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CO2 heat pump/chiller system for a hotel in a tropical climate: a numerical investigation.

Number: 0261

Author(s) : ELARGA H., HAFNER A.

Summary

The work investigates the performance of a CO2 heat-pump/chiller unit integrated with a thermal storage system to mainly provide for the domestic hot water demands of a hotel building. The thermal storage system consists of a tank holds at fully charged conditions 5m3 of hot water leaving the gas cooler at 70°C and 145 kWh of energy capacity. The heat pump’s evaporator is connected to the hotel chilled water system (12 °C to 6.5 °C) and provides a cooling capacity of 37 kW. A dynamic numerical model for the system was developed and simulation results have shown that a heat pump with a nominal heating capacity of 50 kW and a daily operation of almost 14 hours would have a COP of 6.7 and a complete system ‘s COP of 5.7 if the circulating pumps are considered. This presents an energy efficient solution if compared to a convenient boiler heating system and a separate chiller with a COP up to 3.

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Pages: 8 p.

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Details

  • Original title: CO2 heat pump/chiller system for a hotel in a tropical climate: a numerical investigation.
  • Record ID : 30029818
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI: http://dx.doi.org/10.18462/iir.gl2022.0261
  • Document available for consultation in the library of the IIR headquarters only.

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