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Study on Short Circuit of Airflow in Outdoor Unit of Air Conditioner.

Number: No 148

Author(s) : MIYAZAKI H., ITO T., NAKAYAMA H., HIROTA M.

Summary

In air conditioners installed in commercial buildings, their efficiencies are often deteriorated by short circuits of airflows in which hotter (cooling operation) or cooler (heating operation) air blown out from the outdoor units is sucked again in the outdoor units. From viewpoints of energy savings of air conditioners, it is necessary to understand the influence of short circuits of airflows on operations of air conditioners quantitatively and to take measures against them. The purpose of this study is to make clear the influence of installation conditions of the outdoor unit of an air conditioner on the short circuit of airflow issued from it. We made laboratory measurements and field measurements of airflow temperatures around the outdoor unit of a packaged air conditioner. The short circuit of the airflow from the front face to the side face of the outdoor unit was enhanced when there was a wall near the side face. In such cases, linear relationships were found between suction air temperatures of the outdoor unit and outdoor air temperatures. 

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  • Original title: Study on Short Circuit of Airflow in Outdoor Unit of Air Conditioner.
  • Record ID : 30030011
  • 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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