CN109185952A - A kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler - Google Patents
A kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler Download PDFInfo
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- CN109185952A CN109185952A CN201811184442.0A CN201811184442A CN109185952A CN 109185952 A CN109185952 A CN 109185952A CN 201811184442 A CN201811184442 A CN 201811184442A CN 109185952 A CN109185952 A CN 109185952A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 230000006835 compression Effects 0.000 claims abstract description 38
- 238000007906 compression Methods 0.000 claims abstract description 38
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000002918 waste heat Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000008400 supply water Substances 0.000 claims abstract description 11
- 239000006200 vaporizer Substances 0.000 claims abstract description 3
- 239000000284 extract Substances 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 230000002631 hypothermal effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- 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
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Data center's cold and heat combined supply great temperature difference heat supply system that the invention discloses a kind of in conjunction with boiler, it include: chiller unit, data center's waste heat is extracted by the refrigerated circulating water of vaporizer side, it is divided into two-way heat release in condenser side, a heat supply network return water is wherein heated all the way, another way accesses compression heat pump evaporator, as low order heat source for heat pump；Compression heat pump, heat supply network return water of condenser stepped heating, evaporator absorb the waste heat of cooling circulating water, and cooling circulating water returns to chiller unit after exchanging heat in compression heat pump evaporator；Heat supply network return water is heated to after heat supply temperature and sends out data center by heat supply water supply line by boiler；Hot-water type absorption heat exchange unit, heat supply network, which supplies water, to radiate by the heat-exchange unit to terminal user；And associated pipe and attachment form.Data center's great temperature difference heat supply system of the invention uses cold and heat combined supply, to be created condition using low grade heat energy even waste heat etc., to substantially reduce heat cost.
Description
Technical field
The invention belongs to low-grade industrial exhaust heats to utilize technical field, and it is cold and hot to be related to a kind of data center in conjunction with boiler
Alliance great temperature difference heat supply system.
Background technique
In recent years due to the pressure of environmental protection, the demand explosive growth of heating is cleaned, many areas of northern China is caused to go out
Now cleaning heating source situation in short supply.State-level also proposed " promoting the cleaning heating of northern area winter " and " firmly beat
The important decision of good blue sky defended war ", it is desirable that utilize clean energy resource as far as possible, accelerate to improve cleaning heating specific gravity, accelerate to solve
Pollution that caused by coal burning problem.
In recent years, due to Internet of Things, artificial intelligence, big data industry flourish, the scale of data center is more built
Bigger, total energy consumption is also increasing, accounts for 1.5% or more of whole society's energy consumption.Simultaneously for environmental requirement, newly-built data
Progress data center's UTILIZATION OF VESIDUAL HEAT IN is such as thought far from city in center, needs to build long range hot water pipe net and realizes heat conveying, and normal
It is higher to advise heat supply network return water temperature, usually 40 DEG C~50 DEG C, thus brings two aspect problems: (1) due to heat supply network confession, backwater temperature difference
Small, flow is big, causes the pipe network of data center's waste heat for supplying project to be invested high with operating cost；(2) heat supply network return water can not be with number
It directly exchanges heat according to center cooling water heat, the cost of waste heat recycling is big.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
Data center's cold and heat combined supply great temperature difference heat supply system that the purpose of the present invention is to provide a kind of in conjunction with boiler, from
And overcome problem of the prior art.
To achieve the above object, data center's cold and heat combined supply great temperature difference heat supply that the present invention provides a kind of in conjunction with boiler
System, comprising: chiller unit, chiller unit extract data center's waste heat by the refrigerated circulating water of vaporizer side,
Chiller unit is divided into two-way heat release in condenser side, wherein heating a heat supply network return water all the way, another way accesses compression
Evaporator with heat pump, as low order heat source for heat pump, waste heat is discharged into environment by cooling tower；At least one compression type heat
Pump, cooling circulating water heat release in the condenser of at least one compression heat pump, each of at least one compression heat pump
Heat supply network return water of compression heat pump stepped heating, cooling circulating water at least one compression heat pump evaporation side heat release it
Afterwards, chiller unit is flowed back to；Heat supply network return water can be heated to after heat supply temperature by for hot water supplying pipe by boiler, boiler
Line sends out data center；Hot-water type absorption heat exchange unit, heat supply network, which supplies water, to be used by hot-water type absorption heat exchange unit to terminal
Family heat dissipation；Wherein, heat supply network supplies water after the hot-water type absorption heat exchange unit of outflow thermal substation, by for hot water return line,
Data center is flowed back to, is heated up after the condenser heat exchange of subsequent heat supply network return water and chiller unit, the heat supply network return water after heating up
Successively with each stage compression type heat pump and boiler heat exchange in compression heat pumps at different levels, heat supply network return water be heated up step by step to
It is sent out after heat supply temperature by heat supply water supply line；And associated pipe and attachment.
