CN101290178B - R125 near critical circulating high temperature heat pump unit - Google Patents
R125 near critical circulating high temperature heat pump unit Download PDFInfo
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- CN101290178B CN101290178B CN2008100497042A CN200810049704A CN101290178B CN 101290178 B CN101290178 B CN 101290178B CN 2008100497042 A CN2008100497042 A CN 2008100497042A CN 200810049704 A CN200810049704 A CN 200810049704A CN 101290178 B CN101290178 B CN 101290178B
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Abstract
The present invention relates to an R125 near-critical circulation high-temperature heat pump unit. The unit comprises a heat pump unit and a water storing unit. The heat pump unit is a closed circuit consisting of a compressor, a condenser, a liquid storage device and an evaporator which are connected in sequence by copper pipes. Throttling valves are respectively arranged on the copper pipe between the condenser and the liquid storage device and between the liquid storage device and the evaporator so as to form a double-throttling structure. The heat exchanging channel of the evaporator is connected with a water inlet pipe and a water outlet pipe which are used for refrigeration water of an air-conditioner. In the water storing unit, a main water pipe is connected with a water inlet of the heat exchanging channel of the condenser through a water pump. A water outlet of the heat exchanging channel of the condenser is connected with a cold water pipeline through a water mixing valve. The mixed pipeline is a domestic hot water pipeline for being used in kitchens and washrooms. The water outlet of the condenser is communicated with the water storage tank. A pipeline for providing bath water is communicated with the water storage tank. The unit has the advantages of large temperature range, small pressure ratio, easy adjustment, simple flow and high heat pump performance parameter at a certain cold and heat source condition, etc.
Description
Technical field:
The present invention relates to a kind of good thermodynamic property that has, the nearly critical cycle high temperature heat pump of the simple R125 of temperature wide accommodation and flow process unit.
Background technology:
Heat pump techniques is as a kind of power-saving technology; the heat energy of Duoing than drive energy can be provided; has special advantages aspect energy savings, the environmental protection; obtained application widely in field of Refrigeration and Air-conditioning; and good energy-conservation and environmental benefit have been obtained; yet, but well do not used with hot field heat pump in other tradition of China, such as the Winter heat supply of northern area, life with aspects such as hot water and process steam, hot water supplies.At present, China with in the heat structure, 100 ℃ and following accounted for a large portion, relied on middle and small burn coal boiler to provide and this part heat energy is main in the past with heat.Because the challenge of the environmental problem that is gone from bad to worse; a large amount of in the past heating equipments (mainly being middle-size and small-size coal burning boiler) of making fuel with coal that use need to seek more substituting of cleaning; further maturation along with energy crisis and Refrigeration Technique; the reliability and the efficient of heat pump assembly also are enhanced; according to primary energy consumption and economic analysis, when reaching 2.0-2.5, the heating efficiency of heat pump just has suitable energy efficiency and economy with the system that uses the oil burning boiler heat supply.High efficiency heat pump has better economic and good environmental characteristics, and in today that the energy and environmental problem are come into one's own day by day and in the future, circulation of research and development high-efficiency heat pump and system thereof have great importance.
At present also having many problems in the heat pump application, mainly is that the temperature range of conventional single-stage heat pump is little, realize the heat supply of the big temperature difference, must adopt the two-stage or the flow process of multi-stage compression more, thereby system is complicated, and operation is regulated inconvenient.The application of critical cycle on refrigeration and heat pump is because the environmental problem of cold-producing medium is forced to select for use natural refrigerant CO
2Put forward, because of CO
2Critical-temperature lower, condensation temperature all is higher than critical-temperature in the ordinary course of things, this originally is a helpless selection, but to CO
2Stride in the research of critical cycle and find, it can be well be complementary with the variations in temperature of hot water heating process in the variations in temperature of cooling procedure, experimental results show that it has higher thermodynamic coefficient, can work in than large-temperature range when making heat pump fluid.CO
2Being natural refrigerant, be best from the angle of environment, but its critical pressure is too high, and stagnation temperature is spent low, and its thermodynamic property is unsatisfactory, is very limited in the application of heat pump.And showed potentiality preferably in this respect based on the cold-producing medium of R125 working medium.
