Topic
Gas compressor
About: Gas compressor is a research topic. Over the lifetime, 91817 publications have been published within this topic receiving 552209 citations.
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Patent•
29 Dec 1975
TL;DR: In this paper, the malfunction indicator and reset control are disposed adjacent the thermostat for facilitated determination of the system operating condition, where clock pulses and R-C time delays are used to facilitate operation of the current sensing control.
Abstract: A control system for a central air conditioner. The air conditioner includes an outdoor condensing unit including a refrigerant compressor, an indoor evaporator unit, an indoor thermostat responsive to the indoor temperature for controlling the air conditioner, and a control system for protecting the air conditioner and indicating to the user certain malfunctions in the air conditioner should they occur. The malfunction indication may be by means of signal lights and a manually operable reset control is provided permitting the user to reset the control system. The malfunction indicator and reset control are disposed adjacent the thermostat for facilitated determination of the system operating condition. The control system includes an improved control position for starting of the compressor motor which is arranged to prevent operation of the system in the event of a low power supply voltage condition. The control system provides a minimum "Off" reset time before permitting the air conditioner to automatically attempt to restart regardless of the condition causing stopping of the air conditioner. The control system further includes a current sensing control which determines the compressor motor current a preselected time after the closing of the compressor motor switch and is arranged to discontinue operation of the compressor motor in the event the current is above a preselected high value. Clock pulses are used to facilitate operation of the current sensing control. Improved accuracy in the timing of the control system is obtained by means of coordinated use of clock pulses and R-C time delays.
130 citations
TL;DR: In this paper, a proton exchange membrane (PEM) fuel cell system model for automotive applications that includes an air compressor, cooling system, and other auxiliaries is described.
Abstract: This paper describes a proton exchange membrane (PEM) fuel cell system model for automotive applications that includes an air compressor, cooling system, and other auxiliaries. The fuel cell system model has been integrated into a vehicle performance simulator that determines fuel economy and allows consideration of control strategies. Significant fuel cell system efficiency improvements may be possible through control of the air compressor and other auxiliaries. Fuel cell system efficiency results are presented for two limiting air compressor cases: ideal control and no control. Extension of the present analysis to hybrid configurations consisting of a fuel cell system and battery is currently under study.
130 citations
Patent•
10 Mar 1988TL;DR: In this article, a gas turbine engine comprising a core gas generator engine for generating combustion gases, an additional power turbine, a fan section, and a booster compressor is described. But the work is limited to a single generator.
Abstract: A gas turbine engine comprising a core gas generator engine for generating combustion gases, an additional power turbine, an additional fan section, and a booster compressor is disclosed. The power turbine includes first and second counterrotatable turbine blade rows effective for rotating first and second drive shafts, respectively. The fan section includes a first fan blade row connected to the first drive shaft and a second fan blade row connected to the second drive shaft. The booster compressor includes a first compressor blade row connected to the first drive shaft and a second compressor blade row connected to the second drive shaft.
129 citations
TL;DR: In this paper, an analysis was conducted for a multi-type inverter air conditioner with a linear electronic valve as the expansion device and a variable speed compressor, and the system performance was analyzed with variations of operating frequency of the compressor, cooling load imposed on the system and cooling load fraction (i.e. load ratio) between rooms in which is installed an evaporator.
128 citations
TL;DR: In this article, the development of a 10 W, homogeneous charge compression ignition free-piston engine-compressor is presented, and a crankcase-scavenged, two-stroke engine performance estimation method is developed and used to explore the influence of engine operating conditions and geometric parameters on power density and establish plausible design conditions.
128 citations