Outdoor air infiltrates into a building through cracks in the walls at the rate of 700 m3/h (this is infiltration). The outside air is at a temperature of -16.1˚C and a humidity ratio of 0.001 kgv/kga. The density of the outside air is 1.4 kg/m3. The indoor conditions are: temperature of 20˚C and humidity ratio of 0.009 kgv/kga. Calculate: a) The sensible heat load (in kW) due to the infiltrating air b) The latent heat load due (in kW) to the infiltrating air • The specific heat for air at these temperatures is about 1.005 kJ/(kg K). • The latent heat of vaporization (or condensation) is 2453 kJ/kg

Outdoor air infiltrates into a building through cracks in the walls at the rate of 700 m3/h (this is infiltration). The outside air is at a temperature of -16.1˚C and a humidity ratio of 0.001 kgv/kga. The density of the outside air is 1.4 kg/m3. The indoor conditions are: temperature of 20˚C and humidity ratio of 0.009 kgv/kga. Calculate: a) The sensible heat load (in kW) due to the infiltrating air b) The latent heat load due (in kW) to the infiltrating air • The specific heat for air at these temperatures is about 1.005 kJ/(kg K). • The latent heat of vaporization (or condensation) is 2453 kJ/kg

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter34: Indoor Air Quality

Section: Chapter Questions

Problem 17RQ: The recommended relative humidity for a home is between A. 500/0 and 70%. B. and 40%. C. and 50%. D....

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