【Daily Topic】【HVAC Version 20160714】
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Participation reward: 2 Wealth. Reward for the correct answer: 9 wealth. \"Thermal conductivity\" refers to the amount of heat transferred through an area of 1 m2 in a period of lh by thermal conduction, under steady-state conditions. In which of the following situations does this occur? ( ) a. The thickness of the material layer is 1 m, with a temperature difference of 1℃ between the air on both sides. b. There is a temperature difference of 1℃ between the inner and outer surfaces of the building envelope. c. There is a temperature difference of 1℃ between the air on both sides of the building envelope. d. The thickness of the material layer is 1 m, with a temperature difference of 1℃ between the surfaces on both sides℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
b. The temperature difference between the inner and outer surfaces of the enclosure structure is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃
d. The thickness of the material layer is 1 m, and the temperature difference between the two surfaces is 1℃