What is the difference between the heat transfer coefficient K and the heat supply coefficient α? What are their specific definitions and meanings?
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What is the difference between the heat transfer coefficient K and the heat supply coefficient α? What are their specific definitions and meanings?
Heat transfer coefficient α: According to Newton’s law of cooling, dQ = α A△t. The unit of the heat transfer coefficient α is W/(m2 *℃). Its physical meaning is the amount of heat transferred by heat conduction per unit time, per unit area of heat transfer, when the temperature difference is 1K. The heat transfer coefficient K value refers to the amount of heat transferred per square meter in 1 second under stable heat transfer conditions, when there is a temperature difference of 1 degree (K, °C) between the air on either side of the building envelope; the unit is watts per square meter per degree (W/㎡·K), where K can be replaced by °C