CN1389689A - Peak-regulating ground source heat pump system for accumulating energy with valley power - Google Patents

Peak-regulating ground source heat pump system for accumulating energy with valley power Download PDF

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Publication number
CN1389689A
CN1389689A CN01118555.4A CN01118555A CN1389689A CN 1389689 A CN1389689 A CN 1389689A CN 01118555 A CN01118555 A CN 01118555A CN 1389689 A CN1389689 A CN 1389689A
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China
Prior art keywords
peak
heat exchange
underground
condenser
heat pump
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Pending
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CN01118555.4A
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Chinese (zh)
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徐云生
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Individual
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Priority to CN01118555.4A priority Critical patent/CN1389689A/en
Priority to US10/159,654 priority patent/US20030221436A1/en
Publication of CN1389689A publication Critical patent/CN1389689A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/004—Outdoor unit with water as a heat sink or heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/008—Refrigerant heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0254—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements
    • F25B2313/02541—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements during cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0254—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements
    • F25B2313/02543—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements during heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/04—Desuperheaters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

A soil-source heat pump system comprises compressor, electric or hand-driven four-way valve, condenser, expansion valve, evaporator, cooling tower, closed underground heat exchange unit, indoor unit, electric four-way valve for switching the circulating water circuit, circulating water pump, temperature sensor and control unit. The underground heat exchange unit can be connected to the condenser through the switching of the four-way valve to be used as the radiating unit for refrigeration in the summer, which is also can be connected to the evaporator when the electirc power in valley time period to reduce the soil temperature and accumulate cold. Said invention has the advantages of low operation cost, high stability and saved space.

