CN107131546A - Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system and operation method - Google Patents

Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system and operation method Download PDF

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Publication number
CN107131546A
CN107131546A CN201710397375.XA CN201710397375A CN107131546A CN 107131546 A CN107131546 A CN 107131546A CN 201710397375 A CN201710397375 A CN 201710397375A CN 107131546 A CN107131546 A CN 107131546A
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China
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water
heat
heating
pump
hot
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Inventor
张于峰
姚胜
邓娜
张高峰
董胜明
张彦
吕梦
吕梦一
孟艺伟
庞俊伟
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Tianjin University
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Tianjin University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00Hot-water central heating systems
    • F24D3/18Hot-water central heating systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00Devices for producing mechanical power from solar energy
    • F03G6/06Devices for producing mechanical power from solar energy with solar energy concentrating means
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/40Geothermal heat-pumps
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

The invention discloses a kind of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system, including solar water heating system, earth source heat pump low-temperature electricity-generating integral system, heating water system and four major parts of domestic hot-water supply system.Wherein solar water heating system is made up of storage tank, the first water pump and solar thermal collector etc.;Earth source heat pump low-temperature electricity-generating integral system is made up of the difunctional head of compression-expansion, the generating integrated motor of permanent-magnet electric, high-low-position side heat exchanger, expansion valve, working medium pump, two check valves, the second water pump and underground low level heat energy heat sink system etc.;Heating water system is made up of heating for water return pipeline, storage tank and interior heating system etc.;Domestic hot-water supply system is then made up of tap water pipe line, domestic hot-water's supply channel, storage tank and the building hot water supply system etc..By adjusting the on and off of valve, realize and utilize solar energy Heating by Ground Source Heat Pump supplying hot water in Heating Period, non-heating period utilizes solar power generation and supplying hot water.

Description

Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system and operation method
Technical field
The invention belongs to solar and superficial layer geothermal energy utilization technical field, more particularly to a kind of hot-water type solar and superficial layer Heat energy cogeneration of heat and power integral system and operation method.
Background technology
In recent years, inhabitation, comfortable working environment are required not with the sustainable development and people of Process of Urbanization Construction It is disconnected to improve, the Fast Growth of building trade is welcome, building energy consumption shows the situation of lasting rising.China's building energy consumption is accounted for entirely The ratio of social terminal energy consumption rises to 30% or so from the 10% of late 1970s.The winter of wherein northern area adopts The major part for building energy consumption is warmed up, every year more than about 1.5 hundred million tons of standard coals of consumption.At present, heat supply heating is still with consumption Based on stone fuel so that greenhouse gases and various harmful substances are largely discharged, and ecological environment is constantly on the hazard, and are also Heating Period The arch-criminal that haze sky is frequently occurred, especially in rurbania and the scatter fire of raw coal of vast rural area, causes a wide range of Air pollution.Therefore, as far as possible using clean energy resource, accelerate to improve what cleaning heating proportion had worked as national energy New emphasis.
Solar energy is inexhaustible, nexhaustible, is development and utilization new energy and regenerative resource without exploitation and transport Important content, have huge market prospects.China's solar energy resources very abundant, 2/3rds regional annual radiant all quality More than 5020MJ/m2, year, sunshine time was in more than 2200h, the good condition utilized with effective exploitation.The heat of low-temperature solar energy Using being most direct scheme, development is also the rapidest, and solar water heater, heating technology etc. are increasingly by the weight of people Depending on.The main heating zone of China is in the north, and precisely solar energy resources is than more rich area.Especially in the season for needing heating Section, fine day is relatively more, and basic condition is provided for solar heating.Solar heating refers to be used as heating system using solar energy Thermal source, convert solar energy into heat energy using solar thermal collector, supply building winter heating.With simple solar heat Water supply is compared, and China's solar-heating heating technology and engineer applied level are relatively low.Mostly to first develop passive type too It is positive can be based on heating, and active solar energy heating system is relatively slower always in the development of China, its engineer applied still in Starting stage.This is low mainly due to solar energy energy-flux density, and the sunshine-duration is limited, the influence of easy climate, and summer in winter energy It is unbalanced, cause traditional solar heating system running temperature low, heat collector erection space is big, it is necessary to set up auxiliary thermal source, The problems such as accumulation of energy difficulty is with non-heating period heat surplus, all direct or indirect economy and reliability that have influence on its operation.
