An air motor is provided for converting electrical energy into kinetic energy, and using the kinetic energy to generate a specified air pressure and a specified airflow rate. The air motor comprises plural air motor units, each of which includes a main body and a piezoelectric actuator. The piezoelectric actuator is disposed within the main body. When the piezoelectric actuator is enabled, the air within the main body is controlled and driven to flow. The air motor can be used to replace various types of motors, compressors or engines.

An air motor is provided for converting electrical energy into kinetic energy, and using the kinetic energy to generate a specified air pressure and a specified airflow rate. The air motor comprises plural air motor units, each of which includes a main body and a piezoelectric actuator. The piezoelectric actuator is disposed within the main body. When the piezoelectric actuator is enabled, the air within the main body is controlled and driven to flow. The air motor can be used to replace various types of motors, compressors or engines.

Operation of a multistage compression system comprising at least one centrifugal compressor having a dry gas seal with opposed seal faces, for compressing a gas feed having a variable flow rate is improved by operating the or at least one centrifugal compressor in a low power mode where the opposed faces of the dry gas seal are not in contact during periods when gas flow through the centrifugal compressor(s) is not sufficient for normal operation. Such operation not only reduces damage to the dry gas seals and hence improves reliability, but also reduces the overall power requirement of the overall compression system.

An air quality system handled by artificial intelligence internet of things is provided and includes a gas detection device, an artificial intelligent internet of things handling device, and a user demand platform. In the system, the user demand platform transmits an instruction to the artificial intelligent internet of things handling device. By using self deep-learning analysis of data computing and algorithms of the AI device, second digital data is generated. The second digital data is fed back to the gas detection device through the network. Accordingly, the actuating actions of the micro pumps and the detecting actions of the sensors can be generated. Hence, the actuation and the detection of air quality can be achieved more effectively.

Disclosed techniques include working fluid exergy recovery using hybrid processing. A supply of working fluid at a first pressure and a first temperature is accessed. The working fluid is compressed. The compressing yields the working fluid at a second pressure. The second pressure is greater than the first pressure. The working fluid at the second pressure and a second temperature is warmed using a first heat exchanger. The second temperature is greater than the first temperature. The working fluid at the second temperature is in a gaseous state. The working fluid is expanded in a gaseous state to a third pressure. The expanding is accomplished using a first liquid piston expander. An engine is driven to recover work from the working fluid in a gaseous state. The engine is powered by liquid from the first liquid piston expander.

The present invention provides an energy-efficient method and apparatus that can achieve exhaust gas abatement with a minimum use of diluent nitrogen gas. More specifically, the present invention is directed to a method and apparatus for exhaust gas abatement under reduced pressure, in which an exhaust gas supplied from an exhaust gas source via a vacuum pump is decomposed by heat of a high-temperature plasma under a reduced pressure.

An air compressor includes a motor provided with a basic insulation, a first air compressing unit and a second air compressing unit that are driven by the motor, at least two tanks, and a discharge port. The at least two tanks are connected to the first air compressing unit and the second air compressing unit, store air compressed by the first air compressing unit and the second air compressing unit, and are connected to one another in series. The discharge port is disposed to a tank positioned on a most downstream of supplied compressed air and discharges the compressed air. The motor, the first air compressing unit and the second air compressing unit, and a tank on an upstream side with respect to the tank positioned on the most downstream are electrically insulated from the tank positioned on the most downstream and the discharge port.

A gas compressor includes inverters, a plurality of compressor units and a control device for controlling each of the inverters. The control device increases the number of compressor bodies to be operated after confirming that the rotational speed of the operational motors will reach a steady value immediately after causing the number of the compressor bodies to be operated to increase.

A gas compressor includes inverters, a plurality of compressor units and a control device for controlling each of the inverters. The control device increases the number of compressor bodies to be operated after confirming that the rotational speed of the operational motors will reach a steady value immediately after causing the number of the compressor bodies to be operated to increase.

A vapor recovery system comprises a vapor recovery unit, environmental tank, control system, vent line, environmental tank line, main vapor recovery unit inlet line, and a discharge line. The vapor recovery unit comprises a vapor recovery vessel and a vapor recovery compressor comprising a motor. The main vapor recovery unit inlet line is fluidly connected to the vapor recovery vessel. The vent line comprises a valve adapted to regulate packing case vapor flow through the vent line to the main vapor recovery unit inlet line. The environmental tank line is fluidly connected to the main vapor recovery unit inlet line. The control system is adapted to monitor a vapor recovery vessel input pressure and control the vapor recovery compressor. The control system is further adapted to control a vapor recovery vessel output to the discharge line.