air-cycle air conditioning
61art conservation and restoration — Maintenance and preservation of works of art, their protection from future damage, deterioration, or neglect, and the repair or renovation of works that have deteriorated or been damaged. Research in art history has relied heavily on 20th and… …
62heating — I Process of raising the temperature of an enclosed space. Heat can be delivered by convection, radiation, and thermal conduction. With the exception of the ancient Romans, who developed a form of central heating, most cultures relied on direct… …
63Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
64Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… …
65Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
66Geothermal heat pump — A geothermal heat pump system is a heating and/or an air conditioning system that uses the Earth s ability to store heat in the ground and water thermal masses. These systems operate based on the stability of underground temperatures: the ground… …
67Heat engine — Thermodynamics …
68Refrigerator — Fridge and Freezer redirect here. For other uses, see Fridge (disambiguation) and Freezer (disambiguation). For other uses, see Refrigerator (disambiguation). See also: Refrigeration A side by side refrigerator …
69Glossary of environmental science — This is a glossary of environmental science.Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and… …
70R&D Dynamics — was founded in 1990. The company’s founder Dr. Giri Agrawal pioneered the design and development of high speed rotating machines supported on air/gas foil bearings for the Air cycle machine in the 70’s and 80’s while working at Honeywell and… …