The Winter heat supply of northern area, life are with in the fields such as hot water and process steam, hot water supply, use present heat pump cycle and system to be difficult to the effect that reaches desirable, in addition, a lot of areas, the north are to needing cooling summer, needing the building of heat supply winter, the requirement that refrigeration and two systems of heating satisfy building often is set simultaneously, and this in fact also is a kind of waste.The good selection beyond doubt of the nearly critical heat pump of R125 working medium, except normal refrigeration, the temperature variation characteristic of its circulation exothermic process has determined its unique advantage on heat hot water, and is all significant to enlarging aspects such as heat pump application field, raising energy utilization rate, minimizing environmental pollution to this cycle performance research and utilization.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of on the basis of conventional heat pump, realize the nearly critical cycle of R125 working medium by changing compressor as heat pump fluid, before and after liquid reservoir, install a choke valve simultaneously respectively additional, constitute the twin-stage throttle structure, so that the nearly critical cycle high temperature heat pump of the R125 unit of system's high-low pressure control.
The object of the present invention is achieved like this: comprise heat pump unit and water storage unit, it is characterized in that:
Heat pump unit is the closed-loop path that is connected and composed successively by copper pipe by compressor, condenser, liquid reservoir, evaporimeter, in heat pump unit, on the copper pipe between condenser and liquid reservoir, liquid reservoir and the evaporimeter, respectively install a choke valve additional, constitute the binodal flow structure, on the hot switching path of evaporimeter, be connected with the water inlet pipe and the outlet pipe that use as the idle call chilled water
In the water storage unit, water main is connected by the water inlet of water pump with the hot switching path of condenser, the delivery port of the hot switching path of condenser is connected with cold water pipes by mixing water valve, the domestic hot-water pipeline of pipeline after mixed for using for kitchen, toilet, the delivery port of condenser is also connected with water storage tank, and connects the pipeline that has for bathing water on water storage tank.
Refrigeration working medium in heat pump unit is the new working medium R125 of HFC class; The R125 cold-producing medium is nearly critical cycle state in intrasystem circulation.
The copper pipe that between described compressor, condenser, liquid reservoir, the evaporimeter with the wall thickness is 1.0mm connects successively, constitutes the closed-loop path.
The present invention has following good effect: as calculated and the experiment, the result shows that its COP can have good thermodynamic property up to more than 3.0, temperature wide accommodation and flow process are simple.The nearly critical heat pump of R125 working medium can obtain to use preferably in following field as a kind of heat pump assembly that can adapt to great temperature difference heat supply:
(1) air conditioner cold and hot water is two for system.Promptly when being provided, air conditioning water provide temperature to reach high-temperature-hot-water more than 80-90 ℃.CO
2Stride critical cycle because its critical pressure too high (7.37MPa), stagnation temperature is spent low (31.1 ℃), its thermodynamic property is not fine, in the application of heat pump, be subjected to very big influence, adopt the R125 refrigeration working medium to carry out critical cycle and then have refrigerating efficiency preferably, can under the operating mode of air conditioner refrigerating, provide temperature higher hot water.(2) air-conditioning heat supply hold over system.The air-conditioning hold over system all adopts electric boiler as thermal source at present, for reducing the accumulation of heat volume, generally heat accumulation hot water will be heated to more than 90 ℃ from about 50 ℃.Because critical heat pump can be heated to high temperature with hot water efficiently, makes the high-temperature water accumulation of heat have better economy.(3) domestic hot-water supply system.The domestic hot-water often needs water is heated to more than 60 ℃ from normal temperature, and critical heat pump just in time has the advantage of this respect, can reach higher energy efficiency.(4) production technology heat supply and small area heat supply.The heat supply temperature of all having relatively high expectations and bigger supply backwater temperature difference is arranged, also bigger to the demand of energy, this is the advantage of critical heat pump just.
