CN101191680A - Double stage all heat reclamation water-cooling screw rod water chilling unit - Google Patents
Double stage all heat reclamation water-cooling screw rod water chilling unit Download PDFInfo
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- CN101191680A CN101191680A CNA2006101459000A CN200610145900A CN101191680A CN 101191680 A CN101191680 A CN 101191680A CN A2006101459000 A CNA2006101459000 A CN A2006101459000A CN 200610145900 A CN200610145900 A CN 200610145900A CN 101191680 A CN101191680 A CN 101191680A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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Abstract
The invention provides a twin-stage total heat recycle-water cold screw water chilling unit, comprising a condenser connected with a compressor, a primary heat recoverer, a thermostatic expansion valve and an evaporator, wherein, a secondary heat recoverer is arranged between the primary heat recoverer and the thermostatic expansion valve, an electric control valve is arranged between the primary heat recoverer and the secondary heat recoverer, the secondary heat recoverer is connected with a temperature control system; the secondary heat recoverer is provided with two Freon-water counter-current heat exchangers which are connected in series with each other. When an air conditioner is used, a refrigeration system of the unit provides a freezing circulating water supply air conditioner system with 7 to 12 openings. The invention adopts two independent heat exchangers, thereby realizing the independent recycle and the complete recycle of condensing hidden heat and sensible heat; because the invention adopts a twin-stage counter-current heat exchanger, the condensing temperature is not increased when the high temperature water is made; therefore, the energy consumption of the compressor is greatly decreased, the value of EER is increased by 10 to 20 percent, and the amount of heat recover condenses and discharges the heat by one hundred percent; the cost is lowered and the invention yields good economic returns in market.
Description
Technical field
The present invention relates to a kind of refrigerating plant, particularly a kind of double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units.
Background technology
China is an energy starved country, is again simultaneously an energy-consuming big country.Economic growth and urbanization fast development are to energy supply and utilize mode to propose severe challenge.Rarely seen in the history growing continuously and fast appearred in the electricity needs of China in recent years, and imbalance between supply and demand is outstanding.By the end of in by the end of February, 2004, the electricity consumption average speed of growth surpassed 15% in continuous 22 months.Wherein, air-conditioning accounts for about 20% of national power consumption as the large electricity consumer, and because the air conditioning electricity time concentrates, has increased the weight of the peak power load.Greatly develop the energy-conserving and environment-protective green product, advance building energy conservation, significance is arranged for solving the China's energy problem.So the Party Central Committee is with " energy development and saving develop simultaneously, and save first " the strategic state basic policy as current social development, each enterprise is all around this central point development.
Along with improving constantly of people's living standard, a large amount of constructions of skyscraper, newly-built skyscraper must install air-conditioning system additional.But use common central air-conditioning system always to have considerable condensation heat directly to enter atmosphere, lose in vain, cause bigger energy waste, and have thermal pollution surrounding environment.From energy-conservation angle, for skyscraper, building needs a large amount of domestic hot-water supplies again, if can retrieve to heat the domestic hot-water with condensation heat is all or part of, not only the condensation heat pollution on the environment can be reduced, but also many energy can be saved.Air-conditioning recuperation of heat unit just can be realized this function, but the water-cooled single-stage recuperation of heat unit in past is because condensation temperature is low, it is low that the heat that reclaims reaches temperature less, the domestic hot-water who reclaims uses and is restricted, and twin-stage recuperation of heat unit reclaims condensation latent heat and sensible heat respectively owing to adopt the two levels of thermal recover, can obtain the recuperation of heat amount of whole condensation heat of higher recycle-water gentleness 100%, therefore, its practicality is wider.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide a kind of rational in infrastructure, perfect in shape and function, optimization can provide the hot water of different water temperatures simultaneously; The cold screw chiller group of the full recuperation of heat of the twin-stage air-conditioning unit that heat recovery rate height, energy consumption of compressor be low, can improve Energy Efficiency Ratio.
The objective of the invention is to be achieved through the following technical solutions:
The double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units, comprise the condenser, one-level heat regenerator, heating power expansion valve, the evaporimeter that are electrically connected with compressor, set up the secondary heat regenerator between described one-level heat regenerator and the heating power expansion valve, set up electric control valve and temperature control system between described one-level heat regenerator and the secondary heat regenerator.
