EP1529333A1 - Dynamoelectric generator - Google Patents
Dynamoelectric generatorInfo
- Publication number
- EP1529333A1 EP1529333A1 EP03787560A EP03787560A EP1529333A1 EP 1529333 A1 EP1529333 A1 EP 1529333A1 EP 03787560 A EP03787560 A EP 03787560A EP 03787560 A EP03787560 A EP 03787560A EP 1529333 A1 EP1529333 A1 EP 1529333A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- generator
- cooling water
- cooling
- water circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Definitions
- the present invention relates to the field of power plant technology. It relates to a dynamoelectric generator according to the preamble of claim 1.
- Such a generator is e.g. known from US-A-5,883,448.
- the power output of dynamoelectric generators depends on the permissible internal heating of the components. So-called insulation classes limit the absolute value of temperatures. Utilization according to class B or F is usual, which corresponds to a permissible component temperature of 130 or 155 ° C. Exceeding the permissible component temperatures results in accelerated component aging and thus reduced availability and loss of service life.
- an air-cooled generator for example, can suck in ambient air (so-called open ventilation, OV), force through its components, and release it to the environment when heated.
- OV open ventilation
- the Generator follow such a gas turbine power, which also increases with lower ambient air.
- a closed air circuit inside the generator is often chosen and the power loss is transferred to a separate cooling water circuit via an air-water heat exchanger (generator cooler) (Totally Enclosed Water-Air Cooling, TEWAC).
- TEWAC totally Enclosed Water-Air Cooling
- curves A show the dependence of the cooling air inlet temperature on the cold water Input temperature
- curves B represent the dependency of the generator output power on the cooling air input temperature
- the relationship between the generator output power and the cold water input temperature can be determined in an exemplary manner on the path marked with two arrows.
- the cooling water can e.g. in turn can be cooled back in a closed circuit with cooling towers.
- the object is achieved by the entirety of the features of claim 1.
- the essence of the invention is to provide in the cooling water circuit in front of the input of the generator cooler a refrigeration-generating refrigeration unit which extracts heat from the cooling water before entering the generator cooler.
- the cooling water temperature is thus reduced by the upstream cooling unit.
- Retrofitting in existing systems to adapt to increased turbine output is done by simply inserting the cooling unit or a corresponding heat exchanger before the water enters the generator cooler. No intervention is necessary on the generator itself.
- Generators for new systems with a standard stem of the refrigeration unit can be made more cost-effective overall. There are advantages in terms of size and mechanical short-circuit torque on the shaft with a slightly lower efficiency.
- an inexpensive type of cooling of the generator can be pulled up to higher outputs, which has a positive effect on the generator price.
- the cooling can be carried out by refrigeration systems of various functions, for example absorption or adsorption refrigeration systems and compression refrigeration systems. Surprisingly, when using electrically driven compression refrigeration systems, the additional electrical power required is several times smaller than the additional output achieved the generator terminals.
- a preferred embodiment of the generator according to the invention which is characterized by particular simplicity, is characterized in that the cooling unit has a cooling generator operated with electrical energy, that the generator is part of a power plant, and that the electrical energy required for the operation of the cooling generator is taken from a power plant's own demand network.
- a bypass water circuit is provided for the dissipation of the waste heat from the cooling unit, which branches off from the cooling water circuit after the recooling device and flows back into the cooling water circuit behind the cooling water outlet from the generator coolers. This further simplifies the construction of the additional cooling.
- the arrangement according to the invention becomes particularly compact if, according to another embodiment, a heat exchanger for absorbing the waste heat of the refrigeration unit is arranged in the bypass water circuit, and if the bypass water circuit is structurally integrated with the heat exchanger in the refrigeration unit.
- the refrigeration unit is connected to a controller which only switches the refrigeration unit on when a predetermined threshold value is exceeded, the generator output being a criterion, a Generator component temperature or the ambient temperature or the cold water temperature can be provided.
