The first method of refrigeration used was to pack the desired item to be kept cold, in snow, ice, cool streams, springs, caves and cellars. Thousands of years ago, cellars were holes dug into the ground and lined with wood or straw and packed with snow and ice. Meat and fish were preserved by salting or smoking. In 1, 000 BC the Chinese cut and stores ice, and around 500 BC the Egyptians and Indians made ice on cold nights by setting water out in earthenware pots and keeping the pots wet. In 18 th century England, servants collected ice in the winter and put it into icehouses, where sheets if ice were packed in salt, wrapped in strips of flannel and stored underground to keep them frozen until summer. But then when the 19 th century his, England started using ice boxes.
The first known artificial refrigeration system was demonstrated by William Cullen at the University of Glasgow in 1748. In 1805, an American inventor Oliver Evans designed the first refrigeration machine. The first practical refrigerating machine was built by Jacob Perkins in 1834. Carl von Linden, did not patent the refrigerator, but the process of liquefying gas in 1876 that is the basic technology of refrigeration technology. Warm winters in 1889 and 1890 created a shortage of natural ice in the US. This stimulated the use of mechanical refrigeration for the freezing and storing of fish, brewing, dairy and meat packing industries.
Two of the first refrigerators appeared in Fort Wayne, Indiana, where in 1911, GE (General Electric) company unveiled a unit invented by a French monk. They were assembled in a washhouse in a Fort Wayne backyard. In 1918 Kelvin ator introduced the first fridge with any type of automatic control. A 1922 model had a wooden cabinet, a water cooler compressor, two ice cube trays and nine cubic feet of storage space. It cost $714. Steel and porcelain cabinets began appearing in the mid-20’s.
The Term Paper on Swot: Ice Cream and Jerry
1.0 Introduction Ben & Jerry’s Ice Cream, founded in 1978 by two upstarts; Ben Cohen and Jerry Greenfield, is now one of the best homemade well known as a premium ice cream brands. It was firstly started in Burlington, Vermont which has a longer winter season as compared to summer season. It seemed as the worst idea ever to start an ice cream business in such a cold place. However, Ben and ...
Unfortunately, several fatal accidents occurred in the 1920’s when methyl chloride (the coolant in the fridge) leaked out. Mass production of the modern fridge did not start until after World War II. In the 1940’s frozen food storage became widely used by customers. Innovations like automatic defrost and automatic ice makers first appeared in the 1950’s and 60’s.
Today the refrigerator is America’s most used appliance, found in more than 99. 5% of American homes. Because of new technology in fridges, like a television built right in, and ice cube dispensers, they can cost a lot more that a normal fridge without those luxuries. The price range of a refrigerator can range from about $600 to a few thousand dollars. web > web > web > web.
