CN101236032A - Heat pump type heat exchanging unit - Google Patents

Heat pump type heat exchanging unit Download PDF

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Publication number
CN101236032A
CN101236032A CNA2008101010645A CN200810101064A CN101236032A CN 101236032 A CN101236032 A CN 101236032A CN A2008101010645 A CNA2008101010645 A CN A2008101010645A CN 200810101064 A CN200810101064 A CN 200810101064A CN 101236032 A CN101236032 A CN 101236032A
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China
Prior art keywords
water
heat
heat pump
heat exchanger
absorption
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Granted
Application number
CNA2008101010645A
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Chinese (zh)
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CN100470167C (en
Inventor
付林
江亿
张世钢
肖常磊
胡鹏
狄洪发
陈闯
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Beijing Qingjian Energy Technology Co ltd
Beijing Thupdi Planning Design Institute Co ltd
Original Assignee
BEIJING HUANNENG RUITONG TECHNOLOGY DEVELOPMENT Co Ltd
Tsinghua University
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Application filed by BEIJING HUANNENG RUITONG TECHNOLOGY DEVELOPMENT Co Ltd, Tsinghua University filed Critical BEIJING HUANNENG RUITONG TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CNB2008101010645A priority Critical patent/CN100470167C/en
Publication of CN101236032A publication Critical patent/CN101236032A/en
Priority to JP2010520406A priority patent/JP5194122B2/en
Priority to PCT/CN2008/001604 priority patent/WO2009105929A1/en
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Publication of CN100470167C publication Critical patent/CN100470167C/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • 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]
    • Y02B30/12—Hot water central heating systems using heat pumps

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

The invention relates to a heat pump type heat exchange units, which belongs to the technical field of energy. The units are composed of hot water type absorption heat pump units, a water-water heat exchanger, various connecting pipelines and accessories, wherein a water flow system of the connecting pipelines is divided into a primary side pipeline and a secondary side pipeline, the primary side pipeline employs a manner of a step sequence series connection, hot water of the primary side pipeline sequentially passes through a generator of an absorption heat pump, the water-water heat exchanger and an evaporator of the absorption heat pump, hot water of the secondary side pipeline passes through an absorption device and a condenser of the absorption heat pump and the water-water heat exchanger, because the primary side pipeline of the heat exchange units sequentially passes through the generator of the absorption heat pump, the water-water heat exchanger and the evaporator of the absorption heat pump, energy of hot water is used step by step, thereby greatly increasing differential temperature between water supply and water return of primary side hot water. Additionally, outlet water temperature of primary side heat exchange units is commonly lower than that of secondary side inlet water, which can not be realized by conventional heat exchanger.