Preferably, in above-mentioned technical proposal, compression type heat pump assembly is electric drive screw or centrifugal heat pump unit.
Preferably, in above-mentioned technical proposal, after boiler heats heat supply network return water, the temperature of heat supply network return water is heated to greatly
Data center is sent out by heat supply water supply line in 90 DEG C, and after the heat supply temperature less than 120 DEG C.
Preferably, in above-mentioned technical proposal, heat supply network, which supplies water, extracts heat by the hot-water type absorption heat exchange unit of thermal substation
Later, heat supply network return water temperature is down to 25 DEG C by returning to data center for hot water return line.
Preferably, in above-mentioned technical proposal, compression heat pump includes: 45 DEG C of highest outlet temperature of conventional compact formula centrifugation
The height of heat pump unit, 55 DEG C of highest outlet temperature of conventional compact formula hot screw pump unit and 65 DEG C of highest outlet temperature or more
Warm compression heat pump, and wherein, the return water step and chiller unit, 45 DEG C of outlet temperature of conventional centrifugal heat pump of heat supply network
Unit, 55 DEG C of outlet temperature of conventional compact formula hot screw pump unit, 65 DEG C of outlet temperature or more of high temperature compressed formula heat pump with
And boiler heat exchange, it is heated to after heat supply temperature and data center is sent out by heat supply water supply line.
Preferably, in above-mentioned technical proposal, the hot water temperature of data center's heat supply pipeline outlet is 90 DEG C or more.
Preferably, in above-mentioned technical proposal, chiller unit and compression heat pump are run simultaneously, cold and heat combined supply.
Preferably, in above-mentioned technical proposal, hot-water type absorption heat exchange unit is driven by a heat supply network high-temperature-hot-water, once
Net return water temperature is lower than secondary network return water temperature.
Compared with prior art, data center's cold and heat combined supply great temperature difference heat supply system of the invention in conjunction with boiler has
It is following the utility model has the advantages that
1) the heat supply network heat supply temperature difference is big, has increased considerably the conveying capacity of heat supply network, and then can reduce the investment of entire pipe network；
2) heat source side setting boiler provides high-temperature-hot-water, reduces the retrofit work amount of end thermal substation；
3) hot-water type absorption heat exchange unit heat secondary network heating water is used in end, advantage is can sufficiently to reduce once
The return water temperature of heat supply network has widened confession, the backwater temperature difference of big heat supply network, while heat pump does not need other type energy and does driving force,
A small amount of electric power is only provided；
4) data center's cold and heat combined supply great temperature difference heat supply, efficiency of energy utilization is high, and operating cost is low.
Detailed description of the invention
Fig. 1 is the flow diagram of data center's cold and heat combined supply great temperature difference heat supply system of the invention in conjunction with boiler；
Fig. 2 is the modified flow schematic diagram of data center's cold and heat combined supply great temperature difference heat supply system of the invention in conjunction with boiler.
Specific embodiment
Hereinafter, the description present invention is concentrated using the big temperature difference of cold and heat combined supply waste heat of data center's waste heat with reference to the accompanying drawings
The embodiment of heating system.
The embodiment recorded herein is specific specific embodiment of the invention, for illustrating design of the invention,
Be it is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein
Outside embodiment, those skilled in the art can also based on the claim of this application book and specification disclosure of that using aobvious and
The other technical solutions being clear to, these technical solutions include using any obvious to making for the embodiment recorded herein
The technical solution of substitutions and modifications.
The attached drawing of this specification is schematic diagram, aids in illustrating design of the invention, it is schematically indicated the shape of each section
And its correlation.It note that for the ease of clearly showing the structure of each component of the embodiment of the present invention, between each attached drawing
Do not drawn according to identical ratio.Identical reference marker is for indicating identical part.
