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System and method for chilling inlet air for gas turbines
RE44815 System and method for chilling inlet air for gas turbines
Patent Drawings:

Inventor: Pierson
Date Issued: March 25, 2014
Application:
Filed:
Inventors:
Assignee:
Primary Examiner: Rodriguez; William H
Assistant Examiner:
Attorney Or Agent: Haynes and Boone, LLP
U.S. Class: 60/772; 60/39.182; 60/39.53; 60/728; 60/775; 62/175
Field Of Search: ;60/728; ;60/773; ;60/775; ;60/39.3; ;60/39.53; ;60/266; ;60/267; ;60/39.182; ;62/175; ;62/332
International Class: F02C 1/00; F02G 3/00
U.S Patent Documents:
Foreign Patent Documents:
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Holman, J. P., Thermodynamics, Second Edition; McGraw-Hill Book Company, New York, 1974, pp. 450-455. cited by applicant.
Ondryas, Igor S., et al.; Options in Gas Turbine Power Augmentation Using Inlet Air Chilling, presented at the Gas Turbine and Aeroengine Congress and Exposition, Jun. 11-14, 1990, Brussels, Belgium. cited by applicant.
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1996 ASHRAE Handbook No. 2; Heating, Ventilating, and Air-Conditioning Systems and Equipment; American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Inch-Pound Edition, Atlanta GA, 48 pgs. cited by applicant.
1996 ASHRAE Handbook No. 3; HVAC Systems and Equipment, I-P Edition, 15 pgs. cited by applicant.
Clark, Kenneth M, P.E, et al., The Application of Thermal Energy Storage for District Cooling and Combustion Turbine Inlet Air Cooling, Proceedings of the International District Energy Association 89.sup.th Annual Conference, San Antonio, TX, Jun.1998, p. 85. cited by applicant.
Coad, William J., P.E., A Fundamental Perspective on Chilled Water Systems, McClure Engineering Associates, St. Louis MO, 12 pgs. cited by applicant.
Ferreira, Joao de Jesus, Cold Production From Heat, Energie-Cites/Ademe, Climaespaco S.A., 1998, 4 pgs. cited by applicant.
Dharmadhikari, Shashi, Ph.D. et al., Contribution of Stratified Thermal Storage of Cost-Effective Trigeneration Project, ASHRAE Transactions: Symposia, 106 ASHRAE Trans., pt. 2, MN-00-16-2 (2000) 8 pgs. cited by applicant.
Gidwani, B. N., et al, Optimization of Chilled Water Systems, ESL-1E-87-09-27; Proceedings from the Ninth Annual Industrial Energy Technology Conference, Houston, TX, Sep. 16-18, 1987, 6 pgs. cited by applicant.
Hartman, Thomas B., P.E., Design Issues of Variable Chilled-Water Flow Through Chillers; The Hartman Company, Marysville, WA, SA-96-12-2, 5 pgs. cited by applicant.
Industrial Refrigeration Rotary Screw Process Chillers, Dunham-Bush, Form No. 6061-1A, 44 pgs. cited by applicant.
Jolly, Sanjeev, P.E., et al., Capacity Enhancement of ABB 11N1 with Thermal Energy Storage, Power Gen International, New Orleans, LA, Nov. 30-Dec. 2, 1999, 8 pgs. cited by applicant.
Mornhed, G., et al., Innovations in District Heating and Cooling 1984-1994 and Their Economic Impact; ASHRAE Transactions; Symposia, CH-95-10-4, 6 pgs. cited by applicant.
Ondryas, I.S., et al., Options in Gas Turbine Power Augmentation Using Inlet Air Chilling, Journal of Engineering for Gas Turbines and Power, Apr. 1991, vol. 113 / 203, 9 pgs. cited by applicant.
