CN107504552A - A kind of solar energy earth source heat pump joint energy supplying system and its progress control method - Google Patents
A kind of solar energy earth source heat pump joint energy supplying system and its progress control method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 178
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 239000002689 soil Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims abstract description 20
- 230000002354 daily Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005338 heat storage Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000875 corresponding Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 101710031899 moon Proteins 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
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- 230000000295 complement Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003203 everyday Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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Classifications
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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
- F24D17/00—Domestic hot-water supply systems
- F24D17/0015—Domestic hot-water supply systems using solar energy
- F24D17/0021—Domestic hot-water supply systems using solar energy with accumulation of the heated water
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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
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
- F24D19/106—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump and solar energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
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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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
-
- 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/06—Heat exchangers
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- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The present invention relates to a kind of solar energy earth source heat pump joint energy supplying system and its progress control method, its technical characterstic is, the system includes solar thermal collection system, earth-source hot-pump system and buried guard system and is made up of plate type heat exchanger, pump group and switch, and its progress control method is：Calculate each device parameter of solar energy earth source heat pump joint energy supplying system and build solar energy earth source heat pump joint energy supplying system：Operation control is carried out to collection thermal process, heat accumulation process and the concurrent heating process of solar energy earth source heat pump joint energy supplying system.Present invention analysis domestic hot-water demand user needs hot water supply time section, by controlling related switch and equipment, utilizes solar energy and earth source heat pump joint energy supply；The period of hot-water supply is not needed in domestic hot-water's demand user, heat in solar thermal collector is transported in soil by ground heat exchanger system, concurrent heating process is carried out to soil, solving existing earth source heat pump longtime running will caused Soil Thermal unbalance.
Description
Technical field
The invention belongs to field of new energy technologies, especially a kind of solar energy earth source heat pump joint energy supplying system and its operation
Control method.
Background technology
With the development of modern industry, global energy crisis and atmosphere polluting problem become increasingly conspicuous, the traditional fuel energy one
Reduce everyday, the field for the fossil energy that use is new, environmentally friendly, regenerative resource substitutes routine is constantly being expanded, and seeks one kind
Renewable, efficiency high energy resource supply mode is extremely urgent.Earth source heat pump is the land shallow-layer energy by inputting a small amount of Gao Pin
Potential energy source (such as electric energy) is realized from low grade heat energy to high-grade heat energy transfer, is a kind of cost-effective renewable energy utilization
Technology, in the northern area of China by extensive use, but in year round cooling, in the heat supply cycle, because building changes in temperature workload demand amount
, ground buried pipe of ground source heat pump system recepted the caloric from soil and heat release amount also, will so cause underground pipe regional temperature
Persistently it is raised and lowered, soil moisture balance phenomenon occurs, if this unbalanced situation continues for a long time, it will influences ground
The performance of buried tube heat exchanger, so as to reduce the operational efficiency of heat-exchange system, limit the permanently effective development of ground source heat pump technology.Too
The radiation energy of positive energy is very abundant resource, inexhaustible, nexhaustible, pollution-free and cheap, and solar thermal collector will
The heat energy that solar energy in illumination is converted into water is supplied to resident to use, with government widely popularize with correlation technique it is gradual into
Ripe, solar thermal collector is used on a large scale in most of remote districts and small towns, and investment is smaller, service life is general for it
For 7-8；But solar heat collector to supply heat water is had a great influence by season, weather and place locus, there is certain shakiness
It is qualitative.
If solar thermal collector and ground source heat pump technology are combined together, both advantage and disadvantage are complementary：By earth source heat pump
As the auxiliary thermal source of solar-heating water, the overall stability of solar energy hot water supply system is improved, is reduced due to weather, season
Influence and caused by unstability；The period of hot-water supply is not being needed, solar energy gives soil concurrent heating, can solve soil
The unbalanced problem of heat.
At present, the external application study starting to solar energy earth source heat pump combining heating system is more early, and Trillat et al. exists
The Practical Project of solar energy earth source heat pump association system is attempted within 2006 to establish, engineering object-oriented is answering for 180m2
Box-like house, provide the heating of house by solar energy earth-source hot-pump system and hot water for life, experimental data are shown：It is whole
The heating of individual combined type house and hot water demand are met, resident family's comfort level and satisfaction etc. are higher, but its application is only
A house, can degree of popularization it is not high.
