For offices to feel comfortable, we like the relative humidity indoors to be about 50% and...
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For offices to feel comfortable, we like the relative humidity indoors to be about 50% and the temperature to be about 20°C. An office is normally ventilated: out- side air flows through the office, where it is heated by a radiator. At the same time the office loses heat through the walls. We assume that the air properties in the office are homogeneous throughout the office. The situation can be summarized with the following schematic: vent out conductive heat loss radiator: ( vent in a) How much water (in grams) would the air contain in a small one-person office of 20 cubic metres? b) Suppose we measure a 30% relative humidity in this office. Calculate whether we can bring the relative humidity in the office up to the comfortable level by closing the air vents and putting a cup of water on the radiator? An office typically refreshes its air content every twenty minutes or so, that is, air in the office gets completely replaced by outside air over the duration of twenty minutes. For offices to feel comfortable, we like the relative humidity indoors to be about 50% and the temperature to be about 20°C. An office is normally ventilated: out- side air flows through the office, where it is heated by a radiator. At the same time the office loses heat through the walls. We assume that the air properties in the office are homogeneous throughout the office. The situation can be summarized with the following schematic: vent out conductive heat loss radiator: ( vent in a) How much water (in grams) would the air contain in a small one-person office of 20 cubic metres? b) Suppose we measure a 30% relative humidity in this office. Calculate whether we can bring the relative humidity in the office up to the comfortable level by closing the air vents and putting a cup of water on the radiator? An office typically refreshes its air content every twenty minutes or so, that is, air in the office gets completely replaced by outside air over the duration of twenty minutes.
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Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
Posted Date:
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