Energy Management Research Journal (EMRJ)

Research Article

A Pathway for Sustainable Energy Development in Pakistan and Other Developing Countries

R. A. Wilsak¹ and R. A. Tatara²

¹Racine, WI 53402, USA.

²Department of Engineering Technology, Northern Illinois University, DeKalb, IL 60115, USA.

Submitted: March 24, 2020; Accepted: May 28, 2020.

Abstract

Centrifugal compressor calculations inherent to process simulators are based on ASME PTC 10, which in turn is derived from the work of J. M. Schultz in the 1960s. Although the analysis from Schultz began with the reversible path following a polytrope, this was negated once the polytropic exponent was allowed to vary. Moreover, the path was altered on an inconsistent basis through the use of a correction factor and piecewise integration of the reversible path with various polytropic exponents. The result is an erroneous procedure embodied in ASME PTC 10. Here, a new polytropic analysis with a precisely defined reversible path is presented. The final equations are thermodynamically rigorous subject to assumptions that the compressor is at steady-state, the gas flowing through the compressor is single phase and no chemical reactions take place.

Keywords

ASME PTC 10, Centrifugal Compressors, Polytropic Compression, Process Simulators.

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