【Daily Question】Test Issue 20150908
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This post was last edited by xuexmxj on 2015-9-9 15:10. Reward for participation: 2 wealth points. Reward for correct answer: 9 Wealth. The height of a certain industrial building is 15 m; the total heat loss of the building’s envelope during winter heating is calculated to be 1500 kW. The heat transfer coefficient of the exterior windows is 3.5 W/(m2·K). What should be the heat loss due to cold air infiltration? (A) 375kW (B) 450kW (C) 525kW (D) 600kW The answer is B
A certain industrial building is 15 m in height. The calculated total heat loss of the building’s envelope during winter heating is 1500 kW. The heat transfer coefficient of the exterior windows is 3.5 W/(m2·K). What should be the heat loss due to cold air infiltration? (B) 450kW
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A certain industrial building is 15 m in height. The calculated total heat loss of the building’s envelope during winter heating is 1500 kW. The heat transfer coefficient of the exterior windows is 3.5 W/(m2·K). What should be the heat loss due to cold air infiltration? B (A) 375kW (B) 450kW (C) 525kW (D) 600kW
A certain industrial building is 15 m in height. The calculated total heat loss of the building’s envelope during winter heating is 1500 kW. The heat transfer coefficient of the exterior windows is 3.5 W/(m2·K). What should be the heat loss due to cold air infiltration? (B) 450kW (A) 375kW (B) 450kW (C) 525kW (D) 600kW
The heat loss due to cold air infiltration is 450kW
A certain industrial building is 15 m in height. The calculated total heat loss of the building’s envelope during winter heating is 1500 kW. The heat transfer coefficient of the exterior windows is 3.5 W/(m2·K). What should be the heat loss due to cold air infiltration? (A) 375kW (B) 450kW (C) 525kW (D) 600kW Answer: B Analysis: According to clause D.0.4 of the Heating Code, the heat loss due to cold air entering industrial buildings through gaps in doors and windows can be estimated using Table D.0.4. The heat transfer coefficient of the exterior window is 3.5 W/(m2·K). According to clause 2.2.6 of the \"Technical Measures,\" this is a double-glazed window; therefore, cold air infiltration accounts for 30% of the total heat loss, with the amount of cold air infiltration being 1500*0.3=450 Kw