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Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [ 2][ 3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [ 4] Heat pumps are similar in many ways to air conditioners ...
Correcting concentrations for altitude. Air pollutant concentrations expressed as mass per unit volume of atmospheric air (e.g., mg/m 3, μg/m 3, etc.) at sea level will decrease with increasing altitude. The concentration decrease is directly proportional to the pressure decrease with increasing altitude.
An axial compressor is a gas compressor that can continuously pressurize gases. It is a rotating, airfoil -based compressor in which the gas or working fluid principally flows parallel to the axis of rotation, or axially. This differs from other rotating compressors such as centrifugal compressor, axi-centrifugal compressors and mixed-flow ...
Wall Street pointed sharply higher Wednesday as anxiety about a softening U.S. economy took a back seat to another trove of mostly strong corporate earnings reports. Japanese markets also clawed ...
It has been suggested that Germany deliberately placed an unrealistically high initial order to secure the company headquarters and initial test flight in Germany rather than the UK, to have a bigger design influence. [18] Formation take-off of an RAF Tornado GR.1 and a Tornado F.2 prototype in September 1982
A refrigeration system utilizes a compressor, a turboexpander and an electric motor. Depending on the operating conditions, the turboexpander reduces the load on the electric motor by 6–15% compared to a conventional vapor-compression refrigeration system that uses a throttling expansion valve rather than a turboexpander. [12]
The 737 MAX 9 mockup at the 2012 ILA Berlin. Faced with the record orders for Airbus and the defection of a long-time customer, on August 30, 2011, Boeing's board of directors approved the launch of the re-engined 737, which they said would meet or exceed the range of the Airbus A320neo [24] while burning 4% less fuel. [25]
DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...