Domestic aspect, existing research and utilization Digital PID Algorithm and innovatory algorithm, establishes solar energy-ground source heat pump
The partial parameters of air-conditioning system are emulated by formula air-conditioning computer control system, the results showed that the control system of design has
Good regulatory function, the robustness of system is good, can realize the purpose for saving the energy.But its time emulated is shorter, does not have
The running situation being given in longer simulation time, do not solve in earth source heat pump During Process of Long-term Operation issuablely
Temperature is too low near pipe laying influences system operation problem.
The content of the invention
It is overcome the deficiencies in the prior art the mesh of the present invention, proposes a kind of solar energy earth source heat pump joint energy supplying system
And its progress control method, solving existing earth source heat pump longtime running will caused Soil Thermal unbalance.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of solar energy earth source heat pump combines energy supplying system, including solar thermal collection system, earth-source hot-pump system and buried
Guard system；The solar energy system is connected and composed by heat collector, heat collection water tank and its switch S7, solar heat-collection circulating pump, described
Earth-source hot-pump system is connected and composed by hot water storage tank, earth source heat pump unit and hot water circulating pump, the heat collection water tank water inlet with
Running water is connected, and heat collection water tank delivery port is connected by switching S5 with hot water storage tank, and heat collection water tank delivery port is also by opening
S6 is closed to be sequentially connected with plate type heat exchanger, solar energy concurrent heating circulating pump and switch S7；Described earth source heat pump unit one end is by opening
Close S2 and plate type heat exchanger, source concurrent heating circulating pump, switch S4, switch S3, can pump and the earth source heat pump unit other end according to
Secondary connection；Described buried guard system one end is connected by switching S3 and ground energy pump with earth source heat pump unit one end, buried piping
The system other end is connected by switching S1 with the other end of earth source heat pump unit.
A kind of progress control method of solar energy earth source heat pump joint energy supplying system, comprises the following steps：
Step 1, each device parameter for calculating solar energy earth source heat pump joint energy supplying system simultaneously build solar energy ground source heat
Pump combines energy supplying system：
Step 2, collection thermal process, heat accumulation process and concurrent heating process to solar energy earth source heat pump joint energy supplying system are transported
Row control.
Each device parameter that the step 1 calculates solar energy earth source heat pump joint energy supplying system includes following content：
(1) hot-water heating system day heat consumption, hot water amount and hour heat consumption, hot water amount are designed：
Qd=mqrcρ(tr-tL)/86400
qd=mqr
In formula：QdFor day heat consumption, qdFor daily water consumption, m is with water unit of account number；qrFor hot water water consumption quota, ρ is
The density of water, c be water specific heat capacity, trFor hot water temperature, unit is DEG C；tLFor cold water temperature；
Qh=qh(tr-tL)N0bcρ
In formula：QhFor heat consumption, KhFor hour variation coefficient；qrFor hot water water consumption quota, c is the specific heat of water
Hold, trFor hot water temperature, tLFor cold water temperature, ρ is the density of water, qhFor the hour water consumption quota of water equipment, qhIt is small to design
When hot water amount, b be water equipment simultaneously use percentage；
(2) the area of solar thermal collector in solar thermal collection system is designed：
The heat collector area calculation formula of direct-type system is：
In formula：AcFor the solar thermal collector gross area, QdFor per day water consumption, c is the specific heat capacity of water, ρrWei Shui's is close
Degree, tendFor the termination design temperature of water in heat collection water tank, tLFor the initial temperature of water, JTFor annual day in gross collector area
Or monthly average day solar radiation amount, f dimension solar insuring rates ηcdFor heat collector year or monthly average collecting efficiency, ηLPosition pipeline and
The heat loss rate of water storage tank；
The heat collector area calculation formula of indirect type system is：
In formula：AINFor the indirect type solar thermal collector gross area, ACFor the direct-type solar thermal collector gross area, FRULFor
Heat collector overall heat loss coefficient, UkFor heat transfer coefficient of heat exchanger, AkFor the heat exchange area of indirect type system heat exchanger；
(3) the heat pump parameter in earth-source hot-pump system is designed：
The heating capacity and day heat consumption of source pump are calculated by below equation：
Qd1=0.8*Qd
Qg=24k1Qd1/T1
In formula：Qd1For day heat consumption, QgFor the average heating load of source pump design hour, k1For safety coefficient；T1For heat pump
The unit design working time；
(4) the length of underground pipe in outside ground system is designed：
L=(Pout-Pin)×1000/s
Wherein, L is drilling well effective length, PoutFor the output heats power of earth-source hot-pump system, PinFor earth-source hot-pump system
Input power, s is heat exchanger per linear meter(lin.m.) heat exchange amount.
