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(School of Architecture, Seoul National University of Science and Technology)
Purpose: This study is to analyze the characteristics of energy usage in apartment houses that had built for 20 years recently in capital area and the correlation between the characteristics of energy usage and the regulation of energy efficiency in building. Method: It is investigated 264 apartment sites having been built since 1991 where 312,071 houses live. The sites were listed on Naver map. Quantities of energy usages in the sites were searched in a portal, Green Together being operated by the Ministry of Land, Infrastructure and Transport. The appraisal report of building energy in the portal is recording usage quantity of gas energy, district cooling & heating energy, electric energy, total energy, 1st gas energy, 1st district cooling & heating energy, 1st electric energy, 1st total energy, etc. Result: Analyzing the average of total energy usage from 1991 to 2012, the average in 2001, 2008 each was reduced more than 10 percent compared to the previous year. It was analyzed that the reduction was relevant to building energy-saving design criterion which have been tightened more than before.