Polimeros, George, Energy Cogeneration Handbook, Industrial Press Inc., New York, NY, 1981, 17 pgs. cited by applicant.
Punwani, Dharam V., et al., A Hydrid System for Combustion Turbine Inlet Air Cooling at the Calpine Clear Lake Cogeneration Plant in Pasadena, TX, Jul. 13, 2000 Draft for ASHRAE Review, ASHRAE Winter Meeting Atlanta, GA, Jan. 2001, 17 pgs. cited byapplicant.
Purpose of System, Section 1, jb1393.kmc, 48 pgs. cited by applicant.
Reddy, Agami, Ph.D., P.E., et al., Determining Long-Term Performance of Cool Storage Systems From Short-Term Tests, ASHRAE Research Project 1004; Literature Review, Preliminary Methodology Description and Final Site Selection, Nov. 1997, RevisedFeb. 1998, 200 pgs. cited by applicant.
Reeves, et al., Commercial Cool Storage Design Guide, GPU Service Corporation Parsippany, NJ, EPRI EM-3981 Project 2036-3, Final Report May 1985, 258 pgs. cited by applicant.
Stewart, William E., Jr., ASHRAE Research Project Report RP-993; Improved Fluids for Naturally Stratified Chilled Water Storage Systems, Aproval; Jul. 1998; 2012 ASHRAE www.ashrae.org , Jul. 1998, 30 pgs. cited by applicant.
Stewart, William E., Jr., Design Guide: Combustion Turbine Inlet Air Cooling Systems, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1999,35 pgs. cited by applicant.
Traine Applications Engineering Manual, Multiple-Chiller-System Design and Control, Trane, SYS-APM001-EN (Mar. 2001), Mar. 2001, 100 pgs. cited by applicant.
Vogelsang, Marlene, CoolTools Chilled Water Plant Design and specification Guide, Pacific Gas and Electric Company, Report #CT-016-May 2000, 302 pgs. cited by applicant.
Water-Cooled Reciprocating Packaged Water Chillers, WHR 017EW through WHR 210EW, 60 Hertz, Refrigerant R-22, Product Manual, 1997 McQuay International, 62 pgs. cited by applicant.
1991 ASHRAE Handbook; Heating, Ventilating, and Air-Conditioning Applications, Inch-Pound Edition; American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle, N.E. Atlanta, GA 30329, pp. 1-39.12. cited byapplicant.
Chiller Plant Design Application Guide AG 31-003, McQuay Air Conditioning, Revised Feb. 2001, pp. 1-22. cited by applicant.
Grimm, Niles R., et al, HVAC Systems and Components Handbook, Second Edition, Section 6; 8 pages. cited by applicant.
Jolly, Sanjeev, P.E., et al., Inlet Air Cooling for a Frame 7EA based Combined Cycle Power Plant, Presented at Power-Gen International, Dallas, Texas, Dec. 9-11, 1997, pp. 1-12. cited by applicant.
Turbine Inlet Chilling System; Qaseem Power Plant Extension; GE International Power Systems, Sep. 1997;pp. 1-22. cited by applicant.
Ondryas, Igor et al. , Options in Gas Turbine Power Augmentation using Inlet Air Chilling, Jun. 11, 1990, The American Society of Mechanical Engineers, Article No. 90-GT-250, pp. 1-10. cited by examiner.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Chilled Water Storage; Design Guide for Cooled Thermal Storage; cover page; pp. 4-1 to 4-7; 4-10 to 4-18; 4-24 to 4-26. cited by applicant.
Ondryas, et al., Options in Gas Turbine Power Augmentation Using Inlet Air Chilling, presented at the Gas Turbine and Aeroengine Congress and Exposition, Jun. 11-14, 1990, Brussels, Belgium. cited by applicant.
Holman, J.P., Thermodynamics, McGraw Hill Kogakusha, 2nd ed., Tokyo 1974, pp. 452-453. cited by applicant.









