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A residential heat pump system for cooling, heating, dehumidification and outdoor air supply.

Number: No 127

Author(s) : LIANG X. Y., ZHANG J., CAO X., SHAO L. L., ZHANG C. L., YANG C., CHEN X. N., SHU H. F.

Summary

With growing demands of indoor air quality and thermal comfort, dedicated outdoor air system with dehumidification function is becoming more popular for residential use. However, due to limited air volume of outdoor air, dedicated outdoor air system often needs to supply air at very low humidity ratio for dehumidification, which decreases the system energy efficiency. In this work, by combining dedicated outdoor air system and small air-cooled chiller, a heat pump system for cooling, heating, dehumidification and outdoor air supply is proposed. In the system, a high temperature water coil is applied to precool the outdoor air for decreasing the energy consumption of dehumidification. Besides, dehumidification capacity of outdoor air system with precooling is enough to handle overall latent load. In the meantime, without the demand of dehumidification, the water supplying temperature of chiller can rise to 15°C or above, which is not only beneficial to energy efficiency improvement, but also available for dry terminal. Modeling results of the system indicate that the annual power consumption of the new system can be reduced by 16.9% relative to the combined operation of a dedicated outdoor air system and an individual small chiller.

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Pages: 12 p.

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Details

  • Original title: A residential heat pump system for cooling, heating, dehumidification and outdoor air supply.
  • Record ID : 30029997
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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