Collection thermal process, heat accumulation process and the concurrent heating process for combining energy supplying system to solar energy earth source heat pump is run
Control includes the operation control of the following two kinds pattern：
Pattern one is the regular supply hot water period, including collection thermal process and heat accumulation process, its control mode are：Thermal-arrest mistake
The Cheng Caiyong temperature difference controls, heat collector outlet fluid and heat collection water tank source outlet fluid temperature difference T1 as control signal, when more than
During T1, start solar heat-collection circulating pump, when less than T1, then do not start collection thermal process；Heat accumulation process is equally controlled using the temperature difference,
Control signal is the temperature difference T2 of heat storage water tank source outlet temperature and design temperature, starts ground energy pump when more than T2 and hot water follows
Ring pump, start heat accumulation process, when less than T2, then do not start heat accumulation process；
Pattern two is not need hot water supply time section, including collection thermal process and soil concurrent heating process, its control mode are：
Soil concurrent heating process uses time control, when in non-hot water required time section S1, opening solar energy concurrent heating circulating pump and ground source
Concurrent heating circulating pump, the hot water energy in heat collection water tank is transported in soil by plate type heat exchanger.
The advantages and positive effects of the present invention are：
1st, present invention analysis domestic hot-water demand user needs hot water supply time section, by controlling related switch and setting
It is standby, utilize solar energy and earth source heat pump joint energy supply；The period of hot-water supply is not needed in domestic hot-water's demand user, will too
Heat in positive energy heat collector is transported in soil by ground heat exchanger system, concurrent heating process is carried out to soil, so as to real
Existing economical and effective and long-term College Students ' Apartments hot-water supply, solving existing earth source heat pump longtime running will caused soil
The hot unbalance of earth.
2nd, the present invention is set to the relevant device parameter of solar thermal collection system, earth-source hot-pump system, buried guard system
Meter calculates, and establishes the runtime of whole engineering, running is divided into hot water supply time section and non-thermal water supply period,
It is divided into collection thermal process and heat accumulation process in hot water supply time section, collection thermal process and concurrent heating is divided into the non-thermal water supply period
Journey, and around the system operation of whole engineering, corresponding system control strategy is provided respectively.Carried out on TRNSYS software platforms
The simulation study of 10 years, as a result display can effectively solve that the ground buried pipe of ground source heat pump arrangement adjacent soil moisture is too low to ask
Topic.
3rd, the present invention passes through the parameters such as each electrical equipment power consumption, solar energy heating efficiency, coefficient of performance COP, table
The solar energy earth source heat pump combined heat water system of bright design is economical and can effectively solve the problem that earth source heat pump longtime running causes
Soil Thermal unbalance.
Brief description of the drawings
Fig. 1 is the schematic diagram that solar energy earth source heat pump combines energy supplying system；
Fig. 2 is the average daily hot-water consumption's schematic diagram of A student dormitory of Efficiency in Buildings in Tianjin Area colleges and universities；
Fig. 3 is simulation model figure；
Fig. 4 is unlatching concurrent heating process workflow journey (overstriking mark)；
Fig. 5 is closing concurrent heating process workflow journey (overstriking mark)；
Fig. 6 is the total solar energy global radiation spirogram of the moon；
Fig. 7 is the available energy schematic diagram that the total heat collector of the moon absorbs；
Fig. 8 is the energy diagram of earth source heat pump auxiliary heating；
Fig. 9 is earth source heat pump power moon integration amount schematic diagram；
Figure 10 is monthly solar energy heating efficiency chart；
Figure 11 is monthly coefficient of performance figure；
Figure 12 is each equipment per monthly consumption figure；
Figure 13 is monthly soil thermal unbalance figure；
Figure 14 is year soil thermal unbalance figure in 10 years；
Figure 15 is monthly soil moisture figure；
Figure 16 is soil moisture figure in 10 years.
