Patent ID: 7493763
Filing Date: 2009-02-24
Classification: F01K,F17C

Abstract:
1. A thermodynamic system utilizing energy in a liquified low temperature organic fluid which is gaseous at ambient temperature and pressure, comprising: a closed thermodynamic cycle using an organic working fluid, said closed thermodynamic cycle including a vaporizer for vaporizing the organic working fluid, an expander for expanding the vaporized organic working fluid, a condenser/heater connected for condensing vapors extracted from an intermediate stage of said expander, and a condenser connected for condensing the expanded organic working fluid from a lower pressure stage of said expander and supplying the condensate therein to the condenser/heater; means connected to the expander for utilizing the energy of expansion of the vaporized organic working fluid; a source of a liquified low temperature organic fluid which is gaseous at ambient temperature and pressure; and means for regasifying the liquified low temperature organic fluid, the means for regasifying including the condenser, wherein the liquified low temperature organic fluid comprises a heat sink for absorbing heat from the condensing organic working fluid.