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Topic: Heat of condensation

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	Heat
		Heat of fusion Heat of fusion is the temperature.
		The heat of fusion is equal to the heat of solidification.
		Latent heat flux Latent heat flux is the flux of heat from the earth's surface to the atmosphere that is associated with...
	www.brainyencyclopedia.com /topics/heat.html (950 words)

	HVAC-Talk: Heating, Air & Refrigeration Discussion - Question 41 (Site not responding. Last check: 2007-11-05)
		The latent heat of condensation in the condenser.
		The latent heat of vaporization in the condenser.
		The latent heat of condensation in the evaporator.
	hvac-talk.com /vbb/showthread.php?postid=436765#post436765 (218 words)

	Heat of vaporization - Wikipedia, the free encyclopedia
		It is defined as the heat required to vaporize one mole of a substance at its boiling point under standard pressure (101.325 kPa).
		Because vaporization is the opposite process of condensation, the term heat of condensation is also used.
		The latter is defined as the heat released when one mole of the substance condenses at its boiling point under standard pressure.
	en.wikipedia.org /wiki/Heat_of_condensation (182 words)

	Double effect absorption machines (Site not responding. Last check: 2007-11-05)
		The vapor is then condensed at this higher temperature and pressure and the heat of condensation is used to drive the generator of the bottoming cycle (secondary generator), which is at a lower temperature.
		If the heat added to the generator is thought to be equivalent to the heat of condensation of the refrigerant, it becomes clear where the efficiency improvement comes from.
		The water vapour evaporated in the generator at a higher temperature and pressure is condensed to liquid form in the condenser, where the heat of condensation is picked up by the cooling water from an absorber outlet circulating in the condenser tubes.
	www.voltasacnr.com /double.htm (558 words)

	Large Steam System Condensers - Heat Exchanger - Engineers Edge (Site not responding. Last check: 2007-11-05)
		The steam's latent heat of condensation is passed to the water flowing through the tubes of the condenser.
		Excessive condensate depression decreases the operating efficiency of the plant because the subcooled condensate must be reheated in the boiler, which in turn requires more heat from the reactor, fossil fuel, or other heat source.
		Its suction is attached to the condenser, and it discharges to the atmosphere.
	www.engineersedge.com /heat_exchanger/large_steam_condenser.htm (1123 words)

	Heat Transfer
		Latent heat is the heat energy required to change a substance from one state to another.
		Heat is taken from your skin to evaporate the water on your body.
		Specific heat is the amount of heat needed to raise the temperature of one gram of a substance one degree Celsius.
	okfirst.ocs.ou.edu /train/meteorology/HeatTransfer.html (903 words)

	Heat of Vaporization - Snow and Avalanche Glossary (CSAC) (Site not responding. Last check: 2007-11-05)
		The heat of vaporization is defined as the heat required to vaporize one mole of a substance at its standard boiling point.
		When heat is added to a liquid, the kinetic energy of the molecules in the liquid increases and the increased motion of the molecules is reflected by a rise in the temperature of the liquid.
		The continued addition of heat at that temperature is used to break down the intermolecular attractive forces, and also must provide the energy necessary to expand the gas.
	www.csac.org /Education/glossary/heat-of-vaporization.php (222 words)

	RMP Lecture Notes
		The primary function of a condenser is to remove latent heat, although it is sometimes necessary to remove sensible heat as well.
		Condensing vapor may be a single component or a mixture, with or without the presence of noncondensibles.
		The flow may be laminar or turbulent, depending on the fluid, rate of condensation, tube size, etc. The film tends to thicken as it flows to the bottom of the tube, and the weight of the fluid may cause ripples to form.
	www.cbu.edu /~rprice/lectures/condense.html (589 words)

	Condensation Heat Transfer, (Site not responding. Last check: 2007-11-05)
		Condensation heat transfer is a vital process in the process and power generation industries and has, as a result, been an area of research for over a hundred years.
		The type of condensation behaviour which a metal displays is related to it’s surface energy.
		This apparatus allows dropwise condensation to be observed at different locations in the bundle and for pressure drops through the bundle and the heat transfer to each of the 15 rows of tubes to be measured.
	www.hw.ac.uk /mecWWW/research/dam/cht.htm (473 words)

