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히트펌프 구동 기반 액체식 제습시스템과 기존 액체식 제습시스템의 에너지 소비 분석
신장훈(Shin, Jang-Hoon),박준영(Park, Joon-Young),조민석(Jo, Min-Suk),정재원(Jeong, Jae-Weon) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.9
Heat pump driven liquid desiccant (HPLD) system, which takes advantage of cooling capacity and heating capacity from evaporator and condenser respectively, have been developed rapidly in recent years. The purpose of this paper is to evaluate energy saving potential of a HPLD system compared to a conventional liquid desiccant (LD) system. R-134a was used for the refrigerant in the heat pump and aqueous solution of lithium chloride was used in the LD system. A simulation based on an empirical model of an absorber was conducted, and total energy consumption in the proposed HPLD system were compared and analyzed with that of the conventional LD system. As a result, the proposed system showed better performance than the conventional liquid desiccant system in the aspect of energy saving. Moreover, HPLD is expected to have a great advantage in terms of compactness from the replacement of the cooling and heating devices in the conventional LD system with a heat pump.
직교류형 재생기의 수용액 온도에 따른 재생량 변화 분석
동혜원(Hye-Won Dong),최은지(Eun-Ji Choi),조민석(Min-Suk Jo),신장훈(Jang-Hoon Shin),정재원(Jae-Weon Jeong) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
The purpose of this study is to evaluate experimentally the impact of inlet solution temperature on the performance of an adiabatic cross flow regenerator. A lithium chloride aqueous solution was selected as the desiccant solution. The measured parameters were the temperature, mass flow rate, and concentration of the inlet solution and the temperature, mass flow rate, and humidity ratio of the air inlet and outlet. The inlet solution temperature varied from 50 to 90°C, and the inlet air temperature was set to approximately 30°C, which represents summer mode. The regeneration rate was used to analyze the mass transfer performance of the regenerator. The test results represented that the performance of the regenerator steadily improved as the solution temperature increased.
수중건물에 적용된 액체식 제습증발냉각기반 전외기 공조시스템의 연간 에너지 소비 및 성능 분석
조민석(Jo, Min-Suk),박준영(Park, Joon-Young),신장훈(Shin, Jang-Hoon),최병남(Choi, Byoung-Nam),정재원(Jeong, Jae-Weon) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.6
The purpose of this paper is to analyze the operating energy consumption and performance of a liquid desiccant and evaporative cooling-assisted 100% outdoor air system (LD-IDECOAS) applied in an underwater building. Due to distinct features in surrounding environments of the underwater building from an above ground building, the thermal loads of the underwater building showed difference which affected the energy consumptions of the buildings accordingly. To estimate the energy consumption of the LD-IDECOAS, the office buildings located above the ground and underwater were assumed to be 625㎡ in size and have accommodations for 32 people. The thermal loads of the designed buildings were calculated using TRNSYS 17. According to the required thermal load of the modeling space, the energy simulation was conducted to evaluate the annual operating energy of the LD-IDECOAS using a commercial engineering equation solver (EES). As a result, the LD-IDECOAS in the underwater building showed 48% reduction in the energy consumption compared to that in the above ground building. Furthermore, the system performance was increased and the system capacity was reduced.