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Sterno is a brand of jellied denatured alcohol sold in and meant to be burned directly in its can. Popular both in commercial food service and home entertainment, its primary uses are as a fuel for heating chafing dishes in buffets and serving fondue .
The common gel methanol or ethanol chafing fuel is contained in a steel can with a resealable plug lid in sizes based on burn times. Two-, four-, and six-hour burn times are the most common sizes of methanol and ethanol chafing fuels available. The colour of the fuel being used can also vary among manufacturers.
The first firm to successfully introduce cans was the Gottfried Krueger Brewing Company of Newark, New Jersey in 1935. [2] Since the 12-ounce cans were much smaller and lighter than glass bottles, they could more easily be packaged and transported. [2] However, bottlers soon started selling "one-way" bottles as well. [2]
Upon adding one US fluid ounce (30 ml) of water, this mixture can raise the temperature of a 8-ounce (230 g) meal packet by 100 °F (38 °C) in about 10 minutes, releasing approximately 50 kilojoules (47 BTU) of heat energy at about 80 watts. [6] The main disadvantage of the magnesium-based heaters is the production of hydrogen gas.
As with trioxane, hexamine has an almost unlimited shelf life if stored properly, in a sealed dry container. However, the heat given off cannot be easily adjusted, so water can be boiled, but cooking requiring simmering is more difficult. Tablets are a powerful stove fuel (30.0 MJ/kg), but are sensitive to wind and dampness.
For £4 you can buy 4 cans of sterno for a total of 22748 btu In england (like London) For £4 (about $6.53 today) you can buy 4 cans of sterno for a total of 5531 * 4 = 22,124 BTU; For £3 (about $4.90 today) you can buy 10 kg of wood pellets for a total of 167,195 BTU; That is 7.5 times more BTU for cheaper.
"Frost-Free" refrigerator/freezer units usually use a heating element to defrost their evaporators, a pan to collect and evaporate water from the frost that melts from the cold plate and/or evaporator coil, a timer which turns off the compressor and turns on the defrost element usually from once to 4 times a day for periods usually ranging from ...
That is, the temperature and the compositions of all phases are determined. Thus, in for example the chemical system H 2 O-NaCl, which has two components, the simultaneous presence of the three phases liquid, ice, and hydrohalite can exist only at atmospheric pressure at the unique temperature of –21.2 °C [citation needed].