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An exhaust-air heat recovery heat pump system optimised for use in cold climates.

Author(s) : MINEA V.

Type of article: Article, Case study

Summary

A highly energy-efficient heat pump system that can be used for heating and cooling general service buildings such as hospitals, recovers most of the energy otherwise lost through ventilation and is optimized for use in cold climates. The system has two stages for pre-heating the incoming air for ventilation: a supplementary glycol-to-air heat exchanger and a reversible air-to-air heat pump circuit for recovering energy from the exhaust air flow. The heat pump system has two independent circuits, each of which can be used for heating or cooling, as well as a supplementary condenser for extreme weather conditions. It uses a flexible demand-driven control strategy that regulates system capacity and also avoids cycle inversion when defrosting is required. The prototype system was followed for 12 months, and simple payback time was estimated to be four years.

Details

  • Original title: An exhaust-air heat recovery heat pump system optimised for use in cold climates.
  • Record ID : 2004-1400
  • Languages: English
  • Source: IEA HPC Newsl. - vol. 21 - n. 3
  • Publication date: 2003

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