Chapter 1 Basics of Heat Transfer1-19 An electrically heated house maintained at 22°C experiences infiltration losses at a rate of 0.7 ACH. The amount of energy loss from the house due to infiltration per day and its cost are to be determined.Assumptions 1 Air as an ideal gas with a constant specific heats at room temperature. 2The volume occupied by the furniture and other belongings is negligible. 3The house is maintained at a constant temperature and pressure at all times. 4 The infiltrating air exfiltrates at the indoors temperature of 22°C. Properties The specific heat of air at room temperature is = 1.007 kJ/kg.°C (Table A-15). CpAnalysisThe volume of the air in the house is V==((floor space)(height)m )(3 m)m23200600=5°C0.7 ACH 22°C AIR Noting that the infiltration rate is 0.7 ACH (air changes per hour) and
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.