Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on Performance Prediction and Energy Saving of Indirect Evaporative Cooling System

간접식 증발냉각장치의 성능예측과 에너지절약에 관한 연구

  • Yoo, Seong Yeon (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.) ;
  • Kim, Tae Ho (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.) ;
  • Kim, Myung Ho (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
  • 유성연 (충남대학교 기계설계공학과) ;
  • 김태호 (충남대학교 기계설계공학과) ;
  • 김명호 (충남대학교 기계설계공학과)
  • Received : 2015.04.28
  • Accepted : 2015.06.30
  • Published : 2015.09.01
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Abstract

The purpose of this study is to predict the performance of an indirect evaporative cooling system, and to evaluate its energy saving effect when applied to the exhaust heat recovery system of an air-handling unit. We derive the performance correlation of the indirect evaporative cooling system using a plastic heat exchanger based on experimental data obtained in various conditions. We predict the variations in the performance of the system for various return and outdoor air conditioning systems using the obtained correlation. We also analyze the energy saving of the system realized by the exhaust heat recovery using the typical meteorological data for several cities in Korea. The average utilization rate of the sensible cooling system for the exhaust heat recovery is 44.3% during summer, while that of the evaporative cooling system is 96.7%. The energy saving of the evaporative cooling system is much higher compared to the sensible cooling system, and was about 3.89 times the value obtained in Seoul.

본 연구의 목적은 간접식 증발냉각 장치의 성능을 예측하고, 장치를 공기조화기의 배기열 회수에 적용하였을 경우의 에너지 절약효과를 분석하는 것이다. 플라스틱 열교환기를 사용한 간접식 증발냉각장치의 성능 상관식을 여러가지 조건에서 얻어진 실험 데이터로부터 구하였으며, 이 상관식을 이용하여 환기와 외기의 조건을 변화시켜가면서 장치의 성능변화를 예측하였다. 또한 간접식 증발냉각장치의 배기열 회수에 의한 에너지 절약효과를 우리나라 몇개 도시의 표준기상데이터를 사용하여 분석하였다. 여름철 배기열 회수를 위한 현열냉각장치의 사용율은 평균 44.3%이며 증발냉각장치의 사용율은 96.7% 이다. 증발냉각장치의 배기열 회수에 의한 에너지 절약은 현열냉각장치에 비해서 훨씬 높으며, 서울의 경우 약 3.89 배로 나타났다.

Keywords

References

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