CN105180433B - Realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump and its control method - Google Patents
Realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump and its control method Download PDFInfo
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- CN105180433B CN105180433B CN201510681753.8A CN201510681753A CN105180433B CN 105180433 B CN105180433 B CN 105180433B CN 201510681753 A CN201510681753 A CN 201510681753A CN 105180433 B CN105180433 B CN 105180433B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003507 refrigerant Substances 0.000 claims abstract description 23
- 239000008236 heating water Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Invention describes a kind of Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements2Heat pump and its control method, belong to heat pump heating circulating technology, existing CO2Heat pump product can not meet high-temperature circulating type demand for heat；The present invention be by using high temperature refrigerant as the subcritical cycle loop of refrigerant and with CO2The heat pump being combined into for the trans critical cycle loop of refrigerant；Two circulation loops share a devaporizer, auxiliary gas cooler, main evaporator as subcritical cycle loop of the devaporizer as trans critical cycle loop.Trans critical cycle loop provides the user leaving water temperature as 70 90 DEG C, and return water temperature is 70 80 DEG C of circulating hot water, and 50 60 DEG C of hot water is produced in subcritical cycle loop.The present invention is remarkably improved the Trans-critical cycle CO for meeting the circulating heating condition requirement of high return water temperature2The efficiency of system, and solve single-stage CO2The circulatory system can not realize the technical barrier of more than the 70 DEG C circulating heatings of return water temperature.
Description
Technical field
The present invention relates to heat pump to heat circulating technology, more particularly to realizes a kind of efficiently circulating for high return water temperature
The Trans-critical cycle CO of heating2System.
Background technology
As a kind of non ozone depleting and the natural refrigerant of low temperature chamber effect, CO2It is heat supplying air conditioning field replacement fluorine profit
One of high potential refrigerant, develop for freezing, air-conditioning, the CO of the industry and commerce application scenario such as heat supply2Heat pump techniques, it has also become
One research hot topic of current domestic colleges and universities and enterprise.Particularly across critical CO2Circulating heat pump system can be produced than with common fluorine
Leon is the higher hot water of the heat pump temperature of refrigerant（The maximum water temperature of most of freon system heating is 60
℃）, and for there is heat demand in this temperature range（Hot water or hot blast）Occasion, such as butcher, electroplate, drying is all high consumption
It and can be badly in need of carrying out the industry of conventional boiler replacement, thus, develop high temperature CO2Heat pump techniques are to realizing that the energy-conservation of these industries subtracts
Row's target, which has, important realizes meaning.
Supercritical CO2Temperature glide characteristic in gas cooler exothermic process, can cause water to add from lower temperature
Heat arrives up to 90 DEG C of temperature, but is higher than 70 DEG C of circulating mode of heating, Trans-critical cycle CO for return water temperature2The efficiency of system
It is very low, can not be realized at all even with single stage compress circulation, thus significantly limit Trans-critical cycle CO2System is answered
With, such as the reheating of water tank heat preserving hot water, some technical process etc. require that high-temperature circulating type heats in electroplating industry.Mesh
Before, in the market is almost without a CO2Heat pump product can meet high-temperature circulating type demand for heat.
The content of the invention
The technical problem to be solved in the present invention and the technical assignment proposed are to overcome existing CO2Heat pump product can not meet height
A kind of the defects of warm circulating demand for heat, there is provided Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements2
Heat pump and its control method
To reach above-mentioned purpose, the Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements of the invention2
Heat pump, it is characterized in that：
The system be by using high temperature refrigerant as the subcritical cycle loop of refrigerant and with CO2Followed for the Trans-critical cycle of refrigerant
The heat pump that loop back path is combined into；
Described trans critical cycle loop includes the compressor A, a gas cooler, an evaporation being sequentially connected with
Cooler, a throttle valve A and an evaporator, the gas cooler are used to be connected to 70~90 DEG C of circulating hot water demands use
High return water temperature is simultaneously realized in family with 70~80 DEG C of return water temperature, and the evaporator is connected with a thermal source A, the devaporizer
For the auxiliary gas cooler in the trans critical cycle loop；
Described subcritical cycle loop include be sequentially connected with a compressor B, a condenser, a choke valve B,
One auxiliary evaporator and described devaporizer, the condenser are used to be connected to 50~60 DEG C of hot water demand users, institute
State auxiliary evaporator to be connected with a thermal source B, the devaporizer is the main evaporator in the subcritical cycle loop.
Optimization technique means as heat pump of the present invention：Water in Condenser side water side and the gas cooler
The first stop valve is provided between the inlet end of water side, between Water in Condenser side water side and 50~60 DEG C of hot water demand users
Provided with the second stop valve.
Optimization technique means as heat pump of the present invention：Described high temperature refrigerant is that can produce 50~60 DEG C of systems
The refrigerant of hot water temperature.