In addition, the earth source heat pump that developed recently gets up is as a kind of HVAC technology of utilization regenerative resource, it is electricity Energy heating opens a new way.So-called earth source heat pump refers to using Rock And Soil, underground water or surface water as low-temperature heat source, by water Source source pump, geothermal energy exchange system, in building system composition heat-supply metering charge.Earth source heat pump can be more with a machine With, have a wide range of application, operational efficiency is high, maintenance cost is low, obvious environment benefit, therefore after 2005, as China pair can The renewable sources of energy apply the continuous reinforcement worked with energy-saving and emission-reduction, and the application of earth-source hot-pump system enters the fast development of explosion type Stage.Cut-off 2013, firmly the portion of building announce demonstrative project reach 324, it is in the majority with northern heat supply, all kinds building and Heat pump form has application, but is mostly used for city outskirts of a town, and rural area is seldom.The isolated operation of earth source heat pump has cold and hot injustice Weighing apparatus and the higher two important shortcomings of initial cost.The application of earth source heat pump has to follow the principle suited measures to local conditions, cold to whole year, The uneven area of thermic load, need to do economy technical Analysis, it is determined whether to set up auxiliary thermal source or low-temperature receiver, make both reasonable Match somebody with somebody, to ensure the operation of whole system efficiently, economic.Avoid because cooling and heating load is uneven, earth source heat pump is to subsurface disposal and absorption Heat, longtime running causes underground environment to deviate original poised state, forms cold tropical island effect, reduces the fortune of system Line efficiency, or even be not normally functioning.In addition, although earth-source hot-pump system running cost fortune is low, initial cost is higher, therefore how Rational reduction initial cost and operating cost are also the problem of earth-source hot-pump system application intermediate value is inquired into.
The content of the invention
Building and heating area of China is concentrated mainly on the areas such as severe cold and cold district, including northeast, North China and northwest, its face Product accounts for the 70% of China's area.In order to seek the New-type heating technology and alternative energy source that are suitable for vast northern area, Hot-water type solar heating, earth source heat pump, low-temperature electricity-generating technology are organically coupled, solar and superficial layer geothermal energy is constituted Utilization system, realizes and is maximized and across the utilization in season, Heating Period heating, non-heating period in the annual scope of solar energy resources Electrification energy storage, while domestic hot-water can also be provided as needed.It is effective to solve to run temperature in traditional solar heating system Degree is low, and heat collector erection space is big, it is necessary to set up auxiliary thermal source, the difficult technological difficulties such as with non-heating period heat surplus of accumulation of energy, And in earth source heat pump heating system it is cold and hot uneven higher with initial cost the problem of.
In order to solve the above-mentioned technical problem, a kind of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power one proposed by the present invention Body system, including storage tank, the first water pump, solar thermal collector, low level side heat exchanger, the difunctional head of compression-expansion, forever Magnetoelectricity moves generating integrated motor, high-order side heat exchanger, expansion valve, working medium pump, underground low level heat energy heat sink system and the second water Pump;Connected between above-mentioned each equipment and valve body by connecting line, annexation is:Two-way coil pipe is provided with the storage tank, So as to which the cavity of the storage tank is divided into shell side, first tube side and the second tube side, the shell side of the storage tank is provided with two groups Import and export, the port of export of the solar thermal collector is connected to after the shell side of the storage tank after first water pump The entrance point of the solar thermal collector, forms solar heat water circulation pipe;The shell side of the storage tank passes through described second Water pump is connected with the water side of high-order side heat exchanger, forms ground source heat pump hot water circulation line;First tube side string of the storage tank It is associated on heating confession-water return pipeline, the second tube side of the storage tank is connected between tap water pipe line and domestic hot-water's pipeline; Stop valve is equipped with heating supply channel, heating water return pipeline, tap water pipe line and domestic hot-water's pipeline;The compression-expansion Difunctional head and the generating integrated motor connection of the permanent-magnet electric;The port of export of the working medium side of low level side heat exchanger leads to The entrance point for the working medium side that the high-order side heat exchanger is connected to after the difunctional head of the compression-expansion is crossed, the high-order side is changed The port of export of the working medium side of hot device and the entrance point of the working medium side of low level side heat exchanger are parallel with by the first bypass and second Road, wherein, the first bypass is provided with expansion valve, the first bypass, provided with a stop valve at the import of the expansion valve, Heat pump check valve is provided with positioned at the exit of the expansion valve, so as to form earth source heat pump working medium side circulation line;Second bypass It is provided with working medium pump, the second bypass, provided with a stop valve at the import of the working medium pump, positioned at the working medium pump Exit is provided with generating check valve, so as to form low-temperature electricity-generating working medium side circulation line;The water side string of low level side heat exchanger It is associated on the underground low level heat energy heat sink system confession-water return pipeline.
Using above-mentioned hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system, by adjust valve conducting or Close, realize and utilize solar energy Heating by Ground Source Heat Pump supplying hot water in Heating Period, utilize solar power generation in non-heating period and provide Hot water;That is, in Heating Period, the stop valve closed in the second bypass, meanwhile, other stop valves are opened, into solar energy ground source heat Pump heat and heat water supplying mode operation;In non-heating period, closing is arranged on heating supply channel, heating water return pipeline and the first bypass On stop valve, meanwhile, other stop valves are opened, into hot-water type solar power generation supplying hot water mode operation.
