HVAC 59 Questions And Answers

Heat Transfer Theory - ️️Heat moves from an area of higher temperature to an area of lower temperature Conduction - ️️Transfer of heat by particles in direct contact Convection - ️️Transfer of heat by the circulation through a liquid or gas Radiation - ️️Transfer of heat through an intervening space. No air motion is required for the heat transfer. How Building Materials Radiate Heat - ️️Reflectance Absorbance Evaporation - ️️Transfer of heat by moisture flow. Heat is carried away from wet surfaces. Thermal Resistance - ️️Indicates how effective any material is as an insulator. Measured as an R-value for a given material Insulating Material - ️️Resists the conduction of heat Thermal Capacity - ️️The ability of a material to store heat and is roughly proportional to a material's mass or weight. Measured as the amount of heat required to raise the temperature of a unit of the material one degree.