NDLI: Gas Turbine Power Augmentation: Parametric Study Relating to Fog Droplet Size and Its Influence on Evaporative Efficiency

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chaker, Mustapha Cyrus, B. Meher-Homji
Copyright Year	2008
Abstract	Several gas turbine power augmentation techniques are available to counter the detrimental drop in power and thermal efficiency that occur at high ambient temperatures. Inlet fogging and wet compression are two common and relatively simple techniques. This paper addresses the influence and importance of droplet size on evaporative cooling performance and efficiency. Common spray nozzles used for inlet fogging and wet compression are the impaction pin, swirl jet, air assisted, and swirl flash nozzles. The atomization process from these nozzles and their performance depends on the droplet size, size distribution, and spray plume shape. Droplets size varies with nozzle types, configurations, operating conditions, and nozzle manifold location in the gas turbine inlet duct as they are affected by airflow velocity, residence time coalescence effects, evaporation efficiency, and water carryover. The proper selection of nozzle type and location and nozzle distribution are of importance to avoid large droplets and under/over saturated areas which would affect compressor mechanical and aerodynamic efficiency. Analytical and numerical studies are compared to experimental results available from installed systems, and treated in the literature. This paper provides a comprehensive treatment of parameters affecting droplet size and will be of value to gas turbine fog system designers and users.
Sponsorship	International Gas Turbine Institute
Starting Page	357
Ending Page	369
Page Count	13
File Format	PDF
ISBN	9780791843178
DOI	10.1115/GT2008-51476
e-ISBN	0791838242
Volume Number	Volume 7: Education; Industrial and Cogeneration; Marine; Oil and Gas Applications
Conference Proceedings	ASME Turbo Expo 2008: Power for Land, Sea, and Air
Language	English
Publisher Date	2008-06-09
Publisher Place	Berlin, Germany
Access Restriction	Subscribed
Subject Keyword	Water Compression Temperature Plumes (fluid dynamics) Ducts Sprays Evaporative cooling Compressors Evaporation Manifolds Air flow Gas turbines Drops Nozzles Shapes Thermal efficiency
Content Type	Text
Resource Type	Article

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