Abstract: .[.A method for cooling inlet air to a gas turbine is provided. For example, a method is described including passing inlet air through a cooling coil that includes an opening for receiving the inlet air and that is operably connected to a gas turbine power plant. The gas turbine power plant may include at least one gas turbine, and at least one gas turbine inlet which receives the inlet air. The method may further include passing circulating water through a water chiller at a first flow rate to reduce the temperature of the circulating water, the water chiller including a conduit through which the circulating water is capable of passing and passing the circulating water having the first flow rate through the cooling coil in an amount sufficient to lower the temperature of the inlet air. Additionally, the method may include reducing the flow rate of the circulating water passing through the water chiller, passing the circulating water through a water chiller at a second flow rate to reduce the temperature of the circulating water, the second flow rate being lower than the first flow rate, and passing the circulating water having the second flow rate through the cooling coil in an amount sufficient to lower the temperature of the inlet air..]. .Iadd.A method and system for cooling inlet air to a gas turbine is provided. In order to maintain a desired level of efficiency for a gas turbine plant, water is passed through a chiller to lower the water temperature. The cooled water is then circulated through coils disposed in the inlet air of the gas turbine, thereby cooling the inlet air to the gas turbine. The system may include a thermal energy storage tank for storing chilled water prior to circulation through the coils. The system may also utilize an air temperature set point selected to achieve a desired output or to meet load requirement for the gas turbine plant. The temperature or flow rate of the cooled water may be adjusted to achieve the selected air temperature set point. .Iaddend.
Claim: What is claimed is:

1. A method of chilling inlet air to a combined cycle gas turbine plant, comprising: a. a gas turbine that includes a gas turbine inlet and a steam turbine; b. providing asystem of circulating liquid chilling water including a chilling system that includes a first chiller; c. passing at least a portion of the liquid chilling water through the first chiller, the liquid chilling water passing through the first chillerbeing lowered to a first temperature; d. providing an inlet air chiller, comprising a cooling coil through which liquid chilling water passes, for lowering the temperature of inlet air being fed to the gas turbine compressor through heat transferbetween the liquid chilling water passing through the cooling coil and the inlet air, wherein the inlet air chiller provides a liquid chilling water temperature rise; e. chilling the inlet air by directing the liquid chilling water through the coolingcoil of the inlet air chiller to make heat transfer contact between the liquid chilling water and the inlet air; and f. controlling the leaving air temperature off the cooling coil to maintain a leaving air temperature slightly above the dew pointtemperature of the ambient air to maintain high efficiency on the power plant.

2. The method of claim 1, wherein an amount of circulating chilled water flow rate is varied to the cooling coil to maintain a leaving air temperature slightly above the dew point temperature of the ambient air.

3. The method of claim 1, wherein the temperature of the circulating chilled water is varied to the cooling coil to maintain a leaving air temperature slightly above the dew point temperature of the ambient air.

4. The method of claim 1, wherein a circulating chilled water flow rate or the circulating chilled water temperature is varied to the cooling coil to maintain a relative humidity off the coil to below about 95% to about 99% RH.

5. A method of chilling inlet air to a gas turbine, comprising: a. a gas turbine that includes a gas turbine inlet; b. providing a system of circulating liquid chilling water solution wherein the water solution contains water plus an additivewhich is capable of reducing the freezing point of water; c. passing at least a portion of the liquid chilling water solution through a first chiller and then a second chiller, the liquid chilling water solution passing through the first chiller beinglowered to a first temperature; and the liquid chilling water solution passing through the second chiller being lowered to a second temperature which is lower than the first; d. providing an inlet air chiller, comprising a cooling coil through whichthe liquid chilling water solution passes, for lowering the temperature of inlet air being fed to the gas turbine compressor through heat transfer between the liquid chilling water solution passing through the cooling coil and the inlet air, and e.chilling the inlet air by directing the liquid chilling water solution through the cooling coil of the inlet air chiller to make heat transfer contact between the liquid chilling water and the inlet air.

