Parametric Analysis of Combined Cycles Equipped With Inlet Fogging
Author:
Bhargava R.1, Bianchi M.2, Melino F.2, Peretto A.2
Affiliation:
1. Universal Ensco, Inc., 1811 Bering Drive, Houston, TX 77057 2. DIEM–University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Abstract
In recent years, deregulation in the power generation market worldwide combined with significant variation in fuel prices and a need for flexibility in terms of power augmentation specially during periods of high electricity demand (summer months or noon to 6:00 p.m.) has forced electric utilities, cogenerators and independent power producers to explore new power generation enhancement technologies. In the last five to ten years, inlet fogging approach has shown more promising results to recover lost power output due to increased ambient temperature compared to the other available power enhancement techniques. This paper presents the first systematic study on the effects of both inlet evaporative and overspray fogging on a wide range of combined cycle power plants utilizing gas turbines available from the major gas turbine manufacturers worldwide. A brief discussion on the thermodynamic considerations of inlet and overspray fogging including the effect of droplet dimension is also presented. Based on the analyzed systems, the results show that high pressure inlet fogging influences performance of a combined cycle power plant using an aero-derivative gas turbine differently than with an advanced technology or a traditional gas turbine. Possible reasons for the observed differences are discussed.
Publisher
ASME International
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference9 articles.
1. Chaker, M., Meher-Homji, C. B., and Mee, III, T., 2002, “Inlet Fogging Of Gas Turbine Engines—Part A: Fog Droplet Thermodynamics, Heat Transfer And Practical Considerations,” ASME Paper No. GT-2002-30562. 2. Jolly, S., Nitzken, J., and Shepherd, D., 1998, “Evaluation Of Combustion Turbine Inlet Air System,” Presented at the Power-Gen Asia, New Delhi, India, Sept. 29–Oct. 1. 3. Tawney, R., Pearson, C., and Brown, M., 2001, “Options to Maximize Power Output for Merchant Plants in Combined Cycle Applications,” ASME Paper No. 2001-GT-0409. 4. Jones, C., and Jacobs, III, J. A., 2000, “Economic and Technical Considerations for Combined Cycle Performance Enhancement Options,” GE Power Systems, GER-4200. 5. Bhargava, R., and Meher-Homij, C. B., 2002, “Parametric Analysis of Existing Gas Turbines With Inlet Evaporative and Overspray Fogging,” ASME Paper No. GT-2002-30560.
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