	SQUARE ONE : Condensation (Site not responding. Last check: 2007-11-05)
		Humidity within a space can be offset by additional heating (which raises the temperature therefore lowers the relative humidity), or by ventilation which removes air humidified by moisture given off in the use of the building (human respiration, cooking etc.).
		There is also a small additional benefit in that the condensation of moisture in a dehumidifier releases latent heat of condensation.
		Each litre of water condensed gives about two-thirds of a kWh of heat to the room, in addition to the energy used to drive the unit, which is also released to the room.
	www.squ1.com /thermal/condensation.html (944 words)

	Heat Pump
		The heat transport capability of the heat pipe is raised by increasing the wick thickness.
		Heat pipe has been, and is currently being, studied for a variety of applications, covering almost the entire spectrum of temperatures encountered in heat transfer processes.
		Heat pipes designed to move 75 watts are usually flat with fin stacks from three to six inches, in many cases with fins mounted on each side of the CPU input pad.
	www.colorado.edu /ASEN/asen5519/11heatpump_files/Heat-Pump-Text.htm (2649 words)

	Specific heat of condensation - Wikipedia, the free encyclopedia
		When a gas changes into a liquid it releases energy as heat.
		In the case of water forming as precipitation, rain or snow, the heat warms the ambient atmosphere.
		Different substances release different amounts of heat when they condense, benzene, for example, has a different specific heat of condensation than water.
	en.wikipedia.org /wiki/Specific_heat_of_condensation (127 words)

	Online Dictionary for French English, Spanish English, Italian English, and more.
		Heat liberated by a unit mass of gas at its boiling point as it condenses into a liquid; "the heat of condensation is equal to the heat of vaporization."
		The heat evolved or absorbed during the formation of one mole of a substance from its component elements.
		Heat absorbed by a unit mass of a solid at its melting point in order to convert the solid into a liquid at the same temperature; "the heat of fusion is equal to the heat of solidification."
	www.ultralingua.net /?service=ee&text=heat (586 words)

	Condensation
		Condensation polymer Condensation polymers (or polyamides) are any class of polymer formed through a condensation react...
		Condensation reaction A condensation reaction (also known as a dehydration reaction) is a hydrolysis reaction, ie, the...
		Wealth condensation Wealth condensation is a theoretical process by which, in certain conditions, newly-created invest i...
	www.brainyencyclopedia.com /topics/condensation.html (125 words)

	Making Clouds and Rain
		Condensation of water onto condensation nuclei (or deposition of water vapour as ice on freezing nuclei) begins at a particular altitude known as the cloud base or lifting condensation level.
		It is assisted by the property of water of giving off heat when changing from vapour to liquid and solid states, the latent heats of condensation and of deposition, respectively.
		The first is by the continued condensation of water vapour into cloud droplets and thus increasing their volume/size until they become droplets.
	www.islandnet.com /~see/weather/elements/makerain.htm (2389 words)

	Recipe for a Hurricane Relies on Happenstance (washingtonpost.com) (Site not responding. Last check: 2007-11-05)
		That physical change releases heat as predictably as the rapid sundering of chemical bonds that reduces a piece of burning wood to a pile of ash.
		It is called the "heat of condensation," and it appears as detectable heat, just as the evaporating water produced measurable cooling.
		This releases the heat of condensation, which restores some of the lost heat to the column of air, causing it to rise some more.
	www.washingtonpost.com /wp-dyn/articles/A16776-2004Sep12.html (778 words)

	HEAT SIPHON® Installation
		Heat Siphon's exclusive full flow titanium heat exchanger requires no special plumbing arrangements or bypass.
		Standard model Heat Siphons have slip glue fittings which accept 1 1/2 Schedule 40 PVC pipe for connection to the pool or spa filtration piping.
		Condensation: Since the Heat Siphon cools down the air about 6 -10° F, water may condense on the fins of the horseshoe shaped evaporator.
	www.heatsiphon.com /installPLUMB.html (316 words)

	speleogenesis.net \| Viewpoints and Comments by Wolfgang Dreybrodt (Site not responding. Last check: 2007-11-05)
		Degassing of CO2 creates a CO2-containing atmosphere, which is heated by the warmer water below and becomes saturated with vapor, which condenses to the cooler wall of the cave, dissolves limestone and flows back to the lake.
		The reason is that condensation of water at the cave wall releases heat of condensation of 2.45 kJoule/g.
		For the reasons stated above the heat of condensation and the heat flux from the air raise the temperature of such samples much quicker than that of the cave walls.
	www.speleogenesis.info /archive/sg2/Dreybrodt/index.htm (564 words)

