Share

IIR document

Performance evaluation of a CO2 heat pump system for fuel cell vehicles considering the heat exchanger arrangements.

Author(s) : KIM S. C., KIM M. S., HWANG I. C., et al.

Type of article: Article, IJR article

Summary

A novel CO2 heat pump system was provided for use in fuel cell vehicles, when considering the heat exchanger arrangements. This cycle which had an inverter-controlled, electricity-driven compressor was applied to the automotive heat pump system for both cooling and heating. The cooling and heating loops consisted of a semi-hermetic compressor, supercritical pressure microchannel heat exchangers (a gas cooler and a cabin heater), a microchannel evaporator, an internal heat exchanger, an expansion valve and an accumulator. The performance characteristics of the CO2 heat pump system for fuel cell vehicles were analyzed by experiments. Results for steady and transient state performance were provided for various operating conditions. Furthermore, experiments to examine the arrangements of a radiator and an outdoor heat exchanger were carried out by changing their positions for both cooling and heating conditions. The arrangements of the radiator and the outdoor heat exchanger were tested to quantify cooling/heating effectiveness and mutual interference. The improvement of heating capacity and COP of the CO2 heat pump system was up to 54 and 22%, respectively, when using preheated air through the radiator instead of cold ambient air. However, the cooling capacity quite decreased by 40-60% and the COP fairly decreased by 43-65%, for the new radiator-front arrangement.

Available documents

Format PDF

Pages: 1195-1206

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Performance evaluation of a CO2 heat pump system for fuel cell vehicles considering the heat exchanger arrangements.
  • Record ID : 2007-2799
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 7
  • Publication date: 2007/11

Links


See other articles in this issue (14)
See the source

Indexing