Answer / sharadha

O.H.T.C is usually used in conduction-convection systems
where there are several resistances in series formed on the
heat transfer surface.
I.H.T.C is used only for convection systems where der is
only a single resistance to the heat transfer surface.this
is d basic difference.

Answer / prokash

There are two type of heat transfer co-efficient.
Internal heat transfer co-efficient and external heat
transfer co-efficient. they are separately called individual
heat transfer coefficient. and the combined effect of them
to heat transfer is called Overall heat transfer coeficient.

Answer / apurva

Overall heat transfer coefficient is the conductance for all the materials through which heat is flowing. It can be obtain by adding individual heat transfer coefficients for each material.
Just like getting electrical resistance from the circuit, heat transfer coefficient varies with the material presence of material in the series or parallel attachments.

Answer / aroh shrivastava

the sum of indivisual heat transfer coeffincint that is
film coefficint is called UHTc. and when it take
indivisually it is called IHTC.

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Question 79 - (a) The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. Let SG = specific gravity of petroleum liquid, and V = barrels of crude oil per metric ton. Given the formula for API gravity = 141.5 / SG - 131.5 and V = (API gravity + 131.5) / (141.5 x 0.159), find the relationship of SG as a function of V. (b) An oil barrel is about 159 litres. If a cylinder with diameter d = 50 cm and height h = 50 cm is used to contain the oil, find the volume V of the cylinder in the unit of oil barrel by using the formula V = 3.142 x d x h x d / 4. (c) First reference : 1 cubic metre = 6.2898 oil barrels. Second reference : 1 cubic metre = 6.37 oil barrels. What are the 2 factors that cause the difference in such reference data?

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Hello i am a chemical engineer presently looking for a job i am applying many jobs in naukri and in all job portals but i am not getting any call or interview so kindly some one help me in this regard soundar

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