Embodiment
The embodiment of the present invention is further described below in conjunction with accompanying drawing.
A kind of solar energy earth source heat pump combines energy supplying system, as shown in figure 1, including solar thermal collection system, earth source heat pump
System and buried guard system；The solar energy system is that hot recycle pump connects by heat collector, heat collection water tank and its switch S7 and the sun
Composition is connect, the earth-source hot-pump system is connected and composed by hot water storage tank, earth source heat pump unit and hot water circulating pump, the solar energy
Collecting system, earth-source hot-pump system and buried guard system are linked together by plate type heat exchanger, and its specific connected mode is：Collection
Boiler water inlet is connected with running water, and heat collection water tank delivery port is connected by switching S5 with hot water storage tank, heat collection water tank
Delivery port is also sequentially connected by switching S6 with plate type heat exchanger, solar energy concurrent heating circulating pump and switch S7；Earth source heat pump unit
One end by switch S2 and plate type heat exchanger, source concurrent heating circulating pump, switch S4, switch S3, can pump, earth source heat pump unit
The other end is sequentially connected；Underground pipe one end is connected by switching S3 and ground energy pump with earth source heat pump unit one end, and underground pipe is another
One end is connected by switching S1 with the other end of earth source heat pump unit.
Above-mentioned solar energy earth source heat pump combine energy supplying system in, it is necessary to solar thermal collection system, earth-source hot-pump system,
The relevant device parameter of buried guard system is designed calculating.Running is divided into hot water supply time section and non-thermal water supply
Period, it is divided into collection thermal process and heat accumulation process in hot water supply time section, is divided into collection thermal process in the non-thermal water supply period
With concurrent heating process.And around actual system operation, corresponding system control strategy is provided respectively.
A kind of progress control method of solar energy earth source heat pump joint energy supplying system, comprises the following steps：
Step 1, each device parameter for calculating solar energy earth source heat pump joint energy supplying system simultaneously build solar energy ground source heat
Pump combines energy supplying system.
This step needs the demand according to water supply user, analysis day heat consumption, warm washing water's amount and hour heat consumption, hour
With hot water amount, to relevant device in the solar thermal collection system in joint hot-water supply system, earth-source hot-pump system, buried guard system
Parameter is designed calculating, and builds solar energy earth source heat pump joint energy supplying system according to device parameter.Circular is：
(1) hot-water heating system day heat consumption, hot water amount and hour heat consumption, hot water amount, are calculated：
Qd=mqrcρ(tr-tL)/86400
qd=mqr
In formula：QdFor day heat consumption, unit kJ；qdFor daily water consumption, unit is liter/day；M is with water unit of account number；
qrFor hot water water consumption quota, unit is liter/(man day)；ρ be water density, unit kg/L；C be water specific heat capacity, numerical value
For c=4187kJ/ (kg DEG C)；trFor hot water temperature, unit is DEG C；tLFor cold water temperature, unit is DEG C.
Qh=qh(tr-tL)N0bcρ
In formula：QhFor heat consumption, unit kJ；KhFor hour variation coefficient；qrIt is single for hot water water consumption quota
Position is liter/(man day)；C is the specific heat capacity of water, and numerical value is c=4187kJ/ (kg DEG C)；trFor hot water temperature, unit is DEG C；
tLFor cold water temperature, unit is DEG C；ρ be water density, unit kg/L；qhFor the hour water consumption quota of water equipment, unit is
L/h；qhFor design hour hot water amount, unit L/h；B is that water equipment uses percentage simultaneously.
(2) solar thermal collection system parameter is designed：
Solar thermal collection system chooses the area of solar thermal collector, hot water supply system according to monthly average daily water consumption
It is the pipeline that system equipment is determined according to maximum daily consumption.
Winter is daily maximum with hot water amount, and the 20% of total water heating heat is provided by solar energy.According to 06SS128 solar energy
Concentration heat wet concentration is used and installation specification, can directly calculate direct-type by per day water consumption, temperature and other known variable
System gross collector area, formula are as follows：
In formula：AcFor the solar thermal collector gross area, unit m2；QdFor per day water consumption, unit L；C is water
Specific heat capacity, unit are kJ/ (kg DEG C), ρrWei Shui density, unit kg/L；tendFor the termination design of water in heat collection water tank
Temperature, unit are DEG C；tLFor the initial temperature of water, unit is DEG C；JTFor annual day in gross collector area or monthly average day too
Positive energy amount of radiation, area kJ/m2；F ties up solar insuring rate, and empirical value takes 0.30~0.80；ηcdPut down for heat collector year or the moon
Equal collecting efficiency, empirical value take 0.25~0.50；ηLThe heat loss rate of position pipeline and water storage tank.