Description

A kind of heat pump type heat exchanging unit
Technical field
The present invention relates to a kind of heat exchange unit that is used for heating, heat supply water, particularly relate to a kind of heat-exchanger rig that once net hot water confession of central heating system, backwater temperature difference are significantly increased, belong to energy technology field.
Background technology
Continuous increase along with the concentrated supply of heating in the city scale, central heat source produces high-temperature-hot-water often to be needed could arrive hot user place through the conveying of longer distance, under the situation of identical heating demand, increase the confession of hot water, the hot water flow that backwater temperature difference can reduce conveying, thereby reduce the initial cost of transmission and distribution pipeline, and reduce the power consumption of water pump in system's running, therefore, can save the heat supply energy consumption, reduce heat cost.At present, central heating once confession, the return water temperature of net hot water is generally about 130～60 ℃, and wherein, return water temperature is subjected to the restriction that the user locates to use heat request, utilizes conventional heat exchanger can't reduce again.Therefore, the return water temperature that how further to reduce high-temperature-hot-water with further increase its for, backwater temperature difference, will save the heat supply energy consumption to enlarging the heat range of heat of central heat source, reduce heat cost and produce profound significance.
Summary of the invention
According to the problems referred to above, the invention provides a kind of energy and carry out cascade utilization central heating hot water, reduce heat exchange unit primary side leaving water temperature significantly, and then significantly increase it, and can produce the heating of satisfying instructions for use or domestic hot-water's heat exchange unit at user side for, backwater temperature difference.
As shown in Figure 1, technical scheme of the present invention is the heat exchange unit that adopts hot-water type absorption heat pump 1 and water-water-to-water heat exchanger 2 to combine, and promptly unit is made up of hot-water type absorption heat pump 1, water-water-to-water heat exchanger 2 and various connecting line and annex.The water circuit system of unit is divided into primary side pipeline and secondary side (user side) pipeline two parts, the primary side pipeline adopts the mode of order serial connection step by step, and once net hot water passes through the evaporimeter of generator, water-water-to-water heat exchanger 2 and the absorption type heat pump assembly 1 of absorption type heat pump assembly 1 successively; The mode that the secondary side pipeline adopts two-way to be connected in parallel, one tunnel absorber and condenser heat absorption through source pump 1 heats up, and another road is heated through water-water-to-water heat exchanger 2.Specifically: for the primary side water circuit system, primary side hot water at first enters the generator of absorption heat pump 1 as driving heat source, heating concentrates lithium-bromide solution, the cooling back is flowed out from the heat pump generator and is entered water-water-to-water heat exchanger 2 high temperature sides as the heating thermal source, the hot water backwater of heating low temperature side, the back evaporimeter that enters absorption heat pump 1 again from heat exchanger 2 outflows of cooling is sent central heat source as low level heat energy back to after the heat release cooling; For the secondary side water circuit system, absorber and condenser heat absorption that secondary net hot water backwater one tunnel enters absorption heat pump 1 heat up, another road enters the low temperature side of water-water-to-water heat exchanger 2, carries out heat exchange with high temperature side hot water and heats up, and the hot water after the intensification flows out unit and returns the user place.
Needs according to different user, heat pump type heat exchanging unit secondary side pipe network of the present invention can have three kinds of connected modes: first kind of connected mode as shown in Figure 1, the secondary net hot water of two kinds of parameters of unit output, i.e. secondary net hot water parameter by absorption heat pump 1 and can be inequality by the secondary net hot water parameter of water-water-to-water heat exchanger 2, the secondary net system by separately is transported to different hot users respectively; Second kind of connected mode as shown in Figure 2, the secondary side pipeline adopts mode in parallel, after promptly secondary net hot water backwater divides two-way to enter absorption heat pump and water-water-to-water heat exchanger heat temperature raising respectively, converges to a place again and is transported to the user; The third connected mode as shown in Figure 3, the secondary side pipeline adopts the mode of series connection, promptly secondary net hot water backwater is introduced into the absorption heat pump heat absorption and heats up, and enters water-water-to-water heat exchanger heat temperature raising again, and then is transported to the user.
