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공기, 지열 및 복합 열원 열펌프의 중간기 에너지 소비량에 관한 연구
조영욱(Yeong Uk Cho),우태호(Tea ho Woo),정광섭(Kwang-Seop Chung),김영일(Youngil Kim) 한국지열·수열에너지학회 2013 한국지열에너지학회논문집 Vol.9 No.4
This study is to compare energy consumption of air-source, ground-source and dual-source heat pump systems during intermediate season using dynamic simulation. Ground-source heat pump has higher COP than that of air-source but requires additional power consumption of auxiliary equipment such as circulation pump. During intermediate season when the outdoor air temperature is favorable, total COP of air-source heat pump may be greater than that of ground-source when circulation pump power consumption is included. Dual-source heat pump which selects the more favorable heat source is compared with air-source only and ground-source only heat pumps for total power consumption. Results show that power consumption of dual-source heat pump is lower than that of ground-source only by 0.73%.
조영욱(Yeong Uk Cho),김영일(Young Il Kim),정광섭(Kwang-Seop Chung) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.7
The objective of this research is to study the variation of optimum slope angles of collectors for seven regions in Korea, which are Seoul, Gangneung, Daejeon, Daegu, Gwangju, Busan and Jeju. The results for 2000~2007 are analyzed to see if adjustment of slope angles is necessary each year to receive maximum solar radiation. For an azimuth fixed solar collector, solar radiation of yearly optimized slope angle during May~Sept.(summer), Nov.~Mar.(winter) and the whole year are greater than the fixed slope angle by 0.03%, 0.02%, and 0.04%, respectively. For an azimuth tracking solar collector, solar radiation of yearly optimized slope angle during May~Sept.(summer), Nov.~Mar.(winter) and the whole year are greater than the fixed slope angle by 0.03%, 0.07%, and 0.04% respectively. It is unnecessary to adjust slope angles each year for both azimuth fixed and tracking collectors, since the gains are insignificant. Solar radiation of the azimuth tracking solar collector during May~Sept., Nov.~Mar. and the whole year are greater by 14.7%, 16.0%, and 19.2% than the azimuth fixed solar collector.
공동주택에서 에너지효율등급과 에너지성능지표의 상관관계에 관한 연구
조영욱(Yeong Uk Cho),김정윤(Jeong Yoon Kim),김정혁(Jung Hyuk Kim),박선효(Sun Hyo Park),정광섭(Kwang Sub Joung) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Our country has a higher level of energy dependence and therefore rely on imports from foreign countries and energy demand structure is vulnerable. This study analyzes correlation between primary energy consumption per area and energy performance index in certified energy efficient residential buildings with statistical approach. 34 residential buildings with district heating and 17 residential building with individual heating system were used for and the analysis. As a result of simple linear regression analysis, the result show that the lower the primary energy consumption resulted in higher energy performance index in residential buildings with district heating and its trend curve derivation was 0.48%. In conclusion, there is low correlation between primary energy consumption and energy performance index.
공동주택에서 외피단열성능기준 강화에 따른 건축물에너지 효율등급 변화에 관한 연구
조영욱(Yeong Uk Cho),박선효(Sun Hyo Park),정광섭(Kwang Sub Joung) 대한설비공학회 2017 설비공학 논문집 Vol.29 No.2
This study aimed to compare the primary heating energy consumption of regional apartment houses based on the enhanced thermal insulation performance of building envelope standards. The difference of the heating energy consumption based on the enhanced thermal insulation performance of building envelope standards in the southern region, the largest regional difference in primary heating energy consumption, is 10.3 kWh/(㎡ ․year). The difference of the heating energy consumption based on the enhanced thermal insulation performance of building envelope standards in the central region is 8.0~8.5 kWh/(㎡․year) and that of the Jeju region is 0.5 kWh/(㎡․year). These energy consumption differences do not result in building energy efficiency ratings changing. The building energy efficiency ratings have the possibility to be changed.
비주거 건축물에서 에너지효율등급과 에너지성능지표의 상관관계에 관한 연구
김정윤(Jeong Yoon Kim),김정혁(Jung Hyuk Kim),조영욱(Yeong Uk Cho),김영일(Young Il Kim),정광섭(Kwang-Seop Chung) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Our country has a higher level of energy dependence and therefore rely on imports from foreign countries and energy demand structure is vulnerable. Thus, there exist various energy policies related to the energy performance of buildings which will aim for the greenhouse gas reduction target in building sector. This study analyzes correlation between primary energy consumption per area and energy performance index in certified energy efficient non-residential buildings. 35 non-residential buildings were used and the analysis showed that there was low correlation between these two. Energy saving plan can introduce errors on evaluation of overall energy performance of the building due to incompleteness of application items. Therefore there is a need to change the evaluation approach which will evaluate the energy performance by its annual energy consumption.