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Minggu, 08 Desember 2013

TEKNIK ISOLASI







Panas yang hilang per meter : 


Let us consider the following numerical example. 
 D1 = 82.5 mm; D2 = 89 mm; D3 = 189 mm (insulation thickness = 50 mm); insulation thermal 
conductivity = 0.07 W/(m K), thermal conductivity of pipe material = 67 W/(m K). The heat transfer 
coefficient in the pipe is hin = 1000 W/(m2
 K) and the heat transfer coefficient at the outside insulation 
surface is hout = 8 W/(m2
 K). The temperature of the fluid within the pipe is 90 oC and the ambient 
temperature is 20 oC

Koefisien heat transfer  :


Tebal pipa dapat diabaikan(terlalu tipis) , maka :



Sumber :

http://www.wiley.com/legacy/wileychi/morvayindustrial/supp/toolbox10.pdf KLIK DISINI


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