| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an energy-saving type circulation hot water system without generating a combustion gas or the like containing an atmosphere pollutant such as CO<SB>2</SB>. <P>SOLUTION: In this circulation hot water system 1, water in a bathtub 2 is recovered and passed through a filter 7 or the like to filter it, thereafter passed through a heat exchanger 8 to be heat, passed through a filter 9 for a countermeasure against Legionella bacteria to be sterilized, and returned to the bathtub 2 again after subjected to a chlorine sterilization process. Raw water used for heating the water in the bathtub 2 is heated in a raw water tank 21 by a burner 25 using hydrogen gas as a fuel. The hydrogen gas is provided by electrolyzing the raw water in a hydrogen fuel unit 26. The raw water can be efficiently heated without generating a combustion gas containing an atmosphere pollutant such as CO<SB>2</SB>unlike the case where a general heating device such as a boiler is used. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
