Mechanical Engineering :: Heat and Mass Transfer
- In heat exchangers, degree of approach is defined as the difference between temperatures of
- Fouling factor is used
- The natural convection air cooled condensers are used in
- The concept of overall coefficient of heat transfer is used in heat transfer problems of
- An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m²). The critical thickness of insulation will be
- The logarithmic mean temperature difference (tm) is given by (where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit)
- Emissivity of a white polished body in comparison to a black body is
- The heat of sun reaches to us according to
- Thermal diffusivity of a substance is
- The insulation ability of an insulator with the presence of moisture would
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