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A pot-in-pot refrigerator, clay pot cooler [1] or zeer (Arabic: زير) is an evaporative cooling refrigeration device which does not use electricity. It uses a porous outer clay pot (lined with wet sand) containing an inner pot (which can be glazed to prevent penetration by the liquid) within which the food is placed. The evaporation of the ...
Any seeds that are indicated as needing a period of warm stratification followed by cold stratification should be subjected to the same measures, but the seeds should additionally be stratified in a warm area first, followed by the cold period in a refrigerator later. Warm stratification requires temperatures of 15–20 °C (59–68 °F).
In 1877, the french steamer Paraguay equipped with a Carré compression machine completed the first successful travel with its shipment of 5500 frozen muttons from Argentina arriving to France in excellent condition despite a collision that delayed the delivery for several months, thus proving the concept of refrigerated ships, if not the ...
A refrigerator with a crisper drawer at the bottom of its main compartment Open crisper drawers. A crisper drawer (also known as a crisper) is a compartment within a refrigerator designed to prolong the freshness of stored produce. Crisper drawers have a different level of humidity from the rest of the refrigerator, optimizing freshness in ...
The refrigerator mother theory, also known as Bettelheim's theory of autism, is a largely abandoned psychological fringe theory that the cause of autism is a lack of parental, and in particular, maternal emotional warmth.
Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [1]
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 ...
In areas that are cold at night or in winter, heat storage is used. Heat may be stored in earth or masonry; air is drawn past the masonry to heat or cool it. [13] In areas that are below freezing at night in winter, snow and ice can be collected and stored in ice houses for later use in cooling. [13]
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