Further, the step of present invention realizes solar energy Heating by Ground Source Heat Pump heat supply water running be:Start the first water pump Water in storage tank is squeezed into solar thermal collector and sends storage tank back to after heat absorption heating, solar heat water circulation is completed;Meanwhile, Start the generating integrated motor of permanent-magnet electric to run with compressed mode with the electric model operation driving difunctional head of compression-expansion Heat release in the heat exchanger of high-order side will be entered after the dry saturation gaseous state organic working medium produced in the heat exchanger of low level side pressurization heating to condense For saturated liquid, by the stop valve in the first bypass, it is low mass dryness fraction damp steam into expansion valve decompression cooling, then, then passes through Cross to be introduced in absorb heat in the heat exchanger of low level side after heat pump check valve and be evaporated to dry saturation vapor, complete earth source heat pump working medium side and follow Ring;In the low level water side of earth source heat pump, low level heat energy water prepared by underground low level heat energy heat sink system passes through heat source water feed pipe Road returns to underground low level heat energy heat sink system from heat source water water return pipeline after cooling into the heat exchanger heat release of low level side and completes circulation; In the high-order water side of earth source heat pump, start the second water pump, the water in storage tank is squeezed into high-order side heat exchanger after heat absorption heating Send into storage tank and complete ground source heat pump hot water circulation;Heating backwater passes through the first tube side heat absorption heating heel row entered in storage tank Go out and supplied water for heating, complete heating water circulation;Running water enters discharge after the second tube side heat absorption heating in storage tank and provides life Hot water living.
The step of present invention realizes hot-water type solar power generation heat supply water running be:Start the first water pump by storage tank Water, which is squeezed into, sends storage tank completion solar heat water circulation back to after heat absorption heating in solar thermal collector, for low-temperature electricity-generating and life Hot water is supplied;Start the saturation liquid organic working medium produced in working medium pump, low level side heat exchanger and enter work by stop valve (V6) After the pressurized heating of matter pump, the dry saturation steaming that heat absorption in high-order side heat exchanger is evaporated to high pressure-temperature is squeezed into by generating check valve Gas, is run into the difunctional head of compression-expansion with expansion mechanism, while driving the generating integrated motor of permanent-magnet electric to generate electricity Mode operation produces electric energy and exported, and the low-pressure low-temperature gaseous working medium after expansion, which enters in the heat exchanger of low level side, is condensed into saturated solution Body completes the circulation of low-temperature electricity-generating working medium side;In low-temperature electricity-generating low level water side, low level prepared by underground low level heat energy heat sink system is cold Source water returns to underground low level after being heated up by low-temperature receiver water supply channel into the heat absorption of low level side heat exchanger from low-temperature receiver water water return pipeline Thermal source heat sink system completes circulation;In the high-order water side of low-temperature electricity-generating, start the second water pump and the water in storage tank is squeezed into high-order side Storage tank is sent back to after heat release cooling, complete low-temperature electricity-generating hot water circuit in heat exchanger;The second pipe that running water enters in storage tank Discharge provides domestic hot-water after journey heat absorption heating.
Compared with prior art, the beneficial effects of the invention are as follows:
Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system and operation method proposed by the present invention utilize heat The organic coupling of water type solar heating, earth source heat pump and ORC (organic Rankine cycle) low-temperature generation technology, constitutes solar and superficial layer Comprehensive utilization of geothermal energy system.Realize in Heating Period heating, non-heating period implements solar energy thermal-power-generating and to underground energy-accumulating, simultaneously Can also the annual function that domestic hot-water is provided as needed.It mainly has the beneficial effect that:
1. hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system is realized using solar energy with shallow layer geothermal energy Heating Period heating, non-heating period generates electricity, the building demand of annual supplying hot water, be suitable for the vast northern area heating of China can Renewable sources of energy new application technology, can effectively improve the dual-pressure that traditional heating modes are brought to China's energy and environment. The organic coupling of earth source heat pump and low-temperature generating system, also reduces conventional solar energy earth source heat pump combined type heating system simultaneously The long-term idle energy waste brought of the initial cost and equipment of system and economic loss.
2. hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system is effectively solved because solar energy can flow Density is low, and the sunshine-duration is limited, the influence of easy climate, and summer in winter energy is unbalanced, the traditional solar heating system caused Running temperature is low, and heat collector erection space is big, it is necessary to set up auxiliary thermal source, and accumulation of energy is difficult to ask with non-heating period heat surplus etc. Topic.For example, if common radiator is selected in building and heating end, heat supply temperature requirement is more than 70 DEG C, and in the market mass selling Solar thermal collector, winter heat-collecting temperature is general between 50~70 DEG C.Therefore, conventional solar heating system end shape Formula requires lower floor radiant system either water-air processing equipment, but cost is of a relatively high from supply water temperature mostly. But the system can be by regulating and controlling the running status of earth source heat pump, the hot water temperature of in good time regulation storage tank supplies heating Water reaches the temperature requirement of various end-equipments;Solar heating generally requires the solar thermal collector of larger area, but for Most of building but can shoulder the solar thermal collector of whole building load without enough positions to install, and this is accomplished by Set up auxiliary thermal source, conventional have an electrical heating, fire coal, combustion gas, combustion firewood boiler, heat pump etc. causes the solar energy of system Fraction is relatively low, and is not carried out renewable energy source heating truly.And the system is using earth source heat pump as too The Secondary Heat Source of positive energy heating system, is the pure clean energy resource heating technology using solar energy and shallow layer geothermal energy.In non-heating Phase, using low-temperature electricity-generating technology by storage of solar energy in shallow layer geothermal energy, and in Heating Period, will be stored in using earth source heat pump The solar energy of underground extracts supply heating, realizes that bottom surface accumulates the solar thermal collector heating technology of big load.Therefore can be with According to building actual conditions, the erection space of solar thermal collector is significantly reduced;Immature supporting energy accumulating technique is China The major reason of solar heating system slower development.And the system actually reduces solar insuring rate according to building, mainly Heating is carried out using earth source heat pump and solar energy simultaneously so that whole heating process control is adjustable, without solar energy storage apparatus, System reliability is high;Solar energy seasonal power is unbalanced, can cause a large amount of wastes of non-heating period heat, can also be caused to system Infringement.Therefore, non-heating season heat surplus has had a strong impact on the development of solar heating cause.And the system is based on organic Rankine The a large amount of low-temperature water heatings output cleaning electric energy supply building produced in non-heating period solar thermal collector is recycled to use, and will Remaining heat is stored in shallow layer geothermal energy, in case needed for Heating Period building and heating, realizing the maximization of solar energy, across season Section application, also thoroughly solves the puzzlement that non-heating period heat surplus is brought.
3. hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system effectively solves traditional earth source heat pump and adopted The cold and hot uneven and higher shortcoming of initial cost of heating system isolated operation.For example, building and heating area of China is concentrated mainly on severe cold And cold district, heating load is commonly greater than refrigeration duty, or even many areas are all without refrigeration demand, along with part is built Domestic hot-water's demand, cause heating load significantly greater than refrigeration duty.If individually carrying out building using earth source heat pump to adopt It is warm, cause underground revenue and expenditure heat by serious, longtime running causes underground environment to deviate original poised state, is formed cold and hot Island effect, reduces the operational efficiency of system, or even is not normally functioning.And the system by solar heating, earth source heat pump with it is low Warm generation technology carries out organic coupling, rationally design so that equal with the heat absorbed to subsurface disposal, in order to avoid with causing shallow-layer The thermal pollution of heat energy, it is ensured that the operation of whole system efficiently, economic;In addition, the Heating by Ground Source Heat Pump system phase with isolated operation Than the system initial cost is relatively low, and can also obtain cleaning electric energy in non-heating period uses for building.
Brief description of the drawings
Fig. 1 is hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system schematic diagram of the present invention;
In figure:
1- storage tanks 2- the first water pump 3- solar thermal collectors
The difunctional generating integrated motor of head 6- permanent-magnet electrics of 4- low levels side heat exchanger 5- compression-expansions
7- high positions side heat exchanger 8- expansion valve 9- working medium pumps
10- undergrounds low level heat energy heat sink system the second water pumps of 11- V1~V6- is stop valve
C1- heat pump check valve C2- generating check valves
Embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, described is specific Only the present invention is explained for embodiment, is not intended to limit the invention.
The present invention mentality of designing be:By hot-water type solar heating, earth source heat pump and ORC (organic Rankine cycle) low-temperature hair Power technology is organically coupled, and constitutes solar and superficial layer comprehensive utilization of geothermal energy system, completes solar energy and geothermal Can heat output or store, realize Heating Period heating, non-heating period generate electricity and energy storage the annual method of operation, while can be with It is annual as needed that domestic hot-water is provided, realize and maximized and across the utilization in season in the annual scope of solar energy resources.Heating Period Using the heating process of solar energy and shallow layer geothermal energy, the cooling of shallow layer geothermal energy is realized, is follow-up solar heat power generation system The low-temperature receiver of high-quality is provided;The hot power generation process of solar energy is utilized in non-heating period, is next Heating Period ground source to underground heat accumulation Heat pump provides the low level heat energy of high-quality.Compared to traditional solar energy and earth source heat pump heating system, the system possess heat supply with The dual-use function of generating, can run whole year, at the same ensure that equipment run all the year round in source system cold and hot balance, and reach production The effect of energy.
