CN101008537A - Integrated air-conditioning system of solar-assisted soil source CO2 trans-critical heat pump - Google Patents

Integrated air-conditioning system of solar-assisted soil source CO2 trans-critical heat pump Download PDF

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Publication number
CN101008537A
CN101008537A CN 200710062609 CN200710062609A CN101008537A CN 101008537 A CN101008537 A CN 101008537A CN 200710062609 CN200710062609 CN 200710062609 CN 200710062609 A CN200710062609 A CN 200710062609A CN 101008537 A CN101008537 A CN 101008537A
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China
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valve
heat
conditioning
solar
trans
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CN 200710062609
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Chinese (zh)
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CN100451492C (en
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姜培学
孙兆虎
王国梁
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清华大学
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Abstract

The invention discloses a solar-energy soil ultra-critical carbon dioxide heat pump air-conditioning system. The invention comprises an ultra-critical carbon dioxide heat pump medium circulator, a solar-energy collector, an underground tube heat exchanger, and an indoor air-conditioning tube. The invention arranges heat exchange coil tube, evaporator/gas cooler in the heat accumulating box, via four-way valve and valves to connect them into one air-conditioning system. The invention can work in five modes as heating, refrigerating, heating water, heating-heating water, and refrigerating-heating water, to heat water, refrigerate and supply heat.

Description

The solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system

Technical field

The invention belongs to solar energy utilization and air-conditioning technical scope, particularly a kind of solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system.Be that solar thermal collection system is combined with the soil source CO 2 trans-critical heat pump air-conditioning system specifically, by the cooperation of solar thermal collection system, heat transfer system of underground heat exchanger and heat pump type air conditioning system, form heat, the integrated system of refrigeration and hot water tri-generation.

Background technology

Carbon dioxide is comparatively desirable cold-producing medium as a kind of natural material, that its advantage is is nontoxic, do not fire, have zero odp value, greenhouse effects very low, cheap, need not reclaim, environment is not had unpredictalbe side effect etc.As a hot research field on refrigeration circle, the research work of the critical-cross carbon dioxide refrigerated air-conditioning system whole world launches rapidly at present, and many researchers predict that carbon dioxide will be a cold-producing medium of future generation.In the critical-cross carbon dioxide circulation, the exothermic process of carbon dioxide carries out under supercritical pressure, therefore there is bigger temperature to fall after rise, this process is particularly suitable for heating the hot water of family expenses, and the carbon dioxide heat-pump water heater is the heat-pump water heater that generally acknowledged at present each side is better than conventional working medium such as R22, R134a.State scholars' such as Austria, Norway, Japan this heat pump hot-water system annual COP value that studies show that can reach more than 3, and 90 ℃ of hot water still can be provided under-20 ℃ of environment, with electrical heating or gas heater specific energy consumption reduction by 75% mutually.

Along with people to improving constantly that comfortableness requires, the energy consumption that is used for air conditioning and domestic hot-water constantly increases.And in the prior art, generally separate with the hot water supply system for the air handling system of small-sized family formula, have oneself independently circuit system separately.And the cycle of operation of the apparatus of air conditioning all has very big intermittence, has so just caused the idle of equipment, and cost is increased.For solar thermal collection system independently, be subjected to inside even from weather serious, exist very big intermittence and unstability; Be far longer than cooling time for independently soil source heat pump system, especially northern area heating time, can cause the reduction of the soil moisture, thereby the coefficient of performance can descend constantly.

Summary of the invention

The purpose of this invention is to provide a kind of solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system.

The technical solution used in the present invention, described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system comprise solar thermal collection system, heat transfer system of underground heat exchanger, CO 2 trans-critical heat pump air-conditioning system and room conditioning pipe-line system four parts.So-called critical-cross carbon dioxide circulation is meant that carbon dioxide absorbs heat in evaporimeter under the condition of subcritical pressure, and (rather than " condenser " in the conventional compression refrigerating system) heat release in cooler under the supercritical pressure condition.

Described solar thermal collection system is that solar thermal collector 9 both sides are connected to hot water storage tank 11 by valve 13 and valve 12, water pump 10 respectively; Open compressor 1, cross valve 2 and 4 switches respectively, enters the heat pump heating mode.

