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인젝터 하이브리드 팽창 시스템을 이용한 히트펌프의 성능향상 연구
노철우(Chul Woo Roh),한경호(Kyeongho Han),김민수(Min Soo Kim) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
In this study, we propose an injector-hybrid expansion system (IHES) and its operating control methods in a R410A heat pump system. The use of injector in a heat pump system is the first try in the world. By the injector operation, the mass flow rate of refrigerant in a heat pump system is boosted by 150 % of the mass flow rate in a steady-state operating condition. The temporary increased mass flow rate increases heating and cooling capacity as well as heating and cooling coefficient of performance (COP). Test results show that the heating capacity was increased by about 5% and the heating COP was increased by about 6.2% with using the IHES.
PHEV 시장 형성 시 전력망에 미치는 영향 및 최적 충전 제어전략에 관한 연구
노철우(Chul Woo Roh),김민수(Min Soo Kim) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.4
Plug-in hybrid electric vehicle (PHEV) with capability of being recharged from the power-grid will reduce oil consumption. Also, the PHEV will affect the utility operations by adding additional electricity demand for charging. In this research, the power-grid impact by demand of PHEV charging is presented and the optimal charging control strategy for utility operators is proposed with simulated data. The penetration of PHEV is assumed to be 50% in the circumstances of Korean passenger car market and Korean power-grid market limitedly. To obtain smooth load shape and utilize the surplus electricity in power-grid at midnight and dawn, the peak of charging demand should be controlled to be located before 4:00 a.m., and the time slot which can supply the electricity power to PHEV should be allowed between 1:00 a.m.~7:00 a.m.
플러그인 하이브리드 전기자동차의 연료 경제성에 관한 연구
노철우(Chul Woo Roh),김민수(Min Soo Kim) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.4
The most concerning issue of these days is the energy crisis caused by increasing threat of dependence on imported oil and volatile market trend. Under these circumstances, the PHEV(plug-in hybrid electric vehicle) is drawing attention for the next generation’s car which could give a chance to decrease the dependence on imported oil and reduce the environmental impact of vehicle. The fueling cost of PHEV, one of the core factor of decision about buying car, should be calculated in the circumstances of Korea to make sure that PHEV has competitive power in real market. The fuel cost saving of PHEV versus CV(conventional vehicle) is simulated and discussed in the condition of increasing gasoline cost, electricity rate, and city-gas rate. In conclusion, the PHEV60-FS shows the best economic feasibility when gasoline price goes up. The PHEV20 has the most stable economic feasibility as electricity rate increases. The fuel cell cogeneration system for RPG could be an alternative for charger of PHEV in the near future.
Vapor-injection cycle 이용 히트펌프의 난방 성능 향상에 미치는 중간압력 영향에 관한 연구
노철우(Chul Woo Roh),김민수(Min Soo Kim) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
In this study, the target system which has an additional expansion valve at the outlet of condenser is presented. The concept of intermediate pressure is applied to the target system, whose cycle characteristic is analyzed. Effect of the intermediate pressure on the heating performance for various injection ratios was measured and analyzed for compressor frequency ranging from 60 to 100 ㎐. Unlike conventional vapor-injection cycle, the maximum injection ratio is highly affected by the intermediate pressure. The high intermediate pressure provides high initial heating capacity and COP; but it restricts the available range of vapor-injection within narrow limits. The result indicates that a proper operating strategy is needed for the vapor-injection cycle in this study.
