Journal•ISSN: 0369-8009
Journal of the Society of Mechanical Engineers, Japan
The Japan Society of Mechanical Engineers
About: Journal of the Society of Mechanical Engineers, Japan is an academic journal. The journal publishes majorly in the area(s): Combustion & Robot. It has an ISSN identifier of 0369-8009. Over the lifetime, 1549 publications have been published receiving 3880 citations.
Topics: Combustion, Robot, Boundary layer, Surface modification, Jet (fluid)
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TL;DR: In this paper, the authors show that the quantity of heat transmitted from a metal surface to boiling water increases as the temperature difference ΔT is increased, but after the ΔT has reached a certain limit, quantity Q decreases with further increase in ΔT.
Abstract: The quantity of heat transmitted from a metal surface to boiling water increases as the temperature difference ΔT is increased, but after the ΔT has reached a certain limit, quantity Q decreases with further increase in ΔT. This turning point is the maximum value of heat transmitted. The existence of this point was actually observed in the experiment. Under atmospheric pressure, ΔT corresponding to the maximum value of heat transfer for water at 100°C falls between 20 degC to 40 degC, and Q is between 1080000 and 1800000 kcal/m2 h (i.e. between 2000 and 3000 kg/m2h, if expressed in constant evaporation rate at 100°C) ; this figure is larger than the maximum value of heat transfer as was previously considered. Also, the minimum value of heat transfer was obtained, and in the Q−ΔT curve for the high temperature region, the burn-out effect is discussed.
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