Described soil source circuit system adopts heat transfer system of underground heat exchanger that low level heat energy is provided, the underground buried tube pipe laying depth is generally more than 5 meters, the left side one tunnel, valve 18 and the valve 19 of valve 16, pump 15, valve 17, first evaporator 3 of leading up to of underground heat exchanger 14 connects into the loop, and valve 25 is connected in parallel on the two ends of the series loop of valve 16, underground heat exchanger 14, valve 19; Valve 17 two ends are connected with the water tank heat exchange coil 20 in the hot water storage tank 11 by valve 21, valve 22 and valve 24, valve 23 respectively.Water tank heat exchange coil 20 1 ends are connected with the node of valve 27, valve 33 by valve 22, valve 26, water tank heat exchange coil 20 other ends are connected with the right one road of second evaporator 7 and the node of valve 30 by valve 23, valve 32, and valve 33 is connected respectively to the right one road and the indoor fan coil system 28 of second evaporator 7 by interconnective pump 29, valve 31; Indoor fan coil system 28 is connected with valve 30 again;

Described CO 2 trans-critical heat pump air-conditioning system is connected into the loop by compressor 1, cross valve 2, fluid reservoir 4, internal exchanger 5, and the left side one tunnel and the cross valve 2 of the right one tunnel by cross valve 2, first evaporator 3, cross valve 4, second evaporator 7 connect into the loop; Wherein internal exchanger 5 also and cross valve 4, valve 6 composition loops.

Described heat pump type air conditioning system adopts critical carbon dioxide as working medium, and corresponding critical piece and pipe-line system should satisfy the requirement of withstand voltage of 15MPa.

The water loop system and the refrigeration system of described solar thermal collector can be separate.

Described hot water storage tank 11 inner water-tank heat exchange coils 20 both can be used as the hot water storage tank that the domestic hot-water is provided, and can be used as the low level heat energy that heat is provided again.

The described low level heat energy that heat is provided (if simple soil source as low level heat energy, temperature is greatly between 5-20 ℃) adopts independent hot water storage tank loop or soil source and hot water storage tank series loop.

The invention has the beneficial effects as follows solar thermal collection system, heat transfer system of underground heat exchanger, CO 2 trans-critical heat pump air-conditioning system are closely cooperated, heat, freeze, heat to adapt to the spring, summer, autumn and winter Various Seasonal+hot water, different demands such as refrigeration+hot water, hot water, reach facility compact, complete function, the requirement of energy efficient.

The present invention at first adopts this green working medium of carbon dioxide, and next adopts solar thermal collection system, has utilized reproducible solar energy, has the advantage of energy-conserving and environment-protective.Adopt soil as low level heat energy once more, improved the coefficient of performance, and " urban heat land effect " of having avoided employing air heat transmission equipment to bring.

Description of drawings

Fig. 1 is a solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system structural representation.

Among the figure: the 1-compressor; 2, the 4-cross valve; 3-first evaporator; 7-second evaporator; The 5-internal exchanger; The 6-choke valve; The 8-fluid reservoir; The 9-heat collector; 10,15, the 29-water pump; The 11-hot water storage tank; The 14-underground heat exchanger; 20-water tank heat exchange coil; 28 fan coil systems; All the other are two-way valve.

The specific embodiment

This system by the cooperation of solar thermal collection system, underground buried tube system and heat pump type air conditioning system, can reach the three kinds of functions that heat water, heat and freeze under different weather conditions.Generally speaking, there are 5 kinds of mode of operations in this system, is respectively: (1) hot water operating mode; (2) heating condition; (3) heat+the hot water operating mode; (4) cooling condition; (5) refrigeration+hot water operating mode.Introduced respectively below:

(1) hot water operating mode

A) under the enough situation of intensity of illumination, need not open heat pump, by the solar energy heating water loop system that solar thermal collector 9, valve 13, hot water storage tank, water pump 10 and valve 12 are formed, can directly reach predetermined temperature is the bathing temperature, and scope is greatly between 30-60 ℃.

B) when intensity of illumination is not enough, open compressor, cross valve 2 and 4 switches respectively, enters the heat pump heating mode.Low level heat energy adopts soil source, greatly between 5-20 ℃; Circuit system is made up of underground heat exchanger 14, valve 16, pump 15, valve 17, evaporimeter 3, valve 18 and valve 19.Water tank heating system loop is made up of cooler 7, pump 29, valve 33, valve 26, valve 22, water tank heat exchange coil 20, valve 23 and valve 32.

