Abstract: A jet pump apparatus for mixing a higher pressure gas and a lower pressure gas, includes an inlet section, an outlet section, a diffuser section and a mixing section. Inlet section includes a higher pressure inlet and a lower pressure inlet. Mixing section includes a plurality of separated mixing chambers. The diffuser section includes diffusers for receiving mixed gases from the mixing chambers. The outlet section receives mixed gases from the diffuser section and conveys those gases to an outlet. The inlet section includes a higher pressure inlet which receives higher pressure gas, and a lower pressure gas inlet which receives lower pressure gas. Each of the mixing chambers has a primary nozzle for introducing primarily higher pressure gas from to a respective mixing chamber, and a secondary inlet for introducing primarily lower pressure gas to each of the mixing chambers.

Abstract: A jet pump apparatus for mixing a higher pressure gas and a lower pressure gas, includes an inlet section, an outlet section, a diffuser section and a mixing section. Inlet section includes a higher pressure inlet and a lower pressure inlet. Mixing section includes a plurality of separated mixing chambers. The diffuser section includes diffusers for receiving mixed gases from the mixing chambers. The outlet section receives mixed gases from the diffuser section and conveys those gases to an outlet. The inlet section includes a higher pressure inlet which receives higher pressure gas, and a lower pressure gas inlet which receives lower pressure gas. Each of the mixing chambers has a primary nozzle for introducing primarily higher pressure gas from to a respective mixing chamber, and a secondary inlet for introducing primarily lower pressure gas to each of the mixing chambers.

Abstract: A jet pump apparatus for mixing a higher pressure gas and a lower pressure gas, includes an inlet section, an outlet section, a diffuser section and a mixing section. Inlet section includes a higher pressure inlet and a lower pressure inlet. Mixing section includes a plurality of separated mixing chambers. The diffuser section includes diffusers for receiving mixed gases from the mixing chambers. The outlet section receives mixed gases from the diffuser section and conveys those gases to an outlet. The inlet section includes a higher pressure inlet which receives higher pressure gas, and a lower pressure gas inlet which receives lower pressure gas. Each of the mixing chambers has a primary nozzle for introducing primarily higher pressure gas from to a respective mixing chamber, and a secondary inlet for introducing primarily lower pressure gas to each of the mixing chambers.

Abstract: An environmental control system for conditioning air in a vehicle compartment, such as an aircraft cabin. Cool expanded higher-pressure air from a turbine is mixed with recirculated warmer, lower pressure air from the compartment. The air is mixed and recirculated by a jet pump which includes an inlet section, an outlet section, a diffuser section and a mixing section. The mixing section includes a plurality of separate mixing chambers. The diffuser section includes diffusers for receiving mixed gases from each of the mixing chambers. The outlet section receives the mixed gases which are then conveyed to the compartment. The inlet section includes for each of the mixing chambers, a primary nozzle for introducing the higher-pressure air into a respective mixing chamber, and a secondary nozzle for introducing the lower pressure air to a respective mixing chamber.

Abstract: An environmental control system for conditioning air in a vehicle compartment, such as an aircraft cabin. Cool expanded higher-pressure air from a turbine is mixed with recirculated warmer, lower pressure air from the compartment. The air is mixed and recirculated by a jet pump which includes an inlet section, an outlet section, a diffuser section and a mixing section. The mixing section includes a plurality of separate mixing chambers. The diffuser section includes diffusers for receiving mixed gases from each of the mixing chambers. The outlet section receives the mixed gases which are then conveyed to the compartment. The inlet section includes for each of the mixing chambers, a primary nozzle for introducing the higher-pressure air into a respective mixing chamber, and a secondary nozzle for introducing the lower pressure air to a respective mixing chamber.

Abstract: A jet pump apparatus for mixing a higher pressure gas from a higher pressure gas supply and a lower pressure gas from a lower pressure gas supply, includes an inlet section, an outlet section, a diffuser section and a mixing section, the inlet section including a higher pressure gas inlet and a lower pressure gas inlet, the mixing section including a plurality of separated mixing chambers, and the diffuser section including diffusers for receiving mixed gases from each of the mixing chambers, and the outlet section receiving mixed gases from the diffuser section and conveying the mixed gases to a mixed gas outlet, and the inlet section including a higher pressure gas inlet duct which receives higher pressure gas from the higher pressure gas inlet, and a lower pressure gas inlet duct which receives lower pressure gas from the lower pressure gas inlet, and for each of the plurality of mixing chambers, there being a primary nozzle for introducing primarily higher pressure gas from the higher pressure gas inlet d

Abstract: An environmental control system has a cooling loop including a cooling turbine which, in use, drives a compressor, and an intercooler apparatus, for cooling air compressed by the compressor prior to the air being expanded and cooled over the cooling turbine, and a heat exchanger to which at least a proportion of the cooled and expanded air from the turbine is fed to cool a heat load, and wherein, in a first mode of operation, the cooling loop is closed so that the air circulates around the closed loop from the compressor to the intercooler apparatus to the cooling turbine, and thence to the heat exchanger, and back to the compressor, and in a second mode of operation the cooling loop is open to allow working fluid to pass from the system whilst further working fluid is introduced into the cooling loop, and wherein an ambient air inlet valve is provided to provide for the admission of ambient air to the cooling loop, when the system is operating in the second mode of operation.

Abstract: An environmental control system has a cooling loop including a cooling turbine which, in use, drives a compressor, and an intercooler apparatus, for cooling air compressed by the compressor prior to the air being expanded and cooled over the cooling turbine, and a heat exchanger to which at least a proportion of the cooled and expanded air from the turbine is fed to cool a heat load, and wherein, in a first mode of operation, the cooling loop is closed so that the air circulates around the closed loop from the compressor to the intercooler apparatus to the cooling turbine, and thence to the heat exchanger, and back to the compressor, and in a second mode of operation the cooling loop is open to allow working fluid to pass from the system whilst further working fluid is introduced into the cooling loop, and wherein an ambient air inlet valve is provided to provide for the admission of ambient air to the cooling loop, when the system is operating in the second mode of operation.

Abstract: An air cycle cooling system for cooling a first heat load and a second heat load, the system including a compressor to pressurise air in the system, and an expansion apparatus for allowing the compressed air to expand and cool for use in cooling the first and second heat loads, and wherein at least a proportion of the air utilised for cooling the first heat load is recycled to the compressor and at least a proportion of the air utilised for cooling the second heat load is utilised as a coolant in a primary heat exchanger to cool the air from the first heat load prior to the air from the first heat load being expanded in the expansion apparatus.