- cooling unit is inserted into the cooling water circuit in such a way that failure of the cooling unit does not hinder the cooling water circuit. In this way, a revision can be carried out on the refrigeration unit, the generator continuing to run with the “capability” that can be achieved without a refrigeration unit.
- an anti-freeze in particular glycol
- the cooling water temperature at the outlet of the cooling unit can in principle be driven in the negative temperature range, which can significantly expand the operating range if necessary.
- FIG. 2 shows, in a simplified circuit diagram, a preferred exemplary embodiment for a gas- or air-cooled generator according to the
- FIG. 2 shows a preferred exemplary embodiment for a gas- or air-cooled generator according to the invention within a power plant 10 in a simplified circuit diagram.
- the generator 11 with its generator axis 28 is only indicated as a box.
- Air or another suitable gas e.g., circulates within the closed housing of the generator 11 in one or more gas circuits 12, 12 '. Hydrogen.
- the gas circuits 12, 12 ' usually pass through the rotor and stator of the generator 11.
- the gas heated by the heat loss in the interior of the generator 11 is cooled back in one or more generator coolers 13,..., 16.
- the generator coolers 13, .., 16 are designed as gas-water heat exchangers and are part of an outer cooling water circuit 17a, b. 2, the generator cooler 13, .., 16 are shown lying in parallel.
- other types of interconnection such as a series connection or a mixed series-parallel connection are also conceivable.
- the heated cooling water coming from the generator coolers 13, .., 16 is pumped by a pump 18 through a recooling device 19, for example a cooling tower or the like, where it is recooled and returned to the generator cooler 13, .. , 16 fed.
- a recooling device 19 for example a cooling tower or the like
- a refrigeration-generating refrigeration unit 20 is inserted, which the cooling water before entering the generator cooler 13, .., 16 heat withdraws or cools it down.
- the cooling unit 20 only acts on selected partial flows of the cooling water circuit 1 a, b, which flow through the generator coolers 13,... 16.
- the cooling takes place, for example, via a cooling generator 22 provided in the cooling unit 20, which releases the cooling via a heat exchanger 24 to the cooling water of the cooling water circuit 17b and the heat generated via a further heat exchanger 26 to a bypass water circuit 21, which is provided by the cooling water circuit 17a branches off in front of the cooling unit 20 and from behind the cooling water outlet the generator coolers 13, .., 16 opens again into the cooling water circuit 17b.
- a further refrigeration generator 23 can be provided which, if necessary, releases refrigeration via a further heat exchanger 25 if the one refrigeration generator 22 should fail.
- two refrigerators can work simultaneously if necessary.
- the generator 11 can continue to be operated with its original output if the cooling unit 20 should ever fail because the water flow through the heat exchangers 24, 25 remains undisturbed.
- an open cooling circuit eg river water
- the refrigeration unit 20 is operated by electrical energy 27, which is preferably taken from an in-house supply network of the power plant 10.
- the refrigeration unit 20 is advantageously controlled by a controller 29, which only switches the refrigeration unit 20 on when a predetermined threshold value is exceeded.
- a threshold value of the generator power or a threshold value of the ambient temperature can be provided as the threshold value.
- the cooling unit can advantageously be regulated in such a way that the regulation is adapted to the operating state of the generator 1.
- the use of an ad or absorption refrigeration system is also possible, which is then operated mainly by a coupled heat flow instead of electrical energy. This can originate, for example, from the hot gas part of the generator.
- the cooling water temperature is lowered in the upstream cooling unit 20.
- Retrofitting in existing systems to adapt to increased turbine output is accomplished by simply inserting the refrigeration unit 20 before the water enters the generator coolers 13,... 16. No intervention is necessary on the generator 11 itself.
- Generators 11 for new systems with a standard stem of the refrigeration unit 20 can be carried out more cost-effectively. There are advantages in terms of efficiency and mechanical short-circuit torque on the shaft.
