What is coefficient of lift?
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A 2 cm diameter glass rd (k = 0.8 W/mK) is 6 cm long. It has base temperature at 120ºC and is exposed to air at 20ºC. The temperature at the tip of the rod is measured as 35ºC. What is the convection heat transfer coefficient? How much heat is lost by the rod?
A shell-and-tube type of heat exchanger is designed to cool 1.512 kg/s of oil (Cp 2093 J/kg K) from 65.56° C to 42.22° C by using 1.008 kg/s of water at a inlet temperature of 26.67 °C. Assuming an overall heat transfer coefficient of 681.6 W/m²K and a single-shell, 2 tube pass type of heat exchanger determine the required heat transfer area. use the effectiveness method.