COOLING STRESS

The temperature point below which a material, especially metal, is brittle; that is, the critical normal stress for fracture is reached before the critical shear stress for plastic deformation.

Determine the amount of heat or cooling that is required to maintain a constant temperature in a building.

A parameter devised to measure the air's cooling effect upon a human body; it is determined by the amount of heat required by a device to maintain the device at a constant temperature (usually 34 C); the entire system should be made to correspond, as closely as possible, to the external heat exchange mechanism of the human body.

The development of a steep temperature gradient and accompanying high stress within a material or structure.

1. The algebraic mean of mean stress mean temperature difference the maximum and minimum values of a periodically varying stress. 2. See octahedral normal stress.

The difference between the temperature of the water leaving a cooling tower and the wet-bulb temperature of the surrounding air.

A major type of fog, produced over land when radiational cooling reduces the temperature to or below its dew point. Radiation fog is a nighttime occurrence although it may begin to form by evening twilight and often does not dissipate until aft sunrise.

The lowest temperature to which air can be cooled at any given time by evaporating water into it at constant pressure, when the heat required for evaporation is supplied by the cooling of the air. This temperature is indicated by a well-ventilated wet-bulb thermometer. See also FREE-AIR TEMPERATURE.

A curve obtained by plotting time against temperature for a solidliquid mixture cooling under constant conditions.

The process of cooling a liquid to a temperature below its saturation temperature for any given saturation pressure.