Description

Utilize the peak-regulating ground source heat pump system of valley power accumulation of energy
The present invention relates to a kind of peak-regulating ground source heat pump system that on the electric power low ebb time period, utilizes the underground unit accumulation of energy, belong to mechanical heating (F24) and refrigeration plant (F25) field.
Earth-source hot-pump system has utilized the stable of subsurface temperature, has reached a machine both cooling and heating and an aim of stable operation, need not defrosting and auxiliary thermal source.Simultaneously, owing to reduced the condensation evaporation temperature difference, saved the energy in a large number.Because system operates in below the good operating mode, equipment life is long, seldom needs to safeguard.Earth source heat pump has been saved space at most of occasion replacing fuel boiler fully, has reduced administrative expenses, has greatly alleviated the pollution of fuel heating to urban environment.But then, owing to relate to the construction of bigger underground system, system's up-front investment increases.
The nearly all grid power of world wide all faces the electric power imbalance, the great problem of electricity using at the peak time difference.In China, the air-conditioning of fast development is the key factor that causes this situation.In some city, air conditioning electricity has accounted for more than 50% of total electricity consumption in the building.Each electrical network depolarization of China is all carried out the peak and valley time electricity price individually outside the province at present, carries out peak valley and sells about 3,500 hundred million kilowatt hours of electric weight, accounts for total 40% of the electric weight of selling in the whole nation.This trend is also among increasing.
In air-conditioning industry, the cold-storage peak regulation technique obtains encouraging.Wherein most widely used is ice storage technology.At the tens of seats of the existing chilling air conditioning system of China, surpass 4000 in the U.S., in Japan above 2000.
Because saved the idle call electric weight in peak season (summer) in a large number, earth source heat pump has played the effect of peak regulation to a certain extent, but does not avoid the peak Elapsed Time within a day.Peak-regulating ground source heat pump system proposed by the invention is on the basis of earth source heat pump, utilizes its underground heat exchange system to come storage power in soil.Purpose is on the basis that does not increase cost, utilizes the electric power price difference of peak valley time, reduces the operating cost of air-conditioning and heating system, and the operational efficiency of the system that increases electric power improves the reliability of ground-source air-conditioning system simultaneously and reduces initial investment.
Peak-regulating ground source heat pump mainly by compressor (1), electronic or manual cross valve (2), condenser (3), expansion valve (4), evaporimeter (5), cooling tower (7), enclosed underground heat exchange unit (8), indoor unit (9), be used for the electric four-way valve (10 that circulation waterway switches, 11), water circulating pump (12,13,14), composition such as temperature sensor and control module.As the need domestic hot-water supply, can insert heat exchanger (6) at the compressor outlet place.If the outside air temperature in winter is too low, can between heat exchanger (3) and heat exchanger (7), insert auxiliary thermal source (15).Auxiliary thermal source can be provided by electric heating.Under heat supply mode, the function of condenser (3) and evaporimeter (5) is fully opposite under refrigeration mode with it, so all be called as heat exchanger.
Technical scheme of the present invention is: refrigerant circulation passage is provided with cross valve (2) makes system can switch refrigeration or heating mode between season, simultaneously, by connecting the cross valve (10 of cooling tower, underground unit and indoor unit, 11) switching can be connected in underground heat exchange unit on the condenser, as the heat-sink unit of refrigeration in summer, perhaps on the night electricity low ebb time period, it is connected on the evaporimeter, to reduce the soil moisture, as storing the cold unit.Operation by cross valve is finished automatically by control module.
Compare with the earth source heat pump of routine, the main feature of variable load accumulated earth-source hot-pump system is: use the cheap electric power of low ebb time period, can further reduce the operation of air conditioner cost significantly.Simultaneously,, keep the proper temperature of underground, greatly improved the stability of air-conditioning and heating system by reverse accumulation of energy.Owing to avoided energy accumulation, geothermal heat pump air-conditioning system significantly reduces the demand of underground soil volume, thereby saves the underground space, reduces the cost of underground heat exchange unit.
Below in conjunction with drawings and Examples, the present invention is further illustrated:
Fig. 1 is the case study on implementation schematic diagram of a typical water-ability of swimming peak-regulating ground source heat pump.Compressor (1), electronic or manual cross valve (2), condenser (3), expansion valve (4) and evaporimeter (5) are formed the cooling cycle system of sealing.Condenser (3) and evaporimeter (5) all adopt water cooling heat exchanger, and it is imported and exported water pipe and connects with cooling tower (7), underground cycle heat exchange unit (8) and indoor unit (9).Circulation fluid in the back three is by independently water pump (12,13,14) driving.Inserting electric heating auxiliary thermal source (15) in the system uses at cold district fully.
Fig. 2 is that the system during electricity consumption in the summer peak height peak connects schematic diagram.Cross valve (2) is set the kind of refrigeration cycle direction, and system is on the kind of refrigeration cycle pattern.Condensed water enters cooling tower (7) through water pump, and cross valve (10) connects the inlet of cooling tower outlet and underground heat exchange unit (8), passes through cross valve (11) and cross valve (10) again and returns condenser.Cooling tower and underground heat exchange unit have been born the heat radiation task jointly in the mode of series connection.On evaporimeter, unit cold water is transported to indoor through water pump (14), and the end-equipment of flowing through provides cold to the space.If needed, can insert heat exchanger (6) at compressor outlet, and provide the domestic hot-water to the outside with this.This hot water part is not subjected to influencing of systemic circulation direction, all is in the heat supply state in winter, summer.Auxiliary thermal source is in off-state in the system.
Fig. 3 is that the system during the electricity consumption peak low ebb in summer connects schematic diagram.Cross valve (2) still is on the refrigeration mode.But cross valve (10) makes cooling tower and underground heat exchange unit be in released state, and the cooling tower backwater directly enters condenser.Cross valve (11) is connected underground heat exchange unit and evaporimeter, makes itself and indoor unit together, and series connection is dispelled the heat to evaporimeter.When therefore the space obtained cold, therefore the underground temperature also reduced.Auxiliary thermal source (15) still disconnects.
Fig. 4 is the connection schematic diagram of system during electricity consumption in the winter peak height peak.Cross valve (2) oppositely is provided with, and system is in the heat supply state.Cross valve (11) separates indoor unit with underground heat exchange unit.Only the recirculated water in the indoor unit absorbs heat from heat exchanger (5), heats to the space.Cross valve (10) inserts heat exchanger (3) with cooling tower and underground heat exchange system series connection simultaneously.Refrigerating fluid after the throttling cooling absorbs heat by underground cooling tower and heat exchange unit from air and soil, and temperature is got a promotion.If outdoor temperature is too low, can avoid cooling tower (7) and only use underground heat exchange system to absorb underground heat, but auxiliary thermal source still disconnects, soil is unique external energy source.
Fig. 5 is the connection schematic diagram of system during the low power consumption in winter.Cross valve (2) still oppositely is provided with, and system is in the heat supply state.Cross valve (11) is with indoor unit and underground heat exchange unit series connection.From heat exchanger (5) absorb recirculated water behind the heat by indoor unit to the space heat supply.Recirculated water through indoor unit enters underground heat exchange unit again, for soil is heated, and stored energy.Refrigerating fluid after the throttling cooling absorbs energy by cooling tower and recovers from air.At this moment, if outside air temperature is too low, auxiliary thermal source (15) will be connected automatically.Auxiliary thermal source is to utilize cheap electric power generation this moment.
Cross valve (10,11), water circulating pump (12,13,14), auxiliary thermal source (15) etc. are operated by the control corresponding unit.Control module incoming clock, temperature sensor (can include, but not limited to import and export water temperature, underground temperature, indoor-outdoor air temperature etc.).Control module is according to the temperature data of gathering, and the peak and valley time electric rate, operates the action of each parts on suitable model.

