HU0900749A2 - Cooling system for power plant - Google Patents

Cooling system for power plant Download PDF

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Publication number
HU0900749A2
HU0900749A2 HU0900749A HU0900749A HU0900749A2 HU 0900749 A2 HU0900749 A2 HU 0900749A2 HU 0900749 A HU0900749 A HU 0900749A HU 0900749 A HU0900749 A HU 0900749A HU 0900749 A2 HU0900749 A2 HU 0900749A2
Authority
HU
Hungary
Prior art keywords
cooling
venting
vacuum
space
mixing condenser
Prior art date
Application number
HU0900749A
Other languages
Hungarian (hu)
Other versions
HU0900749D0 (en
Inventor
Laszlo Ludvig
Beatrix Soos
Original Assignee
Gea Egi Energiagazdalkodasi Zrt
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gea Egi Energiagazdalkodasi Zrt filed Critical Gea Egi Energiagazdalkodasi Zrt
Priority to HU0900749A priority Critical patent/HU0900749A2/en
Publication of HU0900749D0 publication Critical patent/HU0900749D0/en
Publication of HU0900749A2 publication Critical patent/HU0900749A2/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/003Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B1/00Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B3/00Condensers in which the steam or vapour comes into direct contact with the cooling medium
    • F28B3/04Condensers in which the steam or vapour comes into direct contact with the cooling medium by injecting cooling liquid into the steam or vapour
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices
    • F28B9/04Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
    • F28B9/06Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices
    • F28B9/10Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases

