Either of two times of year when the sun passes over the celestial equator and when the length of day and night are almost equal. Abbreviation for Electric Vehicle. The collector fluid flows through an absorber tube that is contained inside an evacuated glass cylinder. An air-cooling unit that turns air into moist, cool air by saturating the air with water vapor. It does not cool air by use of a refrigeration unit.
Air passing through the water is cooled as the water evaporates.
The process can be reversed by condensing the vapor on a cool surface. Loss of water from the soil both by evaporation and by transpiration from the plants growing theron. World energy consumption in the mid-1990s was around 330 EJ per year. A covering designed to reduce the flux of heat and excess light into a building. Exterior shadings or awnings include any type on the outside of the building designed to limit solar penetration.