(2) heating condition

At first, start the heat pump heating mode.The loop, hot junction is made up of fan coil system 28, valve 30, cooler 7, pump 29 and valve 31.And the low level heat energy loop is divided into following two kinds of situations:

A) when water tank temperature close with the soil source temperature, can alternately utilize solar heat-preservation water tank thermal source and soil heat source.The soil source loop is made up of underground heat exchanger 14, valve 16, pump 15, valve 17, evaporimeter 3, valve 18 and valve 19, and the hot water storage tank loop is made up of water tank heat exchange coil 20, valve 23, valve 24, evaporimeter 3, valve 18, valve 25, pump 15, valve 21 and valve 22.

B) be higher than the soil source temperature when water tank temperature, soil heat source and two kinds of low level heat energies of solar heat-preservation water tank simultaneously, thus further improve the low level heat energy temperature.Mixing low temp thermal source loop is formed by burying ground heat exchanger 14, valve 16, pump 15, valve 21, valve 22, water tank heat exchange coil 20, valve 23, valve 24, evaporimeter 3, valve 18 and valve 19.

(3) cooling condition

A) when cooling load less, can not start compressor, only utilize the cold of soil source, carry out the water route circulation at underground heat exchanger and fan coil system, closed circuit is made up of underground heat exchanger 14, valve 16, pump 15, valve 17, valve 24, valve 32, valve 30, fan coil system 28, valve 31, valve 33, valve 27 and valve 19.

B) when cooling load is big, start compressor, cross valve 2 and 4 switches respectively, enters refrigeration mode.At this moment, low level heat energy is a fan coil system, and the loop is made up of fan coil system 28, valve 30, evaporimeter 7, pump 29 and valve 31.With heat absorption, heat-radiation loop is made up of underground heat exchanger 14, valve 16, pump 15, valve 17, cooler 3, valve 18 and valve 19 by soil source in the hot junction.

(4) heat+the hot water operating mode

A) when solar thermal collection system can provide enough domestic hot-waters, can adopt independent hot water storage tank loop or soil source and hot water storage tank series loop with reference to low level heat energy in above-mentioned the 2nd kind of heating condition.

B) when solar thermal collection system can not provide enough domestic hot-waters, temporarily the heat supplying loop that fan coil system 28, valve 30, evaporimeter 7, pump 29 and valve 31 are formed switches to the water tank heating circuit that cooler 7, pump 29, valve 33, valve 26, valve 22, water tank heat exchange coil 20, valve 23 and valve 32 are formed.When water tank temperature arrives assigned temperature, switching back.

(5) refrigeration+hot water operating mode

A) when solar thermal collection system can provide enough domestic hot-waters, can be separate by the water loop system and the refrigeration system of solar thermal collector.Refrigeration system is with reference to above-mentioned the 3rd kind of cooling condition operation.

B) when solar thermal collection system can not provide enough domestic hot-waters, the heat-radiation loop that temporarily will bury ground heat exchanger 14, valve 16, pump 15, valve 17, evaporimeter 3, valve 18 and valve 19 compositions switches to water tank heat exchange coil 20, valve 23, valve 24, evaporimeter 3, valve 18, valve 25, pump 15, valve 21 and valve 22 and forms the water tank heating circuits.

Claims (5)

1. solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system, described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system comprises solar thermal collection system, heat transfer system of underground heat exchanger, CO 2 trans-critical heat pump air-conditioning system and room conditioning pipe-line system four parts, it is characterized in that
Described solar thermal collection system on the both sides of solar thermal collector (9) respectively by valve (13) and valve (12, water pump (10) is connected to hot water storage tank (11);
Described soil source circuit system adopts heat transfer system of underground heat exchanger that low level heat energy is provided, the left side one tunnel, valve (18) and the valve (19) of valve (16), pump (15), valve (17), first evaporator (3) of leading up to of underground heat exchanger (14) connects into the loop, and valve (25) is connected in parallel on the two ends of the series loop of valve (16), underground heat exchanger (14), valve (19); Valve (17) two ends are respectively by valve (21), valve (22 and valve (24), water tank heat exchange coil (20) in the same hot water storage tank of valve (23) (11) connects, water tank heat exchange coil (20) one ends are by valve (22), valve (26) and valve (27), the node of valve (33) connects, water tank heat exchange coil (20) other end is by valve (23), valve (32) is connected with the right one road of second evaporator (7) and the node of valve (30), and valve (33) is by interconnective pump (29), valve (31) is connected respectively to the right one road and the indoor fan coil system (28) of second evaporator (7); Indoor fan coil system (28) is connected with valve (30) again;
The compressor of described CO 2 trans-critical heat pump air-conditioning system (1), cross valve (2), fluid reservoir (4), internal exchanger (5) are connected into the loop, open the right one tunnel, the cross valve (4) of cross valve (2), first evaporator (3), the left side one tunnel and the cross valve (2) of second evaporator (7) connects into the loop; Wherein internal exchanger (5) also and cross valve (4), valve (6) composition loop.
2. according to the described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system of claim 1, it is characterized in that, described CO 2 trans-critical heat pump air-conditioning system adopts critical carbon dioxide as working medium, and corresponding critical piece and pipe-line system should satisfy the requirement of withstand voltage of 15MPa.
3. according to the described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system of claim 1, it is characterized in that the water loop system and the refrigeration system of described solar thermal collector can be separate.
4. according to the described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system of claim 1, it is characterized in that, described hot water storage tank (11) inner water-tank heat exchange coil (20) both can be used as the hot water storage tank that the domestic hot-water is provided, and can be used as the low level heat energy that heat is provided again.
5. according to the described solar-assisted soil source CO 2 trans-critical heat pump integrated air-conditioning system of claim 4, it is characterized in that the described middle low level heat energy of heat that provides adopts independent hot water storage tank loop or soil source and hot water storage tank series loop.
CNB2007100626091A 2007-01-11 2007-01-11 Integrated air-conditioning system of solar-assisted soil source CO2 trans-critical heat pump CN100451492C (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
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CN101280962B (en) * 2008-04-16 2010-06-09 张信荣 Solar energy or exhaust heat energy supply system based on supercritical carbon dioxide cycle utilization
CN101915433A (en) * 2010-08-26 2010-12-15 苏宇贵 Kitchen flue gas heat-recovering device and kitchen flue gas heat-recovering fresh air system
CN101936624A (en) * 2010-10-18 2011-01-05 郑州中南科莱空调设备有限公司 Capillary network heat pump system utilizing solar energy
CN102003833A (en) * 2010-10-27 2011-04-06 华北电力大学(保定) Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat
CN102003838A (en) * 2010-11-16 2011-04-06 刘秋克 Solar-powered primary source heat source tower heat pump complete device
CN102245978A (en) * 2008-12-11 2011-11-16 学校法人同志社 Heat collecting method and heat collecting device for solar heat
CN102331111A (en) * 2011-09-08 2012-01-25 山东宏力空调设备有限公司 Integrated cold and hot power device of seawater-source heat pump
CN102679565A (en) * 2011-12-25 2012-09-19 河南科技大学 Device for obtaining high-temperature water by utilizing solar energy and air energy
CN102679619A (en) * 2011-03-09 2012-09-19 北京建筑工程学院 Solar heat storage-ground source heat pump integrated system based on rainwater storage/infiltration
CN103032995A (en) * 2012-12-27 2013-04-10 东北大学 Heat accumulation type multi-heat-source heat pump set
CN103615293A (en) * 2013-10-29 2014-03-05 大连葆光节能空调设备厂 Carbon dioxide heat pump and organic working medium combined power generation system
CN103925735A (en) * 2014-03-28 2014-07-16 山东中瑞新能源科技有限公司 System and method for coupling passive space radiation refrigeration with buried-pipe ground-source heat pump
CN104792067A (en) * 2015-04-15 2015-07-22 常州海卡太阳能热泵有限公司 Ground-source solar heat pump heat supplying system for greenhouse and control method of heat supplying system
CN106288516A (en) * 2016-09-30 2017-01-04 厦门工源环保科技有限公司 A kind of MW class carbon dioxide heat pump system
CN106382767A (en) * 2016-08-30 2017-02-08 湖南中大经纬地热开发科技有限公司 Comprehensive utilization system for terrestrial heat of underground water-lacked region
CN106403376A (en) * 2016-09-30 2017-02-15 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to field of geothermy
CN106546035A (en) * 2016-09-30 2017-03-29 厦门工源环保科技有限公司 A kind of MW class carbon dioxide heat pump system applied in sewage remaining energy recovery field
CN106568234A (en) * 2016-09-30 2017-04-19 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to community system by using solar energy
CN106568235A (en) * 2016-09-30 2017-04-19 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to industrial field

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CN1391074A (en) * 2002-04-24 2003-01-15 郑茂余 Method and equipment for using solar energy to accumulate heat and provide heat or cold
CN1209588C (en) * 2002-08-08 2005-07-06 天津大学 Heating system of solar energy heat pump in type of accumulating heat by soil as well as method for supplying heat
CN2748843Y (en) * 2003-10-11 2005-12-28 广西大学 Solar energy and ground-source heat pump air conditioning and water heating apparatus
CN1869555A (en) * 2006-03-28 2006-11-29 王全龄 Heat pump air conditioner of air source, solar, water source