Biggest advantage of the present invention be exactly by a relatively large margin increase confession, the backwater temperature difference of central heating system primary side hot water, reduce the heat supply network return water temperature significantly, even significantly be lower than the secondary side inflow temperature, thereby can significantly reduce the initial cost and the water pump operation power consumption of pipe-line system, created condition for utilizing thermal source low grade heat energy even used heat waste heat etc., thereby improve the system synthesis efficiency of energy utilization, reduce heat cost.
Description of drawings
Fig. 1 is the schematic flow sheet of first kind of connected mode of the present invention;
Fig. 2 is the schematic flow sheet of second kind of connected mode of the present invention;
Fig. 3 is the schematic flow sheet of the third connected mode of the present invention;
Flow process that Fig. 4 uses in certain central heating system for the present invention and parameter schematic diagram.
Symbol among the figure:
1-hot-water type absorption type heat pump assembly; 2-water-water-to-water heat exchanger; 2a-one-level water-water-to-water heat exchanger; 2b-secondary water-water-to-water heat exchanger.
The specific embodiment
According to the requirement of the actual heating parameter of certain central heating system, the specific embodiment of the present invention is described below.
Embodiment 1: as shown in Figure 4, this unit is made up of hot-water type absorption heat pump and water-water-to-water heat exchanger and connecting line annex, and water circuit system is divided into primary side hot water line and secondary side hot water line two parts.In the actual motion, the hot water that high temperature side is 130 ℃ at first enters hot water absorption type heat pump assembly 1 as drive energy, heating concentrates lithium-bromide solution in its generator, from hot water absorption heat pump 1, flow out when being cooled to 90 ℃ of left and right sides, 90 ℃ hot water enters water-water-to-water heat exchanger 2 as the heating thermal source, heating secondary net hot water backwater, from water-water-to-water heat exchanger 2, flow out when being cooled to 50 ℃, 50 ℃ hot water returns hot-water type absorption heat pump 1 again as low level heat energy, in its evaporimeter, be cooled to back outflow about 25 ℃, return central heat source, so circulation; The hot water backwater that the secondary net is 45 ℃ is divided into two-way and enters unit, one the tunnel enters hot-water type absorption heat pump 1, in its absorber and condenser, absorb heat, be heated to back outflow about 60 ℃, another road enters water-water-to-water heat exchanger 2, carry out heat exchange with net hot water once, flow out after being heated to 60 ℃, be sent to hot user after the hot water effluent that two-way is 60 ℃ converges.As can be seen, this unit adopts the mode of heat pump-heat exchanger combination can effectively carry out the cascade utilization of high-temperature-hot-water, has realized 105 ℃ supply backwater temperature difference, and can produce heating or the domestic hot-water who satisfies instructions for use.This device generally is installed in each thermal substation of large-scale centralized heating system.
Embodiment 2: two-stage water-water-to-water heat exchanger series system heat pump heat exchange unit.As shown in Figure 5, this unit is made up of hot-water type absorption heat pump, one-level water-water-to-water heat exchanger, secondary water-water-to-water heat exchanger and connecting line annex, and water circuit system is divided into primary side hot water line and secondary side hot water line two parts.In the actual motion, the hot water that high temperature side is 130 ℃ at first enters hot water absorption type heat pump assembly 1 as drive energy, heating concentrates lithium-bromide solution in its generator, from hot water absorption heat pump 1, flow out when being cooled to 90 ℃ of left and right sides, 90 ℃ hot water enters secondary water-water-to-water heat exchanger 2b as the heating thermal source, heating secondary net hot water, flow out when being cooled to 65 ℃, enter one-level water-water-to-water heat exchanger 2a again and add secondary net hot water, flow out after being cooled to 50 ℃, 50 ℃ hot water returns hot-water type absorption heat pump 1 again as low level heat energy, is cooled to back outflow about 25 ℃ in its evaporimeter, return central heat source, so circulation; The hot water backwater that the secondary net is 45 ℃ is divided into two-way and enters hot-water type absorption heat pump 1 and one-level water-water-to-water heat exchanger 2a respectively, flow out after being heated to 60 ℃ respectively, 60 ℃ of hot water of two-way merge together, and enter among secondary water-water-to-water heat exchanger 2b, are sent to hot user after being heated to 67 ℃.As can be seen, this unit adopts the mode of heat pump-two-stage heat exchanger combination can effectively carry out the cascade utilization of high-temperature-hot-water, has realized 105 ℃ supply backwater temperature difference, and can produce higher heating of quality or domestic hot-water.This device generally is installed in each thermal substation of large-scale centralized heating system, the terminal radiator form that adopts of heating.

