Cardset

is the process of treating air so as to control simultaneously its temperature, humidity, cleanliness and distribution to meet the requirements of the conditioned space.

is to control the temperature, humidity, purity (that is, removal of dust and impurities) and air movement or circulation.

is the process of supplying or removing air by natural or mechanical means to or from any space. Such air may or may not have been conditioned.

is the study of the properties of air

is an instrument used in the study of properties of air.

is air whose condition is such that any decrease in temperature will result in condensation of the water vapor into liquid.

is air containing superheated vapor.

 is a binary mixture of dry air and water vapor.

is the non-condensing components of the mixture, mainly the Nitrogen and  Oxygen.

is the condensable component of the mixture, the water vapor which may exist in a saturated or superheated state.

is the temperature of air as registered by an ordinary thermometer.

is the temperature of air as registered by a thermometer whose bulb is covered by a wetted wick and exposed to a current of rapidly moving air.

is the difference between the readings of the wet and dry bulb thermometers.

is the saturation temperature corresponding to the actual pressure of the steam in air or the temperature at which condensation of moisture begins when the air is cooled at constant pressure.

the total pressure of air-water vapor mixture, is the sum of the partial pressures of dry air and water vapor.

is the ratio of the mass of water vapor to the mass of dry air. It is also known as moisture content, mixing ratio or specific humidity.

is the ratio of the partial pressure of water vapor in the air to the saturation pressure corresponding to the temperature of the air.

is the number of cubic meters of mixture per kilogram of dry air.

is the reciprocal of specific volume.

is the enthalpy of the mixture of dry air and water vapor, and is the, and is the sum of the enthalpy of the dry air and enthalpy of the water vapor

is a branch of science that deals with the process of cooling of a space or substance below the environmental temperature.

is an assembly of four major components, namely, the compressor, condenser, expansion valve and the evaporator through which a very low boiling point substance flow in a cycle and absorbs heat from the immediate surroundings, thereby producing the cooling effect

is a sequence of thermodynamic processes whereby heat is withdrawn from a cold body and expelled to a hot body.

removal of heat by utilizing a refrigerant subjected to cycles of refrigerating thermodynamics and employing a mechanical compressor.

refrigerant gas evolved in the evaporator is taken up in an absorber and released in a generator upon the application of heat.

uses air as refrigerant. In many aspect, air-cycle equipment is ideally suited for use in aircraft.

uses water as refrigerant.