Slide 1

HEAT BALANCE & HUMIDITYMOCH. YUSUF AL GHAZALI12314100751-EHUMIDITYFor air at an atmospheric pressure of 1 atm, a dry bulb temperature of 100F and a wet bulb temperature of 65F, determine from the humidity chartThe humidityThe dew pointThe enthalpyThe spesific volume per pound of dry air

Humidity = 38 grains of moisture/lb of dry airDew point = 41FEnthalpy = 30 Btu/lbSpecific volume = 14,24 ft

HEAT FLOWA layer of pulverized cork 6 in. (152 mm) thick is used as a layer of thermal insulation in a flat wall. The temperature the cold side of the cork is 40F (4,4F), and that of the warm side is 180F (82,2C). The thermal conductivity of the cork at 32F (0C) is 0,021 Btu/ft-h-F (0,036 W/m-C), and that at 200F (93,3C) is 0,032 (o,o55). The area of the wall is 25 ft2 (2,32 m2). What is the rate of heat flow through the wall in Btu per hour (watts)?Trata-rata = Interpolasi: k = 0,021 + = 0,021 + 0,005 = 0,026 Btu/ft-h-FA = 25 ft3T = 180 40 = 140FB = Q = = = 182 Btu/h = 53,3 W