CN113963896A - Transformer waste heat utilization device and method based on heat pipe - Google Patents
Transformer waste heat utilization device and method based on heat pipe Download PDFInfo
- Publication number
- CN113963896A CN113963896A CN202111198602.9A CN202111198602A CN113963896A CN 113963896 A CN113963896 A CN 113963896A CN 202111198602 A CN202111198602 A CN 202111198602A CN 113963896 A CN113963896 A CN 113963896A
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- heat pipe
- transformer
- heat
- condenser
- water
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/18—Liquid cooling by evaporating liquids
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a transformer waste heat utilization device based on a heat pipe, which comprises the heat pipe and a compression heat pump, wherein the compression heat pump comprises an evaporator, a compressor, a condenser and an expansion valve; the evaporator, the compressor, the condenser and the expansion valve are sequentially connected end to form a closed structure, the evaporation section of the heat pipe is obliquely inserted into an oil tank of the oil-immersed transformer, the condensation section of the heat pipe is positioned above the evaporation section and is inserted into the evaporator of the compression heat pump, the water inlet of the condenser is connected with the return water of the fan coil, and the water outlet of the condenser is connected with the water supply of the fan coil; the device can be used for utilizing the waste heat of the transformer based on the heat pipe. The invention can efficiently utilize the waste heat of the transformer to replace the electric heating in the station, improve the energy utilization efficiency of the power grid link and reduce the carbon emission; the device provided by the invention can improve the heat dissipation capacity of the transformer and effectively improve the operation safety performance of the oil-immersed transformer.
Description
Technical Field
The invention relates to the technical field of transformer waste heat utilization, in particular to a heat pipe-based transformer waste heat utilization device and a heat pipe-based transformer waste heat utilization method.
Background
The power transformer is one of core devices in a power transmission system, heat is generated due to iron loss and copper loss in the power transformer during operation, for example, a 220kV transformer substation, the loss of a single main transformer in a heavy-load day can reach 10GJ, and the heat is directly dissipated in an outdoor environment through insulating oil to cause waste heat resources. The transformer substation is used as an important ring of power transmission, energy-saving management is not performed on the transformer substation in a targeted manner, and the problems that energy is not recycled, energy-saving measures are not in place and the like exist.
The traditional heating mode of transformer substation relies on hanging the electric heater or adopts the air conditioner to reach the heating purpose, but the electric energy is as high-grade energy, directly is used for the behavior that heating system is the low efficiency utilization energy, also belongs to the energy waste to a certain extent. If the working condition requirement of the insulating oil temperature of the transformer can be combined, the waste heat dissipated by the transformer loss can be reasonably recovered, on one hand, the oil temperature of the transformer can be effectively reduced, and the safe operation of the transformer is ensured; on the other hand, the potential of the residual heat of the transformer is fully explored, the comprehensive energy efficiency of the system is improved, and the purposes of energy conservation and emission reduction are achieved.
At present, the cooling mode of the transformer mainly comprises self-cooling, air cooling and water cooling, wherein the self-cooling oil-immersed transformer is a transformation device which is generally adopted at home at present, the self-cooling oil-immersed transformer drives oil circulation by means of expansion and contraction of the oil, insulating oil flows into a radiator through a connecting oil pipe for cooling, but the flow rate of the insulating oil is extremely low, and the heat is uniformly dissipated in the environment, so that the waste heat is difficult to recover in a centralized mode.
Therefore, based on these problems, it is necessary to research a heat pipe-based transformer waste heat utilization device and a utilization method thereof, which can efficiently recover the transformer waste heat, improve the comprehensive energy utilization efficiency of the system, effectively improve the heat dissipation capability of the oil-immersed transformer, and ensure the safe operation of the transformer.
Disclosure of Invention
The invention aims to design a heat pipe-based transformer waste heat utilization device and a utilization method, which can efficiently recover transformer waste heat, improve the comprehensive energy utilization efficiency of a system, effectively improve the heat dissipation capacity of an oil-immersed transformer and ensure the safe operation of the transformer.
The scheme of the invention is as follows:
the transformer waste heat utilization device based on the heat pipe comprises the heat pipe and a compression heat pump, wherein the compression heat pump comprises an evaporator, a compressor, a condenser and an expansion valve;
the evaporator, the compressor, the condenser and the expansion valve are sequentially connected end to form a closed structure, the evaporation section of the heat pipe is obliquely inserted into an oil tank of the oil-immersed transformer, the condensation section of the heat pipe is positioned above the evaporation section and is inserted into the evaporator of the compression heat pump, a water inlet of the condenser is connected with return water of the fan coil, and a water outlet of the condenser is connected with water supply of the fan coil.
Furthermore, the heat pipe can adopt methanol, ethanol or water as working media.