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101280962B (en) * 2008-04-16 2010-06-09 张信荣 Solar energy or exhaust heat energy supply system based on supercritical carbon dioxide cycle utilization
CN102245978A (en) * 2008-12-11 2011-11-16 学校法人同志社 Heat collecting method and heat collecting device for solar heat
CN101915433A (en) * 2010-08-26 2010-12-15 苏宇贵 Kitchen flue gas heat-recovering device and kitchen flue gas heat-recovering fresh air system
CN101936624B (en) * 2010-10-18 2011-11-30 郑州中南科莱空调设备有限公司 Capillary network heat pump system utilizing solar energy
CN101936624A (en) * 2010-10-18 2011-01-05 郑州中南科莱空调设备有限公司 Capillary network heat pump system utilizing solar energy
CN102003833A (en) * 2010-10-27 2011-04-06 华北电力大学(保定) Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat
CN102003833B (en) * 2010-10-27 2012-10-31 华北电力大学(保定) Transcritical carbon dioxide heat pump type air conditioning water heater using condensation residual heat
CN102003838A (en) * 2010-11-16 2011-04-06 刘秋克 Solar-powered primary source heat source tower heat pump complete device
CN102679619B (en) * 2011-03-09 2014-06-11 北京建筑工程学院 Solar heat storage-ground source heat pump integrated system based on rainwater storage/infiltration
CN102679619A (en) * 2011-03-09 2012-09-19 北京建筑工程学院 Solar heat storage-ground source heat pump integrated system based on rainwater storage/infiltration
CN102331111A (en) * 2011-09-08 2012-01-25 山东宏力空调设备有限公司 Integrated cold and hot power device of seawater-source heat pump
CN102679565B (en) * 2011-12-25 2013-12-18 河南科技大学 Device for obtaining high-temperature water by utilizing solar energy and air energy
CN102679565A (en) * 2011-12-25 2012-09-19 河南科技大学 Device for obtaining high-temperature water by utilizing solar energy and air energy
CN103032995A (en) * 2012-12-27 2013-04-10 东北大学 Heat accumulation type multi-heat-source heat pump set
CN103615293B (en) * 2013-10-29 2015-06-10 大连葆光节能空调设备厂 Carbon dioxide heat pump and organic working medium combined power generation system
CN103615293A (en) * 2013-10-29 2014-03-05 大连葆光节能空调设备厂 Carbon dioxide heat pump and organic working medium combined power generation system
CN103925735A (en) * 2014-03-28 2014-07-16 山东中瑞新能源科技有限公司 System and method for coupling passive space radiation refrigeration with buried-pipe ground-source heat pump
CN103925735B (en) * 2014-03-28 2016-07-06 山东中瑞新能源科技有限公司 The buried pipe ground-source heat pump system of coupling passive type irradiation space refrigeration and method
CN104792067A (en) * 2015-04-15 2015-07-22 常州海卡太阳能热泵有限公司 Ground-source solar heat pump heat supplying system for greenhouse and control method of heat supplying system
CN104792067B (en) * 2015-04-15 2017-09-12 常州海卡太阳能热泵有限公司 Soil source solar heat pump warmhouse booth heating system and control method
CN106382767A (en) * 2016-08-30 2017-02-08 湖南中大经纬地热开发科技有限公司 Comprehensive utilization system for terrestrial heat of underground water-lacked region
CN106382767B (en) * 2016-08-30 2019-03-19 湖南中大经纬地热开发科技有限公司 The underground heat utilization system in the poor region of groundwater run off
CN106403376A (en) * 2016-09-30 2017-02-15 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to field of geothermy
CN106546035A (en) * 2016-09-30 2017-03-29 厦门工源环保科技有限公司 A kind of MW class carbon dioxide heat pump system applied in sewage remaining energy recovery field
CN106568234A (en) * 2016-09-30 2017-04-19 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to community system by using solar energy
CN106568235A (en) * 2016-09-30 2017-04-19 厦门工源环保科技有限公司 Megawatt-level carbon dioxide heat pump system applied to industrial field
CN106288516A (en) * 2016-09-30 2017-01-04 厦门工源环保科技有限公司 A kind of MW class carbon dioxide heat pump system

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