores heat exhaust or row's cold of source, ground per hour well group, and the temperature data of source, various places well group.
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Address after: No. 33, Jiangning District, Nanjing, Jiangsu, Jiangsu Patentee after: Nanjing East create energy saving Technology Co., Ltd. Address before: 211100 No. 299, Keyuan Road, Science Park, Jiangning District, Nanjing, Jiangsu. Patentee before: Nanjing Dongtru System Engineering Co., Ltd. |
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Denomination of invention: Underground heat balance and heat exchange device for ground source heat pump air-conditioning system and operation mode Effective date of registration: 20200407 Granted publication date: 20160622 Pledgee: Jiangsu Credit Financing Guarantee Co., Ltd. Pledgor: Nanjing Dongchuang Energy Saving Technology Co.,Ltd. Registration number: Y2020980001324 |