evaporative cooling chemistry definition
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Evaporative cooler Evaporative coolers lower the temperature of air using the principle of evaporative cooling, unlike typical air conditioning systems which use vapor-compression refrigeration or absorption refrigerator. Evaporative cooling is the addition of water vapor into air, which causes a lowering of the temperature of the air.
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- In direct evaporative cooling, the water content of the cooled air increases because air is in contact with the evaporated water. In indirect evaporative cooling, evaporation occurs inside a heat exchanger and the water content of the cooled air remains unchanged.
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What is Evaporation? - Definition & Examples - Definition & Examples. Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. Evaporation is a fundamental part of the water cycle and is constantly occurring throughout nature.
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Vaporization Vaporization (or vaporisation) of an element or compound is a phase transition from the liquid phase to vapor There are two types of vaporization: evaporation and boiling. This diagram shows the nomenclature for the different phase transitions.vaporation is a phase transition from the liquid phase to vapor (a state of substance below critical temperature and critical pressure) that occurs at temperatures below the boiling temperature at a given pressure. Evaporation usually occurs on the surface.
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The Secrets to Keeping Cool with Evaporative Coolers | NewAir Water is pumped up and poured onto a specialized cooling pad that has warm air blown through it by a high-powered fan. The water absorbs the heat and evaporates and cool air gets blown out the other side. The rate of evaporation is inversely proportional to the humidity of the surrounding area.
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Centrifugal Chiller - Fundamentals The evaporator is a heat exchanger that removes the building heat from the chilled water lowering the water temperature in the process. The heat is used to boil the refrigerant changing it from a liquid to a gas. McQuay Distinction™ chillers use a flooded type evaporator, which is very energy efficient.
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- Evaporative coolers draw hot air from outside through a series of wet filter pads that are supplied with water from a tank at the base of the unit. Water from the filter pads evaporates, drawing heat out of the air and humidifying it. The cooled, moist air is then blown through the house. Evaporative coolers work partly by cooling the air inside the house and partly by creating a cooling breeze.
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What is Evaporation? - Definition & Examples Evaporation is the process by which water changes from a liquid to a gas or vapor. Water boils at 212 degrees F (100 degrees C), but it actually begins to evaporate at 32 degrees F (0 degrees C); it just occurs extremely slowly. As the temperature increases, the rate of evaporation also increases.
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Direct and Indirect Cooling Systems Direct and Indirect Cooling Systems. Any surface of heat transfer in which volatile liquid expands and evaporates to produce a cooling effect is called direct expansion evaporator. Liquid absorbing die thermal energy is called direct expansion of the refrigerant.
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evaporate transitive verb. 1a : to convert into vapor; also : to dissipate or draw off in vapor or fumesb : to deposit (a substance, such as a metal) in the form of a film by sublimation. 2a : to expel moisture fromb : expel evaporate electrons from a hot wire. intransitive verb.
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- An open recirculating cooling system uses the same water repeatedly to cool process equipment. Heat absorbed from the process must be dissipated to allow reuse of the water. Cooling towers, spray ponds, and evaporative condensers are used for this purpose. Open recirculating cooling systems save a tremendous amount of fresh water compared to the alternative method, once-through cooling.
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condensation condensation. n. 1. the act or process of condensing, or the state of being condensed. 2. (General Physics) anything that has condensed from a vapour, esp on a window. 3. (Chemistry) chem a type of reaction in which two organic molecules combine to form a larger molecule as well as a simple molecule such as water, methanol, etc.
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WHAT IS THERMAL EVAPORATION? Thermal Evaporation is one of the simplest of the Physical Vapor Deposition (PVD) techniques. Material is heated in a vacuum chamber until its surface atoms have sufficient energy to leave the surface
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Difference Between Evaporation and Condensation Evaporation is the phase change of a liquid to the gas state. Evaporation is one of the two types of vaporization. The other form of vaporization is boiling. Evaporation occurs only on the surface of the liquid. When the energy of such a surface liquid molecule is increased due to any internal or external factor, the molecule will be able to break the intermolecular bonds acting on it, thus creating a gas molecule. This process can occur is any temperature.