Indirect type system collecting efficiency reduces, and the heat collector area formula of indirect type system is as follows.
In formula：AINFor the indirect type solar thermal collector gross area, unit m2；ACFor the total face of direct-type solar thermal collector
Product, unit m2；FRULFor heat collector overall heat loss coefficient, unit is W/ (m2DEG C), it is plate to take 4~6；UkFor heat exchanger heat transfer
Coefficient, unit are W/ (m2·℃)；AkFor the heat exchange area of indirect type system heat exchanger, unit m2。
(3) ground source heat pump hot water systematic parameter is designed：
Earth-source hot-pump system is daily undertaking the 80% of total heating capacity in maximum winter with hot water amount, and the time of water heating is
15 hours.The heating capacity and day heat consumption of source pump can be drawn as follows：
Qd1=0.8*Qd
Qg=24k1Qd1/T1
In formula：Qd1For day heat consumption, unit kJ；QgFor the average heating load of source pump design hour, unit kJ；k1
For safety coefficient；T1For source pump design work time, unit h.According to the average heating load of source pump design hour, choosing
Take the source pump of corresponding output heats power.
(4) outside ground systematic parameter is designed：
Searching related data can obtain, and Efficiency in Buildings in Tianjin Area buried under ground heat exchange of heat pipe is 48.5W/m per linear meter(lin.m.) heat exchange amount, and one
The effective length of mouth drilling well is generally 80m.Meet the drilling well length needed for winter maximum caloric receptivity：
L=(Pout-Pin)×1000/s
Wherein, L is drilling well effective length, PoutFor the output heats power of earth-source hot-pump system, unit kW；PinFor ground
The input power of source heat pump system, unit kW；S is heat exchanger per linear meter(lin.m.) heat exchange amount, unit W/m.
In this step, after the device parameter that each system is calculated more than, by corresponding device parameter structure too
Positive energy earth source heat pump joint energy supplying system, as shown in Figure 1.
Step 2, collection thermal process, heat accumulation process and the concurrent heating process for combining energy supplying system to solar energy solar energy earth source heat pump
It is respectively controlled.
When user needs hot water to supply, by solar thermal collector and earth source heat pump combined heat, passed through according to common engineering
Test, the 80% of gross heat input is undertaken by earth-source hot-pump system, the 20% of gross heat input is undertaken by solar thermal collection system；In user
It is by the heat in solar thermal collector by plate type heat exchanger, ground heat exchanger, solar energy is defeated when not needing hot water supply
It is sent in thin solum, concurrent heating is carried out to soil.Hot water demand's supply time section, open and switch S1, S3, S5, closing switch S2,
S4, S6, S7, earth source heat pump make system worked well, solar energy and earth source heat pump joint supply domestic hot-water；During without hot water demand
Between section, solar energy is input in soil using plate type heat exchanger, to reach thermally equilibrated effect, open switch S1, S2, S4,
S6, S7, closing switch S3, S5.
Solar energy earth source heat pump combined heat water system is divided into two kinds of mode of operations in whole year：
Pattern one is the regular supply hot water period, is divided into collection thermal process and heat accumulation process, and collection thermal process uses temperature difference control
System, heat collector outlet fluid, as control signal, when more than T1, start the sun with heat collection water tank source outlet fluid temperature difference T1
Collect hot recycle pump, when less than T1, then do not start collection thermal process；Heat accumulation process is equally controlled using the temperature difference, and control signal is storage
The temperature difference T2 of boiler source outlet temperature and design temperature, start ground energy pump and hot water circulating pump when more than T2, start storage
Thermal process, when less than T2, then heat accumulation process is not started.
Pattern two is divided into collection thermal process and soil concurrent heating process, concurrent heating process uses not need hot water supply time section
Time control, when in non-hot water required time section S1, opening solar energy concurrent heating circulating pump and ground source concurrent heating circulating pump, by thermal-arrest
Hot water energy in water tank is transported in soil by plate type heat exchanger.