Optimization technique means as heat pump of the present invention：Described high temperature refrigerant be R134a, R404A,
Any one of R407C, R410A and R507C.
To reach above-mentioned purpose, the Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements of the invention2
The control method of heat pump, one scheme are：Second stop valve is closed, opens first stop valve, adjusts institute
Auxiliary evaporator and the heat source temperature or flow of the evaporimeter thermal source side are stated, the choke valve B and the throttle valve A are set
Aperture, the water-carrying capacity of the gas cooler water side is controlled, to be 10~30 DEG C of cold water through the condenser by inflow temperature
50~60 DEG C are heated to, is then heated to required 70~90 DEG C heating water temperature through the gas cooler again.
To reach above-mentioned purpose, the Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements of the invention2
The control method of heat pump, its second scheme are：First stop valve is closed, opens second stop valve, regulation
The auxiliary evaporator and the heat source temperature or flow of the evaporimeter thermal source side, set the choke valve B and the throttle valve A
Aperture, the water-carrying capacity of the gas cooler and the Water in Condenser side is controlled, so that inflow temperature is cold as 10~30 DEG C
Water produces the hot water for 50~60 DEG C through the condenser so that the gas cooler provide inflow temperature be 70~80 DEG C,
Leaving water temperature is 70~90 DEG C of circulating hot water.
Invention significantly improves the Trans-critical cycle CO for the circulating heating condition requirement for meeting high return water temperature2The effect of system
Rate, solves single-stage CO2The circulatory system can not realize the technical barrier of more than the 70 DEG C circulating heatings of return water temperature.
Brief description of the drawings
Fig. 1 realizes high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements for the present invention2Heat pump is
System schematic diagram；
Label declaration in figure：
1- compressors A, 2- gas cooler, 3- devaporizers, 4- throttle valve As, 5- evaporators；
6- compressors B, 7- condenser, 8- choke valves B, 9- auxiliary evaporator；
10~70-90 DEG C of circulating hot water demand user, 11- thermals source A, 12- thermal source B, 13-50~60 DEG C hot water demand use
Family.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements of the present invention2Heat pump, such as Fig. 1 institutes
Show, the system be by using high temperature refrigerant as the subcritical cycle loop of refrigerant and with CO2Returned for the trans critical cycle of refrigerant
The heat pump that road is combined into；
Trans critical cycle loop includes 2, a compressor A1, gas cooler evaporation coolings being sequentially connected with
3, throttle valve As 4 of device and an evaporator 5, gas cooler 2 are used to be connected to 70~90 DEG C of circulating hot water demand users 10
And high return water temperature is realized with 70~80 DEG C of return water temperature, evaporator 5 is connected with a thermal source A11, and devaporizer 3 is should be across
The auxiliary gas cooler in critical cycle loop；
Subcritical cycle loop includes a compressor B6, a condenser 7, choke valve B8, one being sequentially connected with
Individual auxiliary evaporator 9 and devaporizer 3, condenser 7 are used to be connected to 50~60 DEG C of hot water demand users 13, auxiliary evaporator
9 are connected with a thermal source B12, and devaporizer is the main evaporator in the subcritical cycle loop.
Further, it is provided with the first stop valve between the water side water side of condenser 7 and the water side inlet end of gas cooler 2
71, the second stop valve 72 is provided between the water side water side of condenser 7 and 50~60 DEG C of hot water demand users 13.
Specifically, high temperature refrigerant be can produce 50~60 DEG C heating water temperature refrigerants, can be R134a,
Any one of R404A, R407C, R410A and R507C.
According to above-mentioned high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump, it is possible to achieve two
Kind heating condition requirement：
One is realize the water side of condenser 7（That is 50~60 DEG C of sides of hot water demand user 13）Inflow temperature be 10-30 DEG C,
And the water side of gas cooler 2（That is the 70-90 DEG C of side of circulating hot water demand user 10）Leaving water temperature be 70-90 DEG C of heating condition
It is required that：Open the first stop valve 71, close the second stop valve 72 so that the first condensed device 7 of the cold water that the water side of condenser 7 is entered
Afterwards, then through gas cooler 2, while auxiliary evaporator 9 and the heat source temperature or flow of the heat source side of evaporator 5 are adjusted, section is set
Flow the aperture of valve B 8 and throttle valve A 4, the water-carrying capacity of control gas cooler 2 water side, to cause the water side of condenser 7 to enter water temperature
Spend and be heated to 50~60 DEG C for 10~30 DEG C of the condensed device 7 of cold water, be then heated to required 70~90 through gas cooler 2 again
DEG C heating water temperature.Therefore, 50~60 DEG C of hot water demand users 13,70-90 DEG C of circulating hot water demand user 10 can make respectively
With the hot water of different temperatures.Above-mentioned embodiment is accomplished that independent Trans-critical cycle CO2Heated type heat-production functions of circulation, but
By the optimization matched between each part in system of the present invention, can reach than independent CO2The higher heating circulation of system
Efficiency.