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Evaporation Evaporation acts like an air conditioner for the surface because heat is used when water enters the atmosphere as moisture. But at the same time, water vapour acts as a green house gas by trapping radiation in the lower atmosphere. As temperature increases so does the process of evaporation. In addition the moisture holding capacity of the atmosphere increases with temperature. For every 1oC increase in global temperatures there is a 7% increase in the moisture holding capacity of the atmosphere.
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How To Buy Evaporative Coolers Get an energy-efficient, portable evaporative cooler. 1  Evaporative coolers, also called swamp coolers, combine the natural cooling properties of water with a steady breeze to lower indoor temperatures. 2  Evaporative coolers lower indoor temperatures by combining the natural cooling properties of evaporating water with an efficient air moving system. Evaporative coolers add moisture, with the water-filled pads acting as a filter, removing dust and allergens from the air.
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Vaporization Evaporation is a phase transition from the liquid phase to vapor (a state of substance below critical temperature and critical pressure) that occurs at temperatures below the boiling temperature at a given pressure.Evaporation usually occurs on the surface.vaporation is a phase transition from the liquid phase to vapor (a state of substance below critical temperature and critical pressure) that occurs at temperatures below the boiling temperature at a given pressure. Evaporation usually occurs on the surface.
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Evaporative cooler Evaporative cooler. An evaporative cooler (also swamp cooler, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from typical air conditioning systems, which use vapor-compression or absorption refrigeration cycles. Evaporative cooling works by exploiting water's large enthalpy of vaporization.
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Sublimation Definition (Phase Transition in Chemistry) Sublimation Definition. Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point. The term only applies to physical changes of state and not to the transformation of a solid into a gas during a chemical reaction.
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Sublimation Definition (Phase Transition in Chemistry) Share. Sublimation Definition: Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point. By Anne Marie Helmenstine, Ph.D. Example: Dry ice is solid carbon dioxide.
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evaporative emissions evaporative emissions. Definition. Cars & Driving. plural noun vapours or fumes not emitted by the exhaust system, but escaping from the fuel tank, carburettor and crankcase, and accounting for about 40 per cent of hydrocarbon emissions released by a petrol engine without emission controls.
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As water vapor rises in the atmosphere, it cools and changes into liquid cloud droplets in a process called:? For this question -- Evaporation is when water is slowly absorbed into the air, cooling the remaining water by carrying heat away in the molecules of water which become evaporated (examples: puddles evaporate in the sun, sweat evaporates from your skin).
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Evaporative cooler Evaporative cooling is especially well suited for climates where the air is hot and humidity is low. In the United States, the western/mountain states are good locations, with evaporative coolers prevalent in cities like Denver, Salt Lake City, Albuquerque, El Paso, Tucson, and Fresno.
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- Evaporation is a geologic process that concentrates the ion solute residues in the ocean basins. At a fundamental level, evaporation is the transition of the molecule of a liquid from the liquid state to the gaseous state by diffusion from the surface of the liquid.
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Orlando shooting: Gunman Omar Mateen was a closet homosexual, say friends - as wife faces charges after 'helping him scope out attack' T he owner of another Orlando LGBT club says he got a Facebook friend request last week from the gunman in the Pulse nightclub shooting. According to WKMG-TV, owner Michael Bass says he looked through Omar Mateen's Facebook friend list and didn't see anything that would relate to an LGBT club, so he rejected the friend request.
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Cooling curve A cooling curve of naphthalene from liquid to solid. A cooling curve is a line graph that represents the change of phase of matter, typically from a gas to a solid or a liquid to a solid. The independent variable (X-axis) is time and the dependent variable (Y-axis) is temperature. Below is an example of a cooling curve used in castings. The initial point of the graph is the starting temperature of the matter, here noted as the pouring temperature. When the phase change occurs there is a thermal arrest, that is the temperature stays constant. This is because the matter has more internal energy as a liquid or gas than in the state that it is cooling to. The amount of energy required for a phase change is known as latent heat.