Described secondary heat regenerator is provided with the freon-water contra-flow heat exchanger of two series connection.
Described electric control valve is an electric T-shaped valve.
Described compressor is cold screw.
Described condenser is a shell-tube type.
Described evaporimeter is a shell-tube type.
Described temperature control system is the PLC temperature control system.
After the present invention adopts technique scheme, can reach following beneficial effect:
1, whole recovery problems of condenser heat have been solved.The present invention adopts a freon-water sensible heat heat exchanger to reclaim heat of high temperature, adopts a freon-water latent heat heat exchanger to reclaim condensation latent heat simultaneously, can realize the recovery of whole condensation heat.
2, solved multiple leaving water temperature problem.The present invention adopts two heat exchangers, respectively with the freon heat exchange of different temperatures, each heat exchanger all has independently water inlet pipe and water outlet pipe, adopt the method for series connection simultaneously, the middle warm water that second level heat exchanger (latent heat exchanger) is come out is connected to the first order (sensible heat exchanger) and heats, and obtains the water of higher temperature.By PLC and electric control valve control Total Water and the size of the bypass water yield and the water temperature that ratio can be regulated recuperation of heat amount and different temperatures.
3, solved under low condensation temperature and producing the high-temperature-hot-water problem.Common single-stage recuperation of heat unit, owing to adopt the single-stage recuperation of heat, can only reclaim the hot water (being lower than 40 ℃) that leaving water temperature is lower than condensation, if recovery high-temperature-hot-water, the recuperation of heat amount that this is drops sharply to about 30%, and condensation temperature and compressor exhaust temperature sharply rise, and consumption of compressor can rise and influence the working life of compressor like this.The twin-stage recuperation of heat by second level recuperation of heat preheating, is carried out the sensible heat exchange with the compressor high-temperature exhaust air again when producing high-temperature-hot-water, thus condensation temperature can not raise, thereby avoided the problems referred to above.
4, can satisfy different demands.The present invention can provide simultaneously different water temperatures hot water; Like product can only provide a kind of leaving water temperature can not satisfy various demands.
5, Waste Heat Recovery rate height.The present invention has realized the utilization of secondary energy sources on improvements over the prior art, reduced energy consumption, can realize full Waste Heat Recovery, recuperation of heat amount 100% condensation discharging heat; Like product can only reclaim 30% condensation heat, has higher utility,
6, reduced energy consumption.Owing to adopt the two-stage countercurrent heat exchanger, when producing high-temperature-hot-water, can not improve condensation temperature, therefore greatly reduce energy consumption of compressor, can improve Energy Efficiency Ratio EER value 10～20%.Like product can only improve EER value 5～10%.
7, reduced the subscriber equipment cost of investment.The present invention reduces the consumption of electric energy for realizing that the approach that provides is provided waste heat again, realizes the sustainable development of the energy.Because the recuperation of heat amount is big and temperature is higher, the user need not purchase boiler fully again after purchasing the full recuperation of heat handpiece Water Chilling Units of twin-stage, so reduced cost of investment significantly, have the vast market economic benefit.
8, prolonged service life.After the present invention increases substantially operating efficiency, can shorten the necessary working time, the wear and tear in machines rate is reduced, service time increases, so can prolong the service life of air-conditioning unit.
9, reduced consumer cost.The waste heat that the present invention discharges the air conditioner cold water unit carries out the secondary utilization, improves water temperature, has reduced the delivery temperature and the condensing pressure of compressor, has both realized the secondary recovery of the energy, has reduced the power consumption of air-conditioning again, makes the consumer reduce consumer cost.
Description of drawings
Fig. 1 is the fundamental diagram of prior art;
Fig. 2 is a fundamental diagram of the present invention;
Fig. 3 is for pressing an enthalpy (Lg-H) figure among the present invention.