The second is realize the water side of gas cooler 2（That is the 70-90 DEG C of side of circulating hot water demand user 10）Inflow temperature and
Circulating heating condition requirement of the leaving water temperature all more than 70 DEG C：The first stop valve 71 is closed, the second stop valve 72 is opened, makes
70-90 DEG C of circulating hot water demand user 10 and hot water needed for 50~60 DEG C of hot water demand users 13 respectively by trans critical cycle
The gas cooler 2 in loop and the condenser 7 in subcritical cycle loop are produced, while adjust auxiliary evaporator 9 and the heat of evaporator 5
The heat source temperature or flow of source, the aperture of choke valve B8 and the throttle valve A 4 is set, controls gas cooler 2 and condenser
The water-carrying capacity of 7 water sides, to cause hot water that condenser 7 produces 50~60 DEG C so that it is 70 that gas cooler 2, which provides inflow temperature,
~80 DEG C, the circulating hot water that leaving water temperature is 70~90 DEG C, so as to realize the water side of condenser 7（I.e. 50~60 DEG C of hot water demands use
The side of family 13）Inflow temperature when being 10~30 DEG C, the condenser 7 in subcritical cycle loop produces 50~60 DEG C of hot water, and
The water side of gas cooler 2 in trans critical cycle loop（That is the 70-90 DEG C of side of circulating hot water demand user 10）Leaving water temperature is provided
For 70-90 DEG C, return water temperature is 70-80 DEG C of circulating hot water.
CO of the present invention2Heat pump can both meet the water side inflow temperature of condenser 7 when being 10-30 DEG C, while produce out
The heating condition of 50-60 DEG C of hot water water temperature requirements different with 70-90 DEG C two kinds, and can realize that the water inlet of gas cooler 2 is 70-
80 DEG C and the requirement of the circulation heating condition of 70-90 DEG C of leaving water temperature, in particular solve single-stage CO2System can not realize return water temperature
Circulating heating higher than 70 DEG C provides a kind of technical solution.
Although invention has been described for above content combination accompanying drawing, the present invention is not only limited to above-mentioned specific reality
Mode is applied, above-mentioned embodiment is only schematical, and nonrestrictive, comes for those skilled in the art
Say, it can still modify to the technical scheme of above-mentioned implementation example, thus it is all made under present inventive concept it is any
Modification, equivalents etc., are belonged within protection scope of the present invention.
Claims (6)
1. realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump, it is characterized in that：
The system be by using high temperature refrigerant as the subcritical cycle loop of refrigerant and with CO2Returned for the trans critical cycle of refrigerant
The heat pump that road is combined into；
Described trans critical cycle loop includes a compressor A being sequentially connected with（1）, a gas cooler（2）, one steam
Send out cooler（3）, a throttle valve A（4）With an evaporator（5）, the gas cooler（2）For being connected to 70~90 DEG C
Circulating hot water demand user（10）And high return water temperature, the evaporator are realized with 70~80 DEG C of return water temperature（5）With a heat
Source A（11）Connection, the devaporizer（3）For the auxiliary gas cooler in the trans critical cycle loop；
Described subcritical cycle loop includes a compressor B being sequentially connected with（6）, a condenser（7）, a choke valve
B（8）, an auxiliary evaporator（9）With described devaporizer（3）, the condenser（7）For being connected to 50~60 DEG C of heat
Water demand user（13）, the auxiliary evaporator with（9）One thermal source B（12）Connection, the devaporizer subcritical follow for this
The main evaporator of loop back path；
Described two kinds of heating conditions requirement：One is realize the condenser（7）The inflow temperature of water side is 10-30 DEG C, and
The gas cooler（2）The heating condition requirement that the leaving water temperature of water side is 70-90 DEG C, described condenser（7）Water side is
50~60 DEG C of hot water demand users（13）Side, described gas cooler（2）Water side is 70-90 DEG C of circulating hot water demand user
（10）Side；The second is realize gas cooler（2）Circulating system of the inflow temperature and leaving water temperature of water side all more than 70 DEG C
Thermal condition requirement, described gas cooler（2）Water side is 70-90 DEG C of circulating hot water demand user（10）Side.
2. the Trans-critical cycle CO according to claim 1 for realizing high return water temperature and two kinds of heating condition requirements2Heat pump system
System, it is characterized in that：The condenser（7）Water side water side and the gas cooler（2）The is provided between the inlet end of water side
One stop valve（71）, the condenser（7）Water side water side and 50~60 DEG C of hot water demand users（13）Between be provided with second section
Only valve（72）.