	What is condensation?
		Condensation is the formation of liquid drops from water vapor.
		This is the heat that was absorbed when the water was originally evaporated from the surface of the Earth.
		Another way in which condensation occurs is during the formation of dew.
	www.weatherquestions.com /What_is_condensation.htm (152 words)

	Air Conditioning - Latent Heat Removal
		Condensation forming on supply air diffusers or registers is caused by insuficient airflow through the evaporator coil and the individual ducts that are sweating.
		The amount of heat energy in BTU's that must be removed to change the state of one pound of a vapor to one pound of liquid at the same temperature.
		Considering the restriction between the large oil burner heat exchanger and the bottom of the evaporator coil and supplies and returns at floor levels, —a study of the blower graph indicates these figures may be relevant.
	www.udarrell.com /air-conditioning-latent-heat.html (3511 words)

	Heat of vaporization
		The Heat of vaporization is the heat required to vaporize one mass unit (one gram) of a substance at its normal boiling point.
		The vaporization heat of water is 600 Calories per gram.
		Heat of vaporization is equal and opposite to its heat of condensation, any particular substance has a specific heat of condensation.
	www.fact-index.com /h/he/heat_of_vaporization.html (76 words)

	2.2 Desalination by distillation
		The energy used for evaporation is the heat of condensation of the steam.
		The heat of condensation is used to evaporate a film of saline water applied to the insides of the tubes within the evaporation chambers.
		Thus, the feedwater is heated in a boiler to a high energy level and passed through a steam turbine before the steam is extracted for use at a lower temperature to provide the heat required in the distillation plants.
	www.oas.org /usde/publications/Unit/oea59e/ch21.htm (2345 words)

	HVACR Consumer Information: How a Heat Pump Works (Site not responding. Last check: 2007-11-05)
		A heat pump is like a conventional air conditioner except it also can provide heat in winter.
		In the winter, the heat pump extracts heat from outside air and circulates it inside the house.
		The reversing valve directs the flow of hot, high pressure vapor to the outdoor coil where the heat released during condensation is fanned into the outdoor air, and the cycle begins again.
	www.ari.org /consumer/howdoesitwork/howHPwks.html (310 words)

	Milk Heat Recovery Main (Site not responding. Last check: 2007-11-05)
		Heating the water for these purposes requires about one-third of the electrical energy that is used in a dairy operation.
		This cold water, either from the bottom of the storage tank or from the cold water inlet, is needed to condense the hot vapor into cooler liquid refrigerant while absorbing and carrying away the heat of condensation.
		The amount of heat used for hot water on a dairy farm and the amount of heat that can be recovered from the refrigeration system both depend on the number of cows being milked.
	www.farminfo.org /dairy/milkheat-m.htm (1110 words)

	1999 Building Publications - Simple Prediction Method for Condensation Heat Transfer Inside a Micro-Fin Tube. (Site not responding. Last check: 2007-11-05)
		The method's fundamental premise is that the heat flux is directly proportional to the difference between the enthalpy of the vapor at saturated free stream conditions and the enthalpy of the condensed subcooled liquid at the wall.
		The traditional method for modeling in-tube condensation uses Newton's law of cooling, which defines the heat flux to be directly proportional to the temperature difference rather than the enthalpy difference.
		Kraay and Rite have used an enthalpy-based expression for the condensation heat flux where the condensation mass velocity was derived from kinetic theory.
	fire.nist.gov /bfrlpubs/build99/art057.html (278 words)

	USATODAY.com (Site not responding. Last check: 2007-11-05)
		Your body's heat is supplying the energy needed to speed up the molecular motion in the sweat to turn it into water vapor.
		This heat is latent heat, and the evaporated water is carrying it away from your body - it's cooling you off.
		The amount of latent heat involved in a process depends to some extent on the temperature at which the process is occurring.
	www.usatoday.com /weather/wlatent.htm (815 words)

	latent heat
		Latent heat is the heat energy involved in the phase change of water.
		The heat added during evaporation is used to break hydrogen bonds between water molecules and does not raise the temperature of the water body.
		Latent heat released during condensation is an important source of energy to drive atmospheric systems like hurricanes and cumulus clouds.
	www.uwsp.edu /geo/faculty/ritter/glossary/l_n/latent_heat.html (105 words)

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