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U-type Cross-Counter Indirect Evaporative Cooler made of Plastic/Paper

U형 직교 대향류 플라스틱/종이 재질 간접증발소자

  • Kim, Nea-Hyun (Department of Mechanical Engineering, Incheon National University)
  • Received : 2016.08.08
  • Accepted : 2016.11.10
  • Published : 2016.11.30

Abstract

In Korea, the summer is hot and humid, and much electricity is consumed for air conditioning. Thus, the simultaneous usage of an indirect evaporative cooler and a common air conditioner could reduce the sensible heat and save electricity. This study developed a U-type cross-counter flow indirect evaporative cooler (IEC) made of plastic and paper. The efficiencies were compared with those of a cross-flow IEC. The specimen was $500mm{\times}500mm{\times}1000mm$. the results show that the indirect evaporation efficiencies of the cross-counter flow sample were 6-21% higher than those of the cross-flow sample. The pressure drops of the cross-counter sample were 51-66% higher. Thermal analysis based on the -NTU method predicted the experimental data within 10%. The electrical energy saved by the use of the cross-counter flow IEC was larger than that of the counter flow IEC, and the difference increases with the velocity. However, the the cross-counter IEC is two times larger than the cross-flow IEC, which may increase the material cost and water usage.

Keywords

Indirect evaporative cooler;Cross-counter;Performance;Paper;Plastic

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