Illustrated below according to hot water demand's data instance of Fig. 2 Efficiency in Buildings in Tianjin Area College Students ' Apartments provided.Press
The key equipments such as solar water heating system as shown in table 1, earth-source hot-pump system, buried guard system are calculated according to the above method
Parameter：
Critical piece is detailed in table 1TRNSYS simulation models
According to engineering philosophy figure and thermal-arrest, heat accumulation, the control strategy of concurrent heating process：The T1 of the system is set to 10 DEG C, and T2 is set
For 15 DEG C, college student school time section, S1 14:00-16:00；Put the winter and summer vacation period in student, S1 8:00-17:
00。
Then, analog simulation research is carried out on TRNSYS softwares, Fig. 3 is built according to schematic diagram and control strategy
TRNSYS emulation platforms, Fig. 4 give service chart in the case of mode of operation two, and Fig. 5 is that service chart is (thick in the case of mode of operation one
The equipment room fluid traffic direction that line runs for participation).Simulation time is 10 years, the available energy absorbed by calculating heat collector
Energy (see accompanying drawing 8), the power integral that (see Fig. 6), solar energy total radiation (see accompanying drawing 7), earth source heat pump auxiliary heating provide
Amount is (see accompanying drawing 9), solar energy heating efficiency (see accompanying drawing 10), the coefficient of performance (see accompanying drawing 11), power consumption (see accompanying drawing 12), soil
Thermal equilibrium rate (accompanying drawing 13 is per lunar regolith unbalance factor figure, and accompanying drawing 14 is to emulate the annual uneven figure of soil in 10 years) and soil
Parameter, the checkings such as temperature (accompanying drawing 15 is monthly soil moisture figure, and accompanying drawing 16 is to emulate annual soil moisture figure in 10 years) are built
The validity of formwork erection type and the validity for solving Soil Thermal unbalance.By simulation result it can be seen that：It is provided by the invention too
Positive energy earth source heat pump joint energy supplying system and operation reserve, can solve Soil Thermal unbalance, and simultaneity factor can continue, be high
The operation of effect；Following conclusion can be drawn by simulation result：
(1) available energy, solar energy total radiation, the Di Yuan of solar energy earth source heat pump combined heat water system heat collector absorption
Heat pump auxiliary heats the energy provided, power integral amount, solar energy heating efficiency, coefficient of performance etc. with obvious seasonal；
Annual collecting efficiency can reach 42%, and the coefficient of performance of earth source heat pump is 3.44, and overall efficiency is higher；What geothermal energy provided
Energy proportion is 63%, and the energy proportion of solar energy is 37%, higher to the utilization rate of geothermal energy, meets the requirement of design.
(2) monthly total power consumption is maximum in the winter time for each equipment, and secondly, summer is minimum, is had a holiday or vacation the time in colleges and universities for transition season
Section, power consumption can almost be ignored in 500kWh or so；In each equipment whole year total power consumption, the power consumption of earth source heat pump is most
Greatly, 88.9% is accounted for, the power consumption of other water pumps is smaller, and total only accounts for 11.1%, it can be seen that joins using solar energy earth source heat pump
It is energy-conservation and economy to close hot-water supply system.
(3) thermal unbalance rate height monthly, difference is larger, but the Soil Thermal unbalance factor in the whole year is less than 20%,
Reach stable state；Soil Thermal unbalance factor in 10 years gradually reduces as year increases, preceding 5 years Soil Thermal unbalance factors
The speed of decline is 0.244, and the speed that rear 5 years Soil Thermal unbalance factors decline is 0.102, and the speed of reduction is less and less, most
A stable unbalance factor value will be tended to afterwards.
The year-round average temperature of (4) 10 years soil reduces year by year, and the speed reduced is less and less, preceding soil annual in 5 years
Temperature is reduced to 15.71 DEG C by 17.87 DEG C, declines 12.09%；5 years soil year-round average temperatures are dropped to by 15.49 DEG C afterwards
14.97 DEG C, decline 3.36%.It can be seen that soil year-round average temperature decline it is slower and slower, when soil year caloric receptivity and year
During heat release amount substantial equilibrium, the year-round average temperature of soil will be stablized near a fixed value, therefore solar energy earth source heat pump
Combined heat water system can be continual and steady operation.
