A hermetically sealed room 4 m x 4 m x 4 m has an internal sensible heat gain of 3 kW. The overall heat – transfer coefficient of its wall, floor and ceiling is 1.1 W/m2K. The outside temperature is constant at 37 °C. Calculate the steady – state temperature of the room. What will be the temperature maintained inside the room if the ventilation air supplied is equivalent to 10 air changes per hour?
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
A hermetically sealed room 4 m x 4 m x 4 m has an internal sensible heat gain of 3 kW.
The overall heat – transfer coefficient of its wall, floor and ceiling is 1.1 W/m2K. The
outside temperature is constant at 37 °C. Calculate the steady – state temperature of the
room. What will be the temperature maintained inside the room if the ventilation air
supplied is equivalent to 10 air changes per hour?
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