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Air cycle machines were first developed in the 19th century for providing chilling on ships. The technique is a reverse Brayton cycle (the thermodynamic cycle of a gas turbine engine) and is also known as a Bell Coleman cycle or "Air-Standard Refrigeration Cycle".
The Barber–Colman Company was a manufacturer of textile and milling machinery from its founding in 1894 until the 1980s. Howard Colman organized the company in Rockford, Illinois, with capital from W. A. Barber.
The illustration is the interior of a common two wire heat-only household thermostat, used to regulate a gas-fired heater via an electric gas valve. Similar mechanisms may also be used to control oil furnaces, boilers, boiler zone valves , electric attic fans, electric furnaces, electric baseboard heaters, and household appliances such as ...
The study compared a standard ("reactive") smart thermostat and the multiple sensor system to a manual thermostat. The study concluded that a reactive smart thermostat with just on sensor saves, on average, 6.8% of energy consumption, while the multiple sensor system saved an average of 28% of energy consumption.
The lower the Mach number is to start with (i.e. small ), the greater the maximum angle through which the flow can turn. The streamline which separates the final flow direction and the wall is known as a slipstream (shown as the dashed line in the figure).