Question

A house is maintained at 1 atm and 24 oC, and warm air inside a house is forced to leave the house at a rate of 150 m3 /h as a result of outdoor air at 5 oC infiltrating into the house through the cracks. Determine the rate of net energy loss of the house due to mass transfer.

Answer 1

1.045 KW

Step-by-step explanation:

Rate of heat transfer is determined with the rate of change of specific enthalpy of the air.

Using relation

Q= mCpΔT

=рVCpΔT

`=\frac{P}{RTin_{} }` VCp (
`(Tin_{} -Tout_{} )`

=(101.35/0.287×297)×150×1.005(24-5)/1×60×6=1.045 KW