An Environmental Control System (ECS) is disclosed for providing conditioned air to a conditioned air space. The ECS includes one or more first modules, each with a turbofan engine or Auxiliary Power Un it (APU), a first heat exchanger, a first turbine, a first water collector, and a first auxiliary fan powered by the first turbine. The ECS also includes one or more second modules. Each second module includes a mixing manifold, a second heat exchanger, an optional second water collector, and a second auxiliary fan powered by a second turbine.

An Environmental Control System (ECS) is disclosed for providing conditioned air to a conditioned air space. The ECS includes one or more first modules, each with a turbofan engine or Auxiliary Power Un it (APU), a first heat exchanger, a first turbine, a first water collector, and a first auxiliary fan powered by the first turbine. The ECS also includes one or more second modules. Each second module includes a mixing manifold, a second heat exchanger, an optional second water collector, and a second auxiliary fan powered by a second turbine.

An energy recovery apparatus, for use in a refrigeration system, comprises a first nozzle, a second nozzle, a turbine, a discharge port, and a housing. The first nozzle comprises a first passageway which is adapted to constitute a portion of a refrigerant flow path when the refrigeration system is operated in a first mode. The second nozzle comprises a second conduit which is adapted to constitute a portion of the flow path when the refrigeration system is operated in a second mode. The turbine is positioned to be driven by refrigerant discharged from either or both of the first and second passageways. The discharge port is adapted to permit refrigerant to flow out of the energy recovery apparatus. The discharge port of the energy recovery apparatus is downstream of the turbine. The turbine is within the housing.

An energy recovery apparatus, for use in a refrigeration system, comprises a first nozzle, a second nozzle, a turbine, a discharge port, and a housing. The first nozzle comprises a first passageway which is adapted to constitute a portion of a refrigerant flow path when the refrigeration system is operated in a first mode. The second nozzle comprises a second conduit which is adapted to constitute a portion of the flow path when the refrigeration system is operated in a second mode. The turbine is positioned to be driven by refrigerant discharged from either or both of the first and second passageways. The discharge port is adapted to permit refrigerant to flow out of the energy recovery apparatus. The discharge port of the energy recovery apparatus is downstream of the turbine. The turbine is within the housing.