As shown in figure 1, a kind of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system proposed by the present invention, bag Include storage tank 1, the first water pump 2, solar thermal collector 3, low level side heat exchanger 4, the difunctional head 5 of compression-expansion, permanent-magnet electric Generating integrated motor 6, high-order side heat exchanger 7, expansion valve 8, working medium pump 9, underground low level heat energy heat sink system 10 and the second water Pump 11.
Connected between above-mentioned each equipment and valve body by connecting line, annexation is as follows:
Two-way coil pipe is provided with the storage tank 1, so that the cavity of the storage tank 1 is divided into shell side, first tube side With the second tube side, the shell side of the storage tank 1 is provided with two groups of import and export, and the port of export of the solar thermal collector 3 is by described The entrance point of the solar thermal collector 3 is connected to after the shell side of storage tank 1 after first water pump 2, solar energy is formed Hot water circulating pipeline;The shell side of the storage tank 1 is connected by second water pump 11 with the water side of high-order side heat exchanger 7, shape Into ground source heat pump hot water circulation line.
First tube side of the storage tank 1 is connected on heating confession-water return pipeline, the second tube side string of the storage tank 1 It is associated between tap water pipe line and domestic hot-water's pipeline;Heating supply channel is provided with stop valve V1, and heating water return pipeline, which is provided with, to be cut Only valve V2, tap water pipe line is provided with stop valve V3, and domestic hot-water's pipeline is provided with stop valve V4.
The difunctional head 5 of compression-expansion is connected with the generating integrated motor of the permanent-magnet electric 6;The low level side is changed The port of export of the working medium side of hot device 4 is by being connected to the work of the high-order side heat exchanger 7 after the difunctional head 5 of the compression-expansion The entrance point of matter side, the port of export of working medium side and the entering for the working medium side of low level side heat exchanger 4 of the high-order side heat exchanger 7 Mouth end is parallel with the first bypass and the second bypass, wherein, the first bypass is provided with expansion valve 8, the first bypass, positioned at described swollen Provided with a stop valve V5 at the import of swollen valve 8, heat pump check valve C1 is provided with positioned at the exit of the expansion valve 8, so that shape Into source heat pump fluid side circulation line;Second bypass is provided with working medium pump 9, the second bypass, positioned at the import of the working medium pump 9 Place is provided with generating check valve C2, so as to form low-temperature electricity-generating work provided with a stop valve V6 positioned at the exit of the working medium pump 9 Matter side circulation line;
The water side of low level side heat exchanger 4 is connected on 10 confessions of the underground low level heat energy heat sink system-water return pipeline.
It is emphasized that the difunctional head 5 of compression-expansion in the present invention mainly uses piston machine, scroll machine, screw rod Compression and the expansion process of working medium are realized in the rotating operation of the equipment such as machine and centrifuge.The generating integrated motor of permanent-magnet electric 6 are the positive and negative rotating functions using magneto to realize driving and power generation process.For example, being driven when magneto is rotated along positive direction During motivation head acting, the difunctional head of compression-expansion is compressed process, and system enters heat pump operation mode.In turn, pressure is worked as When the difunctional head 2 of contracting expansion carries out expansion process with reverse direction operation, magneto just can be promoted to implement generating, system enters Generating operating mode.
To sum up, hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system of the invention can be divided into solar heat Water system, earth source heat pump low-temperature electricity-generating integral system, the main portion of heating water system and domestic hot-water supply system etc. four Point.Wherein solar water heating system is mainly made up of storage tank 1, the first water pump 2 and solar thermal collector 3 etc.;Earth source heat pump Low-temperature electricity-generating integral system is by low level side heat exchanger 4, the difunctional head 5 of compression-expansion, the generating integrated motor of permanent-magnet electric 6, high-order side heat exchanger 7, expansion valve 8, working medium pump 9, two check valves, the second water pump 11 and underground low level heat energy heat sink system 10 grades are constituted;Heating water system is made up of heating for water return pipeline, storage tank 1 and interior heating system etc.;Domestic hot-water supplies System is answered then to be made up of tap water pipe line, domestic hot-water's supply channel, storage tank 1 and the building hot water supply system etc..
In Heating Period, earth source heat pump low-temperature electricity-generating integral system is with earth source heat pump mode operation, from underground low level heat energy Heat is extracted in (soil, underground water, surface water etc.) and its grade is improved, joint low-temperature solar energy heat collector supplies for building It is warm, while can be supplied to domestic hot-water.And in non-heating period, system switchs to low-temperature electricity-generating operational mode, ensureing user's life heat On the premise of water, using shallow layer geothermal energies such as soil, underground water, surface water as low-temperature receiver (heat sink), it will be absorbed in solar thermal collector Low temperature heat energy electric energy be converted into by an organic Rankine bottoming cycle part used for building, while by the heat discharged in condenser Underground is stored in, the thermal loss of Heating Period is made up, it is ensured that underground heat balance between revenue and expenditure, it is to avoid underground cold island effect is formed, Pollute shallow layer geothermal energy.
