Forced air flows over a convection heat exchanger in a room heater, resulting in a convective heat transfer coefficient 1.136 k W/m2 K. The surface temperature of heat exchanger may be considered constant at 65 degree Celsius, and the air is at 20 degree Celsius. Determine the heat exchanger surface area required for 8.8 k W of heating

Forced air flows over a convection heat exchanger in a room heater, re

1.	Forced air flows over a convection heat exchanger in a room heater, resulting in a convective heat transfer coefficient 1.136 k W/m²K. The surface temperature of heat exchanger may be considered constant at 65 degree Celsius, and the air is at 20 degree Celsius. Determine the heat exchanger surface area required for 8.8 k W of heating
A.	0.272 m<sup>2</sup>
B.	0.472 m<sup>2</sup>
C.	0.172 m<sup>2</sup>
D.	0.672 m<sup>2</sup>
Answer» D. 0.672 m<sup>2</sup>

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