Acronym for the U.S. Environmental Protection Agency. 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. A colorless liquid that burns with a pale flame, producing water and carbon dioxide. Abbreviation for Electric Vehicle. The collector fluid flows through an absorber tube that is contained inside an evacuated glass cylinder.
Air passing through the water is cooled as the water evaporates.
The process can be reversed by condensing the vapor on a cool surface. 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. Loss of water from the soil both by evaporation and by transpiration from the plants growing theron. A covering designed to reduce the flux of heat and excess light into a building.