Question:-
An air-conditioned room of volume 10 m3 has infiltration of air equivalent to 3 air changes. Density of air is 1.2 kg/m3, specific heat Cp is 1 kJ/kg - K and temperature difference between room and ambient air is 20 K. The sensible heat load due to infiltrated air is
Option (A)
60 kJ/hr
Option (B)
l2 kJ/hr
Option(C)
6 kW
Option(D)
0.2 kW
Correct Option:
(D)
Question Solution:
SHL = mcp.DT
(3 x 10)(m3/hr) x 1.2(kg/m3) x 1(KJ/(kg-K)) x 20K
= 720(KJ/hr) = (720/3600)(KJ/sec) = 0.2kW
question-answer-faq-9400