A pump assembly and method of cooling process air generated by the pump. The assembly includes a pump and a motor coupled by a gear arrangement. The pump has a cooling air intake and a cooling air exhaust and a process air intake and a process air discharge. The assembly also includes a heat exchanger having a process air inlet and a process air outlet. The assembly includes isolated first and second regions such that within the first region the cooling air exhaust of the pump is positioned at a first stage of tubing within the heat exchanger and further such that within the second region the cooling air intake of the pump is positioned at a second stage of tubing within the heat exchanger.

An internally-cooled compressor is provided including a casing and a diaphragm disposed in the casing. The diaphragm includes a diaphragm box defining a plurality of box channels and a bulb defining a plurality of bulb channels. A plurality of return channel vanes connect the diaphragm box and bulb in fluid communication, such that each return channel vane defines a plurality of return vane conduits coupled in fluid communication with the plurality of box channels and the plurality of bulb channels thereby forming a section of a cooling pathway. The cooling pathway is configured such that a cooling agent introduced from an external coolant source into the diaphragm box and flowing through a box channel flows through a return vane conduit into and through a bulb channel and back through another return vane conduit into another box channel before flowing back to the external coolant source.

A boosting system which boosts a target gas to a pressure which is equal to or greater than a target pressure higher than a critical pressure includes a compression portion which compresses the target gas to an intermediate pressure which is equal to or greater than the critical pressure and is less than the target pressure to generate an intermediate supercritical fluid, a cooling portion which cools the intermediate supercritical fluid generated by the compression portion to a temperature near to a critical temperature to generate an intermediate supercritical pressure liquid, a pump portion which boosts the intermediate supercritical pressure liquid generated by the cooling portion to a pressure which is equal to or greater than the target pressure, and a cooling temperature adjusting portion which adjusts a temperature of the intermediate supercritical pressure liquid generated by the cooling portion in an upstream side of a pump.

A centrifugal compressor includes a rotor including: a shaft that extends along an axis and an impeller that is fixed to an outer surface of the shaft and feeds a fluid that flows into a first side in an axial direction to an outer side in a radial direction of the axis under pressure; a diaphragm that surrounds the impeller from an outer circumference side; a first casing head disposed at a second side of the diaphragm in the axial direction at an interval; a seal device disposed between the first casing head and the shaft; and a bearing device disposed at the second side in the axial direction with respect to the seal device and disposed between the first casing head and the shaft.

A gas turbine engine includes a main compressor section and a turbine section. The turbine section has a first turbine blade and vane and a downstream turbine component. A tap is configured to tap air from the compressor section at a location upstream of a most downstream location. The tap is connected to a heat exchanger. The heat exchanger is connected to a cooling compressor. The cooling compressor is connected to the downstream turbine component. A second tap is configured to tap air from a location in the main compressor section. The second tap is connected through a check valve to a line leading to the downstream turbine component. A control operates the cooling compressor such that when the cooling compressor is operating, air downstream of the cooling compressor is at a pressure higher than the pressure of the second tap, and the control is operational to selectively drive the cooling compressor at high power operation of an associated gas turbine engine, and to stop operation of the cooling compressor at lower power operations, such that air is delivered through the cooling compressor to the downstream turbine component at the high power operations, and air is delivered from the second tap at least some time when the cooling compressor is not operational. A method is also disclosed.

A method of controlling a ceiling type air conditioner including a panel, a first vane group, and a second vane group, and each of the first and second vane groups including an upper discharge vane and a lower discharge vane includes performing first mixing operation in which the first vane group guides air in a direction close to the ceiling surface to form horizontal airflow and the second vane group guides air in a direction close to a floor surface to form vertical airflow, determining whether swing operation of continuously rotating the first vane group and the second vane group or fixing operation in which the first vane group and the second vane group are located at the same angle is performed, and performing second mixing operation in which the first vane group forms the vertical airflow and the second vane group forms the horizontal airflow.

A gas turbine engine comprises a main compressor section having a high pressure compressor with a downstream most end, and more upstream locations. A turbine section has a high pressure turbine. A first tap taps air from at least one of the more upstream locations in the main compressor section, passing the tapped air through a first heat exchanger and then to a cooling compressor. A second tap taps air from a location closer to the downstream most end than the location of the first tap, and the first and second taps mix together and are delivered into the high pressure turbine. The cooling compressor is positioned downstream of the first heat exchanger, and upstream of a location where air from the first and second taps mix together.

A pump assembly and method of cooling process air generated by the pump. The assembly includes a pump and a motor coupled by a gear arrangement. The pump has a cooling air intake and a cooling air exhaust and a process air intake and a process air discharge. The assembly also includes a heat exchanger having a process air inlet and a process air outlet. The assembly includes isolated first and second regions such that within the first region the cooling air exhaust of the pump is positioned at a first stage of tubing within the heat exchanger and further such that within the second region the cooling air intake of the pump is positioned at a second stage of tubing within the heat exchanger.

A blowing device includes an axil fan having a plurality of blades and causing an air to flow through the blowing device, and a fan shroud rotatably supporting the fan. The fan shroud includes a ring portion surrounding a circumference of the fan, and an air guide portion connecting an outer rim of the fan shroud and an inner rim of the ring portion. The fan shroud includes a specific rim portion that is a part of the outer rim of the fan shroud, a distance from the specific rim portion to the inner rim of the ring portion being shorter than other parts of the outer rim. The fan shroud includes a counter flow introduction passage provided in the air guide portion and extending from a position located inward of the specific rim portion. The blowing device is capable of limiting a rotation noise of the fan.

A compressor device with at least two compressor elements connected in series and at least two coolers of which there at least two split coolers that are split in separate successive stages, respectively a hot stage and a cold stage, that are connected together in one or more separate cooling circuits such that the compressed gas is cooled sufficiently between the compressor elements with a minimum coolant flow rate to keep the temperature of the cooled gas at the outlet of each cooler below a maximum permissible value and thereby to realize a desired temperature increase of the coolant in at least one of the aforementioned cooling circuits.