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An air mattress, also known as an airbed or a blow-up bed, [2] is an inflatable mattress made of polyvinyl chloride (PVC) or textile-reinforced urethane plastic or rubber. The deflated mattress can be compacted and carried or stored in a small form. They are inflated by blowing into a valve, either with a manual or an electric pump. Some are ...
For example, a conventional heat pump system used to heat a building in Montana's −57 °C (−70 °F) low temperature or cool a building in the highest temperature ever recorded in the US—57 °C (134 °F) in Death Valley, California, in 1913 would require a large amount of energy due to the extreme difference between inside and outside air ...
In mild weather, coefficient of performance (COP) may be between 2 and 5, while at temperatures below around −8 °C (18 °F) an air-source heat pump may still achieve a COP of 1 to 4. [5] While older air-source heat pumps performed relatively poorly at low temperatures and were better suited for warm climates, newer models with variable-speed ...
[5] MF induction generators work from 1 kHz to 10 kHz. The output range typically incorporates 50 kW to 500 kW. Induction heaters within these ranges are used on medium to larger components and applications such as the induction forging of a shaft. [1] Mains (or supply) frequency induction coils are driven directly from the standard AC supply.
Aerovel Corporation was founded in 2006 by Dr. Tad McGeer, a designer of unmanned aerial systems (UAS) at various companies for more than 25 years. [1] McGeer co-founded The Insitu Group in 1992, where he was the architect of Aerosonde, SeaScan and ScanEagle. Aerovel Flexrotor is the next evolution in McGeer's line of unmanned aerial systems. [2]
A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.