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Comparison of correlations for modelling heat exchanger performance in a compact ammonia refrigeration unit.

Number: 1128

Author(s) : SALGADO FUENTES V., BOCCIA R., MARKUSSEN W. B., ROTHUIZEN E. D., KRISTOFERSSON J., MADSEN C., ELMEGAARD B.

Summary

This paper compare the correlations for heat transfer coefficient that can be used for modelling performance of plate heat exchangers when used in compact ammonia chillers. A 27 kW ammonia chiller was used to collect data of four different operating conditions. After that, the most representative data from the system were used to validate a numerical model of the chiller. The model simulated the performance using several correlations of heat transfer coefficient. The results showed that a suitable combination of heat transfer coefficient correlations for refrigerant and water to calculate the heat flow rate through the evaporator could yield a deviation between -16 % and -12 % when compared against experimental data. In the case of the condenser, the correlations presented a deviation between -9.9 % and -6.1 % in heat flow rate.

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Comparison of correlations for modelling heat exchanger performance in a compact ammonia refrigeration unit

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  • Original title: Comparison of correlations for modelling heat exchanger performance in a compact ammonia refrigeration unit.
  • Record ID : 30027958
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI: http://dx.doi.org/10.18462/iir.gl.2020.1128

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