6. The method of claim 5, wherein the chilling water solution comprises an additive of sodium nitrate in an amount sufficient to decrease the freezing temperature of the chilling water solution.

7. The method of claim 5, wherein the chilling water solution comprises an additive of potassium formate in an amount sufficient to decrease the freezing temperature of the chilling water solution.

.Iadd.8. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir and the cool water port is in fluid communication with the second portion of reservoir; d. a first water circulation system comprising a first chillerand a first pump system, the first chiller having a first chiller inlet and outlet, wherein the outlet of the first chiller is in fluid communication with the cool water port, and the inlet of the first chiller is in fluid communication with the warmwater port of the thermal energy storage tank, the first pump system having a first pump inlet and first pump outlet, wherein the first pump system is in fluid communication with the first chiller, e. wherein the first pump inlet is in fluidcommunication with the second portion of the reservoir and the liquid water outlet of the air cooler is in fluid communication with the first portion of the reservoir, and f. a second water circulation system comprising a variable speed pump systemhaving a variable speed pump, wherein variable speed pump system is in fluid communication with the second portion of the reservoir and the liquid water inlet of the air cooler. .Iaddend.

.Iadd.9. The system of claim 8, wherein the first and second water circulation systems comprise water disposed therein, wherein the water in the first water circulation system has a first temperature at the inlet of the first chiller and asecond temperature, cooler than the first temperature, at the outlet to the first chiller. .Iaddend.

.Iadd.10. The system of claim 9, further comprising an additive disposed in the water within the first and second water circulation systems, wherein the additive is capable of reducing the freezing point of water. .Iaddend.

.Iadd.11. The system of claim 8, wherein the first water circulation system further comprises a second chiller arranged in parallel with the first chiller. .Iaddend.

.Iadd.12. The system of claim 8, wherein the first water circulation system further comprises a second chiller arranged in series with the first chiller. .Iaddend.

.Iadd.13. The system of claim 8, wherein the first chiller is a duplex chiller. .Iaddend.

.Iadd.14. The system of claim 8, wherein the variable speed pump system comprises at least two variable speed pumps in parallel. .Iaddend.

.Iadd.15. The system of claim 8, further comprising a sensor system having at least one sensor adjacent the air outlet of the air cooler and a control system disposed to alter a characteristic of the second water circulation system based on thesensor system. .Iaddend.

.Iadd.16. The system of claim 15, wherein the sensor comprises a temperature sensor. .Iaddend.

.Iadd.17. The system of claim 15, wherein the sensor comprises a relative humidity sensor. .Iaddend.

.Iadd.18. The system of claim 15, wherein the sensor system comprises a relative humidity sensor and a temperature sensor. .Iaddend.

.Iadd.19. The system of claim 15, wherein the control system is disposed to alter the temperature of water in the second water circulation system based on the sensor system. .Iaddend.

.Iadd.20. The system of claim 15, wherein the control system is disposed to alter the flow rate of water within the second water circulation system based on the sensor system. .Iaddend.

.Iadd.21. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir and the cool water port is in fluid communication with the second portion of reservoir; and d. a first water circulation system comprising a firstchiller having a first chiller inlet and outlet and a second chiller having a second chiller inlet and outlet, wherein the outlet of the first chiller is in fluid communication the inlet of the second chiller such that the first and second chillers arearranged in series, the outlet of the second chiller is in fluid communication with the cool water port, and the inlet of the first chiller is in fluid communication with the warm water port of the thermal energy storage tank, e. wherein the liquid waterinlet of the air cooler is in fluid communication with the second portion of the reservoir and the liquid water outlet of the air cooler is in fluid communication with the first portion of the reservoir. .Iaddend.

.Iadd.22. The system of claim 21, wherein the first water circulation system comprises water disposed therein, wherein the water has a first temperature at the inlet of the first chiller and a second temperature, cooler than the firsttemperature, at the inlet to the second chiller and the water has a third temperature at the second chiller outlet that is cooler than the second temperature. .Iaddend.