Using hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system as shown in Figure 1, by adjusting valve On and off, realize Heating Period utilize solar energy Heating by Ground Source Heat Pump supplying hot water, utilize solar power generation in Heating Period Hot water is provided;That is, in Heating Period, the stop valve V6 closed in the second bypass, meanwhile, other five stop valves are opened, i.e. V1 is extremely V5, into solar energy Heating by Ground Source Heat Pump supplying hot water mode operation;In non-heating period, closing is arranged on heating supply channel Stop valve V5 on stop valve V1, heating water return pipeline stop valve V2 and the first bypass, meanwhile, other three stop valves are opened, That is V3, V4 and V6, into hot-water type solar power generation supplying hot water mode operation.
The step of realizing solar energy Heating by Ground Source Heat Pump heat supply water running be:
Start after the water in storage tank 1 is squeezed into solar thermal collector 3 heating of absorbing heat by the first water pump 2 and send storage tank 1 back to, Complete solar heat water circulation;Meanwhile, start the generating integrated motor 6 of permanent-magnet electric with electric model operation driving compression-expansion Difunctional head 5 is run after the dry saturation gaseous state organic working medium produced in low level side heat exchanger 4 pressurization heating with compressed mode Heat release is condensed into saturated liquid into high-order side heat exchanger 7, by the stop valve V5 in the first bypass, is dropped into expansion valve 8 Pressure drop temperature is low mass dryness fraction damp steam, then, then is introduced in after heat pump check valve C1 in low level side heat exchanger 4 evaporation of absorbing heat For dry saturation vapor, the circulation of earth source heat pump working medium side is completed;In the low level water side of earth source heat pump, underground low level heat energy heat sink system The 10 low level heat energy water prepared are entered after the heat release of low level side heat exchanger 4 cooling from heat source water return pipe by heat source water supply channel Road returns to underground low level heat energy heat sink system 10 and completes circulation;In the high-order water side of earth source heat pump, start the second water pump 11, will store up Water in water tank 1 squeezes into feeding storage tank 1 completion ground source heat pump hot water circulation after heat absorption heating in high-order side heat exchanger 7;Heating Backwater supplies water after stop valve V2 enters the first tube side heat absorption heating in storage tank 1 by stop valve V1 discharges for heating, Complete heating water circulation;Running water is after stop valve V4 enters the second tube side heat absorption heating in storage tank 1 by stop valve V3 discharges provide domestic hot-water.
The step of realizing hot-water type solar power generation heat supply water running be:
Start after the water in storage tank 1 is squeezed into solar thermal collector 3 heating of absorbing heat by the first water pump 2 and send storage tank 1 back to Solar heat water circulation is completed, for low-temperature electricity-generating and domestic hot-water supply;Start in working medium pump 9, low level side heat exchanger 4 and produce Saturation liquid organic working medium after stop valve (V6) enters the pressurized heating of working medium pump 9, squeezed into by generating check valve C2 Heat absorption is evaporated to the dry saturation vapor of high pressure-temperature in high-order side heat exchanger 7, into the difunctional head 5 of compression-expansion with bulging die Formula is run, while drive the generating integrated motor 6 of permanent-magnet electric to run generation electric energy in either a generation and export, it is low after expansion Cryogenic gas state working medium, which enters, is condensed into saturated liquid completion low-temperature electricity-generating working medium side circulation in low level side heat exchanger 4;In low temperature Generating low level water side, low level low-temperature receiver water prepared by underground low level heat energy heat sink system 10 enters low level by low-temperature receiver water supply channel Underground low level heat energy heat sink system 10 is returned to from low-temperature receiver water water return pipeline complete circulation after the heat absorption heating of side heat exchanger 4;In low temperature Generate electricity high-order water side, and the water in storage tank 1 is squeezed into high-order side heat exchanger 7 and sends storage back to after heat release cooling by the second water pump 11 of startup Water tank 1, completes low-temperature electricity-generating hot water circuit;The second tube side heat absorption heating that running water enters in storage tank 1 by stop valve V4 Afterwards domestic hot-water is provided by stop valve V3 discharges.
Research material:By taking Shenyang City as an example, hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system of the present invention The economy and Environmental Effect Analysis produced in annual is as follows.
Shenyang City is located at 123.4 ° of east longitude, and 41.8 ° of north latitude is complete on the abundant area of China's solar energy resources, horizontal plane Year, amount of radiation was in 3780~5040MJ/m2Between, the heat sent equivalent to 129~172kg standard coal combustions.Local latitude Camber plane annual day amount of radiation is 14.98MJ/ (m2D), the monthly average day radiation in local latitude camber plane December Measure as 11.437MJ/ (m2·d).Shenyang City belongs to the severe cold area of China's climate region of building, design calculating heating period day Number is 152 days.
