RESEARCH PAPERS: Gas Turbines: Heat Transfer

A Numerical Investigation of the Cooling Effect of Compressed Natural Gas Throttling on Engine Delivery Ratio

[+] Author and Article Information
Y. Yacoub, L. Marbun, R. Bata

Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26506

J. Eng. Gas Turbines Power 121(1), 121-128 (Jan 01, 1999) (8 pages) doi:10.1115/1.2816298 History: Received April 01, 1998; Revised July 29, 1998; Online November 19, 2007


A theoretical study was conducted to investigate the cooling effect of throttling compressed natural gas during the pressure regulation process. The concept of using this effect in cooling down the induction air was investigated. A thermodynamic model was developed for a typical fuel delivery system used on a vehicle fueled with compressed natural gas. The model was based on a set of integral conservation laws applied to each component of the fueling system. Several heat exchanging arrangements between the throttled gas and the inlet air were examined. The effect of the added heat exchanger on engine delivery ratio was examined for different engine sizes as well as for different operating conditions. An increase of 1 to 2.5% in engine delivery ratio was predicted due to the added heat exchanger.

Copyright © 1999 by The American Society of Mechanical Engineers
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