It is emphasized that embodiment of the present invention is illustrative, rather than it is limited, therefore the present invention is simultaneously
The embodiment described in embodiment is not limited to, it is every to be drawn by those skilled in the art's technique according to the invention scheme
Other embodiment, also belong to the scope of protection of the invention.
Claims (4)
1. a kind of solar energy earth source heat pump combines energy supplying system, it is characterised in that：Including solar thermal collection system, earth source heat pump system
System and buried guard system；The solar energy system connects structure by heat collector, heat collection water tank and its switch S7, solar heat-collection circulating pump
Into the earth-source hot-pump system is connected and composed by hot water storage tank, earth source heat pump unit and hot water circulating pump, and the heat collection water tank enters
The mouth of a river is connected with running water, and heat collection water tank delivery port is connected by switching S5 with hot water storage tank, and heat collection water tank delivery port is also
It is sequentially connected by switching S6 with plate type heat exchanger, solar energy concurrent heating circulating pump and switch S7；Described earth source heat pump unit one end
By switch S2 and plate type heat exchanger, source concurrent heating circulating pump, switch S4, switch S3, can pump and earth source heat pump unit it is another
One end is sequentially connected；Described buried guard system one end is connected by switching S3 and ground energy pump with earth source heat pump unit one end, ground
The pipe laying system other end is connected by switching S1 with the other end of earth source heat pump unit.
A kind of 2. progress control method of the joint energy supplying system of solar energy earth source heat pump as claimed in claim 1, it is characterised in that
Comprise the following steps：
Step 1, each device parameter for calculating solar energy earth source heat pump joint energy supplying system simultaneously build solar energy earth source heat pump connection
Close energy supplying system：
Step 2, collection thermal process, heat accumulation process and concurrent heating process to solar energy earth source heat pump joint energy supplying system carry out operation control
System.
3. a kind of progress control method of solar energy earth source heat pump joint energy supplying system according to claim 2, its feature
It is：Each device parameter that the step 1 calculates solar energy earth source heat pump joint energy supplying system includes following content：
(1) hot-water heating system day heat consumption, hot water amount and hour heat consumption, hot water amount are designed：
Qd=mqrcρ(tr-tL)/86400
qd=mqr
In formula：QdFor day heat consumption, qdFor daily water consumption, m is with water unit of account number；qrFor hot water water consumption quota, ρ is water
Density, c be water specific heat capacity, trFor hot water temperature, unit is DEG C；tLFor cold water temperature；
Qh=qh(tr-tL)N0bcρ
<mrow>
<msub>
<mi>q</mi>
<mi>h</mi>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>Q</mi>
<mi>h</mi>
</msub>
<mrow>
<mn>4.1868</mn>
<mrow>
<mo>(</mo>
<msub>
<mi>t</mi>
<mi>r</mi>
</msub>
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<mi>L</mi>
</msub>
<mo>)</mo>
</mrow>
<mi>&rho;</mi>
</mrow>
</mfrac>
</mrow>
In formula：QhFor heat consumption, KhFor hour variation coefficient；qrFor hot water water consumption quota, c is the specific heat capacity of water, tr
For hot water temperature, tLFor cold water temperature, ρ is the density of water, qhFor the hour water consumption quota of water equipment, qhFor design hour heat
Water, b are that water equipment uses percentage simultaneously；
(2) the area of solar thermal collector in solar thermal collection system is designed：
The heat collector area calculation formula of direct-type system is：
<mrow>
<msub>
<mi>A</mi>
<mi>C</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>Q</mi>
<mi>d</mi>
</msub>
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<mi>c&rho;</mi>
<mi>r</mi>
</msub>
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<mi>e</mi>
<mi>n</mi>
<mi>d</mi>
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<mo>)</mo>
</mrow>
<mi>f</mi>
</mrow>
<mrow>
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<mi>J</mi>
<mi>T</mi>
</msub>
<msub>
<mi>&eta;</mi>
<mrow>
<mi>c</mi>
<mi>d</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<msub>
<mi>&eta;</mi>
<mi>L</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
</mrow>
In formula：AcFor the solar thermal collector gross area, QdFor per day water consumption, c is the specific heat capacity of water, ρrWei Shui density,
tendFor the termination design temperature of water in heat collection water tank, tLFor the initial temperature of water, JTFor annual day in gross collector area or
