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김효경(H.K.K.m),김상범(S.B.Kim),하종배(J.B.Ha) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
A vehicle contributes to current environmental situations such as air pollution and wastes. In recent years there have been increasing demands for car manufacturers to solve these problems. In order to respond to these claims, much researches or actions at the car manufacturers are already underway.<br/> This paper summerizes the current trends of environmental pressures : environmental regulation, environmental standard, the relation between environment and trade. In addition, this paper tries to propose some methods to respond to these issues.<br/>
김효경,이기영,박문수,황인수,Kim H.K.,Lee G.Y.,Park M.S.,Hwang I.S. 대한설비공학회 1987 설비저널 Vol.16 No.4
A study of appling solar assisted heat pump heating system to Korean climatic charac-teritics has been undertaken through computer simulation using TRNSYS (A Transient System Simulation Program). It is insufficient for heating system composed of each of solar and heat pump system to supply heat met with heating load. So SAHP (Solar Assisted Heat Pump) heating systems which combined solar system with heat pump system are analized using the standard weather data of Korea. And SAHP heating systems are categorized into the series system in which the solar storage is used as the source for the heat pump, the parallel system in which ambient air is used as the source for the heat pump, and the dual source system in which the storage or ambient is used as the source depending on which source yields the lowest work input. These combined system are better than each of solar and heat pump heating system in view of thermal performance, and parallel system is most effective among these combined systems.
태양열에 의한 냉방 및 난방시스템의 성능향상(Ⅱ) - 태양열을 이용한 흡수식 냉동기의 성능 -
박문수(M.S.Park),김무근(M.G.Kim),김효경(H.K.Kim),노승탁(S.T.Ro) 대한설비공학회 1989 설비공학 논문집 Vol.1 No.1
The purpose of this study is to obtain the dynamic characteristics of an absorption refrigerator powered by solar energy by experiments. Since the absorption refrigerator power by solar energy should have the characteristics which is suitable for the intermittence and rarity of solar energy, not only the characteristics of the steady state operations but also the partial load and the transient operations should be considered. The minimum available temperature of the storage tank should be known, and the absorption refrigerator can be suitably selected for air-conditioning systems. In this study, the experimental data of the transient state for on-off and warming-up operations has been obtained. Also the experiments are performed which test the minimum available temperature of the storage tank. The results show that it takes 1 hour to get to the steady state of the absorption refrigerator, and the minimum available temperature of the storage tank is about 68℃, and show that in the partial load operations the performance of the absorption refrigerator is improved by applying the modified control method to on-off operations.