Design Guide: Combustion Turbine Inlet Air Cooling Systems
Providing users with an understanding of the benefits and limitations, this guide assists in the successful design and implementation of a combustion turbine inlet air cooling system.
TABLE OF CONTENTS Design Guide: Combustion Turbine Inlet Air Cooling Systems
Chapter 4: Inlet Air Cooling Installations and Operational Experiences
Overview
There are many operating CTIAC systems, and few, if any, are operating below design conditions. These operating systems include most of the many different types of cooling systems, including evaporative cooling, chilled water (SFC) with ice thermal storage, and direct refrigerant cooling.
The design features and some of the operational experiences of four CTIAC installations are discussed below as case studies. The installations show combinations of some of the typical variations in turbine and cooling equipment, including industrial and aeroderivative turbines, evaporative cooling and direct vapor compression chilling, thermal storage, and sites for electric utilities and independent power producers.
The case studies listed below are not intended to coverall the possible combinations of combustion turbines and inlet air cooling. Many small combustion turbines in industrial applications may economically benefit from inlet air cooling.
4.1 Case Study #1: Utility Peaking Combustion Turbine Inlet Air Cooling System using Chilled Water (SFC) and Ice Thermal Storage, Lincoln, Nebraska
The CTIAC System
The Rokeby generation station of the electric utility (LFS) in Lincoln, Nebraska, was the first site using ice thermal energy storage with a chilled water combustion turbine inlet air cooling system. The Mid Continent Area Power Pool (MAPP) required LES to have a 15% reserve generating capacity for four hours for five consecutive days. Since the peak demand occurred in July and August, hot weather decreased the capacity of the peaking combustion turbines.
The MAPP design condition is 101.5 F (38.6 C) and 34.2% relative humidity (75 F [23.9 C] wet bulb). At these...
Copyright American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1999 under license agreement with Books24x7