완벽주의가 인지, 정서, 행동, 신앙에 미치는 영향과 기독교상담 방안
노철우 ( Chul Woo Roh ),전요섭 ( Jo Seph Jeon ) 한국복음주의신학회 2013 성경과신학 Vol.68 No.-
이 연구는 완벽주의가 인지, 정서, 행동, 그리고 신앙에 미치는 부정적 영향을 연구하고, 이러한 문제해결을 위한 기독교상담 방안을 시도하였다. 연구자는 완벽주의 문제에 대한 다면적 이해를 돕기 위해 완벽주의 개념 및 발생원인, 완벽주의의 폐해 대해 살펴보았다. 그 결과 완벽주의는 인지, 정서, 행동, 신앙적 면에서 여러 가지 문제를 일으키고 있었다. 이 연구에서는 기독교 인지행동치료를 중심으로 네 가지 기독교상담 방안이 제시되었다. 첫째, 상담자는 완벽주의 탐색을 통해 내담자로 하여금 자신의 완벽주의가 인지, 정서, 행동, 신앙적 측면에서 부정적 반응을 유발한다는 것을 자각하도록 돕는다. 이를 위해 상담자는 먼저 감정을 수용하고 신뢰관계를 형성한다. 둘째, 내담자의 완벽주의 사고를 실제적으로 조절할 수 있도록 상담자의 개입이 필요하다. 연구자는 인지왜곡 다루기를 통해 완벽주의의 가장 핵심적 인지왜곡인 이분법적 사고, 과잉일반화 사고, 그리고 당위적사고에 대한 적절한 치료적 방안을 제시했다. 셋째, 상담자는 인지적 재구성을 통해 내담자의 조절된 사고를 더욱 합리적, 성경적 사고로 강화시키는 작업을 한다. 넷째, 상담자는 내담자에게 결단을 촉구한다. 믿음은 내담자가 불안한 감정으로부터 자기 스스로를 지키기 위해서 발전시켜 왔던 회피들을 멈출 수 있는 힘을 부여하기 때문에 상담자는 내담자가 믿음으로 활기차고 부지런하며 행동하는 결단을 가져오도록 도와야 한다. This paper aims to analyze the negative effects of perfectionism on cognition, emotion, behavior, and Christian belief and attempts to solve those problems on the basis of Christianity. The concept and specific features, causative factors of perfectionism, types of perfectionism and the harmful effects of perfectionism were broadly examined in order to obtain a multi-sided understanding of the problems caused by perfectionism. The result of research revealed that various problems of cognition, emotion, behavior, and Christian belief were being caused by perfectionism. In this study, we discuss four aspects of the Christian counseling method, which are centered on cognitive behavioral therapy. First, a counselor should help the client realize that perfectionism induces negative reactions in the aspects of cognition, emotion, behavior, and Christian belief. To achieve this goal, a counselor should promote the acceptance of feelings and development of rapport. Second, a counselor should intervene in order to help the client control his or her thought patterns based on perfectionism. A counselor should also intervene with proper treatment of symptoms of perfectionism, such as dichotomous thinking, which is regarded as the core cognitive distortion found in perfectionists, as well as overgeneralized thinking and masturbating. Third, a counselor should focus on tasks aimed at changing the client`s rigid and perfectionist ways of thinking into rational and biblical ways of thinking through cognitive reframing. Finally, a counselor should encourage the client to make a commitment firmly and thoroughly to his or her belief.
저출산 고령화에 따른 일본 에너지 및 건축설비 트렌드 변화에 관한 연구
노철우(Chul Woo Roh),백영진(Young-Jin Baik),신형기(Hyung-Ki Shin),이길봉(Gilbong Lee),이범준(Beomjoon Lee),조준현(Junhyun Cho),나호상(Hosang Ra) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
The population of the republic of Korea shows a severe low birthrate and population aging. This phenomena will induce a radical change in energy and HVAC(heating, ventilation and air conditioning) market in near future. From the year of 2030, it is known that Korea will experience abrupt decrease of energy demand by the low birthrate and population aging. Thus, an inevitable recession will occur in many industrial sectors related with energy conversion. Therefore, the influence of low birthrate and population aging on various energy market should be discussed and revealed in detail with an initiative research. This paper discusses the influence on the building energy system and related HVAC market trends by using Japanese case studies. The renewal needs of existing old HVAC system will often increase sales of the related market. The HEMS(home energy management system) market should prepare a strategy for various needs from seniors with considering their life style.