(Solved) : Discuss Car Inside Temperature High Park Car Outside Sunny Day Even Shade Relation Glass Q33025169 . . .
a. Discuss why car inside temperature is high when you park thecar outside in a sunny day even under the shade and the relationwith glass transmissivity (Greenhouse effect). [5 marks]
b. A double walled spherical tank is used to store iced water atO’C. The tank internal diameter is 2 m and wall thickness is 0.5cm. The inner and outer walls are separated with the 2 cm thickspace. The air between the two walls of the tank is evacuated inorder to minimize the heat transfer. The surfaces surrounding theevacuated space are polished so that each surface has anemissivity, e = 0.15. The temperature of the outer wall of the tankis measured to be 20″C. Assume the inner wall of the steel tank isat 0″C and conduction resistances of the walls are negligible.Determine:
The rate of heat transfer to the iced water írÍ the tank [5marks]
ii. The amount of ice at 0″C that melts during a 24 h period. [5marks]
c. A thermocouple is used to measure the temperature of hot airflowing in a duct, whose walls are maintained at 000 K shows atemperature reading of 700 K. lf the emissívity of the thermocouplejunction ís 0.6 and the convection heat transfer coefficient is 100Wlm2.K, determine the actual temperature of air. [5 marks]
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