Monthly average day solar radiation amount, f dimensions solar insuring rate ηcdFor heat collector year or monthly average collecting efficiency, ηLPosition pipeline and storage
The heat loss rate of water tank；
The heat collector area calculation formula of indirect type system is：
<mrow>
<msub>
<mi>A</mi>
<mrow>
<mi>I</mi>
<mi>N</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>A</mi>
<mi>c</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<mrow>
<msub>
<mi>F</mi>
<mi>R</mi>
</msub>
<msub>
<mi>U</mi>
<mi>L</mi>
</msub>
<msub>
<mi>A</mi>
<mi>c</mi>
</msub>
</mrow>
<mrow>
<msub>
<mi>U</mi>
<mi>k</mi>
</msub>
<msub>
<mi>A</mi>
<mi>k</mi>
</msub>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
</mrow>
In formula：AINFor the indirect type solar thermal collector gross area, ACFor the direct-type solar thermal collector gross area, FRULFor thermal-arrest
Device overall heat loss coefficient, UkFor heat transfer coefficient of heat exchanger, AkFor the heat exchange area of indirect type system heat exchanger；
(3) the heat pump parameter in earth-source hot-pump system is designed：
The heating capacity and day heat consumption of source pump are calculated by below equation：
Qd1=0.8*Qd
Qg=24k1Qd1/T1
In formula：Qd1For day heat consumption, QgFor the average heating load of source pump design hour, k1For safety coefficient；T1For source pump
The design work time；
(4) the length of underground pipe in outside ground system is designed：
L=(Pout-Pin)×1000/s
Wherein, L is drilling well effective length, PoutFor the output heats power of earth-source hot-pump system, PinFor the defeated of earth-source hot-pump system
Enter power, s is heat exchanger per linear meter(lin.m.) heat exchange amount.
4. a kind of progress control method of solar energy earth source heat pump joint energy supplying system according to claim 2, its feature
It is：Collection thermal process, heat accumulation process and the concurrent heating process for combining energy supplying system to solar energy earth source heat pump carries out operation control
System includes the operation control of the following two kinds pattern：
Pattern one is the regular supply hot water period, including collection thermal process and heat accumulation process, its control mode are：Collection thermal process is adopted
Being controlled with the temperature difference, heat collector outlet fluid and heat collection water tank source outlet fluid temperature difference T1 is as control signal, when more than T1,
Start solar heat-collection circulating pump, when less than T1, then do not start collection thermal process；Heat accumulation process is equally controlled using the temperature difference, control
Signal is the temperature difference T2 of heat storage water tank source outlet temperature and design temperature, and starting ground when more than T2 can pump and hot water circuit
Pump, start heat accumulation process, when less than T2, then do not start heat accumulation process；
Pattern two is not need hot water supply time section, including collection thermal process and soil concurrent heating process, its control mode are：Soil
Concurrent heating process uses time control, when in non-hot water required time section S1, opening solar energy concurrent heating circulating pump and ground source concurrent heating
Circulating pump, the hot water energy in heat collection water tank is transported in soil by plate type heat exchanger.
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| CN109489152A (en) * | 2018-09-25 | 2019-03-19 | 安徽科恩新能源有限公司 | A kind of composite energy accumulated system based on earth source heat pump Yu the accumulation of energy of multi-groove type water |
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| CN108413655A (en) * | 2018-03-20 | 2018-08-17 | 湖南中大经纬地热开发科技有限公司 | A kind of soil source Temperature Field equalized temperature system using solar energy |
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| CN109489152A (en) * | 2018-09-25 | 2019-03-19 | 安徽科恩新能源有限公司 | A kind of composite energy accumulated system based on earth source heat pump Yu the accumulation of energy of multi-groove type water |
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| CN110779239A (en) * | 2019-11-06 | 2020-02-11 | 杭州电子科技大学 | Solar energy-air source heat pump control system based on prediction model and energy-saving control method |
| CN110779239B (en) * | 2019-11-06 | 2022-01-04 | 杭州电子科技大学 | Solar energy-air source heat pump control system based on prediction model and energy-saving control method |
| CN110687778B (en) * | 2019-11-06 | 2023-01-10 | 国网天津市电力公司 | Cascade control method of electric heating system and PID parameter setting method of main regulator |
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Application publication date: 20171222 |