As shown in Figure 1, heating system according to the preferred embodiment of the present invention include: chiller unit 1, at least one
(in a preferred embodiment, at least one compression heat pump includes conventional compact formula heat pump 2 and high temperature compressed to compression heat pump
Formula heat pump 3, wherein conventional compact formula heat pump 2 includes conventional heat pump evaporator 2a, conventional heat pump condenser 2b, high temperature compressed formula
Heat pump 3 includes high temperature heat pump evaporator 3a, high temperature heat pump condenser 3b), high-temperature water hypothermal 4 and hot-water type absorption heat exchange
Unit 5.Wherein, heating system further include: secondary network water circulating pump 6, user end equipment 7(user end equipment 7 belong to hot use
Family 10), primary net water circulating pump 8.Wherein, data center is extracted by refrigerated circulating water in chiller unit evaporator 1a
Waste heat is divided into two-way heat release in 1b condenser side, wherein heating a heat supply network return water all the way, another way accesses compression type heats at different levels
The evaporator of pump, as the low level heat energy of heat pump, waste heat is discharged into environment by cooling tower.Cooling circulating water is compressing
After the heat exchange of formula evaporator with heat pump side, chiller unit condenser 1b is flowed back to, the heat release at compression heat pump condenser, step by step
Heat a heat supply network return water.High-temperature water hypothermal 4 passes through heat supply after heat supply network return water finally capable of being heated to heat supply temperature
Water supply line sends out data center.Heat supply network, which supplies water, to radiate by hot-water type absorption heat exchange unit 5 to terminal user, wherein hot water
Type absorption heat exchange unit 5 belongs to thermal substation 9.Wherein, heat supply network hot water is in outflow thermal substation hot-water type absorption heat exchange unit pump 5
Later, it by flowing back to data center for hot water return line, heats up after exchanging heat with chiller unit condenser, then with series connection
Mode successively successively exchanges heat with compression heat pumps at different levels and high-temperature water hypothermal 4, leads to after being heated up step by step to heat supply temperature
The submitting of heat supply water supply line is crossed, is recycled in cycles.
Preferably, chiller unit condenser 1b is imported and exported and is provided with bypass pipe between pipeline, by adjusting valve regulation
Water in siphunculus.Hot water temperature in compression heat pump leaving condenser water pipeline is 65 DEG C ± 10 DEG C.1 He of chiller unit
Conventional compact formula heat pump is run simultaneously, cold and heat combined supply.
As can be seen that the present invention uses chiller unit 1, compression heat pump and high-temperature-hot-water pot inside data center
The return water of the combined mode data collection center waste heat of furnace 4 and heat supply network of stepped heating, in end, thermal substation utilizes hot-water type
On the one hand the mode that absorption heat exchange unit 5 radiates effectively has recycled the waste heat generated in data center's process of refrigerastion, cold and hot
For efficiency of energy utilization is high, and on the other hand it is absorption to enter back into hot-water type after boiler finally heats up heating for primary net hot water
Heat-exchange unit 5, the confession for increasing central heating system primary side hot water by a relatively large margin, backwater temperature difference are greatly lowered primary
Heat supply network return water temperature, or even substantially less than secondary network inflow temperature, so as to greatly reduce the initial cost and water of pipe-line system
Pump operation power consumption, to be created condition using heat source low grade heat energy even waste heat etc., to improve system comprehensive energy
Utilization efficiency reduces heat cost.
In another preferred embodiment of the present invention, compression type heat pump assembly is serially connected using multiple heat-pump apparatus, at different levels
Compression type heat pumping unit is the equipment of same model.Compression type heat pumping units at different levels are taken such as under type: outlet temperature highest 45
DEG C conventional compact formula centrifugation heat pump unit, 55 DEG C of outlet temperature highest of conventional compact formula hot screw pump unit and outlet temperature
The high temperature compressed formula heat pump series connection heating of 65 DEG C of degree or more.
As shown in Fig. 2, the multi-stage heating system of another preferred embodiment of the invention includes: plate heat exchanger 11, often
Advise evaporator with heat pump 2a, conventional heat pump condenser 2b, high temperature heat pump evaporator 3a, high temperature heat pump condenser 3b, high-temperature-hot-water pot
Furnace 4, hot-water type absorption heat exchange unit 5, secondary network water circulating pump 6, user's end equipment 7, primary net water circulating pump 8 and phase
Close pipeline and attachment.
Plate heat exchanger 11 heats heat supply network return water for the first time, and cooling water returns again to after being cooled with the heat exchange of plate heat exchanger 11
Extract data center's waste heat；Compression type heat pump assembly evaporator 2a is entered by data center's cooling circulating water, as low level heat energy
A heat supply network return water is heated again in the side compression heat pump train condenser 2b, returns again to data center's cooling-water machine after heat release cooling
Group completes circulation；Heat supply network return water passes through the final heating of high-temperature water hypothermal 4, and a hot net water is defeated by heat supply water supply line
It is sent to end thermal substation, the returned data after 5 heat release of hot-water type absorption heat exchange unit cools to a heat supply network return water temperature
Circulation is completed at center.
