R-744 gas cooler model development and validation

Jian Min Yin; Clark W. Bullard; Predrag S. Hrnjak

doi:10.1016/S0140-7007(00)00082-7

R-744 gas cooler model development and validation

Jian Min Yin, Clark W. Bullard, Predrag S. Hrnjak

Mechanical Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A first principles-based model was developed for a transcritical CO₂ gas cooler, using a finite element method. The model uses published correlations for refrigerant and airside heat transfer and pressure drop. Experimental results are presented at 48 operating conditions. The model predicted the gas cooler capacity within ±2% and pressure drop on the R-744 side well within the range of experimental error. The model's usefulness is demonstrated by analyzing alternative circuiting and multi-slab designs.

Original language	English (US)
Pages (from-to)	692-701
Number of pages	10
Journal	International Journal of Refrigeration
Volume	24
Issue number	7
DOIs	https://doi.org/10.1016/S0140-7007(00)00082-7
State	Published - Jul 2001

Keywords

Carbon dioxide
Design
Gas cooling
Heat exchanger
Modelling
Regrigerant
Transcritical cycle

ASJC Scopus subject areas

Building and Construction
Mechanical Engineering

Online availability

10.1016/S0140-7007(00)00082-7

Library availability

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keywords = "Carbon dioxide, Design, Gas cooling, Heat exchanger, Modelling, Regrigerant, Transcritical cycle",

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AU - Bullard, Clark W.

AU - Hrnjak, Predrag S.

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N2 - A first principles-based model was developed for a transcritical CO2 gas cooler, using a finite element method. The model uses published correlations for refrigerant and airside heat transfer and pressure drop. Experimental results are presented at 48 operating conditions. The model predicted the gas cooler capacity within ±2% and pressure drop on the R-744 side well within the range of experimental error. The model's usefulness is demonstrated by analyzing alternative circuiting and multi-slab designs.

AB - A first principles-based model was developed for a transcritical CO2 gas cooler, using a finite element method. The model uses published correlations for refrigerant and airside heat transfer and pressure drop. Experimental results are presented at 48 operating conditions. The model predicted the gas cooler capacity within ±2% and pressure drop on the R-744 side well within the range of experimental error. The model's usefulness is demonstrated by analyzing alternative circuiting and multi-slab designs.

KW - Carbon dioxide

KW - Design

KW - Gas cooling

KW - Heat exchanger

KW - Modelling

KW - Regrigerant

KW - Transcritical cycle

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ER -

R-744 gas cooler model development and validation

Abstract

Keywords

ASJC Scopus subject areas

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