A green community system centered around a transfer line compressed air energy storage system (TL-CAES). The TL-CAES system can supply compressed air to distant locations, and can be feed into companders to produce super-chilled air which can be used to improve the efficiency of natural gas generator sets. The generator sets can provide facilities with electricity and the super-chilled air can provide the facilities with heating, ventilation, and air-conditioning systems. The compressed air in the TL-CAES system is to be provided by a transportable compressed air storage system (T-CAES). Air compressors driven powered by green energy sources provide compressed air for the T-CAES system. The compressed air supply in conjunction with companders can further systems such as water purification and carbon dioxide extraction.

The invention relates to a compressor comprising a plurality of compression stages for compressing gas; and two or more compressed gas heat exchangers for cooling compressed gas. Each of the two or more heat exchangers comprises a primary part for transferring the compressed gas through the heat exchanger; and one or more secondary parts for transferring coolant through the heat exchanger for recovering heat from the compressed gas. The compressor further comprises liquid to liquid heat exchangers for cooling of internal components of the compressor. A coolant circuitry conducts the coolant via the liquid to liquid heat exchanger and the two or more compressed gas heat exchangers; and a gas flow circuitry conducts gas via the compression stages and the compressed gas heat exchangers. The coolant circuitry is at least partly coupled in series so that the liquid to liquid heat exchanger is the first or the second in the series connection and at least two compressed gas heat exchangers are in series connection.

The present disclosure provides an oil injected air compressor and a method for controlling the same, a storage medium, and an electronic device. The oil injected air compressor includes a compressor assembly, an oil separator tank, an oil cooler assembly, an after cooler assembly, and a controller. The oil cooler assembly is connected to the compressor assembly and the oil separator tank, and is configured to cool the oil. The after cooler assembly is connected to the oil separator tank, and is configured to cool compressed air separated from the oil separator tank. The controller is configued to control, based on a state switching signal, the oil cooler assembly to operate in an energy-saving state, and the after cooler assembly to operate in a shutdown state or in a minimum speed state.

A compressor driving motor includes: a rotor; a stator surrounding an outer peripheral part of the rotor; a case accommodating the rotor and the stator; a liquid introduction portion introducing a liquid refrigerant from a refrigerant circuit including the compressor into the case; a gas introduction portion introducing a gas refrigerant from the refrigerant circuit into the case; and an injector using, as driving fluid, the gas refrigerant introduced by the gas introduction portion, and using, as suction fluid, the liquid refrigerant introduced by the liquid introduction portion. Wet steam of a mixture of the liquid refrigerant and the gas refrigerant mixed by the injector is injected toward at least a gap between the outer peripheral part of the rotor and an inner peripheral part of the stator.

The present disclosure provides a compressor system operable for compressing a working fluid such as air. A conditioner is positioned upstream of the compressor to reduce the humidity and in some embodiments may control a temperature of the working fluid entering the compressor. A working fluid aftercooler and a lubricant cooler is positioned downstream of the compressor. A first heat exchange system directs water from a source through the conditioner and then to the aftercooler and oil cooler in parallel. A second heat exchange system directs oil from the compressor to the oil cooler and then to a regenerator prior to reentry into the compressor. A control system with one or more control valves is configured to provide oil to the compressor at a target temperature defined to ensure that the temperature of the discharged compressor is above a pressure dew point temperature.

Oil-injected compressor device (1) provided with at least one oil-injected compressor element (2) with an inlet (5) for gas to be compressed and an outlet (7) for compressed gas, whereby the outlet (7) is connected to an oil separator (9), whereby the oil-injected compressor device (1) is further provided with an oil injection pipe (14) leading from the oil separator (9) to the oil-injected compressor element (2), whereby an oil cooler (15) is incorporated into the oil injection pipe (15), characterized in that a storage (17) for oil is provided in the oil injection pipe (14) downstream of an inlet (16) of the oil cooler (15).

Compressor installation with a liquid-injected compressor device with a compressor element with an outlet pipe connected to an outlet of the compressor element, with a liquid separator in the outlet pipe which includes an inlet and an outlet for compressed gas and an outlet for separated liquid and with a dryer connected to the outlet pipe which uses a desiccant for drying compressed gas of the compressor device. The dryer is provided with a drying section and a regeneration section with an entry and an exit for regeneration gas. A regeneration pipe is connected to the entry and a heat exchanger is provided in the regeneration pipe with a primary section through which the regeneration gas is guided. A secondary section of the heat exchanger is mounted in the compressor device. The compressor installation is provided with means to regulate the amount of liquid injected in the compressor element.

A system for the recovery of waste heat energy contained in oil in an oil-cooled air compressor, characterised in that the outlet of the oil side of the oil separator (4) is connected to the inlet of the oil side of the heat exchanger (9), and the outlet of the oil side of the heat exchanger is connected to the oil flow divider (10). A method for the recovery of waste heat energy contained in oil in oil-cooled air compressors consists in diverting the receiving medium flow away from the heat exchanger (9) by means of a control device (12), or stopping the receiving medium flow when at least the temperature of the oil returning to the compressor main body (2) is lower than the setpoint or the temperature of the oil entering the heat exchanger (9) is lower than the temperature of the receiving medium.

A reciprocating compressor of the disclosure includes a cylinder, a piston, a space for compressing gas, a discharge port for discharging the compressed gas from the space, a discharge valve, and a supplying port for supplying liquid that is different in kind from the gas. The cylinder has an axis extending in a direction of gravity. The piston is disposed to be reciprocable along the axis inside the cylinder. The space is constituted above the piston by being surrounded by the piston and an inner peripheral surface of the cylinder. The inner peripheral surface of the cylinder includes a straight portion and a throttle portion. The throttle portion is constituted such that an inner diameter of the cylinder decreases toward the discharge valve.

A method for controlling a first reference temperature in a device (1) for compressing gas, the device (1) including an oil-injected element (2) for compressing the gas; an oil injection pipe network (6) for injecting oil into the oil-injected element (2), including: an apportioning means (8) for apportioning the oil into a first part and into a second part; an oil cooler (10) cooled by a fan (9), for cooling the first part; and a bypass (11) for diverting the second part past the oil cooler (10). An apportioning proportion of the first part is controlled to a required apportioning proportion, and subsequently a speed of the fan (9) is controlled to a required speed optionally on the basis of the apportioning proportion, wherein the apportioning proportion is controlled by a control unit (15) on the basis of a non-fuzzy logic algorithm.