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Effect of evaporating temperature rising operation for multisplit type air-conditioner on energy conservation and thermal comfort.

Number: No 147

Author(s) : NAKAYAMA H., NAKA Y., MIURA M., TANAKA H.

Summary

In commercial buildings, the energy consumption by air conditioning amounts to 30% -40% of the entire building. Therefore, the energy saving of air-conditioning in those buildings is important to reduce their total energy consumption. In this background, the evaporating temperature rising operation of multi-split type air conditioner during cooling have been applied as one of the energy saving operations. In general, the increase of the evaporating temperature can improve the efficiency of the air conditioner, and the reduction of the energy consumption can be expected. On the other hand, since the cooling latent heat capacity decreases in this operation, the humidity of the air-conditioned room may increase and the thermal comfort may decrease. In this study, the energy saving effect and the thermal comfort of evaporating temperature rising operation in the air conditioning system for offices and a store were investigated by simulation. It was found that 7% – 17% cooling energy saving effect can be obtained by the rising the evaporating temperature in consideration of thermal comfort in the room, and larger energy saving effect can be obtained in the building having a high cooling sensible heat ratio. 

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  • Original title: Effect of evaporating temperature rising operation for multisplit type air-conditioner on energy conservation and thermal comfort.
  • Record ID : 30030010
  • 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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