CN104979960A - External evaporation-type cooling system for generator motor - Google Patents
External evaporation-type cooling system for generator motor Download PDFInfo
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- CN104979960A CN104979960A CN201510412336.3A CN201510412336A CN104979960A CN 104979960 A CN104979960 A CN 104979960A CN 201510412336 A CN201510412336 A CN 201510412336A CN 104979960 A CN104979960 A CN 104979960A
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- generator motor
- liquid phase
- evaporator
- condenser
- compressor
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Abstract
The invention provides an external evaporation-type cooling system for a generator motor, which comprises an evaporator, a compressor, a condenser and an expansion valve, wherein the evaporator is connected with the compressor; the compressor is connected with the condenser; the condenser is connected with the expansion valve; and the expansion valve is connected with the evaporator. Effluent hot air with a temperature of ta1 by the generator motor exchanges heat with a liquid phase refrigerant in the evaporator, the liquid phase refrigerant becomes low-pressure saturated refrigerant vapor, and the hot air of the generator motor is cooled to ta2; adiabatic compression is carried out on the low-pressure saturated refrigerant via the compressor, and high-pressure superheated refrigerant vapor is generated; the high-pressure superheated refrigerant vapor exchanges heat with cooling water in the condenser, and a supercooled liquid phase refrigerant is generated; after adiabatic expansion is carried out on the supercooled liquid phase refrigerant via the expansion valve, a low-pressure saturated liquid phase refrigerant is generated; and the low-pressure saturated liquid phase refrigerant flows in the evaporator for cooling the effluent hot air by the generator motor.
Description
Technical field
The present invention relates to the cooling field of generator motor, particularly relate to a kind of cooling system of generator motor, is a kind of outer evaporating type cooling system of generator motor concretely.
Background technology
Pumped storage is as accumulation power supply best at present, can network load is low time unnecessary electric energy, change the high value electric energy of electrical network peak reality into, also be applicable to peak regulation, phase modulation, the cycle of stable power system and voltage, and there is emergency duty, improve the function of thermoelectricity, nuclear power efficiency in electric power system.
But, along with the lifting of pump-storage generator single-machine capacity, unit generation motor and the not good problem of thrust bearing cooling effect increasingly severe, the restraining factors that cooling problem has become power plant safety stable operation, capacity of power unit promotes further of the too high problem of generator motor thrust bearing shoe temperature, generator motor.At present, pumped storage machine generally adopts cooling air mode, its cooling process is that the hot blast flowed out from electricity generation and electromotion machine stator flows into stator peripheral aerial cooler to cooling water heat release, and cooled air again inflow generator is inner, circulating cooling like this.
But the major defect of this existing technology has:
1, waste energy, the heat that generator motor produces is by after absorption of air, through aerial cooler to cooling water drainage thermal discharge, finally be discharged in environment and go, according to single-machine capacity 300,000 kilowatts of units, electricity generation and electromotion engine efficiency 98%, then add cooling water supply conveying merit, namely there are at least 6000 Kilowatt of Energy not add utilization directly to go discharged in environment, cause a large amount of energy wastes;
2, the temperature that the existing type of cooling supplies water by cooling affects larger, pump-storage generator cooling water is from draft tube, during summer peak meeting, upper and lower water temperature of reservoir is higher, the temperature of cooling water is higher, the heat transfer temperature difference of cooling water and generator hot blast is little, causes generator motor and the increasing influenced by ambient temperature of thrust bearing cooling effect thereof, affects the safe and stable operation of unit.
Summary of the invention
Affect by cooling water comparatively large to solve the existing type of cooling, and the problem of energy waste can be caused, the invention provides a kind of waste heat of generator motor that utilizes and carry out the cooling system freezed.
The embodiment of the present invention provides a kind of outer evaporating type cooling system of generator motor, comprising: evaporator, compressor, condenser and expansion valve; Described evaporator connects described compressor, and described compressor connects described condenser, and described condenser connects described expansion valve, and described expansion valve connects described evaporator; The temperature that described generator motor flows out is t
a1hot-air in described evaporator with liquid phase refrigerant heat exchange, described liquid phase refrigerant becomes the saturated refrigerant vapour of low pressure, and the hot-air of described generator motor is cooled to t
a2; The saturated cold-producing medium of described low pressure, through described compressor adiabatic compression, generates high pressure superheater refrigerant vapour; Described high pressure superheater refrigerant vapour in described condenser with cooling water heat exchange, generate supercooled liquid phase cold-producing medium; Described supercooled liquid phase cold-producing medium, after described expansion valve adiabatic expansion, generates the saturated liquid phase refrigerant of low pressure; Described low pressure saturated liquid phase flow of refrigerant enters described evaporator, cools the hot-air that described generator motor flows out.
Further, in one embodiment, the temperature of the cooling water in described condenser in heat transfer process by t
w1rise to t
w2.
Further, in one embodiment, connected by pipeline between described evaporator, compressor, condenser and expansion valve.
By the outer evaporating type cooling system of generator motor of the present invention, the adaptability of generator motor cooling effect to ambient temperature can be improved, can effectively reduce generator motor, thrust bearing temperature simultaneously, improve the fail safe of unit operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the outer evaporating type cooling system of the generator motor of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the structural representation of the outer evaporating type cooling system of the generator motor of the embodiment of the present invention.As shown in the figure, the outer evaporating type cooling system of the generator motor of the present embodiment comprises: evaporator, compressor, condenser and expansion valve; Described evaporator connects described compressor, and described compressor connects described condenser, and described condenser connects described expansion valve, and described expansion valve connects described evaporator.Connected by pipeline between described evaporator, compressor, condenser and expansion valve.
