3712 減圧式電気温水器の局所サブクール度制御による低騒音化

概要

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On the use of a regenerative and vacuum-electric boiler, the big noise sounds off and on during the water temperature in it is rather low. The authors propose a noise reduction method controlling locally the temperature around the heater, in order to reduce such an unwanted sound. The major reason of such noise should be the difference between the temperature around the heater, which is decided from the saturated vapor diagram. The above difference has been called the degree of subcooling in this paper. The lager the degree of subcooling is, the bigger noise would be caused. In order to make the degree of subcooling smaller, it was proposed to control the temperature around the heater covered by a cylindrical cover with some holes at upper and lower parts of it. It was clear to be an effective method for the noise reduction that the degree of subcooling around the heater was controlled within 2K by setting the lower hole open and close.
一般社団法人日本機械学会の論文
2000-07-31