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Page "Four-stroke engine" ¶ 32
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higher and fuel
The Teclu burner provides better mixing of air and fuel and can achieve higher flame temperatures than Bunsen burner.
The adiabatic combustion temperature ( also known as the adiabatic flame temperature ) increases for higher heating values and inlet air and fuel temperatures and for stoichiometric air ratios approaching one.
The expected increase of fuel efficiency of the engine ( caused by the higher temperature, as shown by Carnot's theorem ) could not be verified experimentally ; it was found that the heat transfer on the hot ceramic cylinder walls is higher than the transfer to a cooler metal wall.
William Aspdin's innovation was counterintuitive for manufacturers of " artificial cements ", because they required more lime in the mix ( a problem for his father ), a much higher kiln temperature ( and therefore more fuel ), and the resulting clinker was very hard and rapidly wore down the millstones, which were the only available grinding technology of the time.
This occurs because internal combustion engines are heat engines, and higher efficiency is created because higher compression ratios permit the same combustion temperature to be reached with less fuel, while giving a longer expansion cycle, creating more mechanical power output and lowering the exhaust temperature.
Direct fuel injection which can inject fuel only at the time of fuel ignition ( similar to a diesel engine ) is another recent development which also allows for higher compression ratios on gasoline engines.
The fuel cell can turn the chemical energy bound in hydrocarbon gases or hydrogen directly into electrical energy with much higher efficiency than any combustion process ; such devices have powered many spacecraft and are being applied to grid energy storage for the public power system.
To deliver the desired amount of energy, the fuel cells can be combined in series and parallel circuits, where series yields higher voltage, and parallel allows a higher current to be supplied.
They can reach a fuel-to-electricity efficiency of 50 %, considerably higher than the 37-42 % efficiency of a phosphoric acid fuel cell plant.
HCCI type engines take in both air and fuel, but continue to rely on an unaided auto-combustion process, due to higher pressures and heat.
By using a smaller turbocharger running at increased boost, slightly higher compression of 8: 1 and an improved fuel injection system with DITC ignition triggered by the flywheel, reliability improved and power rose to.
Redeployment of cruise ships, remedial berth construction, and high fuel costs prevented higher growth rates.
A higher water level in the tube slowed more neutrons in the core, causing more neutron capture by the gadolinium tube cladding rather than by the uranium fuel, thus lowering the power level.
There is a growing interest in developing a thorium fuel cycle due to its safety benefits, absence of non-fertile isotopes, and its higher occurrence and availability when compared to uranium.
Higher fuel pressures allow fuel to be supplied to higher-pressure combustion chambers for higher performance engines.
The Harrier is usually flown in STOVL mode which enables it to carry a higher fuel or weapon load over a given distance.
While fuel burn is still marginally higher than traditional engines, it is outweighed by other beneficial factors.
The absence of U-233 and its daughter products in the MOX fuel results in a lower activity in region 3 of the figure on the bottom right, whereas for RGPu and WGPu the curve is maintained higher due to the presence of U-233 that has not fully decayed.
For the secondary of a large nuclear weapon, the higher critical mass of less-enriched uranium can be an advantage as it allows the core at explosion time to contain a larger amount of fuel.

higher and vapor
Lighter components have a higher partial pressure and thus are concentrated in the vapor, but heavier volatile components also have a ( smaller ) partial pressure and necessarily evaporate also, albeit being less concentrated in the vapor.
Heating an ideal mixture of two volatile substances A and B ( with A having the higher volatility, or lower boiling point ) in a batch distillation setup ( such as in an apparatus depicted in the opening figure ) until the mixture is boiling results in a vapor above the liquid which contains a mixture of A and B.
Evaporation also tends to proceed more quickly with higher flow rates between the gaseous and liquid phase and in liquids with higher vapor pressure.
Green color-water vapor, red-carbon dioxide, WN-wavenumber ( caution: lower wavelength s on the right, higher on the left ).
Radiative energy losses become increasingly important higher in the atmosphere largely because of the decreasing concentration of water vapor, an important greenhouse gas.
The by-products of processing include ethane, propane, butanes, pentanes, and higher molecular weight hydrocarbons, hydrogen sulphide ( which may be converted into pure sulfur ), carbon dioxide, water vapor, and sometimes helium and nitrogen.
Above the triple point, solid ice when heated at constant pressure first melts to form liquid water, and then evaporates or boils to form vapor at a higher temperature.
Systems that have vapor pressures higher than indicated by the above formula are said to have positive deviations.
Because the azeotrope's vapor pressure is higher than predicted by Raoult's law, it boils at a temperature below that of either pure component.
From point 1 to point 2, the vapor is compressed at constant entropy and exits the compressor as a vapor at a higher temperature, but still below the vapor pressure at that temperature.
Preferred weather conditions include the absence of clouds and little water vapor in the higher atmosphere to minimize greenhouse effects and sufficient humidity of the air near the ground.
For this reason, a constant relative humidity (%) with different temperatures implies that when it's hotter, a higher fraction of the air is water vapor than when it's cooler.
The greater the number of carbon atoms, the higher the boiling point, density, viscosity, surface tension, critical properties, vapor pressure and refractive index.
Water vapor interferes with radio astronomy at higher frequencies, which has led to building radio observatories that conduct observations at millimeter wavelengths at very high and dry sites, in order to minimize the water vapor content in the line of sight.
For example, the lower stratosphere has much higher ozone concentrations than the upper troposphere, but much lower water vapor concentrations, so appropriate cutoffs can be used.
However, a higher relative humidity reduces the evaporation rate because of the higher vapor content.
Contamination of lamp fuel with even a small amount of gasoline results in a lower flash point and higher vapor pressure for the fuel, with potentially dangerous consequences.
Due to the increasing potential for a higher water vapor partial pressure at higher air temperatures, the water content of air at sea level can get as high as 3 % by mass at 30 ° C ( 86 ° F ) compared to no more than about 0. 5 % by mass at 0 ° C ( 32 ° F ).

