Analysis of the variable heat exchange efficiency of heat recovery ventilators and the associated heating energy demand

Youn hee Choi, Doosam Song, Donghyun Seo, Joowook Kim

研究成果: ジャーナルへの寄稿学術誌査読

39 被引用数 (Scopus)

抄録

Energy recovery ventilators (ERV) have become popular in Korea for their use in minimizing heat loss in ventilation and maintaining indoor air quality (IAQ). The performance of ERV systems is determined by laboratory tests under prescriptive indoor and outdoor conditions. Typically, a fixed heat recovery efficiency of the ventilation system is used in building energy simulations. In this study, in order to analyze the heat recovery efficiency of an ERV under actual operating conditions, long-term field measurements were performed in a residential building in the winter. The results showed that the enthalpy heat recovery efficiencies fluctuated between 25% and 70% depending on the outdoor conditions. The sensible heat recovery efficiencies were between 30% and 65% and were proportional to the temperature difference between indoors and outdoors. The heat exchange efficiency of ERV was not constant but varied according to changes of indoor and outdoor conditions under actual operating conditions. A simulation method was used to analyze the effect of the ERV's variable heat exchange efficiency on heating energy demand in the heating season. Two cases were analyzed. Case 2 analyzed the variable heat exchange effectiveness of the ERV based on the field measurements. Case 1 examined the fixed effectiveness proposed by the manufacturer. Simulation results showed that the heating energy demand in Case 2 was 69% higher than that in Case 1. This means that the heating energy demand may be underestimated if the heat exchange efficiency of the ventilation system is assumed to be constant in the simulation.

本文言語英語
ページ(範囲)152-158
ページ数7
ジャーナルEnergy and Buildings
172
DOI
出版ステータス出版済み - 8月 1 2018
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 建築および建設
  • 機械工学
  • 電子工学および電気工学

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