CN110836412A - Distributed heating system - Google Patents
Distributed heating system Download PDFInfo
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- CN110836412A CN110836412A CN201810942740.5A CN201810942740A CN110836412A CN 110836412 A CN110836412 A CN 110836412A CN 201810942740 A CN201810942740 A CN 201810942740A CN 110836412 A CN110836412 A CN 110836412A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 226
- 238000007789 sealing Methods 0.000 claims description 34
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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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
- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
- F24D3/1066—Distributors for heating liquids
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
The invention relates to a distributed heating system, comprising: secondary network hot water circulation module, user side hot water circulation module, first heat supply pipeline, second heat supply pipeline and return water pipe, secondary network hot water circulation module's output passes through first heat supply pipeline with second heat supply pipeline with user side hot water circulation module's input is connected, secondary network hot water circulation module's input with return water pipe's output is connected, user side hot water circulation module's output with return water pipe's input is connected. According to the distributed heat supply system provided by the invention, the project initial construction investment and the system operation cost are reduced by adopting the secondary network hot water circulation module, the same water supply and return water pipes in most heat supply areas and the distributed control system, the water conservancy imbalance phenomenon of the heat supply system can be effectively solved, and the unconditional grid-connected operation of multiple heat sources is realized.
Description
Technical Field
The invention relates to the field of town heating, in particular to a distributed heating system.
Background
At present, the town central heating mainly adopts an indirect heating form of cogeneration central heating. The first-network heat supply water which obtains heat from the heat source heats the second-network water through the heat exchange station, and the heated second-network water is conveyed to the heat user and is subjected to indoor heat supply through the tail end heat dissipation equipment. The temperature difference of the one-network heat supply in the mode is about 40 ℃, the temperature difference of the two-network heat supply is 10-15 ℃, the mode is the most common heat supply mode in the heat supply industry at present, and the phenomenon of uneven cold and heat of a heat user is reduced to a certain extent. However, as can be known from heat transfer science, the higher the temperature of the heating circulation water is, the larger the temperature difference of heating is, the more the heat energy is conveyed, and the two-network low-temperature and small-temperature-difference conveying mode not only increases the initial investment of the pipeline, but also increases the power consumption of the circulation water pump.
Disclosure of Invention
Therefore, a distributed heating system needs to be provided for solving the problems of high initial investment of pipelines and large power consumption of circulating water pumps.
A distributed heating system, said distributed heating system comprising:
the system comprises a secondary network hot water circulation module, a user side hot water circulation module, a first heat supply pipeline, a second heat supply pipeline and a water return pipeline;
the output end of the secondary network hot water circulation module is connected with the input end of the user side hot water circulation module through the first heat supply pipeline and the second heat supply pipeline;
the input end of the secondary network hot water circulation module is connected with the output end of the water return pipeline;
and the output end of the user side hot water circulation module is connected with the input end of the water return pipeline.
In one embodiment, the input end of the second heat supply pipeline is connected with the first heat supply pipeline.
In one embodiment, the system further comprises a primary network hot water circulation module, and the primary network hot water circulation module is connected with the secondary network hot water circulation module and used for providing heat heated by the secondary network hot water circulation module.
In one embodiment, the secondary network hot water circulation module comprises a water replenishing pump, a check valve and a circulating water pump;
the output end of the water replenishing pump is connected with the input end of the check valve;
the output end of the check valve is connected with the input end of the circulating water pump;
the input end of the circulating water pump is connected with the output end of the water return pipeline, and the output end of the circulating water pump is connected with the input end of the secondary network hot water circulating module.
In one embodiment, the user-side hot water circulation module comprises a first user-side unit, a second user-side unit and a third user-side unit;
the input end of the first user side unit is connected with the first heat supply pipeline, and the output end of the first user side unit is connected with the water return pipeline;
the input end of the second user side unit is connected with the first heat supply pipeline, and the output end of the second user side unit is connected with the first heat supply pipeline;
the input end of the third user side unit is connected with the second heat supply pipeline, and the output end of the third user side unit is connected with the first heat supply pipeline.
In one embodiment, the first user-side unit comprises an electric control device, a water supply pipe ball valve, a water return pipe ball valve, an electric regulating valve, a water mixing pump and a soft sealing ball valve;
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the first heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the water return pipeline.
In one embodiment, the second user-side unit comprises an electric control device, a water supply pipe ball valve, a water return pipe ball valve, an electric regulating valve, a water mixing pump and a soft sealing ball valve;
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the first heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the first heat supply pipeline.
In one embodiment, the third user-side unit comprises an electric control device, a water supply pipe ball valve, a water return pipe ball valve, an electric regulating valve, a water mixing pump and a soft sealing ball valve;
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the second heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the water return pipeline.
