Research on geothermal utilization as energy saving measures for hot springs (J)

Abstract

Hot springs are mineral-contining groundwater above 25 ° C. Usually, a post-cooking boiler is used to maintain an appropriate temperature of 42 ° C. The general super sento has a scale of 30 tons of water from the basement every day (the same amount of drainage) and 200 to 300 tons of circulating water, and the water that needs heating is circulated by heating with city gas or heavy oil. . The required fuel economy is said to be about 2 to 3 million yen / month, which is the most expensive expense. We report on the results of our research on a geothermal heating method that does not require 80% fuel cost.