Evaluation of Heat Loss from Hot Water Supply System and Insulation Retrofit in a Hotel ― Thermal Analysis of the Piping System and Storage Tank ―

抄録

The heat loss from a hot water supply system was measured in a budget hotel in Kansai area, which has a shower in each guest room. It was found that more than 40% of the heat supply was lost. By retrofitting the system, the heat loss was significantly reduced. Visual inspection and numerical calculation using a simple thermal model clarified that thermal bridging and rain penetration were the main reasons for a large heat loss from hot water supply system.