.Iadd.23. The system of claim 22, further comprising an additive disposed in the water within the first water circulation system, wherein the additive is capable of reducing the freezing point of water. .Iaddend.

.Iadd.24. The system of claim 21, further comprising a second water circulation system, the second water circulation system comprising a variable flow pump system, the variable flow pump system having a pump inlet and pump outlet, wherein thepump outlet is in fluid communication with the liquid water inlet of the air cooler. .Iaddend.

.Iadd.25. The system of claim 24, wherein the variable flow pump system comprises a variable speed pump. .Iaddend.

.Iadd.26. The system of claim 24, wherein the variable flow pump system comprises at least two variable speed pumps in parallel. .Iaddend.

.Iadd.27. The system of claim 21, wherein the first and second chillers together comprise a single duplex chiller. .Iaddend.

.Iadd.28. The system of claim 21, further comprising a sensor system having at least one sensor adjacent the air outlet of the air cooler and a control system disposed to alter a characteristic of the water in the water circulation system basedon the sensor system. .Iaddend.

.Iadd.29. The system of claim 28, wherein the sensor comprises a temperature sensor. .Iaddend.

.Iadd.30. The system of claim 28, wherein the sensor comprises a relative humidity sensor. .Iaddend.

.Iadd.31. The system of claim 28, wherein the sensor system comprises a relative humidity sensor and a temperature sensor. .Iaddend.

.Iadd.32. The system of claim 28, wherein the control system is disposed to alter the temperature of water in the water circulation system based on the sensor system. .Iaddend.

.Iadd.33. The system of claim 28, wherein the control system is disposed to alter the flow rate of water within the water circulation system based on the sensor system. .Iaddend.

.Iadd.34. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; and c. a chilled water circulation system comprising a first duplex chiller and a second duplex chiller, each of the duplex chillers having an inlet and outlet, wherein the outlet of the firstduplex chiller is in fluid communication with the water inlet of the second duplex chiller, the outlet of the second duplex chiller is in fluid communication with the air cooler, and the inlet of the first duplex chiller is in fluid communication withthe water outlet of the air cooler. .Iaddend.

.Iadd.35. The system of claim 34, the chilled water circulation system further comprising water disposed therein, wherein the water in the chilled water circulation system has a first temperature at the inlet of the first duplex chiller and asecond temperature cooler than the first temperature at the first duplex chiller outlet. .Iaddend.

.Iadd.36. The system of claim 35, further comprising an additive disposed in the water within the water circulation system, wherein the additive is capable of reducing the freezing point of water. .Iaddend.

.Iadd.37. The system of claim 34, wherein at least one of the duplex chillers comprises a first chiller and a second chiller. .Iaddend.

.Iadd.38. The system of claim 34, further comprising a condenser water circuit, wherein each of the first and second duplex chillers has a condenser water inlet and outlet, wherein the condenser water inlet of the first duplex chiller is influid communication with the condenser water outlet of the second duplex chiller, whereby water flow through the condenser water circuit is in a direction opposite of chilled water flow through the first chiller inlet and outlet. .Iaddend.

.Iadd.39. The system of claim 34, further comprising a variable flow pump system, the variable flow pump system having a pump inlet and pump outlet, wherein the pump outlet is in fluid communication with the liquid water inlet of the aircooler. .Iaddend.

.Iadd.40. The system of claim 39, wherein the variable flow pump system comprises a variable speed pump. .Iaddend.

.Iadd.41. The system of claim 39, wherein the variable flow pump system comprises at least two variable speed pumps in parallel. .Iaddend.

.Iadd.42. The system of claim 34, further comprising a sensor system having at least one sensor adjacent the air outlet of the air cooler and a control system disposed to alter a characteristic of the water in the water circulation system basedon the sensor system. .Iaddend.