Claims (5)

1, a kind of heat pump type heat exchanging unit is characterized in that, described unit is made up of hot-water type absorption type heat pump assembly (1), water-water-to-water heat exchanger (2) and various connecting line and annex; The water circuit system of connecting line is divided into primary side pipeline and secondary side pipeline two parts in the described unit, the primary side pipeline adopts the mode of order serial connection step by step, and primary side pipeline hot water passes through generator, the water-water-to-water heat exchanger of absorption heat pump, the evaporimeter of absorption heat pump successively; Secondary side pipeline hot water is through absorber and the condenser and the water-water-to-water heat exchanger of absorption heat pump;
2, a kind of heat pump type heat exchanging unit according to claim 1, it is characterized in that: for the primary side water circuit system, central heating system once net hot water at first enters the generator of absorption heat pump as driving heat source, heating concentrates lithium-bromide solution, the cooling back is flowed out from the heat pump generator and is entered water-water-to-water heat exchanger as the heating thermal source, the hot water backwater of heating low temperature side, cooling back is flowed out from water-water-to-water heat exchanger and is entered the low level heat energy of the evaporimeter of absorption heat pump as heat pump again, and heat release cooling back is sent central heat source back to by net return pipe once; For the secondary side water circuit system, flow out unit after secondary net hot water backwater is absorbed heat and heated up and return the user place in absorber, condenser and the water-water-to-water heat exchanger of absorption heat pump.
3, a kind of heat pump type heat exchanging unit according to claim 1, it is characterized in that: described secondary side pipeline adopts mode in parallel, be after secondary net hot water backwater divides two-way to enter absorption heat pump and water-water-to-water heat exchanger heat temperature raising respectively, to converge to a place again and be transported to the user.
4, a kind of heat pump type heat exchanging unit according to claim 1, it is characterized in that: described secondary side pipeline adopts the mode of series connection, be that secondary net hot water backwater is introduced into absorption heat pump heat absorption intensification, enter water-water-to-water heat exchanger heat temperature raising again, and then be transported to the user.
5, a kind of heat pump type heat exchanging unit according to claim 1, it is characterized in that: described unit adopts the mode of two-stage water-water-to-water heat exchanger, once net hot water enters two-stage heat exchanger heat release cooling respectively, secondary net hot water enters absorption heat pump at first respectively and one-level water-water-to-water heat exchanger (2a) is heated, enter again in secondary water-water-to-water heat exchanger (2b) and be heated, be transported to hot user then.
CNB2008101010645A 2008-02-28 2008-02-28 Heat pump type heat exchanging unit Active CN100470167C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CNB2008101010645A CN100470167C (en) 2008-02-28 2008-02-28 Heat pump type heat exchanging unit
JP2010520406A JP5194122B2 (en) 2008-02-28 2008-09-11 Heat exchanger for heat supply
PCT/CN2008/001604 WO2009105929A1 (en) 2008-02-28 2008-09-11 Heat exchanging device for heat supply

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Application Number Priority Date Filing Date Title
CNB2008101010645A CN100470167C (en) 2008-02-28 2008-02-28 Heat pump type heat exchanging unit

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WO2009105929A1 (en) * 2008-02-28 2009-09-03 清华大学 Heat exchanging device for heat supply
CN101799189A (en) * 2010-04-06 2010-08-11 天津艾耐尔热能设备有限公司 Water-mixing regulating method and device of secondary network system of heat exchange unit
CN102022145A (en) * 2010-11-18 2011-04-20 清华大学 Steam exhaust waste heat recovery unit
CN102297467A (en) * 2011-08-19 2011-12-28 清华大学 Centralized heat supply system for low-temperature backwater
CN102519163A (en) * 2011-10-28 2012-06-27 李华玉 Third-class absorption type heat pump with afterheat double-effect driving
CN101929759B (en) * 2009-06-25 2013-08-21 清华大学 Absorption heating and refrigerating all-in-one machine taking high-temperature gas as heat source
CN101943470B (en) * 2009-07-09 2013-12-04 清华大学 Novel absorption gas-water heat exchange unit
CN103512075A (en) * 2013-09-25 2014-01-15 清华大学 Absorption heat exchanger unit combined with boiler
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CN105180501A (en) * 2015-09-07 2015-12-23 哈尔滨工业大学 Lithium bromide absorption type heat exchange unit with externally-cooled solution
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CN103822284A (en) * 2014-02-28 2014-05-28 烟台荏原空调设备有限公司 Adsorption type heat exchanger unit
CN103868129A (en) * 2014-03-01 2014-06-18 双良节能系统股份有限公司 Lithium bromide absorption heat exchange system capable of simultaneously providing two loops of hot water
CN103868129B (en) * 2014-03-01 2016-06-29 双良节能系统股份有限公司 The suction-type lithium bromide heat-exchange system of two-way hot water is provided simultaneously
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CN105180501B (en) * 2015-09-07 2019-03-12 哈尔滨工业大学 A kind of suction-type lithium bromide heat-exchange unit that solution outside is cooling
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