S081011 実工場におけるヒートポンプ熱源のための排熱回収効率の経時変化([S08101]高効率ヒートポンプの要素技術とその応用)

概要

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We evaluated time-dependent variation in heat recovery efficiency of a fin and tube type heat exchanger using exhausted gas from drying furnaces in an actual factory in order to confirm feasibility to apply a high temperature type heat pump as a heat source of a manufacturing process. We conducted a measurement experiment at similar temperature to the heat pump system for about five months. Thereafter, an acceleration test was conducted for six months. As a result, the heat transfer coefficient of the outer surface of the heat exchanger depended on Reynolds number of the exhausted gas. The heat transfer coefficient was best about two months after the beginning, and it had slightly decreased on next month, after that, it hadn't largely changed. The fouling factor was assumed to be 0.0014 m2K/W. Consequently the heat recovery system from the exhausted gas is able to keep its performance in more than one year.
一般社団法人日本機械学会の論文
2011-09-11