Based on the supply status statistics of new renewable energy according to public obligation system, current status of overall application centered on solar heat, solar ray, and geothermal heat as energy sources that can be applied to buildings may be analyzed as follows.
(1) After the public obligation system, the investment costs on the total construction costsby years were between 5.21% and 7.12%: they were 7.12% in 2004, where the system was initially implemented; and they were gradually declined from 2005 to 2011, 5.76% in average.The ratio of equipment investment per energy sources in the total construction costs was 5.9%, which was slightly more than the obliged ratio.Theorder of investment costs per energy source was solar ray, geothermal heat, and solar heat.
(2)Among the1,433 sitesin the plan of new renewable energy installation based on the public obligation system,“forcultural & socialuse” was most in target institution, and facilities for education & research was most in use classification, followed by public working, culture & rally, and sports. The number of facilities applied according to the case for planning installation per use classification ofthe target institution was between 1.1 and 1.5,or1.4 in average of energy source.
Conclusively, the authors of this study investigated overall current status of new renewable energy supply from thean alysis of statistic data, and it may be needed of further supplementation of various examinations by visiting investigation and interviews with practitioners based on classification of use of target institutions.