831 減圧・蓄熱式電気温水器の沸騰騒音抑制(GS-10 振動一般(2))

概要

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On the use of a regenerative and vacuum hot-heater boiler, during the water temperature in it is rather low, the big metallic noise caused sounds off and on. The authors propose a noise reduction method covering a heater by Cu wires, in order to reduce such an unwanted sound. The nucleus of bubble caused by the nucleate boiling could be kept continuously on the surface of a covered heater, and the boiling phenomena has been continuing with creating fine bubbles. The boiling condition was turned into the continuous boiling by our proposed method, and the noise level has become decrease about 15dB. However, the much thinner the wire used was, the less the effect of noise reduction was become. On the other hands, the unusual noise was sounded when the heater was covered by much thicker wire. By the experimental results, it has been clear that the effect of this noise reduction method is influenced by the diameter of wire cover the heater.
一般社団法人日本機械学会の論文
2000-03-16