In conclusion the heat supply network heat supply temperature difference of the invention is big, the conveying capacity of heat supply network is increased considerably, and then can drop
The investment of low entire pipe network；Heat source side is arranged boiler and provides high-temperature-hot-water, reduces the retrofit work amount of end thermal substation；At end
End uses hot-water type absorption heat exchange unit heat secondary network heat supply return water, and advantage is the return water that can sufficiently reduce a heat supply network
Temperature has widened confession, the backwater temperature difference of big heat supply network, while heat pump does not need other type energy and does driving force, only provides a small amount of
Electric power；Primary net return water temperature is substantially less than secondary network return water temperature；Data center's cold and heat combined supply great temperature difference heat supply, the energy
Utilization efficiency is high, and operating cost is low.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (8)
1. a kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler, which is characterized in that the heating system
Include:
Chiller unit, the chiller unit extract data center's waste heat, institute by the refrigerated circulating water of vaporizer side
It states chiller unit and is divided into two-way heat release in condenser side, wherein a heat supply network return water is heated all the way, another way access compression
Formula evaporator with heat pump, as low order heat source for heat pump, waste heat is discharged into environment by cooling tower；
At least one compression heat pump, the cooling circulating water are put in the condenser of at least one compression heat pump
Heat, heat supply network return water of each of at least one described compression heat pump compression heat pump stepped heating, the cooling follow
Ring water flows back to the chiller unit after the evaporation side heat release of at least one compression heat pump；
Boiler, the boiler are sent out in data after heat supply network return water can be heated to heat supply temperature by heat supply water supply line
The heart；
Hot-water type absorption heat exchange unit, heat supply network, which supplies water, to radiate by the hot-water type absorption heat exchange unit to terminal user；
Wherein, the heat supply network supplies water after the hot-water type absorption heat exchange set heat exchange with thermal substation, passes through heat supply return pipe
Line flows back to the data center, heats up, heats up after the subsequent heat supply network return water and the condenser heat exchange of the chiller unit
Heat supply network return water later in a series arrangement successively with each stage compression type heat pump and the boiler in compression heat pumps at different levels
It successively exchanges heat, the heat supply network hot water is sent out after being heated up step by step to heat supply temperature by heat supply water supply line；And
Associated pipe and attachment.
2. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
In compression type heat pump assembly is electric drive screw or centrifugal heat pump unit.
3. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
After, boiler heats the heat supply network return water, the temperature heat temperature raising of the heat supply network return water to more than 90 DEG C, and less than 120 DEG C
Heat supply temperature after by heat supply water supply line send out data center.
4. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
After, heat supply network supplies water and extracts heat by the hot-water type absorption heat exchange unit of thermal substation, the heat supply network return water temperature is down to 25
DEG C by returning to the data center for hot water return line.
5. data center's cold and heat combined supply great temperature difference heat supply system according to claim 2 in conjunction with boiler, feature exist
In the compression heat pump includes: 45 DEG C of highest outlet temperature of conventional compact formula centrifugation heat pump unit, highest outlet temperature 55
DEG C conventional compact formula hot screw pump unit and 65 DEG C of highest outlet temperature or more of high temperature compressed formula heat pump, and wherein,
The return water step and chiller unit, 45 DEG C of outlet temperature of conventional centrifugal heat pump unit, 55 DEG C of outlet temperature of the heat supply network
Conventional compact formula hot screw pump unit, 65 DEG C of outlet temperature or more of high temperature compressed formula heat pump and boiler heat exchange, heating rises
Data center is sent out by heat supply water supply line after temperature to heat supply temperature.
6. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
In the hot water temperature of data center's heat supply water supply line outlet is 90 DEG C or more.
7. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
In the chiller unit and the compression heat pump are run simultaneously, cold and heat combined supply.
8. data center's cold and heat combined supply great temperature difference heat supply system according to claim 1 in conjunction with boiler, feature exist
In the hot-water type absorption heat exchange unit is driven by a heat supply network high-temperature-hot-water, and primary net return water temperature is than secondary network return water
Temperature is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184442.0A CN109185952A (en) | 2018-10-11 | 2018-10-11 | A kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184442.0A CN109185952A (en) | 2018-10-11 | 2018-10-11 | A kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler |
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| Publication Number | Publication Date |
|---|---|
| CN109185952A true CN109185952A (en) | 2019-01-11 |
Family
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|---|---|---|---|
| CN201811184442.0A Withdrawn CN109185952A (en) | 2018-10-11 | 2018-10-11 | A kind of data center's cold and heat combined supply great temperature difference heat supply system in conjunction with boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044101A (en) * | 2019-05-10 | 2019-07-23 | 南京工程学院 | A kind of energy-saving duck butchers and instant-frozen system and its application method |
| CN110878957A (en) * | 2019-12-23 | 2020-03-13 | 北京市热力集团有限责任公司 | Urban heat energy comprehensive utilization system and method |
-
2018
- 2018-10-11 CN CN201811184442.0A patent/CN109185952A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044101A (en) * | 2019-05-10 | 2019-07-23 | 南京工程学院 | A kind of energy-saving duck butchers and instant-frozen system and its application method |
| CN110044101B (en) * | 2019-05-10 | 2023-07-14 | 南京工程学院 | Energy-saving duck slaughtering and quick-freezing system and application method thereof |
| CN110878957A (en) * | 2019-12-23 | 2020-03-13 | 北京市热力集团有限责任公司 | Urban heat energy comprehensive utilization system and method |
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Application publication date: 20190111 |
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