.Iadd.43. The system of claim 42, wherein the sensor comprises a temperature sensor. .Iaddend.

.Iadd.44. The system of claim 42, wherein the sensor comprises a relative humidity sensor. .Iaddend.

.Iadd.45. The system of claim 42, wherein the sensor system comprises a relative humidity sensor and a temperature sensor. .Iaddend.

.Iadd.46. The system of claim 42, wherein the control system is disposed to alter the temperature of water in the water circulation system based on the sensor system. .Iaddend.

.Iadd.47. The system of claim 42, wherein the control system is disposed to alter the flow rate of water within the water circulation system based on the sensor system. .Iaddend.

.Iadd.48. The system of claim 47, further comprising a variable speed pump. .Iaddend.

.Iadd.49. The system of claim 47, further comprising at least two variable speed pumps in parallel. .Iaddend.

.Iadd.50. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; and c. a water circulation system having water disposed therein, the water circulation system comprising a first chiller having a first chiller inlet and outlet, a second chiller having a secondchiller inlet and outlet, a third chiller having a third chiller inlet and outlet, wherein the outlet of the first chiller is in fluid communication the inlet of the second chiller and the outlet of the second chiller is in fluid communication with theinlet of the third chiller such that the first, second and third chillers are arranged in series, the outlet of the third chiller is in fluid communication with the water inlet of the air cooler, and the inlet of the first chiller is in fluidcommunication with the water outlet of the air cooler. .Iaddend.

.Iadd.51. The system of claim 50, the water circulation system further comprising water disposed therein, wherein the water has a first temperature at the inlet of the first chiller and a second temperature, cooler than the first temperature,at the inlet to the second chiller and the water has a third temperature at the second chiller outlet that is cooler than the second temperature and the water has a fourth temperature at the third chiller outlet that is cooler than the third temperature. .Iaddend.

.Iadd.52. The system of claim 50, further comprising a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir, the cool water port is in fluid communication with the second portion of reservoir, the warm water port is in fluid communication with the thirdchiller inlet and the cool water port is in fluid communication with the third chiler outlet. .Iaddend.

.Iadd.53. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir and the cool water port is in fluid communication with the second portion of reservoir; d. a water circulation system, the water circulation systemcomprising a first chiller, the first chiller having a first chiller inlet and outlet, wherein the outlet of the first chiller is in fluid communication with the cool water port, and the inlet of the first chiller is in fluid communication with the warmwater port of the thermal energy storage tank; e. a sensor system having at least one sensor adjacent the air outlet of the air cooler; and f. a control system disposed to alter a characteristic of the water in the water circulation system based on thesensor system and a first predetermined set point, g. a pump system having a pump inlet, wherein the pump inlet is in fluid communication with the second portion of the reservoir and the liquid water outlet of the air cooler is in fluid communicationwith the first portion of the reservoir. .Iaddend.

.Iadd.54. The system of claim 53, wherein the sensor comprises a temperature sensor. .Iaddend.

.Iadd.55. The system of claim 53, wherein the sensor comprises a relative humidity sensor. .Iaddend.

.Iadd.56. The system of claim 53, wherein the sensor system comprises a relative humidity sensor and a temperature sensor. .Iaddend.

.Iadd.57. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; d. a water circulation system comprising water disposed therein, a first chiller having a first chiller inlet and outlet and a second chiller having a second chiller inlet and outlet, wherein theoutlet of the first chiller is in fluid communication with the inlet of the second chiller such that the first and second chillers are arranged in series, the outlet of the second chiller is in fluid communication with the air cooler, wherein the waterhas a first temperature at the inlet of the first chiller and a second temperature, cooler than the first temperature, at the inlet to the second chiller and the water has a third temperature at the second chiller outlet that is cooler than the secondtemperature; and e. an additive disposed in the water within the water circulation system, wherein the additive is capable of reducing the freezing point of water. .Iaddend.