Description

Power plant cooling system and procedure for operating it
The present invention relates to a power plant cooling system and a method for operating it.
An outline of a conventional Heller-type cooling system, also known as an indirect dry cooling system, is shown in Figure 1. The cooling system includes a mixing condenser 11 which condenses the exhausted steam from the steam turbine 10 in indirect dry cooling tower 12 by means of cooled cooling water. The cooled water heated in the mixing condenser 11 is transported to the cooling tower 12 by a motor-driven cooling water pump 16 in pipeline 15.
Heller-type refrigeration systems are known which include so-called refrigeration systems. a recuperation water turbine 18, which is installed in the cooling water branch from the cooling tower 12 to the mixing condenser 11. The main function of this is to usefully digest the lift height (drop) that is not needed for the cooling water to return to the mixing condenser 11. The power recovered from the water turbine 18 assists the operation of the engine 17 driving the cooling water pump 16, reducing the power requirement of the engine 17. The motor 17 (electric motor) driving the cooling water pump 16 has two shaft ends. It is connected to the cooling water pump 16 on one side and to the water turbine 18 on the other side, forming a common axis water machine group. Such a solution is described, for example, in Hungarian Patent Application No. 152,217.
The indirect dry cooling tower 12 provides the air flow (draft) required for heat transfer. The cover can be natural cover (chimney effect) and it can be artificial cover (ventilator cover). Known cooling towers 12 have one or more heat transfer units 13 that provide heat to be withdrawn from · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
It is passed to ambient air and the cooling system also includes 14 venting elements which Defines a vent space connected to the top of the flow space of 13 heat transfer units. Generally, heat transfer units 13, known as vertical cooling chutes 13, are known horizontally or along the perimeter of the cooling tower 12 and are grouped into sectors, wherein the cooling chambers belonging to one sector are provided with a common cooling water supply and a common venting element 14. The common venting member 14 generally comprises a venting duct connecting the tops of a sector's cooling deltas and an upwardly extending venting tube known per se.
During operation of the conventional Heller-type cooling system, the exhausted steam from the steam turbine 10 is condensed by the cooled cooling water entering the mixing condenser 11. In order to improve the efficiency of the steam cycle, a vacuum must be provided in the mixing condenser 11. The vacuum is provided by a cooling tower 12 having sufficient cooling capacity. Due to the condensation of exhausted steam, the cooling water is heated in the mixing condenser 11. The heated cooling water is removed from the vacuum space of the mixing condenser 11 by the cooling water pump 16 and then delivered to the rack tubes at the top of the cooling delta.
Ventilation rack pipes can extend up to 6-8 m above the top of the cooling deltas, and can have an operational cooling water height of 1-2 m above the top of the dip. The venting rack pipes are open at the top so that atmospheric pressure prevails over the cooling water.
The lifting height of the cooling water pump 16 is determined by raising the cooling water from the vacuum in the mixing condenser to atmospheric pressure in the rack tube, and from the water level of the mixing condenser 11 to a much higher rack tube level by hydraulically resisting the flow. The driving force for the cooling water flow to the mixing condenser 11 is the pressure difference between the atmospheric pressure and the mixing condenser 11 ···························································································• · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · This driving force overcomes the hydraulic resistance of the return branch and the mixing capacitor 11. However, the available propulsion power is significantly more than is necessary to overcome the hydraulic resistances. Usually a throttle or a more economical solution, the above recuperation water turbine 18, is used to absorb this excess propulsion.
From the above description of the conventional Heller-type cooling system, it is apparent that the cooling water pump 16 is not designed to overcome the hydraulic resistance of the entire cooling water circuit, but to a greater degree. Therefore, the water turbine 18 is needed to utilize the excess lift height (fall) relatively economically (much more economically than the throttle). However, the use of the water turbine 18 also necessarily entails a loss resulting from the loss of the cooling water pump 16 and the water turbine 18.
It is an object of the present invention to provide a power plant cooling system and a method for operating it that alleviates or eliminates the disadvantages of prior art solutions. In particular, it is an object of the present invention to provide a power plant cooling system and operating method that allows for the reduction or elimination of excess lift height (fall) in the return stream of cooling water and eliminates the need for a recuperative water turbine. This also reduces the power required to circulate the cooling water and requires a lower lifting height of the cooling water pump.
The present invention is based on the discovery that by maintaining a pressure lower than atmospheric pressure in the interior of the venting member which opens at atmospheric pressure, the objectives of the invention can be achieved.
• · · ·
The invention is thus a power plant cooling system according to claim 1 or an operating method according to claim 8. Preferred embodiments are defined in the dependent claims.
The invention by way of example! preferred embodiments are hereinafter described in the drawings, wherein
