Posted inHeat & Mass Transfer
FOULING FACTOR
1) The performance of heat exchangers usually deteriorates with time as a result of accumulation of deposits on…
Posted inHeat & Mass Transfer
THE OVERALL HEAT TRANSFER COEFFICIENT
2) In the analysis of heat exchangers, it is convenient to combine all the thermal resistances…
Posted inHeat & Mass Transfer
RADIATION EXCHANGE WITH EMITTING AND ABSORBING GASES
1) Gases that consist of monatomic molecules such as Ar and He and symmetric diatomic molecules such as N2 and O2 are essentially transparent…
Posted inHeat & Mass Transfer
RADIATION HEAT TRANSFER: DIFFUSE, GRAY SURFACES
1) The analysis of radiation transfer in enclosures consisting of black surfaces is relatively easy but…
Posted inHeat & Mass Transfer
RADIATION HEAT TRANSFER: DIFFUSE, GRAY SURFACES
1) The analysis of radiation transfer in enclosures consisting of black surfaces is relatively easy but…
Posted inHeat & Mass Transfer
THE VIEW FACTOR or SHAPE FACTOR
1) Radiation heat transfer between surfaces depends on the orientation of the surfaces relative to each…
Posted inHeat & Mass Transfer
RADIATION INTENSITY
1) b) In general, the differential solid angle dĪ subtended by a differential surface area dA when viewed from a…
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BLACKBODY RADIATION
1) A body at a temperature above absolute zero emits radiation in all directions over a…
Posted inHeat & Mass Transfer
THERMAL RADIATION
1) The electromagnetic spectrum includes cosmic waves, gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation,…
Posted inHeat & Mass Transfer
COMBINED NATURAL AND FORCED CONVECTION
1) Whether the convection is force or natural is found out by finding out the ratio…