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US 5,394,709 AGranted
Thermodynamic systems including gear type machines for compression or expansion of gases and vapors
AssigneeSinvent A/S
InventorGustav Lorentzen
Life of this patent
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Abstract
Actual thermodynamic processes occurring in a system such as a heat pump or refrigeration plant are made to approach theoretical ideal processes, e.g. an isothermal (T.sub.o), by use of a multistage gear machine as compressor and/or expander in the system, and conditioning, such as cooling, the system working fluid between successive stages in the machine. The individual stages of the gear machine each include a pair of meshing gears, preferably cylindrical spur gears of equal diameter and diminishing width from stage-to-stage.
Claims13
A closed cycle thermodynamic system comprising:
- a multistage compressor/expander including plural stages, whereby a working fluid circulating through said system is passed through said stages sequentially such that the working fluid is compressed/expanded sequentially from a first said stage to a last said stage;
- each said stage comprising a respective pair of meshing gears of power-transmitting type, and each said stage having a main inlet for introduction of working fluid and a main outlet for discharge of working fluid;
- and
- at least one sequentially adjacent pair of said stages having therebetween an interstage fluid conditioning means for causing temperature variation/phase transition of working fluid passing between said pair of stages, said interstage fluid conditioning means being connected between said main outlet of an upstream stage of said pair of stages and said main inlet of a downstream stage of said pair of stages, such that working fluid compressed/expanded by said upstream stage is conditioned by said interstage fluid conditioning means before being compressed/expanded by said downstream stage.
1 more element
Dependencies are inferred from the claim text.