바닥복사냉·난방시스템의 유형별 에너지성능 평가 = An Evaluation of Energy Performance of Radiant Floor Cooling and Heating Systems

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the indoor environmental conditions for comfort and energy performance of radiant floor cooling·heating system integrated with controlled ventilation compared to a conventional solution with packaged air-conditioning·boiler. The alternatives of 5 system types were investigated through TRNSYS simulation for 2 heating alternatives: 1) ALT-1(radiant heating with boiler) and 2) ALT-2(radiant heating with solar collector), and 3 cooling alternatives: 3) ALT-3(packaged air-conditioning), 4) ALT-4(radiant cooling with chiller), 5) ALT-5(radiant cooling with geothermal energy). Based on simulation results, it was confirmed that all alternative systems could provide heating and cooling for occupants comfort. In terms of energy performance, ALT-2 was superior than ALT-1, and ALT-4, ALT-5 demonstrated better performance than ALT-3. From the combined heating and cooling cost point of view, the radiant floor cooling and heating system(boiler+chiller) could reduce the energy cost by 58.8％ of the cost by boiler and PAC and it could further reduce by 86.8％ when the solar and geothermal energy was used as heat sources.

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