.Iadd.58. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a chilled water circulation system comprising a first water chiller and a second water chiller, each of the chillers having an evaporator with an inlet and outlet, wherein the outlet of thefirst water chiller evaporator is in fluid communication with the water inlet of the second water chiller evaporator, the outlet of the second water chiller evaporator is in fluid communication with the liquid water inlet of the air cooler, and the inletof the first water chiller evaporator is in fluid communication with the water outlet of the air cooler; and d. a condenser water circuit, wherein each of the first and second water chillers has a condenser water inlet and outlet, wherein the condenserwater inlet of the first water chiller is in fluid communication with the condenser water outlet of the second water chiller, whereby water flow through the condenser water circuit is in a direction opposite of chilled water flow through the chilledwater circulation system. .Iaddend.

.Iadd.59. The system of claim 58, wherein the condenser water inlet and outlet of the first water chiller are comprised of a first condenser and the condenser water inlet and outlet of the second water chiller are comprised of a secondcondenser. .Iaddend.

.Iadd.60. The system of claim 58, wherein the first and second water chillers comprise a duplex chiller. .Iaddend.

.Iadd.61. The system of claim 59, wherein the first and second water chillers comprise a duplex chiller. .Iaddend.

.Iadd.62. The system of claim 59, further comprising a cooling tower having a water inlet and water outlet, wherein the water inlet of the cooling tower is in fluid communication with a water outlet of the condenser of the first chiller and thewater outlet of the cooling tower is in fluid communication with a water inlet of the condenser of the second chiller. .Iaddend.

.Iadd.63. The system of claim 58, further comprising a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir and the cool water port is in fluid communication with the second portion of reservoir, wherein the outlet of the second chiller is in fluidcommunication with the cool water port, and the inlet of the first chiller is in fluid communication with the warm water port of the thermal energy storage tank. .Iaddend.

.Iadd.64. The system of claim 63, wherein the cool water port is disposed between the outlet of the evaporator of the second chiller and the liquid water inlet of the air cooler and the warm water port is disposed between the inlet of the firstchiller evaporator and the water outlet of the air cooler. .Iaddend.

.Iadd.65. A method for chilling inlet air to a gas turbine, comprising: providing a chilled water circuit having a first water chiller and a second water chiller, the first and second water chillers being arranged in series for circulatingchilled water in a first flow direction through the chilled water circuit; providing a circulating condenser water circuit that circulates cooling water through the second water chiller and then through the first water chiller such that the condenserwater circuit is counterflow to the chilled water circuit; providing an inlet air chiller for lowering the temperature of air being fed to a gas turbine compressor through heat transfer between the circulating water and the air; passing chilled waterthrough the first water chiller, wherein the chilled water passing through the first water chiller is lowered from a first temperature to a second temperature that is lower than the first temperature; passing the chilled water from the first waterchiller through the second water chiller, wherein the chilled water temperature is lowered to a third temperature that is lower than the second temperature, thus providing a staged temperature drop of the chilled water; and passing at least a portion ofthe chilled water from the chilled water circuit through the inlet air chiller resulting in heat transfer between the chilled water and the air, such that the temperature of the air is lowered. .Iaddend.

.Iadd.66. The system of claim 24, wherein the variable flow pump system comprises a flow control valve. .Iaddend.

.Iadd.67. The system of claim 39, wherein the variable flow pump system comprises a flow control valve. .Iaddend.

.Iadd.68. The system of claim 59, wherein the first and second water chillers comprise a duplex chiller, whereby the first condenser is joined directly to the second condenser such that both the first and second condensers share the samecondenser tubes. .Iaddend.

.Iadd.69. The system of claim 58, wherein the first and second water chillers comprise a duplex chiller whereby the first evaporator is joined directly to the second evaporator such that both the first and second evaporators share the sameevaporator tubes. .Iaddend.