In one embodiment, the user-side hot water circulation module further comprises a sensor unit, and the sensor unit collects outdoor temperature, indoor temperature, pressure signals, flow signals and temperature compensation information.
In one embodiment, the electric control device controls the water mixing pump and the electric regulating valve to regulate the water mixing proportion according to the information collected by the sensor unit.
According to the distributed heat supply system provided by the invention, the project initial construction investment and the system operation cost are reduced by adopting the secondary network hot water circulation module, the same water supply and return water pipes in most heat supply areas and the distributed control system, the water conservancy imbalance phenomenon of the heat supply system can be effectively solved, and the unconditional grid-connected operation of multiple heat sources is realized.
Drawings
FIG. 1 is a schematic diagram of a distributed heating system according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a hot water circulation module of the secondary network of FIG. 1;
fig. 3 is a schematic diagram of the subscriber-side unit of fig. 1.
Detailed Description
To facilitate an understanding of the present invention, a distributed heating system will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the distributed heating system are shown in the accompanying drawings. However, the distributed heating system may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure of the distributed heating system is more thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the distributed heating system is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to 3, the distributed heating system includes: the system comprises a primary network hot water circulation module 10, a secondary network hot water circulation module 20, a user side hot water circulation module 30, a first heat supply pipeline 40, a second heat supply pipeline 50 and a water return pipeline 60.
The primary network hot water circulation module 10 is connected with the secondary network hot water circulation module 20, and is used for providing hot water for the secondary network hot water circulation module 20.
The output end of the secondary network hot water circulation module 20 is connected with the input end of the user side hot water circulation module 30 through the first heat supply pipeline 40 and the second heat supply pipeline 50, the secondary network hot water circulation module 20 comprises a plate heat exchanger 210, the plate heat exchanger 210 is used for heating the heat of the primary network hot water circulation module 10 to a target temperature, and the heated hot water is transmitted to the user side hot water circulation module 30 through the first heat supply pipeline 40 and the second heat supply pipeline 50. In one embodiment, the input of the second heating pipeline 50 is connected to the first heating pipeline 40.
In this embodiment, the secondary network hot water circulation module 20 uses the plate heat exchanger 210 to use the heat of the primary network hot water circulation module 10 to heat the hot water transmitted by the secondary network hot water circulation module 20 to a target temperature. It is understood that the plate heat exchanger 210 may also be a jacketed heat exchanger, a submerged coil heat exchanger, a spray heat exchanger, a double tube plate heat exchanger, or other heat exchangers, and only needs to heat hot water to a target temperature. In one embodiment, the target temperature is 80-90 ℃.
Optionally, an input end of the secondary network hot water circulation module 20 is connected to an output end of the water return pipe 60, and an output end of the user-side hot water circulation module 30 is connected to an input end of the water return pipe 60. The output end of the user side hot water circulation module 30 delivers the circulated hot water to the secondary network hot water circulation module 20 through the return pipe 60.
The secondary network hot water circulation module 20 includes a make-up pump 230, a check valve 240, and a circulation pump 220.
Optionally, an output end of the make-up water pump 230 is connected to an input end of the check valve 240, and the make-up water pump 230 is used for supplementing water lost by the distributed heating system.
Optionally, the output end of the check valve 240 is connected to the input end of the circulating water pump 220, and the check valve 240 is used for preventing a water hammer phenomenon from generating and damaging the circulating water pump.
Optionally, an input end of the water circulation pump 220 is connected to an output end of the water return pipe 60, an output end of the water circulation pump is connected to an input end of the secondary network hot water circulation module 20, and the water circulation pump 220 is configured to deliver hot water to the user-side hot water circulation module 30.
Optionally, the user-side hot water circulation module 30 includes a first user-side unit 310, a second user-side unit 320, and a third user-side unit 330. In one embodiment, the first user-side unit 310 has an input connected to the first heat supply pipeline 40 and an output connected to the return pipeline 60; the output end of the second user side unit 320 is connected with the first heat supply pipeline 40, and the output end is connected with the first heat supply pipeline 40; the third user side unit 330 has an input end connected to the second heat supply pipeline 50 and an output end connected to the first heat supply pipeline 40.
Specifically, the first user-side unit 310 includes an electric control device 31, a water supply pipe ball valve 34, a water return pipe ball valve 35, an electric control valve 33, a mixing pump 32, and a soft sealing ball valve.