The temperature that described generator motor flows out is t
a1hot-air be p with state in described evaporator
4, t
4liquid phase refrigerant heat exchange, it is p that described liquid phase refrigerant becomes state
1, t
1the saturated refrigerant vapour (p of low pressure
1=p
4), the hot-air of described generator motor is cooled to t
a2;
State is p
1, t
1the saturated cold-producing medium of low pressure through described compressor adiabatic compression, generation state is p
2, t
2high pressure superheater refrigerant vapour;
State is p
2, t
2high pressure superheater refrigerant vapour in described condenser with cooling water heat exchange, generation state is p
3, t
3supercooled liquid phase cold-producing medium, the temperature of the cooling water in condenser in heat transfer process by t
w1rise to t
w2;
State is p
3, t
3supercooled liquid phase cold-producing medium after described expansion valve adiabatic expansion, generation state is p
4, t
4the saturated liquid phase refrigerant of low pressure;
State is p
4, t
4low pressure saturated liquid phase flow of refrigerant enter described evaporator, the hot-air that described generator motor flows out is cooled, completes and once circulate.
Adopt cooling means of the present invention, the outlet cold wind temperature of aerial cooler can realize the temperature of 15-35 DEG C of scope under most bad working environments in summer and regulate, greatly improve the adaptability of generator motor cooling effect to ambient temperature and the stability of unit operation, in addition owing to adopting the present invention, can effectively reduce generator motor, thrust bearing temperature, improve the fail safe of unit operation.
Apply specific embodiment in the present invention to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. an outer evaporating type cooling system for generator motor, is characterized in that, described system comprises: evaporator, compressor, condenser and expansion valve;
Described evaporator connects described compressor, and described compressor connects described condenser, and described condenser connects described expansion valve, and described expansion valve connects described evaporator;
The temperature that described generator motor flows out is t
a1hot-air in described evaporator with liquid phase refrigerant heat exchange, described liquid phase refrigerant becomes the saturated refrigerant vapour of low pressure, and the hot-air of described generator motor is cooled to t
a2;
The saturated cold-producing medium of described low pressure, through described compressor adiabatic compression, generates high pressure superheater refrigerant vapour;
Described high pressure superheater refrigerant vapour in described condenser with cooling water heat exchange, generate supercooled liquid phase cold-producing medium;
Described supercooled liquid phase cold-producing medium, after described expansion valve adiabatic expansion, generates the saturated liquid phase refrigerant of low pressure;
Described low pressure saturated liquid phase flow of refrigerant enters described evaporator, cools the hot-air that described generator motor flows out.
2. the outer evaporating type cooling system of generator motor according to claim 1, is characterized in that, the temperature of the cooling water in described condenser in heat transfer process by t
w1rise to t
w2.
3. the outer evaporating type cooling system of generator motor according to claim 1, is characterized in that, is connected between described evaporator, compressor, condenser and expansion valve by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412336.3A CN104979960A (en) | 2015-07-14 | 2015-07-14 | External evaporation-type cooling system for generator motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412336.3A CN104979960A (en) | 2015-07-14 | 2015-07-14 | External evaporation-type cooling system for generator motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104979960A true CN104979960A (en) | 2015-10-14 |
Family
ID=54276169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510412336.3A Pending CN104979960A (en) | 2015-07-14 | 2015-07-14 | External evaporation-type cooling system for generator motor |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3838581A (en) * | 1973-10-29 | 1974-10-01 | Carrier Corp | Refrigerator apparatus including motor cooling means |
| US4669279A (en) * | 1985-03-19 | 1987-06-02 | Ebara Corporation | Motor cooling apparatus for refrigerator |
| CN2297689Y (en) * | 1996-08-10 | 1998-11-18 | 李记开 | Solar refrigerating device |
| US20030154735A1 (en) * | 2002-02-15 | 2003-08-21 | Wurth Lukas M. | Cooling of electronics in an electrically driven refrigerant system |
| CN1463067A (en) * | 2002-05-30 | 2003-12-24 | 中国科学院电工研究所 | Evaporation cooled device for stator of steam turbo-generator and hydraulic generator |
| CN101728896A (en) * | 2008-10-28 | 2010-06-09 | 西门子公司 | Arrangement for cooling of an electrical machine |
| CN204967540U (en) * | 2015-07-14 | 2016-01-13 | 国家电网公司 | Outer evaporation formula cooling system of generator motor |
-
2015
- 2015-07-14 CN CN201510412336.3A patent/CN104979960A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3838581A (en) * | 1973-10-29 | 1974-10-01 | Carrier Corp | Refrigerator apparatus including motor cooling means |
| US4669279A (en) * | 1985-03-19 | 1987-06-02 | Ebara Corporation | Motor cooling apparatus for refrigerator |
| CN2297689Y (en) * | 1996-08-10 | 1998-11-18 | 李记开 | Solar refrigerating device |
| US20030154735A1 (en) * | 2002-02-15 | 2003-08-21 | Wurth Lukas M. | Cooling of electronics in an electrically driven refrigerant system |
| CN1463067A (en) * | 2002-05-30 | 2003-12-24 | 中国科学院电工研究所 | Evaporation cooled device for stator of steam turbo-generator and hydraulic generator |
| CN101728896A (en) * | 2008-10-28 | 2010-06-09 | 西门子公司 | Arrangement for cooling of an electrical machine |
| CN204967540U (en) * | 2015-07-14 | 2016-01-13 | 国家电网公司 | Outer evaporation formula cooling system of generator motor |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20151014 |