The method for utilizing the residual heat of the transformer based on the heat pipe by using the device comprises the steps of obliquely inserting the evaporation section of the heat pipe into an oil tank of the oil-immersed transformer, enabling the condensation section of the heat pipe to be higher than the evaporation section, inserting the condensation section into the evaporator of the compression heat pump, connecting the water inlet of the condenser with the water return pipeline of the fan coil, and connecting the water outlet of the condenser with the water supply pipeline of the fan coil, so that the water return is heated to obtain heating hot water.
The invention has the advantages and positive effects that:
the invention provides a transformer waste heat utilization method organically combining heat pipes and heat pump technologies aiming at the problems of difficult waste heat collection, low waste heat utilization efficiency and the like of the traditional oil-immersed transformer, the method can be applied to substations of 110kV and above, the transformer waste heat can be efficiently utilized to replace in-station electric heating, the energy utilization efficiency of a power grid link is improved, and the carbon emission is reduced; the device provided by the invention can improve the heat dissipation capacity of the transformer and effectively improve the operation safety performance of the oil-immersed transformer.
Drawings
Fig. 1 is a schematic structural diagram of a heat pipe-based transformer waste heat utilization device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a heat pipe according to an embodiment of the present invention;
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the heat pipe based transformer waste heat utilization apparatus provided in this embodiment includes a heat pipe 2 and a compression heat pump 3, where the compression heat pump 3 includes an evaporator 5, a compressor 6, a condenser 7, and an expansion valve 8;
the evaporator 5, the compressor 6, the condenser 7 and the expansion valve 8 are sequentially connected end to form a closed structure, the evaporation section of the heat pipe 2 is obliquely inserted into the oil tank 1 of the oil-immersed transformer, the condensation section of the heat pipe 2 is positioned above the evaporation section and is inserted into the evaporator 5 of the compression heat pump 3, the water inlet of the condenser 7 is connected with the return water of the fan coil 4, and the water outlet of the condenser 7 is connected with the water supply of the fan coil 4.
The heat pipe 2 can adopt methanol, ethanol or water as working media.
The method for utilizing the residual heat of the transformer based on the heat pipe by using the device comprises the steps of obliquely inserting the evaporation section of the heat pipe into an oil tank of the oil-immersed transformer, enabling the condensation section of the heat pipe 2 to be higher than the evaporation section, inserting the condensation section into the evaporator 5 of the compression heat pump 3, connecting the water inlet of a condenser 7 with the water return pipeline of the fan coil 4, and connecting the water outlet of the condenser 7 with the water supply pipeline of the fan coil 4, so that the water return is heated to obtain heating hot water.
In this embodiment, the oil-immersed transformer is a 220kV self-cooling oil-immersed transformer, the temperature rise of oil during operation is about 20-50 ℃, the no-load loss is about 109kW, the load loss (rated capacity) is about 676kW, the thermal load of a 220kV transformer substation in winter is about 60kW, and the waste heat of a main transformer can bear the heating thermal load in all the substations.
For example, in this embodiment, the evaporation section of the heat pipe is obliquely inserted into the oil tank of the oil-immersed transformer, and is in full contact with the insulating oil, so as to cool the oil temperature to 40 ℃, and the condensation section of the heat pipe is located above the evaporation section and is connected to the evaporator 5 of the compression heat pump 3; the high-temperature insulating oil is used as a heat source to heat the evaporation section of the heat pipe, so that the liquid working medium in the heat pipe 2 is heated to generate phase change, and the working medium steam moves upwards to enter the condensation section. The condensation section of the heat pipe is connected with an evaporator of the compression heat pump 3, working medium steam in the heat pipe releases heat and condenses to generate phase change again, and liquid working medium moves downwards under the influence of gravity and enters the evaporation section to complete working medium circulation in the heat pipe;
the evaporator 5 of the compression heat pump 3 is connected with the compressor 6, the compressor 6 is connected with the condenser 7, the condenser 7 is sequentially connected with the expansion valve 8 and the evaporator 5 to realize working medium circulation, and the compression heat pump 3 utilizes the low-temperature waste heat in the transformer to heat the fan coil to supply hot water by consuming electric energy.
Under the working condition of waste heat recovery, the coefficient of performance COP of the compression heat pump is 5, in the embodiment, the waste heat of a 48kW main transformer is recovered for winter heating of a transformer substation at the cost of 12kW electric power consumption, and the requirement of in-station heating can be met even under the working condition of no-load operation of the transformer.
