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Solar, special Einstein refrigerators and thermal mass refrigerators reduce the amount of electricity required. Also, solar and special Einstein refrigerators do not use haloalkanes (which play a key role in ozone depletion), but use heat pumps or mirrors instead. Solar refrigerators have been built for developing nations by Sopology. [41] [42]
R-410A was invented and patented by Allied Signal (now Honeywell) in 1991. [5] Other producers around the world have been licensed to manufacture and sell R-410A. [6] R-410A was successfully commercialized in the air conditioning segment by a combined effort of Carrier Corporation, Emerson Climate Technologies, Inc., Copeland Scroll Compressors (a division of Emerson Electric Company), and ...
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.
A power inverter, inverter, or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). [1] The resulting AC frequency obtained depends on the particular device employed. Inverters do the opposite of rectifiers which were originally large electromechanical devices converting AC to DC. [2]
In the year ended 31 March 2012, Toshiba had total revenues of ¥6,100.3 billion, of which 25.2 percent was generated by the Digital Products Group, 24.5 percent by the Electronic Devices Group, 8.7 percent by the Home Appliances Group, 36.6 percent by the Social Infrastructure Group and 5 percent by other activities. In the same year, 45 ...
GoldStar television (VD-191), manufactured in 1966 LG Micro Hi-Fi Audio system, c. 2008. In 1958, LG Electronics was founded as GoldStar (Korean: 금성).It was established in the aftermath of the Korean War to provide the rebuilding nation with domestically produced consumer electronics and home appliances.
The typical efficiency of TEGs is around 5–8%, although it can be higher. Older devices used bimetallic junctions and were bulky. More recent devices use highly doped semiconductors made from bismuth telluride (Bi 2 Te 3), lead telluride (PbTe), [10] calcium manganese oxide (Ca 2 Mn 3 O 8), [11] [12] or combinations thereof, [13] depending on application temperature.
The Philippines could be considered one of the world leaders in renewable energy, with 25 percent of its power generation being powered by the renewable energy sector. [32] The Philippines is the world's second largest generator of geothermal energy and was the first Southeast Asian nation to invest in large-scale solar and wind technologies. [31]