Range of Heat Transfer Coefficients for different Convection Processes - GATE ME '98

Heat transfer coefficients for free convection in gases, forced convection in gases and vapors, and for boiling water lie, respectively, in the range of ______ A. 5−15, 20−200, and 3000−50000 W/m^2.K B. 20−50, 200−500, and 50000−100000 W/m^2.K C. 50−100, 500−1000, and 100000−1000000 W/m^2.K D. 20−100, 200−1000, and a constant 1000000 W/m^2.K

Ans: Heat transfer coefficient for free convection in gases and vapors lies between range

5-15 W/m^2.K

Heat transfer coefficient for forced convection in gases and vapors lies between range 20-200 W/m^2.K

Heat transfer coefficient for boiling and condensation processes lies between range 3000-50000 W/m^2.K