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일반공조 시스템 대비 축열조와 연동된 수직밀폐형 지열히트펌프의 냉난방 에너지 성능 및 경제성 분석
김민지(Kim, Min-Ji),도성록(Do, Sung-Lok),최종민(Choi, Jong-Min),이광호(Lee, Kwang Ho) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.11
Among various types of geothermal heat pump systems, Vertical Closed-Loop Geothermal Heat Pump (VGSHP) has received increasing attention due to a variety of advantages such as the potential to be installed in a relatively small space and improved energy efficiency. In this research, the performance of VGSHP system coupled with heat storage tank was evaluated, by analyzing operational behavior of heat storage tank, the variations of heat pump energy performance due to the connection with heat storage tank, part load ratios characteristics of heat pump and the corresponding energy cost, compared to chiller and boiler based conventional system. The results of this study showed that the VGSHP system coupled with heat storage tank showed an energy saving effect of about 18% for cooling and about 73% for heating, and annual heating/cooling energy cost reduction of 43,000,000 KRW ($ 39,000), compared to the conventional air conditioning system. In addition, after considering both energy cost and initial investment cost including equipment, installation and auxiliary device expenses, payback period of approximately 11.8 years was required.
아파트 건물에서 재실자 활동량이 고려된 PMV제어에 따른 연간 국가 차원의 1차 에너지 및 온실가스 감축량 분석
홍성협(Hong, Sung-Hyup),도성록(Do, Sung-Lok),이광호(Lee, Kwang Ho) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.10
In this study, the effects of considering hourly metabolic rate variations for predicted mean vote (PMV) control on the heating and cooling energy and greenhouse gas emission were investigated. The case adopting PMV control taking the hourly metabolic rate into account was comparatively analyzed against the conventional dry-bulb air temperature control, using a detailed simulation technique. Under the assumption that all the apartments in Korea adopt the PMV control incorporating real-time metabolic rate measurements, nationwide reductions of primary energy and greenhouse gas emission were analyzed. As a result, PMV control considering hourly metabolic rate variations is expected to reduce national primary energy by 6.2% compared to conventional dry-bulb air temperature control, corresponding to reduction of 10,342 GWh. In addition, it turned out that 6.6% of tCO2 emission can be reduced by adopting PMV control, corresponding to nationwide reduction of greenhouse gas emission by approximately 1,720,000 tCO2.
정동은(Dong Eun Jung),이찬욱(Chanuk Lee),도성록(Sung Lok Do) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.6
In South Korea, more than 24% of the total national energy consumption is from the building sector, wherein building energy consumption has rapidly increased. As a result, it is critically important to reduce building energy consumption. In particular, windows of building envelopes are generally vulnerable on heat loss and gain from the solar radiation and insulation level of the glazing material. Various types of external shading devices are widely used to efficiently control the intake of solar illuminance and insolation. Additionally, shading affects heat transfer through the window glazing. That is, the heat transfer performance of window glazing varies by the type of shading devices and operation. Eventually, building energy loads decrease or increase from the heat transfer performance changed by the shading. Thus, the heat transfer analysis of the window glazing with shading devices must better evaluate building energy loads. To achieve this, this study conducted a computer-aided simulation and analysis to evaluate the amounts of conduction, convection, and radiation heat rates through a window with different shading devices.