.Iadd.70. The method of claim 65 wherein the wherein the first and second chillers together comprise a single duplex chiller. .Iaddend.

.Iadd.71. A system for chilling inlet air to a gas turbine plant, comprising a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a thermal energy storage tank having a warm water port and a cool water port, and d. a first water circulation system comprising a duplex chiller with a duplex chiller outlet in fluidcommunication with the cool water port of the thermal energy storage tank, and a duplex chiller inlet in fluid communication with the warm water port of the thermal energy storage tank; e. wherein the liquid water inlet of the air cooler is in fluidcommunication with the cool water port of the thermal energy storage tank and the liquid water outlet of the air cooler is in fluid communication with the warm water port of the thermal energy storage tank. .Iaddend.

.Iadd.72. The system of claim 71 wherein the duplex chiller comprises a centrifugal water chiller. .Iaddend.

.Iadd.73. The system of claim 72 wherein the centrifugal water chiller is a Trane duplex centrifugal CDHF water chiller. .Iaddend.

.Iadd.74. The system of claim 71, wherein the duplex chiller has a first condenser that is joined directly to a second condenser such that both the first and second condensers share the same condenser tubes. .Iaddend.

.Iadd.75. The system of claim 71, wherein the duplex chiller has a first evaporator that is joined directly to a second evaporator such that both the first and second evaporators share the same evaporator tubes. .Iaddend.

.Iadd.76. A system for chilling inlet air to a gas turbine plant, comprising: a. a gas turbine that includes a gas turbine air inlet; b. an air cooler disposed adjacent the gas turbine air inlet, the air cooler having an air inlet, an airoutlet, a liquid water inlet and a liquid water outlet; c. a thermal energy storage tank having a warm water port and a cool water port and a water reservoir defined within the tank, the reservoir having an upper first portion and a lower secondportion, wherein the warm water port is in fluid communication with the first portion of the reservoir and the cool water port is in fluid communication with the second portion of reservoir; and d. a first water circulation system comprising a firstchiller having a first chiller inlet and outlet and a second chiller having a second chiller inlet and outlet, wherein the outlet of the first chiller is in fluid communication the inlet of the second chiller such that the first and second chillers arearranged in series, the outlet of the second chiller is in fluid communication with the cool water port, and the inlet of the first chiller is in fluid communication with the warm water port of the thermal energy storage tank, e. wherein the liquid waterinlet of the air cooler is in fluid communication with the cool water port and the liquid water outlet of the air cooler is in fluid communication with the warm water port. .Iaddend.

.Iadd.77. The system of claim 76 whereby the first and second chillers are comprised of a single duplex chiller having two compressors and two refrigerant circuits. .Iaddend.

.Iadd.78. The system of claim 77 whereby the duplex chiller comprises two evaporators arranged in series with circulating evaporator water at a first stage having a first temperature, circulating evaporator water at a second stage having asecond temperature lower than the circulating evaporator water first temperature and circulating evaporator water at a third stage having a third temperature lower than the circulating evaporator water second temperature. .Iaddend.

.Iadd.79. The system of claim 77 whereby the duplex chiller comprises two condensers arranged in series with circulating condenser water having a first temperature at a first stage, circulating condenser water at a second stage having a secondtemperature higher than the circulating condenser water first temperature and circulating condenser water at a third stage having a third temperature higher than the circulating condenser water second temperature. .Iaddend.

.Iadd.80. The system of claim 77 whereby the duplex chiller comprises a counterflow, wherein evaporator water flow is in a direction opposite to condenser water flow. .Iaddend.

.Iadd.81. The system of claim 77 wherein the duplex chiller comprises a centrifugal water chiller. .Iaddend.

.Iadd.82. The system of claim 81 wherein the centrifugal water chiller is a Trane duplex centrifugal CDHF water chiller. .Iaddend.
Description:
 
 
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