The electric control device 31 is connected with the water mixing pump 32 and the electric control valve 33, the input end of the water supply pipe ball valve 34 is connected with the first heat supply pipeline 40, the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve, the output end of the soft sealing ball valve is connected with the input end of the water mixing pump 32, one end of the electric control valve 33 is connected with the output end of the soft sealing ball valve, the other end of the electric control valve is connected with the input end of the water return pipe ball valve 35, and the output end of the water return pipe ball valve 35 is connected with the. In one embodiment, the first user-side unit 310 is located at the front end of the user-side hot water circulation module 30, near the secondary network hot water circulation module 20.
Specifically, the second user-side unit 320 includes an electric control device 31, a water supply pipe ball valve 34, a water return pipe ball valve 35, an electric control valve 33, a mixing pump 32, and a soft sealing ball valve.
The electric control device 31 is connected with the water mixing pump 32 and the electric control valve 33, the input end of the water supply pipe ball valve 34 is connected with the first heat supply pipeline 40, the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve, the output end of the soft sealing ball valve is connected with the input end of the water mixing pump 32, one end of the electric control valve 33 is connected with the output end of the soft sealing ball valve, the other end of the electric control valve is connected with the input end of the water return pipe ball valve 35, and the output end of the water return pipe ball valve 35 is connected with the first heat. In one embodiment, the second user-side unit 320 is located between the first user-side unit 310 and the third user-side unit 330.
Specifically, the third user-side unit 330 includes an electric control device 31, a water supply pipe ball valve 34, a water return pipe ball valve 35, an electric control valve 33, a mixing pump 32, and a soft sealing ball valve.
The electric control device 31 is connected with the water mixing pump 32 and the electric control valve 33, the input end of the water supply pipe ball valve 34 is connected with the second heat supply pipeline 50, the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve, the output end of the soft sealing ball valve is connected with the input end of the water mixing pump 32, one end of the electric control valve 33 is connected with the output end of the soft sealing ball valve, the other end of the electric control valve is connected with the input end of the water return pipe ball valve 35, and the output end of the water return pipe ball valve 35 is connected with the. In one embodiment, the third user-side unit 330 is located at the end of the user-side hot water circulation module 30, near the secondary network hot water circulation module 20.
Optionally, the user-side hot water circulation module 30 further includes a sensor unit. Specifically, the sensor unit collects outdoor temperature, indoor temperature, pressure signals, flow signals, and temperature compensation information.
In one embodiment, the electric control device 31 controls the mixing pump 32 and the electric control valve 33 to adjust the mixing ratio according to the information collected by the sensor unit.
Distributed heating system sets up according to the demand of using heat during the heating user side hot water circulation module 30's water supply temperature, monitors user's indoor temperature and operational data feedback through sensor unit, right the water supply pipe valve reaches return pipe valve is adjusted to suitable aperture to confirm economical reasonable water supply temperature.
During heating, the electric control device 31 adjusts the mixing pump 32 and the electric control valve 33 according to the information collected by the sensor unit. When the outdoor temperature is low, the heat consumption of the user-side hot water circulation module 30 is high, and the temperature of the supplied heat and the returned water is low, the electric control device 31 controls the opening degree of the electric regulating valve 33 to be reduced, the flow of the hot water extracted from the pipeline by the water mixing pump 32 is increased, and the heat consumption of the user-side hot water circulation module 30 is ensured after water mixing; when the outdoor temperature is high, the heat consumption of the user side hot water circulation module 30 is low, and the heat supply return water temperature is high, the electric control device 31 controls the opening of the electric control valve 33 to be increased, the water mixing pump 32 extracts the hot water flow from the pipeline to be reduced, the outdoor temperature is monitored, the distributed heat supply system can pre-judge the heat demand of the user side hot water circulation module 30, the heat supply quality is guaranteed, the user side hot water circulation module 30 supplies heat as required, and the energy consumption is saved.
According to the distributed heat supply system provided by the invention, the secondary network hot water circulation module 20 is adopted to supply and return water in the same pipe and perform distributed variable frequency control through most heat supply areas, so that the initial construction investment of projects and the system operation cost are reduced, the water conservancy imbalance phenomenon of the heat supply system can be effectively solved, and the unconditional grid-connected operation of multiple heat sources is realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A distributed heating system, said distributed heating system comprising: the system comprises a secondary network hot water circulation module, a user side hot water circulation module, a first heat supply pipeline, a second heat supply pipeline and a water return pipeline;
the output end of the secondary network hot water circulation module is connected with the input end of the user side hot water circulation module through the first heat supply pipeline and the second heat supply pipeline;
the input end of the secondary network hot water circulation module is connected with the output end of the water return pipeline;
and the output end of the user side hot water circulation module is connected with the input end of the water return pipeline.
2. The distributed heating system of claim 1, wherein an input of the second heating pipeline is connected to the first heating pipeline.