The different building types of demand due to to(for) domestic hot-water is not quite similar, therefore is not related to life heat in this calculating The supply of water.Ensure earth source heat pump low-temperature electricity-generating integral system to subsurface disposal with absorb heat it is equal on the premise of, with The monthly average day amount of radiation that inclination angle is equal on local latitude camber plane carries out 100m2Solar thermal collector daylighting area hot-water type Solar and superficial layer geothermal energy cogeneration of heat and power integral system Heating Period heating load, the calculating of non-heating period generated energy.Wherein it is based on The solar thermal collector operating efficiency of daylighting area takes 50%;The heat loss rate of pipeline and water tank is 10%;According to seminar's phase Closing experimental result takes the generating efficiency of low-temperature electricity-generating operational mode unit to be 6%;The heat supply system of earth source heat pump operational mode unit Number is 4.0;Shenyang City's existing building heat-consuming index is 32.61W/m2;Heat metering price is per 0.25 yuan of kilowatt hour;Electricity consumption electricity Valency is per 0.50 yuan of kilowatt hour;Solar energy thermal-power-generating rate for incorporation into the power network is per 1.15 yuan of kilowatt hour;In addition, the conversion of heating power and standard coal Coefficient is calculated by heat equivalent value, and the signature coefficient of electric power then takes according to the annual development report of power industry 2016 0.315kg/ (kWh), while taking unit mark coal CO2Discharge capacity is 2.65kg/kg, SO2Discharge capacity is 1.49g/kg, NOxDischarge Measure as 1.37g/kg.Shown in correlation calculation result table 1.
The hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system energy economy & environment benefit calculation result of table 1
As can be drawn from Table 1, by taking Shenyang City as an example, for 100m2Solar thermal collector daylighting area, it is proposed by the present invention Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system Heating Period heating load is 76111kWh, can meet 674m2 The heating demand of construction area.Compared to traditional central heating system, system whole year economic well-being of workers and staff total value is 15952 yuan (expense-Heating Period earth source heat pump power consumption expense+non-heating period low-temperature electricity-generating is saved in annual economic well-being of workers and staff total value=Heating Period heat supply The electric energy income of generation), save mark coal 6126kg, CO2、SO2, NOx abatement amount be respectively 16234kg, 9128g, 8393g.Can See, the implementation of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system will bring huge economy and Environmental Effect Benefit.
Although above in conjunction with accompanying drawing, invention has been described, and the invention is not limited in above-mentioned specific implementation Mode, above-mentioned embodiment is only schematical, rather than restricted, and one of ordinary skill in the art is at this Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention's Within protection.

Claims (4)

1. a kind of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system, it is characterised in that including storage tank (1), First water pump (2), solar thermal collector (3), low level side heat exchanger (4), the difunctional head of compression-expansion (5), permanent-magnet electric hair Electrical integrated motor (6), high-order side heat exchanger (7), expansion valve (8), working medium pump (9), underground low level heat energy heat sink system (10) With the second water pump (11);
Connected between above-mentioned each equipment and valve body by connecting line, annexation is as follows:
Two-way coil pipe is provided with the storage tank (1), so that the cavity of the storage tank (1) is divided into shell side, first tube side With the second tube side, the shell side of the storage tank (1) is provided with two groups of import and export, and the port of export of the solar thermal collector (3) passes through The entrance point of the solar thermal collector (3) is connected to after the shell side of the storage tank (1) after first water pump (2), Form solar heat water circulation pipe;The shell side of the storage tank (1) passes through second water pump (11) and high-order side heat exchanger (7) water side connection, forms ground source heat pump hot water circulation line;
First tube side of the storage tank (1) is connected on heating confession-water return pipeline, the second tube side string of the storage tank (1) It is associated between tap water pipe line and domestic hot-water's pipeline;Heating supply channel, heating water return pipeline, tap water pipe line and life heat Stop valve is equipped with water lines;
The difunctional head of compression-expansion (5) is connected with the generating integrated motor of the permanent-magnet electric (6);The low level side is changed The port of export of the working medium side of hot device (4) is by being connected to the high-order side heat exchanger after the difunctional head of the compression-expansion (5) (7) entrance point of working medium side, the port of export and the low level side heat exchanger (4) of the working medium side of the high-order side heat exchanger (7) The entrance point of working medium side be parallel with the first bypass and the second bypass, wherein, the first bypass is provided with expansion valve (8), by first Lu Shang, provided with a stop valve (V5) at the import of the expansion valve (8), the exit positioned at the expansion valve (8) is set There is heat pump check valve (C1), so as to form earth source heat pump working medium side circulation line;Second bypass is provided with working medium pump (9), second In bypass, provided with a stop valve (V6) at the import of the working medium pump (9), the exit positioned at the working medium pump (9) Provided with generating check valve (C2), so as to form low-temperature electricity-generating working medium side circulation line;
The water side of low level side heat exchanger (4) is connected on underground low level heat energy heat sink system (10) confession-water return pipeline.
