Performance of HC and HFC Refrigerants in a Finned-Tube Evaporator and Its Effect on System Efficiency

Published

September 1, 2004

Author(s)

Piotr A. Domanski, David A. Yashar, M Kim

Abstract

The paper presents a comparable evaluation of isobutane (R600a), propane (R290), R134a, R22, R410A, and R32 in an optimized finned-tube evaporator, and analyzes the impact of evaporator effects on the system coefficient of performance. The study relied on a detailed evaporator model derived from NIST's EVAP-COND simulation package and used the ISHED1 scheme employing a non-Darwinian Learnable Evolution Model for circuitry optimization. In the process, 4500 circuitry designs were generated and evaluated for each refrigerant. The obtained evaporator optimization results were incorporated in a conventional analysis of the vapor compression cycle. For a theoretical cycle analysis without accounting for evaporator effects, the COP spread for the studied refrigerants was as high as 11.7 %. For cycle simulations including evaporator effects, the COP of R290 was better than that of R22 by up to 3.5 %, while the remaining refrigerants performed within approximately a 2 % COP band of the R22 baseline for the two condensing temperatures considered.

Citation

To Be Determined

Pub Type

Journals

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Keywords

air conditioning, coefficient of performance, evaporator, HFC refrigerants, natural refrigerants, optimization, vapor compression cycle

Citation

Domanski, P. , Yashar, D. and Kim, M. (2004), Performance of HC and HFC Refrigerants in a Finned-Tube Evaporator and Its Effect on System Efficiency, To Be Determined, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860952 (Accessed April 25, 2024)