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Technical Briefs

Development of an Improved Desiccant-Based Evaporative Cooling System for Gas Turbines

[+] Author and Article Information
Amir Abbas Zadpoor1

Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, Delft 2629HS, The Netherlandsa.a.zadpoor@tudelft.nl

Ali Asadi Nikooyan

Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, Delft 2628CD, The Netherlands

1

Corresponding author.

J. Eng. Gas Turbines Power 131(3), 034506 (Feb 19, 2009) (5 pages) doi:10.1115/1.3030875 History: Received June 20, 2008; Revised July 22, 2008; Published February 19, 2009

The evaporative inlet cooling systems do not work well in humid areas. However, desiccant wheels can be used to dehumidify the air before passing it through the evaporative cooler. A previous study of combined direct and indirect evaporative coolers showed that a single desiccant wheel does not offer much higher effectiveness compared with the multistage evaporative systems. In this paper, additional dehumidification and indirect evaporative cooling stages are added to increase the effectiveness of the desiccant-based inlet cooling. A typical gas turbine cycle along with an industrial gas turbine with actual performance curves are used to study the performance of the proposed system in three different climatic conditions. It is shown that the added stages substantially improve the effectiveness of the desiccant-based inlet cooling.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of the proposed desiccant-based inlet cooling system

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Figure 2

Pressure drop of the process air for different wheels (per wheel) for T1 (a) and T2 (b)

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Figure 3

The performance of the turbines versus the type of the inlet cooling system for Qom (a), Chabahar (b), and Siri (c)

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Figure 4

Analysis of the power consumption and power output increase for different cooling systems: Qom (a), Chabahar (b), and Siri (c)

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