Study on the Loads of Hot Water Consumption in a Hot Spa Facility

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  • 温浴施設の給湯負荷に関する調査研究
  • オンヨク シセツ ノ キュウトウ フカ ニ カンスル チョウサ ケンキュウ

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We need the accurate estimation of energy consumption and the correct decision of performance and capacity for designing and planning of building systems. Therefore, it is important to survey and study on the actual condition of hot water consumption which is largely affected with energy consumption in each building. In Japan, many hot spa facilities, which are public bathhouses, are built because of the people's concern for health in these days. However, the data of hot water consumption which applies to designing and planning are insufficient. On the existing designing and planning, the volume of hot water consumption is estimated roughly and the hot water supply systems are not designed optimally. The purpose of this study is to clarify the characteristics of hot water consumption of a hot spa facility located in Hiroshima City. The objective hot spa facility has two bathrooms for male and female, a restaurant, and a massage room, etc. As for the hot water supply system, the hot water is heated by four electric water heaters, four CO_2 heat pump water heaters, and two hot water boilers. As for the measurements of hot water consumption and temperature, the measurements were carried out at four seasons over a year and all data were recorded in every one-minute. We obtained the data for the number of customers from the manager in this building. On the basis of these data, at first, the number of customers in the restaurant and the bathrooms were analyzed and the customer's tendencies of fluctuation grouped into weekday, Saturday, and holiday were clarified. Next, the cold and hot water temperature, consumption and heat loads were analyzed in each usage of the hot spa facility.

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