- an inexpensive type of cooling of the generator can be pulled up to higher outputs, which has a positive effect on the generator price.
- the additional electrical power requirement for the refrigeration unit 20 operating as a compression refrigeration machine is surprisingly several times smaller than the additional output achieved at the generator terminals (waste or adsorption refrigeration systems can, on the other hand, be operated very economically by using waste heat).
- the result is a multiplication factor of the order of 50 and larger, by which the achievable additional power of the generator 11 is greater than the required electrical connection power of the refrigeration unit 20.
- recooling device e.g. cooling tower
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH14102002 | 2002-08-16 | ||
CH14102002 | 2002-08-16 | ||
PCT/CH2003/000520 WO2004017494A1 (en) | 2002-08-16 | 2003-07-30 | Dynamoelectric generator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1529333A1 true EP1529333A1 (en) | 2005-05-11 |
Family
ID=31722381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03787560A Withdrawn EP1529333A1 (en) | 2002-08-16 | 2003-07-30 | Dynamoelectric generator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1529333A1 (en) |
AU (1) | AU2003246504A1 (en) |
WO (1) | WO2004017494A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017220977A1 (en) | 2017-11-23 | 2019-05-23 | Siemens Aktiengesellschaft | Power plant with cooling system, method for operating such a power plant, method for modifying a power plant |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8978395B2 (en) | 2010-08-18 | 2015-03-17 | Remy Technologies, L.L.C. | Reject heat driven absorption cooling cycle |
DE102014211590A1 (en) | 2014-06-17 | 2015-12-17 | Siemens Aktiengesellschaft | Gas turbine generator cooling |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH349339A (en) * | 1955-05-14 | 1960-10-15 | Licentia Gmbh | System for dissipating heat loss from liquid-cooled electrical machines and apparatus |
DE3131286A1 (en) * | 1981-08-05 | 1983-02-24 | Siemens AG, 1000 Berlin und 8000 München | Arrangement for cooling a gas-cooled or liquid-cooled electrical machine |
JPS58116044A (en) * | 1981-12-28 | 1983-07-11 | Toshiba Corp | Coolant circulating device for rotary electric machine |
JP2801998B2 (en) * | 1992-10-12 | 1998-09-21 | 富士通株式会社 | Electronic equipment cooling device |
DE19645272A1 (en) * | 1996-11-02 | 1998-05-07 | Asea Brown Boveri | Gas-cooled electrical machine |
NL1013129C2 (en) * | 1999-09-24 | 2001-03-27 | Lagerwey Windturbine B V | Windmill. |
-
2003
- 2003-07-30 WO PCT/CH2003/000520 patent/WO2004017494A1/en not_active Application Discontinuation
- 2003-07-30 EP EP03787560A patent/EP1529333A1/en not_active Withdrawn
- 2003-07-30 AU AU2003246504A patent/AU2003246504A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2004017494A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017220977A1 (en) | 2017-11-23 | 2019-05-23 | Siemens Aktiengesellschaft | Power plant with cooling system, method for operating such a power plant, method for modifying a power plant |
WO2019101440A1 (en) | 2017-11-23 | 2019-05-31 | Siemens Aktiengesellschaft | Power plant having a cooling system, method for operating such a power plant, method for modifying a power plant |
US11637480B2 (en) | 2017-11-23 | 2023-04-25 | Siemens Energy Global GmbH & Co. KG | Power plant having a cooling system, method for operating such a power plant, method for modifying a power plant |
Also Published As
Publication number | Publication date |
---|---|
AU2003246504A1 (en) | 2004-03-03 |
WO2004017494A1 (en) | 2004-02-26 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20050215 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE ES GB IT |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHLEUSSINGER, ARMIN Inventor name: JOHO, REINHARD Inventor name: DRUBEL, OLIVER |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHLEUSSINGER, ARMIN Inventor name: JOHO, REINHARD Inventor name: DRUBEL, OLIVER |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20150203 |