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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 original "refrigerator" was a household appliance that kept food cold using blocks of ice; now called the "icebox", these cabinets became popular in the 1800s and early 1900s. The first modern electrical refrigerator to see widespread use was the General Electric "Monitor-Top" refrigerator, introduced in 1927, and refrigerators became ...
However, you can still achieve a similar result with a regular pack of zip-top freezer bags. To push out any extra air, place your food in the bag and close it nearly all the way, leaving a small ...
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.
"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 ...
The use of gas eliminated the need for an electric compressor motor and decreased the size of the refrigerator. However, electric companies that were customers of GE did not benefit from a gas-powered unit. Thus, GE invested in developing an electric model. In 1927, GE released the Monitor Top, the first refrigerator to run on electricity. [35]
Common absorption refrigerators use a refrigerant with a very low boiling point (less than −18 °C (0 °F)) just like compressor refrigerators.Compression refrigerators typically use an HCFC or HFC, while absorption refrigerators typically use ammonia or water and need at least a second fluid able to absorb the coolant, the absorbent, respectively water (for ammonia) or brine (for water).