Figure 1 is a schematic diagram of a prior art Heller-type power plant cooling system, a
Figure 2 is a schematic diagram of a power plant cooling system according to a first embodiment of the invention, a
Figure 3 is an enlarged, enlarged diagram of a detail of Figure 2, a
Figure 4 is a schematic diagram of a power plant cooling system according to a second embodiment of the present invention, and
Figure 5 is a schematic drawing of another preferred embodiment.
One feature of the present invention is to create a vacuum in the rack tubes at the top of the heat transfer units 13, preferably at the top of the cooling deltas. In accordance with the present invention, vacuum means, as is customary in the art, any pressure lower than ambient pressure in the vapor space of the mixing condenser 11, for example, typically below 0.3 bar. Maintaining a vacuum or any degree of underpressure within the vent space defined by the venting member 14 has the advantage that the cooling water pump 16 does not have to overcome atmospheric pressure in the flow line and, accordingly, the driving force of the return flow cooling water is reduced.
Thus, the power plant cooling system of the present invention comprises means for maintaining the pressure in the venting space below the atmospheric pressure, preferably a means for maintaining a vacuum.
By way of example, the invention may be implemented in two particularly preferred embodiments. A common feature of these embodiments is that the device for maintaining a vacuum in the breather space includes a vacuum seal suitable for controlling the breather space of the breather element from the ambient air. valve and vacuum line connected to the venting space.
According to the first embodiment of Fig. 2, the vacuum seal valve 19 is located close to the top of the cooling delta so that only the stylized vacuum line 20 underneath is connected to the venting space below the level of the vacuum created in the aeration space. Preferably, one of the vacuum sealed valves 19 is one per sector and is preferably mounted on rack tubes forming part of the venting member 14.
The vacuum-tight valves 19 are closed at start-up of the cooling system before filling the cooling deltas, and the cooling ducts are vacuum-vacuumed through the vacuum line 20. At this point, the part of the venting element 14 under the vacuum seal valve 19 forms the space in which a pressure lower than atmospheric pressure is maintained. After filling the cooling deltas, the space below the vacuum seal 19 is filled with cooling water during operation.
Figure 3 is an enlarged portion of Figure 2 illustrating further details. A vacuum generating means 23 is provided for the vacuum line 20, preferably a so-called vacuum device. An ejector is connected which also provides vacuum to the mixing capacitor 11. The vacuum line 20 includes a controllable suction valve 21 which is open during the onset vacuum. The ball valve 22, which has a relatively lower permeability, serves as a venting means at the top of the flow area of the heat transfer unit 13 to discharge any air that may accumulate during operation.
The sectors of the heat dissipation units 13, preferably the cooling deltas, must be periodically lowered. This may be necessary, for example, during maintenance or when there is a risk of frost. In this case, the controllable motorized vacuum sealed valves 19 are opened and the vacuum conduit 20 is disconnected from the venting space by valve control, whereby the venting conduit forming part of the venting member 14 is closed. ·· ·· ···· and its associated upward venting riser pipe allows the drainage of cooling water from the cooling delta
In the second preferred embodiment shown in Figure 4, the vacuum conduit 20 is connected to the venting space, i.e. preferably to the riser tube, above the water level created by the vacuum maintained in the venting space. Vacuuming / emptying is also accomplished as described above by proper control of the vacuum sealed valves 19 and the suction valve 21.
The vacuum line 20 exerts a suction effect on the venting riser tube, raising the height of the water column in the riser tube. The venting member 14, or the stand tube preferably forming part thereof, must be applied to a height such that the suction effect does not yet suck the cooling water into the steam space of the mixing condenser 11.
It will be appreciated that the present invention may also be combined with a method of raising the water level in the mixing condenser 11; such a solution is shown in Figure 5 (for the sake of simplicity, the vacuum / vacuum generator is not shown). By raising the water level of the mixing condenser 11 it is possible to reduce or, if necessary, eliminate the additional lifting height (fall) in the return section of the cooling system.
This solution is particularly applicable to lateral, axial or upwardly directed steam turbines 10. The water level of the mixing condenser 11 can be raised by placing the mixing condenser 11 itself in a higher vertical position or by increasing the amount of water therein.
The higher the water level of the mixing condenser 11, the more the excess lift height (fall) is reduced. The water level in the mixing condenser 11 is preferably maintained above the lower tertiary point, more preferably the midpoint, more preferably the uppermost point, of the heat output unit 13.
Establishing a vacuum at the top of the cooling delta and raising the water level of the mixing condenser 11 provide a wide range of combinations for optimum utilization of local conditions. Both the solution of Figure 2 and
The solution of Figure 4 can be combined with the solution of Figure 5.
Of course, the invention is not limited to the embodiments described in detail above, but further variations and modifications are possible within the scope of the claims. For example, instead of a venting rack pipe, a venting tank in a suitable vertical position may be used