The present invention has that temperature range is big, pressure ratio is little, is easy to regulate, heat pump performance coefficient advantages of higher under certain Cooling and Heat Source condition.This circulation is not only different with conventional heat pump cycle characteristic, with CO
2It is also different in a lot of places to stride critical cycle.Adopt the comparable conventional single-stage high temperature heat pump of high temperature refrigerant that uses of nearly critical cycle to raise the efficiency 30%-50%, systematic parameter is also much stable than conventional heat pump when the range of temperature of heat supply is big.The core component of heat pump---compressor adopts the compressor that adapts to the nearly critical cycle characteristics of R125 working medium.Nearly critical cycle high temperature heat pump can obtain in system, accumulation of heat, life and the process heat water supply system better to use as a kind of heat pump assembly that can adapt to great temperature difference heat supply two confession of air conditioner cold and hot water.This device to enlarge the source pump application, realize its real " dual-use ", improve energy utilization rate, to reduce aspects such as environmental pollution significant.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
The specific embodiment:
As shown in Figure 1, the present invention includes heat pump unit I and water storage unit II, heat pump unit I is the closed-loop path that is connected and composed successively by copper pipe by compressor 1, condenser 2, liquid reservoir 3, evaporimeter 4, in heat pump unit, on the copper pipe between condenser and liquid reservoir, liquid reservoir and the evaporimeter, respectively install a choke valve 5 additional, constitute the binodal flow structure, on the hot switching path of evaporimeter 4, be connected with water inlet pipe 11 and the outlet pipe 12 that uses as the idle call chilled water by valve 10.In water storage unit II, water main 6 is connected by the water inlet of water pump 7 with the hot switching path of condenser 2, the delivery port of the hot switching path of condenser 2 is connected with cold water pipes by mixing water valve 8, the domestic hot-water pipeline of pipeline after mixed for using for kitchen, toilet, the delivery port of condenser 2 is also connected with water storage tank 9, and connects the pipeline that has for bathing water on water storage tank 9.Refrigeration working medium in heat pump unit is the new working medium R125 of HFC class; The R125 cold-producing medium is nearly critical cycle state in intrasystem circulation.
As shown in the figure, in the heat pump unit, between compressor, condenser, liquid reservoir, the evaporimeter be that the copper pipe of 1.0mm connects successively with the wall thickness, constitute the closed-loop path; On the copper pipe between condenser and liquid reservoir, liquid reservoir and the evaporimeter, respectively install a choke valve additional, constitute the binodal flow structure; R125 cold-producing medium in the heat pump unit adopts nearly critical cycle.In the water storage unit, water main comes water process water pump to enter condenser (water heater) heat exchange, and after the high-temperature-hot-water part after the heat exchange mixed by mixed water valve and cold water, formation can be for the domestic hot-water of kitchen, toilet use, part high-temperature-hot-water enters water storage tank, for bathing water.Carrying out water after the heat exchange by evaporimeter can be used as the idle call chilled water and uses.
Claims (3)
1. the nearly critical cycle high temperature heat pump of a R125 unit comprises heat pump unit (I) and water storage unit (II), it is characterized in that:
Heat pump unit (I) is the closed-loop path that is connected and composed successively by copper pipe by compressor (1), condenser (2), liquid reservoir (3), evaporimeter (4), in heat pump unit, on the copper pipe between condenser and liquid reservoir, liquid reservoir and the evaporimeter, respectively install a choke valve (5) additional, constitute the binodal flow structure, on the hot switching path of evaporimeter (4), be connected with the water inlet pipe (11) and the outlet pipe (12) that use as the idle call chilled water
In water storage unit (II), water main (6) is connected by the water inlet of water pump (7) with the hot switching path of condenser (2), the delivery port of the hot switching path of condenser (2) is connected with cold water pipes by mixing water valve (8), the hot water pipeline of pipeline after mixed for using for kitchen, toilet, the delivery port of condenser (2) is also connected with water storage tank (9), and upward connects the pipeline that has for bathing water at water storage tank (9).
2. the nearly critical cycle high temperature heat pump of R125 according to claim 1 unit is characterized in that: the refrigeration working medium in heat pump unit is the new working medium R125 of HFC class; The R125 cold-producing medium is nearly critical cycle state in intrasystem circulation.
3. the nearly critical cycle high temperature heat pump of R125 according to claim 1 unit is characterized in that: the copper pipe that between described compressor, condenser, liquid reservoir, the evaporimeter with the wall thickness is 1.0mm connects successively, constitutes the closed-loop path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100497042A CN101290178B (en) | 2008-05-07 | 2008-05-07 | R125 near critical circulating high temperature heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100497042A CN101290178B (en) | 2008-05-07 | 2008-05-07 | R125 near critical circulating high temperature heat pump unit |
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| Publication Number | Publication Date |
|---|---|
| CN101290178A CN101290178A (en) | 2008-10-22 |
| CN101290178B true CN101290178B (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100497042A Expired - Fee Related CN101290178B (en) | 2008-05-07 | 2008-05-07 | R125 near critical circulating high temperature heat pump unit |
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|---|---|
| CN (1) | CN101290178B (en) |
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- 2008-05-07 CN CN2008100497042A patent/CN101290178B/en not_active Expired - Fee Related
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| CN101290178A (en) | 2008-10-22 |
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Granted publication date: 20100915 Termination date: 20110507 |