Annual cost of heat loss through pipes.xls
KNOWN: Length, diameter, surface temperature and emissivity of steam line. Temperature and convection coefficient associated with ambient air. Efficiency and fuel cost for gas fired furnace.
FIND: a) Rate of Heat loss
b)Annual cost of heat loss
ASSUMPTIONS: 1) Steam line operates continuously throughout year.
2) Net radiation transfer is between small surface (steam line) and large enclosure (plant walls).
Fundamentals of Heat and Mass Transfer by Frank P. Incropera
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