Description of reference numerals
A, compressor b, condenser c, one-level heat regenerator (elevated temperature heat recovery) d, secondary recuperation of heat (in warm recovery) e, heating power expansion valve f, evaporimeter g, PLC controller h, electric control valve
1, evaporimeter saturated vapor point 1 ", compressor sucks point 2 ", compressor air-discharging point 2, condenser saturated vapor point 2 ', one-level heat regenerator exit point 3, condenser saturated liquid point 3 ", secondary recuperation of heat exit point 4 ", heating power expansion valve inlet point 4, do not have that constant enthalpy point 5 when cold, running water advance 6, middle warm water goes out 7, high-temperature-hot-water goes out 8, evaporimeter is intake 9, evaporimeter water outlet 10, condenser water outlet 11, condenser are intake
The specific embodiment
Below in conjunction with drawings and the specific embodiments the present invention is described in further detail:
Referring to Fig. 1
Fig. 1 is the fundamental diagram of prior art.In Fig. 1, compressor a is connected with condenser b, heat regenerator c, and then is connected with heating power expansion valve e, evaporimeter f; Condensed water 11 enters condenser b running, condensed water 10 is discharged outside the air conditioner, only be provided with one-level heat regenerator c at the rear of condenser b, when the recovery water temperature is higher than condensation temperature (general 40 ℃), can only reclaim sensible heat in the condensation heat (account for whole condensation heat 10～15%), at this moment there is 85～90% condensation heat will enter in the atmosphere, caused the thermal pollution of energy dissipation and atmosphere.
Referring to Fig. 2
Fig. 2 is a fundamental diagram of the present invention.In Fig. 2, the cold screw chiller group of the full recuperation of heat of twin-stage is by the formation that is connected of cold screw compressor a, shell and tube condenser b, one-level heat regenerator c (elevated temperature heat recover), secondary heat regenerator d (in warm recover), shell and tube evaporator f, heating power expansion valve e, PLC temperature control system g.When air-conditioning uses, Crew Cooling System provides 7～12 mouthfuls freeze cycle water for air-conditioning system, simultaneously one-level heat recovery system c and secondary heat recovery system d utilize the running water of 20 ℃ of waste heat that refrigeration machine discharges, 60 ℃ and 37～44 ℃ of living-hygienic hot water are provided respectively, and total Energy Efficiency Ratio of unit reaches 5.0W/W above (unit refrigerating capacity+unit reclaims the ratio of heat and input electric power); Its operation principle is identical with conventional refrigeration principle.
Its workflow is: the gas of the HTHP that compressor a discharges enters one-level heat regenerator c and secondary heat regenerator d, and domestic water is heated in heat release in one-level heat regenerator c and secondary heat regenerator d.One-level heat regenerator c reclaims 30% condenser b load, and secondary heat regenerator d reclaims 70% condensation load.One-level heat regenerator c reclaims the latent heat load (about 18% condensation load) of whole sensible heat loads (about 12% condenser duty) and part, secondary heat regenerator d reclaims most latent heat condensation load heat (about 66% condensation load) and whole cold condensation heat of mistake (about 4% condensation load), and the two levels of thermal recover has reclaimed whole condenser heats.
Referring to Fig. 3
Fig. 3 is pressure-enthalpy (lgP-H) figure among the present invention.In lgP-H figure, 2 " o'clock to 3 " process of point is whole condensation process, wherein 2 o'clock to 2 " point is the superheat section sensible heat exothermic process of refrigerant, and 2 o'clock to 3 o'clock is the latent heat exothermic process of refrigerant, 3 o'clock to 3 " point is the super cooled sect sensible heat exothermic process of refrigerant.One-level heat regenerator c reclaims 2 " o'clock to 2 ' point load, secondary heat regenerator d reclaims at 2 ' o'clock to 3 " point load, the two levels of thermal recover has reclaimed whole condenser heats.The one-level recuperation of heat utilizes superheated vapor cooling, the partial condensation heating domestic water of refrigerant, and water temperature (60 ℃) is higher than condensation temperature (40 ℃); The secondary recuperation of heat refers to the cooling of refrigerant saturated vapor and crosses the cold recuperation of heat heating domestic water that coagulates that water temperature (37 ℃) is lower than condensation temperature (40 ℃).In practical engineering application, because water system pipeline and energy-accumulating water tank heat insulation effect difference etc. will cause temperature drop to a certain degree, the water temperature of secondary recuperation of heat is lower, comfortableness is relatively poor, can be by the aperture of PLC controller g and temperature controller control valve h, the hot water of part or all of one-level heat regenerator c is mixed with the water of secondary heat regenerator d, thereby improve the water temperature of secondary heat regenerator d.Sometimes can take following measure for improving the domestic water water temperature, if the domestic water thermic load is less than air-conditioning side thermic load, then adopt portion of hot to retrieve to produce domestic water, the delivery temperature of compressor a can be up to 70～85, and at this moment the domestic water water outlet of one-level heat regenerator is up to 60～70.
