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전열교환 환기장치의 효율 차이에 따른 결로 발생 빈도 및 결로 방지용 예열코일용량 분석
고진영(Jinyoung Ko),정재원(Jae-Weon Jeong) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.3
The purpose of this study was to compare the number of condensation occurrences and the required pre-heat coil capacity according to type of energy recovery ventilator (ERV) and the difference of latent effectiveness in the ERVs. Because of revised ventilation regulations, buildings in Korea have been required to install mechanical ventilation systems. As the rotary type ERV (enthalpy wheel) has better latent effectiveness than that of the plate type ERV, the latent effectiveness difference between two types shows different condensation occurrences that would result in performance degradation. The enthalpy wheel with 80% of sensible and latent effectiveness indicated 99% less condensation occurrences and was required to install 89% smaller capacity of the pre-heat coil than that of the ERV with 80% of sensible and 30% of latent effectiveness during winter. Additionally, ERVs with low latent effectiveness cause more condensation under low room temperature in summer. Thus, installation of the enthalpy wheel rather than the plate type ERV would prevent the occurrences of condensation and reduce the need of a pre-heat coil with huge capacity.
액체식 제습 적용 외기전담시스템의 에너지 절감 효과 분석
고진영(Jinyoung Ko),천성용(Seong-Yong Cheon),이재희(Jae-Hee Lee),정재원(Jae-Weon Jeong) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6
The main goal of this study is to evaluate the energy saving potential of a liquid desiccant-assisted dedicated outdoor air system applied in an apartment. Not to use an additional regenerator fan, a retrofit of a liquid desiccant-assisted dedicated outdoor air system with the exhaust air-side regenerator was proposed. In an apartment with the proposed system, the dedicated outdoor air system removes the total latent and ventilation load by a cooled liquid desiccant solution and the indoor air source heat-pump unit provides only the sensible cooling to the zone. As a reference system, an apartment with an ERV (Energy recovery ventilator) and air-source heat pump air conditioner was selected. The total energy consumption during the summer of an apartment house with the proposed system was compared with that of reference system which removes the whole sensible and latent load at the same time. The simulation was implemented by EES (Engineering equation solver). As a result, the apartment with the proposed system indicated 11.4% less total energy consumption than the reference case during the summer.