Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to refrigeration units.

Heat pumps can extract heat from the air or suck heat from the ground.

Heat pumps work well in moderate climates, where summers are long and winters are mild.

Heat pumps can move thermal energy in a direction which is opposite to the direction of spontaneous heat flow.

Heat pumps are used to provide heating because less high-grade ( i. e., low-entropy ) energy is required for their operation, than appears in the released heat.

Heat pumps can move thermal energy against a thermal gradient at the expense of an external source of power, usually a mechanical compressor.

Heat pumps use a refrigerant as an intermediate fluid to absorb heat where it vaporizes, in the evaporator, and then to release heat where the refrigerant condenses, in the condenser.

Heat pumps are more effective for heating than for cooling an interior space if the temperature differential is held equal.

Heat pumps take mechanical work to regenerate thermal energy in a temperature gradient.

Heat pumps therefore have a provision for occasional defrost of the outdoor coil.

Heat from the nozzle and combustion chamber powers the fuel and oxidizer pumps.

Category: Heat pumps

Category: Heat pumps

Category: Heat pumps

Heat pumps extract heat from the ground and use it to heat the building.

Walsh had no great name recognition during his half-century as a working director, but his noirs White Heat ( 1949 ) and The Enforcer ( 1951 ) had A-list stars and are seen as important examples of the cycle.

Heat engines are often confused with the cycles they attempt to mimic.

Blues harmonica players who are primarily or mainly associated with the instrument include Norton Buffalo, Jerry Portnoy, Lazy Lester, Bob Dylan, Sugar Blue, Billy Branch, Charlie Musselwhite, Corky Siegel, Junior Wells, Ron " Pigpen " McKernan, Kim Wilson, Slim Harpo, Al " Blind Owl " Wilson of Canned Heat, Jack Bruce of Cream and John Sebastian of The Lovin ' Spoonful.

The schools with the most-lasting effect in founding the modern versions of thermodynamics are the Berlin school, particularly as established in Rudolf Clausius ’ s 1865 textbook The Mechanical Theory of Heat, the Vienna school, with the statistical mechanics of Ludwig Boltzmann, and the Gibbsian school at Yale University, American engineer Willard Gibbs ' 1876 On the Equilibrium of Heterogeneous Substances launching chemical thermodynamics.

Heat exchanging coils for the steam heating of hydrochloric acid are made from tantalum.

Some such proteins are highly specific in their function, such as protein disulfide isomerase ; others are very general and can be of assistance to most globular proteins-the prokaryotic GroEL / GroES system and the homologous eukaryotic Heat shock proteins Hsp60 / Hsp10 system fall into this category.

Heat rejection is kept low-mass using advanced heat pipe systems ( such as are now used in some laptop computers for cooling as well ).

Although dissertations on clothing and its functionality are found from the 19th century as colonising countries dealt with new environments, concerted scientific research into psycho-social, physiological and other functions of clothing ( e. g. protective, cartage ) occurred in the first half of the 20th century, with publications such as Flugel's Psychology of Clothes in 1930, and Newburgh's seminal Physiology of Heat Regulation and The Science of Clothing in 1949.

Heat loss and reception are aided by extensive land mass.

Heat is mostly carried to the surface by thermal convection, although there are two thermal boundary layers-the core-mantle boundary and the lithosphere-in which heat is transported by conduction.

Heat can also be provided electrically by resistive heating, in which conductive filaments are heated by the passage of electricity.

This may cause a problem where it's cheaper to buy electricity than to burn fuel, therefore many engines are used in CHP ( Combined Heat and Power ) configurations that can be small enough to be integrated into portable container configurations.

Heat loss and reception are aided by extensive land mass.

Heat exchangers are expensive, requiring drilling for some heat-pump types or large spaces to be efficient, and the heat pump industry generally competes on price rather than efficiency.

Heat conduction within a solid is directly analogous to diffusion of particles within a fluid, in the situation where there are no fluid currents.

The Miami Heat are a professional basketball team based in Miami, Florida, United States.

Along with the Orlando Magic, the Heat are one of the two NBA franchises that represent the state of Florida.

During the first year ( Tronc Commun, or “ Common Trunk ”), students are required to take classes in science ( Mathematics, Physics, Biology ); in engineering ( Continuum Mechanics, Heat transfer, Digital image processing, Computer programming ,…) and in social sciences ( Economics, Management, foreign languages ,…).

Many Heat fans felt that Johnson, knowing the Knicks had already won Game 4, deliberately provoked Mourning with only a second left on the clock so that he would be suspended for the series-deciding game, in an attempt to not only give the Knicks extra leverage, but to avenge the suspensions from the previous year.

The novel features a fictionalized version of the already fictional Richard Castle, named " Jameson Rook ", who enters into a partnership with Heat that mirrors Castle's working relationship with Beckett.

* Heat — Sensitivity is expressed in terms of the temperature at which flashing or explosion of the material occurs.

While compared unfavorably to White Heat by critics, it was fairly successful at the box office, with $ 500, 000 going straight to Cagney Productions ' bankers to pay off their losses.

Two of which signed, and one resigned, with the Miami Heat, leading to a season that was heavily centered on their eventual success or failure at taking home the championship.

Heat capacity of liquid < sup > 4 </ sup > He at saturated vapor pressure as function of the temperature.

Heat is more likely to increase the risk of mortality in cities at mid-latitudes and high latitudes with significant annual temperature variation.

Heat treatment of a xerogel at elevated temperature produces viscous sintering ( shrinkage of the xerogel due to a small amount of viscous flow ) and effectively transforms the porous gel into a dense glass.

For example, according to the Heat Index, a relative humidity of 75 % at 80 ° F ( 27 ° C ) would feel like 83. 574 ° F ± 1. 3 ° F ( 28. 652 ° C ± 0. 7 ° C ) at ~ 44 % relative humidity.

The singles " Only Time Will Tell " ( No. 17 ) and " Heat of the Moment " ( No. 4 ) became huge Top 40 hits, with the latter cracking the Top Five, and the former remaining a stadium favourite at U. S. sporting events.

* " Heat of the Moment " is featured in the film The Matador in the scene in which Pierce Brosnan's character must commit an assassination at a horse race.

His interest in this branch of physics and chemistry dates back at least as far as 1874, when he discussed the " Latent Heat of Liquid Gases " before the British Association.

Heat transfer across materials of high thermal conductivity occurs at a higher rate than across materials of low thermal conductivity.

Rothstein would resign as head coach at the end of the season, but later would return to the Heat prior to the 2004 – 05 season as an assistant coach, a role he still fulfills today.

By the end of February, with the Heat languishing at 24-29, Riley continued overhauling the team.

Along with their individual scoring dominance, Mourning and Hardaway formed one of the most dangerous tandems in the league at the time, bringing a new excitement to the Miami community and turning the Heat into perennial contenders.

The Heat were the biggest surprise and the league's most improved team in the season ; they won their first-ever Atlantic Division title with a 61 – 21 record, the best regular season record in Heat history at the time.

After three failed attempts at a championship run and two consecutive seasons of first round-heartbreak against the determined Knicks, the Heat looked forward to the 1999-2000 season.

Once again, the Heat showed tremendous promise in the regular season, starting off 15-4 while still playing at Miami Arena.

On January 2, 2000, the Miami Heat defeated the Orlando Magic in the first game ever played at AmericanAirlines Arena.

Game 3 was at Madison Square Garden, with the Heat winning in overtime.

With Wade out, the Heat lost 91 – 66 in Game 6 at Detroit, setting up Game 7 in Miami.