Claims (7)
1. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units, comprise the condenser (b), one-level heat regenerator (c), heating power expansion valve (e), the evaporimeter (f) that are electrically connected with compressor (a), it is characterized in that: set up secondary heat regenerator (d) between described one-level heat regenerator (c) and the heating power expansion valve (e), set up electric control valve (h) and temperature control system (g) between described one-level heat regenerator (c) and the secondary heat regenerator (d).
2. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described secondary heat regenerator (d) is provided with the freon-water contra-flow heat exchanger of two series connection.
3. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described electric control valve (h) is an electric T-shaped valve.
4. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described compressor (a) is cold screw.
5. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described condenser (b) is a shell-tube type.
6. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described evaporimeter (f) is a shell-tube type.
7. double stage all heat reclamation water-cooling screw rod handpiece Water Chilling Units according to claim 1 is characterized in that: described temperature control system (g) is the PLC temperature control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101459000A CN101191680A (en) | 2006-11-22 | 2006-11-22 | Double stage all heat reclamation water-cooling screw rod water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101459000A CN101191680A (en) | 2006-11-22 | 2006-11-22 | Double stage all heat reclamation water-cooling screw rod water chilling unit |
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| Publication Number | Publication Date |
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| CN101191680A true CN101191680A (en) | 2008-06-04 |
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| CNA2006101459000A Pending CN101191680A (en) | 2006-11-22 | 2006-11-22 | Double stage all heat reclamation water-cooling screw rod water chilling unit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128509A (en) * | 2011-02-25 | 2011-07-20 | 合肥美的荣事达电冰箱有限公司 | Low-noise refrigerating system and refrigerating method thereof |
| CN102706042A (en) * | 2012-05-18 | 2012-10-03 | 烟台荏原空调设备有限公司 | Evaporator for recovering exhaust heats and heat pump device using the same |
| CN104729036A (en) * | 2015-03-19 | 2015-06-24 | 合肥天鹅制冷科技有限公司 | Condensate heat recovery system having accurate temperature control function |
| CN106051902A (en) * | 2016-06-22 | 2016-10-26 | 珠海格力电器股份有限公司 | Wall-mounted stove |
| CN108007024A (en) * | 2017-12-22 | 2018-05-08 | 珠海市银岭冷冻设备有限公司 | A kind of multi-joint refrigerating system of total heat recovery |
| CN109757907A (en) * | 2019-01-09 | 2019-05-17 | 青岛海尔空调器有限总公司 | Energy resource system, the control method and device of energy resource system, storage medium |
| CN112797607A (en) * | 2021-01-04 | 2021-05-14 | 珠海格力电器股份有限公司 | Heat recovery system, control method and air conditioning unit |
-
2006
- 2006-11-22 CN CNA2006101459000A patent/CN101191680A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128509A (en) * | 2011-02-25 | 2011-07-20 | 合肥美的荣事达电冰箱有限公司 | Low-noise refrigerating system and refrigerating method thereof |
| CN102706042A (en) * | 2012-05-18 | 2012-10-03 | 烟台荏原空调设备有限公司 | Evaporator for recovering exhaust heats and heat pump device using the same |
| CN104729036A (en) * | 2015-03-19 | 2015-06-24 | 合肥天鹅制冷科技有限公司 | Condensate heat recovery system having accurate temperature control function |
| CN106051902A (en) * | 2016-06-22 | 2016-10-26 | 珠海格力电器股份有限公司 | Wall-mounted stove |
| CN108007024A (en) * | 2017-12-22 | 2018-05-08 | 珠海市银岭冷冻设备有限公司 | A kind of multi-joint refrigerating system of total heat recovery |
| CN109757907A (en) * | 2019-01-09 | 2019-05-17 | 青岛海尔空调器有限总公司 | Energy resource system, the control method and device of energy resource system, storage medium |
| CN112797607A (en) * | 2021-01-04 | 2021-05-14 | 珠海格力电器股份有限公司 | Heat recovery system, control method and air conditioning unit |
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Open date: 20080604 |