The method for utilizing the transformer waste heat based on the heat pipe technology has the advantages that the annual average power consumption is about 4 thousands of kWh, and compared with the annual average power consumption of 12 thousands of kWh in the current heating scheme that an air conditioner is adopted by a transformer substation to supply electricity for heating, the annual power consumption can be saved by at least 8 thousands of kWh.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. The transformer waste heat utilization device based on the heat pipe is characterized by comprising the heat pipe and a compression heat pump, wherein the compression heat pump comprises an evaporator, a compressor, a condenser and an expansion valve;
the evaporator, the compressor, the condenser and the expansion valve are sequentially connected end to form a closed structure, the evaporation section of the heat pipe is obliquely inserted into an oil tank of the oil-immersed transformer, the condensation section of the heat pipe is positioned above the evaporation section and is inserted into the evaporator of the compression heat pump, a water inlet of the condenser is connected with return water of the fan coil, and a water outlet of the condenser is connected with water supply of the fan coil.
2. The transformer waste heat utilization device based on the heat pipe as claimed in claim 1, wherein the heat pipe can use methanol, ethanol or water as working medium.
3. Method for utilizing transformer waste heat based on heat pipe by using the device of claim 1 or 2,
the evaporation section of the heat pipe is obliquely inserted into an oil tank of the oil-immersed transformer, the condensation section of the heat pipe is higher than the evaporation section of the heat pipe, the condensation section of the heat pipe is inserted into an evaporator of the compression heat pump, a water inlet of the condenser is connected with a water return pipeline of the fan coil, and a water outlet of the condenser is connected with a water supply pipeline of the fan coil, so that return water is heated to obtain heating hot water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198602.9A CN113963896A (en) | 2021-10-14 | 2021-10-14 | Transformer waste heat utilization device and method based on heat pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198602.9A CN113963896A (en) | 2021-10-14 | 2021-10-14 | Transformer waste heat utilization device and method based on heat pipe |
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| Publication Number | Publication Date |
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| CN113963896A true CN113963896A (en) | 2022-01-21 |
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| CN202111198602.9A Pending CN113963896A (en) | 2021-10-14 | 2021-10-14 | Transformer waste heat utilization device and method based on heat pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654770A (en) * | 2022-10-25 | 2023-01-31 | 国网黑龙江省电力有限公司电力科学研究院 | Temperature regulation and control system for supplying heat by using waste heat of transformer |
Citations (6)
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|---|---|---|---|---|
| US6212892B1 (en) * | 1998-07-27 | 2001-04-10 | Alexander Pinkus Rafalovich | Air conditioner and heat pump with dehumidification |
| KR100731510B1 (en) * | 2006-05-02 | 2007-06-22 | 송미숙 | Cooling and heating fan assembly of water temperature accumulation type |
| CN203799786U (en) * | 2014-03-11 | 2014-08-27 | 苏变（徐州）电气有限公司 | Heat dissipation device of oil immersed transformer |
| CN110255855A (en) * | 2019-07-19 | 2019-09-20 | 扬州大学 | A kind of double Cooling and Heat Source heat pump sludge at low temperature anhydration systems and its application method with waste heat recycling |
| US20200158389A1 (en) * | 2018-11-15 | 2020-05-21 | National Taipei University Of Technology | Integrated water-cooled air conditioning device |
| CN210801598U (en) * | 2019-10-10 | 2020-06-19 | 中铁第一勘察设计院集团有限公司 | Water heater for recycling waste heat of subway transformer |
-
2021
- 2021-10-14 CN CN202111198602.9A patent/CN113963896A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212892B1 (en) * | 1998-07-27 | 2001-04-10 | Alexander Pinkus Rafalovich | Air conditioner and heat pump with dehumidification |
| KR100731510B1 (en) * | 2006-05-02 | 2007-06-22 | 송미숙 | Cooling and heating fan assembly of water temperature accumulation type |
| CN203799786U (en) * | 2014-03-11 | 2014-08-27 | 苏变（徐州）电气有限公司 | Heat dissipation device of oil immersed transformer |
| US20200158389A1 (en) * | 2018-11-15 | 2020-05-21 | National Taipei University Of Technology | Integrated water-cooled air conditioning device |
| CN110255855A (en) * | 2019-07-19 | 2019-09-20 | 扬州大学 | A kind of double Cooling and Heat Source heat pump sludge at low temperature anhydration systems and its application method with waste heat recycling |
| CN210801598U (en) * | 2019-10-10 | 2020-06-19 | 中铁第一勘察设计院集团有限公司 | Water heater for recycling waste heat of subway transformer |
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| 李娟;金苏敏;: "带有组合式热管蒸发器的生活浊水余热热泵热水器的稳态仿真研究", 流体机械, no. 08 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654770A (en) * | 2022-10-25 | 2023-01-31 | 国网黑龙江省电力有限公司电力科学研究院 | Temperature regulation and control system for supplying heat by using waste heat of transformer |
| CN115654770B (en) * | 2022-10-25 | 2023-09-08 | 国网黑龙江省电力有限公司电力科学研究院 | Temperature regulation and control system for heating by utilizing waste heat of transformer |
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