Claims (11)

  1. Claims
    A power plant cooling system comprising a mixing condenser (11), a cooling tower (12) with at least one heat output unit (13), a pipe (15) for circulating cooling water between the mixing capacitor (11) and the heat output unit (13) and a cooling water pump (16); and a venting element (14) defining a venting space connected to the top of the flow space of the heat transfer unit (13), characterized in that it comprises means for maintaining a vacuum in the venting space.
  2. Cooling system according to claim 1, characterized in that the means for maintaining a vacuum in the venting space comprises a vacuum seal valve (19) for controlling the venting space of the venting element (14) controllably from the ambient air and a vacuum line (20) connected to the venting space. ).
  3. Cooling system according to claim 2, characterized in that the vacuum conduit (20) is connected to the venting space above the water level created by the vacuum maintained in the venting space.
  4. Cooling system according to claim 2, characterized in that the vacuum conduit (20) is connected to the venting space below the level of water created by the vacuum maintained in the venting space and any air accumulating at the top of the flow area of the heat transfer unit (13) to the vacuum conduit (20). ) by means of a venting means, preferably a ball valve (22).
  5. Cooling system according to claim 3 or 4, characterized in that heat transfer units (13) are arranged along the periphery of the cooling tower (12), which are grouped into sectors, where
    The heat transfer units (13) are provided with a common cooling water supply and a common venting element (14).
  6. Cooling system according to claim 5, characterized in that the heat transfer units (13) are cooling ducts, the common venting element (14) comprises a ducting circuit connecting the tops of a sector cooling duct and an upwardly projecting venting duct, and the vacuum securing device is connected to the venting rack tube.
  7. 7. Cooling system according to any one of claims 1 to 4, characterized in that the water level in the mixing condenser (11) is maintained above the lower tertiary point, more preferably the midpoint, more preferably the upper point, of the vertical extension of the heat transfer unit (13).
  8. A method of operating a power plant cooling system comprising a mixing condenser (11), a cooling tower (12) with at least one heat output unit (13), a piping (15) for circulating cooling water between the mixing condenser (11) and the cooling unit (13) and a cooling water pump (15). 16) and a venting element (14) defining a venting space connected to the top of the flow area of the discharge unit (13), characterized in that a vacuum is maintained in the venting space.
  9. Method according to claim 8, characterized in that the vacuum in the venting space is maintained by a vacuum-tight valve (19) suitable for controlling the venting space of the venting element (14) from the ambient air and a vacuum line (20) connected to the venting space. .
  10. Method according to claim 9, characterized in that, when the cooling system is started, the vacuum-tight valve (19) is closed before a vacuum is formed in the mixing condenser (11).
  11. 11. A method according to any one of claims 1 to 3, characterized in that the water level in the mixing condenser (11) is vertical to the heat output unit (13).
    -10- .: ..... · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
HU0900749A 2009-12-03 2009-12-03 Cooling system for power plant HU0900749A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HU0900749A HU0900749A2 (en) 2009-12-03 2009-12-03 Cooling system for power plant

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
HU0900749A HU0900749A2 (en) 2009-12-03 2009-12-03 Cooling system for power plant
US13/513,658 US8756945B2 (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation
EP10809327.9A EP2507482B1 (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation
EA201200842A EA020649B1 (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation
PCT/HU2010/000135 WO2011067618A2 (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation
CN201080060729.8A CN102791962B (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation
MX2012006355A MX2012006355A (en) 2009-12-03 2010-12-02 Power plant cooling system and a method for its operation.

Publications (2)

Publication Number Publication Date
HU0900749D0 HU0900749D0 (en) 2010-01-28
HU0900749A2 true HU0900749A2 (en) 2012-01-30

Family

ID=41571258

Family Applications (1)

Application Number Title Priority Date Filing Date
HU0900749A HU0900749A2 (en) 2009-12-03 2009-12-03 Cooling system for power plant

Country Status (7)

Country Link
US (1) US8756945B2 (en)
EP (1) EP2507482B1 (en)
CN (1) CN102791962B (en)
EA (1) EA020649B1 (en)
HU (1) HU0900749A2 (en)
MX (1) MX2012006355A (en)
WO (1) WO2011067618A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011067618A2 (en) 2009-12-03 2011-06-09 Gea Egi Energiazdálkodási Zrt. Power plant cooling system and a method for its operation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013106329B4 (en) 2013-06-18 2015-04-09 Gea Energietechnik Gmbh Method and arrangement for evacuating a pipeline system
CN103791732B (en) * 2013-08-09 2015-12-23 华能国际电力股份有限公司 Thermal power plant main process equipment, auxiliary equipment cooling device and cooling means
CN104976864B (en) * 2014-04-09 2017-10-03 天华化工机械及自动化研究设计院有限公司 A kind of drying means of fine grained, high viscosity terephthalic acid (TPA)
CN104265389B (en) * 2014-10-22 2016-03-02 烟台荏原空调设备有限公司 A kind of double-work medium cycle generating system with direct contact type condenser
CN105464725A (en) * 2015-12-31 2016-04-06 武汉凯迪电力工程有限公司 Direct-air-cooling power generation system with natural ventilation cooling tower
EP3759321A1 (en) * 2018-02-28 2021-01-06 ENEXIO Hungary Zrt. Power plant and method for its operation

