To obtain a vacuum pump which appropriately performs temperature management of a gas flow path and reduces restrictions on a gas flow rate attributable to the temperature management. A cooling tube performs temperature adjustment of a gas flow path. A first temperature sensor is arranged at a position closer to the gas flow path than the cooling tube, a second temperature sensor is arranged at a position closer to the cooling tube than the gas flow path, and a control apparatus controls, based on a sensor signal of the first temperature sensor and a sensor signal of the second temperature sensor, (an on-off valve of) the cooling tube so that a temperature of the gas flow path approaches a predetermined gas flow path target temperature.

A method for pressure and temperature control of fluid in a series of cryogenic compressors. An actual speed for each compressor and an actual inlet pressure and actual inlet temperature at entry are determined. The maximum speed for each compressor and a desired inlet pressure for the first compressor is provided. A speed index for each compressor is determined from the maximum speed and actual speed of each compressor. A proportional value is determined from the deviation of the actual and desired inlet pressure. A priority value is determined from the smaller of the proportional value and the smallest speed index. A desired inlet temperature for the first compressor and a desired speed for each compressor are determined from the priority value. The actual inlet temperature is adjusted to the determined desired inlet temperature and the actual speed for each compressor is adjusted to the determined desired speed.

An oil-feed-type air compressor includes a compressor main body driven by an electric motor, a separator that separates the oil from compressed air delivered from the compressor main body, an oil supply system that supplies the oil separated by the separator to working chambers of the compressor main body, an oil cooler that is disposed in the oil supply system and cools the oil by using cooling air generated by a cooling fan, and a controller. The controller stops the electric motor and the cooling fan when the continuation time of no-load operation has reached a predetermined value. Further, the controller predicts the return timing at which the electric motor is restarted, on the basis of a sensing history of the delivery-side pressure sensor, and predicts the delivery-side temperature of the compressor main body at the return timing.

A vacuum pump that allows for timely inspection and replacement of a temperature adjustment means, prevents unexpected stopping, and limits the maintenance cost, and a controller that controls the vacuum pump are proposed. The present disclosure relates to a vacuum pump for exhausting gas from an apparatus, such as manufacturing equipment, subjected to exhaustion. The vacuum pump includes: a temperature adjustment means for causing a predetermined area of the vacuum pump to have a predetermined temperature; an output control means configured to operate the temperature adjustment means; and an information output means configured to output information regarding ON/OFF of the temperature adjustment means obtained from the output control means.

Embodiments of the present disclosure include methods, systems and program products for controlling a wet compression system. Methods according to the present disclosure can include: calculating a water droplet size at a nozzle of a nozzle grid of the WCS based on at least one condition from a set of WCS operating fluid conditions; calculating at least one GT system performance parameter based on the water droplet size and at least one distinct condition from the set of WCS operating fluid conditions; determining a target water flow rate based on the at least one GT system performance parameter and another distinct condition from the set of WCS operating fluid conditions; and adjusting a flow rate of a water flow to the nozzle based on the target water flow rate.

Provided is a vacuum pump that prevents the solidification of gas while being operated properly. The vacuum pump includes a rotor that is supported rotatably on a base, a stator that has a thread groove portion, and a heating structure that heats the stator. The heating structure has a spacer that insulates the stator from stator components other than the stator, and a cartridge heater that heats the stator. The distance between a rotor cylindrical portion and the stator at the inlet port side is set to be equal to or greater than the distance between the rotor cylindrical portion and the stator at the outlet port side.

A centrifugal fan including first blades and second blades disposed at both sides of a main plate, respectively, and a first convex part and a second convex part formed at a fan housing to correspond to the first blades and the second blades, respectively, wherein an airflow generated by the first blades and an airflow generated by the second blades are guided to be divided into the first convex part and the second convex part, respectively.

Embodiments of the present disclosure include methods, systems and program products for controlling a wet compression system. Methods according to the present disclosure can include: calculating a water droplet size at a nozzle of a nozzle grid of the WCS based on at least one condition from a set of WCS operating fluid conditions; calculating at least one GT system performance parameter based on the water droplet size and at least one distinct condition from the set of WCS operating fluid conditions; determining a target water flow rate based on the at least one GT system performance parameter and another distinct condition from the set of WCS operating fluid conditions; and adjusting a flow rate of a water flow to the nozzle based on the target water flow rate.

The present invention relates to a fan with a cold air function which, through supply of liquid oxygen (LOX), has a strong cold air function and at the same time provides an air cleaning effect by supplying oxygen. A fan including a base part (10) equipped with a plurality of buttons (11), a main body part (20) installed on the top of the base part (10), a motor part (30), rotary blades (40) coupled to a motor shaft at the front of the motor part (30), and a protection net (50) installed to surround the rotor blades (40), the fan comprises: a mounting part (60) in which a liquid oxygen (LOX) charge canister (62) is removably mounted; an opening and closing controller (63) for controlling the output amount of an oxygen gas discharged from the charge canister (62) mounted in the mounting part (60); and a discharge pipe (64) which is connected to the opening and closing controller (63) and configured in such a manner that the discharged oxygen gas is diffused through the rotary blades (40) to the front.

A vacuum pump and a control device, on a pump side, performs heater control of a pipe to suppress precipitation of a deposit from a process gas and cooling control of a deposit trap to remove the deposit, and perform heater control and cooling control the process gas situation. A temperature sensor is disposed on an outer periphery or an inner periphery of an introduction pipe 3H, outputs temperature information a control device. Temperature information from the inside of a deposit trap is also sent to control device. The control device, performs ON/OFF control a heater such that a temperature of the introduction pipe 3H has a predetermined temperature value, based on the input temperature information 31. The control device, performs opening/closing control on a valve such that an internal temperature of the deposit trap has a predetermined cooling temperature value, based on the input temperature information.