3. The distributed heating system according to claim 1, further comprising a primary network hot water circulation module, wherein the primary network hot water circulation module is connected with the secondary network hot water circulation module for providing heat for heating by the secondary network hot water circulation module.
4. The distributed heating system of claim 1, wherein the secondary grid hot water circulation module comprises a make-up pump, a check valve, and a circulating water pump;
the output end of the water replenishing pump is connected with the input end of the check valve;
the output end of the check valve is connected with the input end of the circulating water pump;
the input end of the circulating water pump is connected with the output end of the water return pipeline, and the output end of the circulating water pump is connected with the input end of the secondary network hot water circulating module.
5. A distributed heating system according to claim 1, wherein the user side hot water circulation module comprises a first user side unit, a second user side unit and a third user side unit,
the input end of the first user side unit is connected with the first heat supply pipeline, and the output end of the first user side unit is connected with the water return pipeline;
the input end of the second user side unit is connected with the first heat supply pipeline, and the output end of the second user side unit is connected with the first heat supply pipeline;
the input end of the third user side unit is connected with the second heat supply pipeline, and the output end of the third user side unit is connected with the first heat supply pipeline.
6. A distributed heating system according to claim 5, wherein the first user-side unit comprises an electrical control device, a water supply pipe ball valve, a water return pipe ball valve, an electrical regulating valve, a mixing pump, and a soft-sealing ball valve,
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the first heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the water return pipeline.
7. The distributed heating system according to claim 5, wherein the second user-side unit comprises an electrical control device, a water supply pipe ball valve, a water return pipe ball valve, an electrical regulating valve, a water mixing pump, and a soft seal ball valve;
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the first heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the first heat supply pipeline.
8. The distributed heating system of claim 5, wherein the third user-side unit comprises an electrical control device, a water supply pipe ball valve, a water return pipe ball valve, an electrical regulating valve, a water mixing pump, and a soft seal ball valve;
the electric control device is connected with the water mixing pump and the electric regulating valve and is used for controlling the water mixing pump and the electric regulating valve;
the input end of the water supply pipe ball valve is connected with the second heat supply pipeline, and the output end of the water supply pipe ball valve is connected with the input end of the soft sealing ball valve;
the output end of the soft sealing ball valve is connected with the input end of the water mixing pump;
one end of the electric regulating valve is connected with the output end of the soft sealing ball valve, and the other end of the electric regulating valve is connected with the input end of the water return pipe ball valve;
the output end of the water return pipe ball valve is connected with the water return pipeline.
9. A distributed heating system according to any of claims 6 to 8, wherein the user side hot water circulation module further comprises a sensor unit that collects outdoor temperature, indoor temperature, pressure signals, flow signals, temperature compensation information.
10. A distributed heating system according to any one of claims 9, wherein the electrical control device controls the mixing pump and the electrical control valve to adjust the mixing ratio according to the information collected by the sensor unit.
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| CN103994487A (en) * | 2014-05-26 | 2014-08-20 | 宋春节 | Long-distance single pipe distributed hybrid heating system |
| CN204987576U (en) * | 2015-09-08 | 2016-01-20 | 中节能先导城市节能有限公司 | Energy -conserving transmission and distribution system of hierarchical formula self -loopa water resource heat pump regional energy |
| CN107543240A (en) * | 2016-06-24 | 2018-01-05 | 山东飞洋节能技术有限公司 | A kind of heating system subregion conversion equipment |
| CN206282521U (en) * | 2016-11-25 | 2017-06-27 | 天津城建大学 | Central heating comprehensive experimental system |
| CN206637695U (en) * | 2017-04-12 | 2017-11-14 | 吉林英格博莱环保设备有限公司 | Intelligent multifunction mixes water thermal power plant unit |
| CN206959658U (en) * | 2017-06-21 | 2018-02-02 | 三高阀门集团有限公司 | Fully-automatic intelligent plate-type heat-exchange unit |
| CN207555731U (en) * | 2017-11-01 | 2018-06-29 | 山东奥翔电力工程设计咨询有限公司 | A kind of centralized domestic hot-water supply system suitable for Heating Period |
| CN108006785A (en) * | 2017-12-29 | 2018-05-08 | 柳箭 | Hydraulic energy recuperation formula heat-exchange unit |
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Application publication date: 20200225 Assignee: Yongji Dun'an Thermal Power Co.,Ltd. Assignor: SHANDONG AOXIANG POWER ENGINEERING DESIGN CONSULTING Co.,Ltd. Contract record no.: X2023980036333 Denomination of invention: Distributed Hydronics Granted publication date: 20220318 License type: Common License Record date: 20230612 |