2. a kind of hot-water type solar and superficial layer geothermal energy cogeneration of heat and power operation method, it is characterised in that using such as claim 1 institute Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system is stated, by adjusting the on and off of valve, realization is being adopted Warm period utilizes solar energy Heating by Ground Source Heat Pump supplying hot water, utilizes solar power generation in non-heating period and provides hot water;Including:
In Heating Period, the second stop valve (V6) bypassed is closed, meanwhile, other stop valves are opened, into solar energy ground source heat Pump heat and heat water supplying mode operation;
In non-heating period, the stop valve being arranged in heating supply channel, heating water return pipeline and the first bypass is closed, meanwhile, Other stop valves are opened, into hot-water type solar power generation supplying hot water mode operation.
3. hot-water type solar and superficial layer geothermal energy cogeneration method according to claim 2, it is characterised in that realize the sun Energy Heating by Ground Source Heat Pump heat supply water running, step is as follows:
Start after the water in storage tank (1) is squeezed into solar thermal collector (3) heating of absorbing heat by the first water pump (2) and send storage tank back to (1) solar heat water circulation, is completed;
Meanwhile, start the generating integrated motor of permanent-magnet electric (6) with the electric model operation driving difunctional head of compression-expansion (5) Enter high-order side after running the dry saturation gaseous state organic working medium pressurization heating that will be produced in low level side heat exchanger (4) with compressed mode Heat release is condensed into saturated liquid in heat exchanger (7), by the stop valve (V5) in the first bypass, is depressured and drops into expansion valve (8) Temperature is low mass dryness fraction damp steam, then, then is introduced in after heat pump check valve (C1) heat absorption evaporation in low level side heat exchanger (4) For dry saturation vapor, the circulation of earth source heat pump working medium side is completed;
In the low level water side of earth source heat pump, low level heat energy water prepared by underground low level heat energy heat sink system (10) is supplied by heat source water Water lines return to underground low level heat energy heat sink system after entering low level side heat exchanger (4) heat release cooling from heat source water water return pipeline (10) circulation is completed;
In the high-order water side of earth source heat pump, start the second water pump (11), the water in storage tank (1) is squeezed into high-order side heat exchanger (7) feeding storage tank (1) completes ground source heat pump hot water circulation after heat absorption heating in;
The discharge after entering the heat absorption heating of the first tube side in storage tank (1) of heating backwater is supplied water for heating, completes heating water Circulation;
Running water enters discharge after the second tube side heat absorption heating in storage tank (1) and provides domestic hot-water.
4. the hot-water type solar and superficial layer geothermal energy cogeneration of heat and power operation method according to Claims 2 or 3, it is characterised in that Hot-water type solar power generation heat supply water running is realized, step is as follows:
Start after the water in storage tank (1) is squeezed into solar thermal collector (3) heating of absorbing heat by the first water pump (2) and send storage tank back to (1) solar heat water circulation is completed, for low-temperature electricity-generating and domestic hot-water supply;
Start the saturation liquid organic working medium produced in working medium pump (9), low level side heat exchanger (4) and enter work by stop valve (V6) After the pressurized heating of matter pump (9), squeeze into heat absorption in high-order side heat exchanger (7) by generating check valve (C2) and be evaporated to high pressure-temperature Dry saturation vapor, run into the difunctional head of compression-expansion (5) with expansion mechanism, at the same drive permanent-magnet electric power generation integrated Changing motor (6), operation produces electric energy and exported in either a generation, and the low-pressure low-temperature gaseous working medium after expansion exchanges heat into low level side Saturated liquid is condensed into device (4) and completes the circulation of low-temperature electricity-generating working medium side;
In low-temperature electricity-generating low level water side, low level low-temperature receiver water prepared by underground low level heat energy heat sink system (10) is supplied water by low-temperature receiver water Pipeline returns to underground low level heat energy heat sink system (10) after entering low level side heat exchanger (4) heat absorption heating from low-temperature receiver water water return pipeline Complete circulation;
In the high-order water side of low-temperature electricity-generating, start the second water pump (11) and squeeze into the water in storage tank (1) in high-order side heat exchanger (7) Storage tank (1) is sent back to after heat release cooling, completes low-temperature electricity-generating hot water circuit;
Running water enters discharge after the second tube side heat absorption heating in storage tank (1) and provides domestic hot-water.
CN201710397375.XA 2017-05-31 2017-05-31 Hot-water type solar and superficial layer geothermal energy cogeneration of heat and power integral system and operation method Pending CN107131546A (en)

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