The rate of flow of air arising due to the difference in temperature of outside and inside is given by the expression ____________(a) Q = 320 C.A. [h(T-t)]^½(b) Q = 320 C.A. x h(T-t)(c) Q = 640 C.A. [h(T-t)]^½(d) Q = 640 C.A. x h(T-t)This question was addressed to me by my school principal while I was bunking the class.Origin of the question is Air Conditioning in chapter Acoustics and Ventilation of Construction & Building Materials

The rate of flow of air arising due to the difference in temperature o

1.	The rate of flow of air arising due to the difference in temperature of outside and inside is given by the expression ____________(a) Q = 320 C.A. [h(T-t)]^½(b) Q = 320 C.A. x h(T-t)(c) Q = 640 C.A. [h(T-t)]^½(d) Q = 640 C.A. x h(T-t)This question was addressed to me by my school principal while I was bunking the class.Origin of the question is Air Conditioning in chapter Acoustics and Ventilation of Construction & Building Materials
Answer» The correct answer is (c) Q = 640 C.A. [h(T-t)]^½ To explain: The rate of flow of air arising due to the difference in temperature of OUTSIDE and inside is given by the expression Q = 640 C.A. [h(T-t)]^½. Here, C stands for coefficient of EFFECTIVENESS, Q is the rate of air flow in m^3/h, A is the FREE area of the INLET opening, h is the vertical height difference between inlet and outlet, T is the AVERAGE temperature of inside air and t is the average temperature of outside air in degree Celcius.

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