3. the Trans-critical cycle CO according to claim 1 for realizing high return water temperature and two kinds of heating condition requirements2Heat pump system
System, it is characterized in that：Described high temperature refrigerant is the refrigerant that can produce 50~60 DEG C of heating water temperatures.
4. the Trans-critical cycle CO according to claim 3 for realizing high return water temperature and two kinds of heating condition requirements2Heat pump system
System, it is characterized in that：Described high temperature refrigerant is any one of R134a, R404A, R407C, R410A and R507C.
A kind of 5. Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements as claimed in claim 22Heat pump system
The control method of system, it is characterized in that：Close second stop valve（72）, open first stop valve（71）, described in regulation
Auxiliary evaporator（9）With the evaporator（5）The heat source temperature or flow of heat source side, the choke valve B is set（8）With the section
Flow valve A（4）Aperture, control the gas cooler（2）The water-carrying capacity of water side, using by inflow temperature as 10~30 DEG C of cold water
Through the condenser（7）50~60 DEG C are heated to, then again through the gas cooler（2）70~90 DEG C of system needed for being heated to
Hot water temperature.
A kind of 6. Trans-critical cycle CO for realizing high return water temperature and two kinds of heating condition requirements as claimed in claim 22Heat pump system
The control method of system, it is characterized in that：Close first stop valve（71）, open second stop valve（72）, described in regulation
Auxiliary evaporator（9）With the evaporator（5）The heat source temperature or flow of heat source side, the choke valve B is set（8）With the section
Flow valve A（4）Aperture, control the gas cooler（2）With the condenser（7）The water-carrying capacity of water side, by inflow temperature
It is 10~30 DEG C of cold water through the condenser（7）Produce the hot water for 50~60 DEG C so that the gas cooler（2）There is provided
The circulating hot water that inflow temperature is 70~80 DEG C, leaving water temperature is 70~90 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681753.8A CN105180433B (en) | 2015-10-21 | 2015-10-21 | Realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510681753.8A CN105180433B (en) | 2015-10-21 | 2015-10-21 | Realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump and its control method |
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| Publication Number | Publication Date |
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| CN105180433A CN105180433A (en) | 2015-12-23 |
| CN105180433B true CN105180433B (en) | 2017-11-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107014098B (en) * | 2017-05-24 | 2023-06-02 | 江苏苏净集团有限公司 | Carbon dioxide heat pump heating system |
| CN111336707B (en) * | 2020-02-29 | 2021-09-03 | 同济大学 | Carbon dioxide heat pump heating system with topologic homoembryo circulation |
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| WO2000020809A1 (en) * | 1998-10-08 | 2000-04-13 | Hebert Thomas H | Building exhaust and air conditioner condensate |
| CN201141711Y (en) * | 2007-12-25 | 2008-10-29 | 天津商业大学 | Nature working medium refrigeration heat pump |
| CN201229082Y (en) * | 2008-06-03 | 2009-04-29 | 天津商业大学 | Supermarket refrigeration system with natural working substance |
| CN201233126Y (en) * | 2008-05-30 | 2009-05-06 | 天津商业大学 | CO2/NH3 combined cooling cycle system |
| CN203824164U (en) * | 2014-04-16 | 2014-09-10 | 中国铁道科学研究院节能环保劳卫研究所 | Overlapped type carbon dioxide air source heat pump |
| CN205037565U (en) * | 2015-10-21 | 2016-02-17 | 浙江佳力科技股份有限公司 | Realize high return water temperature and different critical CO2 heat pump system that strides who heats operating mode requirement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6285356B2 (en) * | 2012-07-06 | 2018-02-28 | 治彦 大田 | Boiling cooler |
-
2015
- 2015-10-21 CN CN201510681753.8A patent/CN105180433B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000020809A1 (en) * | 1998-10-08 | 2000-04-13 | Hebert Thomas H | Building exhaust and air conditioner condensate |
| CN201141711Y (en) * | 2007-12-25 | 2008-10-29 | 天津商业大学 | Nature working medium refrigeration heat pump |
| CN201233126Y (en) * | 2008-05-30 | 2009-05-06 | 天津商业大学 | CO2/NH3 combined cooling cycle system |
| CN201229082Y (en) * | 2008-06-03 | 2009-04-29 | 天津商业大学 | Supermarket refrigeration system with natural working substance |
| CN203824164U (en) * | 2014-04-16 | 2014-09-10 | 中国铁道科学研究院节能环保劳卫研究所 | Overlapped type carbon dioxide air source heat pump |
| CN205037565U (en) * | 2015-10-21 | 2016-02-17 | 浙江佳力科技股份有限公司 | Realize high return water temperature and different critical CO2 heat pump system that strides who heats operating mode requirement |
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