higher and rises
McCullough and Farah also state that the risk of acquiring cancer rises almost five times for users of alcohol-containing mouthwash who neither smoke nor drink ( with a higher rate of increase for those who do ).
The granitic South Mountain rises to a somewhat higher elevation and shelters the valley from the climate of the Atlantic Ocean approximately 100 kilometres further south on the province's South Shore.
Above the gate there is a tower that rises three stories higher and has a turret-style roof.
When a parcel of air rises, it expands, because the pressure is lower at higher altitudes.
If, on the contrary, the upper air is cooler than predicted by the adiabatic lapse rate, then when the air parcel rises to its new height it will have a higher temperature and a lower density than its surroundings, and will continue to accelerate upward.
At, Grand Teton abruptly rises more than above Jackson Hole, almost higher than Mount Owen, the second highest summit in the range.
To complete the cycle, air rises to a higher altitude over land and then flows back toward the ocean.
The trail to and along its ridge passes by Grand Etang Lake and then rises up to the higher altitudes, cooler temperatures, and elfin mountain forests of the upper slopes.
At higher voltages, the threshold for the minimum radiation level drops, thus the counter's sensitivity rises.
If you see it at noon, it continues to be upright, and rises higher from the horizon as you move south.
Modern manufacturing techniques have produced devices with voltages lower than 5. 6 V with negligible temperature coefficients, but as higher voltage devices are encountered, the temperature coefficient rises dramatically.
Oldsmar sits like a plateau where the land elevation never rises higher than above sea level.
The water for the Alpine Pool cascades down gracefully from a spring that rises from an even higher peak in the mountains.
The surrounding topography in the village is correspondingly gentle rolling hills of this section of the Great Appalachian Valley between the higher rises of the Shawangunk Ridge, visible to the west from some sections of the village, and the Hudson Highlands to the southwest.
It also extends 5 – 6 miles to the north, where it is called Sage Hill and then rises a bit higher at Radar Hill, named for an old World War II Radar base installed at the peak.
" The bassline descends stepwise A, G, F, E, D, C, and B, while the strings ' part rises A, B, C, D, E, F #, G: this sequence repeats as the song fades, with the strings rising higher on each iteration.
Notably though, higher lift has more potential problems than increased duration, in particular as valve train rpm rises which can result in more inefficient running or loss of torque.
At, Mount Monadnock is nearly 1, 000 feet ( 300 m ) higher than any mountain peak within and rises 2, 000 feet ( 600 m ) above the surrounding landscape.
In the southwest it rises to the higher mountains of the Black Forest.
The site of the old town is about 250 m above the sea, while a very steep and almost isolated rock, crowned by a Saracen castle, rises about 150 m higher: this is undoubtedly the site of the ancient Arx or citadel, the inaccessible position of which is repeatedly alluded to by ancient writers.
One of these riddle canons, " in augmentationem " ( i. e. augmentation, the length of the notes gets longer ), is inscribed " Notulis crescentibus crescat Fortuna Regis " ( may the fortunes of the king increase like the length of the notes ), while a modulating canon which ends a tone higher than it starts is inscribed " Ascendenteque Modulatione ascendat Gloria Regis " ( as the modulation rises, so may the King's glory ).
As the temperature increases, the constants and change to reflect the empirical observation that the quantity adsorbed rises more slowly and higher pressures are required to saturate the surface.
Under these conditions when the air rises ( for instance, by convection ) it expands, because the pressure is lower at higher altitudes.
Subsequently, as the wealth of the individual rises, demand increases, shifting the demand curve higher at all rates of consumption.

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