The invention relates to refrigeration technology and can be used in air conditioning systems, refrigerators, etc. An air turbo-refrigeration unit comprises a compressor disposed on the same shaft as a turbo-expander, an electric motor, a two-cavity heat exchanger, a recuperator, a water trap, and a refrigeration chamber with a cooler and a fan. The unit Is equipped with a two-cavity heat exchanger/cooler, and with a second water trap and a third water trap; the compressor is connected by its outlet to the first cavity of the heat exchanger, which is connected to the first cavity of the heat exchanger/cooler, and the first cavity of the heat exchanger/cooler is connected via the second water trap to the first cavity of the recuperator, which communicates with the inlet of the turbo-expander via the first water trap; the turbo-expander is connected by its outlet via the third water trap to the second cavity of the heat exchange r/cooler, which is communicated with the cooler and is communicated via the cooler with the second cavity of the recuperator, which is communicated with the compressor inlet. The invention makes it possible to prevent the formation of ice and frost on the inner cavities of the turbo-expander and of ducts, which, in turn, prevents shut-off of the air turbo-refrigeration unit and increases the refrigeration capacity of the unit.

The invention relates to refrigeration technology and can be used in air conditioning systems, refrigerators, etc. An air turbo-refrigeration unit comprises a compressor disposed on the same shaft as a turbo-expander, an electric motor, a two-cavity heat exchanger, a recuperator, a water trap, and a refrigeration chamber with a cooler and a fan. The unit Is equipped with a two-cavity heat exchanger/cooler, and with a second water trap and a third water trap; the compressor is connected by its outlet to the first cavity of the heat exchanger, which is connected to the first cavity of the heat exchanger/cooler, and the first cavity of the heat exchanger/cooler is connected via the second water trap to the first cavity of the recuperator, which communicates with the inlet of the turbo-expander via the first water trap; the turbo-expander is connected by its outlet via the third water trap to the second cavity of the heat exchange r/cooler, which is communicated with the cooler and is communicated via the cooler with the second cavity of the recuperator, which is communicated with the compressor inlet. The invention makes it possible to prevent the formation of ice and frost on the inner cavities of the turbo-expander and of ducts, which, in turn, prevents shut-off of the air turbo-refrigeration unit and increases the refrigeration capacity of the unit.

This invention aims to dramatically reduce the use of electricity in refrigeration equipment by reusing the energy, otherwise rejected, in conventional refrigeration units. This enhancement compression refrigeration cycle would revolutionize the refrigeration industry and would be conducive to a lesser carbon footprint impact on global warming. It consists of 3-fluid Loops that would maximize the use of the heat from conditioned or refrigerated room that gets expelled into the environment by conventional refrigeration units, thereby channeling this energy to improve the efficiency of refrigeration/air conditioning machinery by utilizing expelled energy that would otherwise be wasted.

This invention aims to dramatically reduce the use of electricity in refrigeration equipment by reusing the energy, otherwise rejected, in conventional refrigeration units. This enhancement compression refrigeration cycle would revolutionize the refrigeration industry and would be conducive to a lesser carbon footprint impact on global warming. It consists of 3-fluid Loops that would maximize the use of the heat from conditioned or refrigerated room that gets expelled into the environment by conventional refrigeration units, thereby channeling this energy to improve the efficiency of refrigeration/air conditioning machinery by utilizing expelled energy that would otherwise be wasted.

A cooling system includes a heat exchanger configured to transfer thermal energy from a heat source to an internal fluid, an expander fluidly coupled with the heat exchanger and configured to reduce a pressure of the internal fluid received from the heat exchanger, a first air-cooled condenser fluidly coupled with the expander and configured to air cool the internal fluid that is received from the expander, a compressor fluidly coupled with the first air-cooled condenser and configured to increase the pressure of the internal fluid received from the first air-cooled condenser, and a second air-cooled condenser fluidly coupled with the compressor and configured to air cool the internal fluid received from the compressor.

A cooling system includes a heat exchanger configured to transfer thermal energy from a heat source to an internal fluid, an expander fluidly coupled with the heat exchanger and configured to reduce a pressure of the internal fluid received from the heat exchanger, a first air-cooled condenser fluidly coupled with the expander and configured to air cool the internal fluid that is received from the expander, a compressor fluidly coupled with the first air-cooled condenser and configured to increase the pressure of the internal fluid received from the first air-cooled condenser, and a second air-cooled condenser fluidly coupled with the compressor and configured to air cool the internal fluid received from the compressor.

A turbo economizer adapted to be used in a chiller system includes a nozzle, a turbine, and an economizer impeller. The nozzle introduces refrigerant into the turbo economizer. The turbine is disposed downstream of the nozzle, and the turbine is attached to a shaft rotatable about a rotation axis. A flow of the refrigerant introduced through the nozzle drives the turbine to rotate the shaft. The economizer impeller is attached to the shaft so as to be rotated in accordance with rotation of the shaft. In the turbo economizer, the nozzle reduces a pressure of the refrigerant such that a pressure of the refrigerant entering the turbo economizer is lower than a predetermined pressure, at least some of the refrigerant passes through the nozzle is introduced into the economizer impeller, and the economizer impeller increases a pressure of the refrigerant introduced thereinto to the predetermined pressure.

A turbo economizer adapted to be used in a chiller system includes a nozzle, a turbine, and an economizer impeller. The nozzle introduces refrigerant into the turbo economizer. The turbine is disposed downstream of the nozzle, and the turbine is attached to a shaft rotatable about a rotation axis. A flow of the refrigerant introduced through the nozzle drives the turbine to rotate the shaft. The economizer impeller is attached to the shaft so as to be rotated in accordance with rotation of the shaft. In the turbo economizer, the nozzle reduces a pressure of the refrigerant such that a pressure of the refrigerant entering the turbo economizer is lower than a predetermined pressure, at least some of the refrigerant passes through the nozzle is introduced into the economizer impeller, and the economizer impeller increases a pressure of the refrigerant introduced thereinto to the predetermined pressure.

A centrifugal compressor for HVAC application includes a rotary component rotatable about an axis, a static component, and a brush seal fixed to one of the static component and the rotary component. The brush seal includes bristles that contact the other of the static component and the rotary component.

A centrifugal compressor for HVAC application includes a rotary component rotatable about an axis, a static component, and a brush seal fixed to one of the static component and the rotary component. The brush seal includes bristles that contact the other of the static component and the rotary component.