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1059502A (en) * 1962-09-07 1967-02-22 Parsons C A & Co Ltd Improvements in and relating to condenser systems for steam
GB1016624A (en) * 1963-09-25 1966-01-12 Parsons C A & Co Ltd Improvements in and relating to steam turbine plants and the like
US3666246A (en) * 1970-04-07 1972-05-30 Westinghouse Electric Corp Cooling system
BE790513A (en) 1971-10-25 1973-02-15 Tyeploelektroprojekt CONDENSING DEVICE FOR STEAM TURBINE THERMAL PLANTS
BE812452A (en) * 1973-03-21 1974-09-18 REFRIGERANT
US4296802A (en) * 1975-06-16 1981-10-27 Hudson Products Corporation Steam condensing apparatus
US4315404A (en) * 1979-05-25 1982-02-16 Chicago Bridge & Iron Company Cooling system, for power generating plant, using split or partitioned heat exchanger
US4506508A (en) * 1983-03-25 1985-03-26 Chicago Bridge & Iron Company Apparatus and method for condensing steam
DE3441514C2 (en) * 1984-11-14 1993-01-21 Balcke-Duerr Ag, 4030 Ratingen, De
US4632787A (en) * 1985-10-30 1986-12-30 Tippmann Robert T Evaporative heat exchanger
US4893669A (en) * 1987-02-05 1990-01-16 Shinwa Sangyo Co., Ltd. Synthetic resin heat exchanger unit used for cooling tower and cooling tower utilizing heat exchanger consisting of such heat exchanger unit
US5129456A (en) * 1987-05-08 1992-07-14 Energiagazdalkodasi Intezet Dry-operated chimney cooling tower
US4957276A (en) * 1988-02-22 1990-09-18 Baltimore Aircoil Company Trapezoidal fill sheet for low silhouette cooling tower
JP2923804B2 (en) * 1990-11-16 1999-07-26 株式会社新川 Sample adsorption holding device
US5297398A (en) * 1991-07-05 1994-03-29 Milton Meckler Polymer desiccant and system for dehumidified air conditioning
CN1389689A (en) * 2001-06-01 2003-01-08 徐云生 Peak-regulating ground source heat pump system for accumulating energy with valley power
DE10214183C1 (en) * 2002-03-28 2003-05-08 Siemens Ag Drive mechanism, for refrigeration, has absorption refrigeration machine connected to steam turbine, operated by steam extracted from turbine, preferably from low pressure part of turbine
CN101063595B (en) * 2006-04-26 2010-05-12 北京国电华北电力工程有限公司 SCAL indirect air cooling system used for building 600MW air cooling set
HU0900749A2 (en) 2009-12-03 2012-01-30 Gea Egi Energiagazdalkodasi Zrt Cooling system for power plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011067618A2 (en) 2009-12-03 2011-06-09 Gea Egi Energiazdálkodási Zrt. Power plant cooling system and a method for its operation

Also Published As

Publication number Publication date
EP2507482B1 (en) 2013-10-09
WO2011067618A8 (en) 2012-09-13
CN102791962B (en) 2014-12-31
EP2507482A2 (en) 2012-10-10
US8756945B2 (en) 2014-06-24
WO2011067618A2 (en) 2011-06-09
WO2011067618A3 (en) 2012-02-02
HU0900749D0 (en) 2010-01-28
EA201200842A1 (en) 2012-12-28
MX2012006355A (en) 2012-09-07
US20130055737A1 (en) 2013-03-07
EA020649B1 (en) 2014-12-30
CN102791962A (en) 2012-11-21

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FC4A Lapse of provisional application due to refusal