Claims (6)

  1. A kind of peak-regulating ground source heat pump system that on the electric power low ebb time, utilizes the underground unit accumulation of energy, mainly by compressor (1), electronic or manual cross valve (2), condenser (3), expansion valve (4), evaporimeter (5), cooling tower (7), enclosed underground heat exchange unit (8), indoor unit (9), be used for the electric four-way valve (10 that circulation waterway switches, 11), water circulating pump (12,13,14), composition such as temperature sensor and control module.It is characterized in that:
    1, on refrigerant circulation passage, is provided with manual or electronic cross valve (2), connects compressor, condenser and evaporation respectively
    Device switches cross valve (2) and makes system change refrigeration or heating mode between season.Simultaneously at cooling tower, underground heat exchange
    Be provided with electric four-way valve (10) between unit and the condenser, between underground heat exchange unit and condenser, be provided with electronic four
    Logical valve (11).Switch position by cross valve (10,11), respectively underground heat exchange unit is connected on the condenser,
    Perhaps it is connected on the evaporimeter.
  2. 2, peak-regulating ground source heat pump system according to claim 1 is characterized in that at cooling tower and/or underground heat exchange unit
    The loop is provided with auxiliary thermal source.Its thermal source can be an electric heating.
  3. 3, peak-regulating ground source heat pump system according to claim 1 is characterized in that can connecting heat exchange at the compressor outlet place
    Device also connects with external water source, so that hot domestic hot-water to be provided.
  4. 4, peak-regulating ground source heat pump system according to claim 1 is characterized in that underground heat exchange unit is a closed circulation system
    System.Horizontal or vertical being embedded in filled circulating fluid in the underground pipeline, and drives with water pump.
  5. 5, peak-regulating ground source heat pump system according to claim 1 is characterized in that system is provided with and a plurality of and TEMP
    The control module that device links.Control module connects and operation electric four-way valve (10,11), and water circulating pump, auxiliary
    Thermal source etc.
  6. 6, peak-regulating ground source heat pump system according to claim 1, its characteristics are that cross valve also can be electronic by what separate
    Valve replaces.
CN01118555.4A 2001-06-01 2001-06-01 Peak-regulating ground source heat pump system for accumulating energy with valley power Pending CN1389689A (en)

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Application Number Priority Date Filing Date Title
CN01118555.4A CN1389689A (en) 2001-06-01 2001-06-01 Peak-regulating ground source heat pump system for accumulating energy with valley power
US10/159,654 US20030221436A1 (en) 2001-06-01 2002-05-31 Recoverable ground source heat pump

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CN01118555.4A CN1389689A (en) 2001-06-01 2001-06-01 Peak-regulating ground source heat pump system for accumulating energy with valley power
US10/159,654 US20030221436A1 (en) 2001-06-01 2002-05-31 Recoverable ground source heat pump

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CN100523650C (en) * 2007-05-23 2009-08-05 南京航空航天大学 Straight-expanded geo-source hot-pump air-conditioner water heater
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CN100427853C (en) * 2005-02-25 2008-10-22 Cne株式会社 Air conditioning and heating system with cold and warm gas operating simultaneously utilizing geothermal heat, and controlling means thereof
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