Power cycle and system for utilizing moderate and low temperature heat sources

A method for implementing a two cycle thermodynamic system comprising the steps of:

• combining a first stream and a second stream to form a combined stream, where the first stream comprises a first concentration of at least one lower boiling component and a first concentration of at least one higher boiling component and where the second stream comprising a recirculating concentration of the at least one lower boiling component and a recirculating concentration of the at least one higher boiling component;
• fully vaporizing a pre-vaporized stream with an external heat source stream to form a fully vaporized stream;
• expanding and transforming thermal energy from the fully vaporized stream into a usable energy form to produce a spent stream,
• cooling and separating the spent stream into a vapor stream and the second stream, where the vapor stream has a higher concentration of the at least one lower boiling component than a concentration of the at least one lower boiling component of the spent stream;
• forming a mixed stream from the vapor stream and a portion of the second stream;
• condensing the mixed stream with an external coolant stream to form a condensed stream;
• heating the condensed stream with heat derived from the mixed stream, the spent stream and the external heat source stream to form the first stream,
• heating the combined stream with the external heat source stream to form a partially vaporized stream,
• separating the partially vaporized stream into a second vapor stream and a liquid stream,
• forming the pre-vaporized stream from the second vapor stream and a portion of the liquid stream;
• and
• adding a remainder of the liquid stream to the spent stream prior to cooling the spent stream.

A method for implementing a two cycle thermodynamic system comprising the steps of:

• combining a first stream and a second stream to form a combined stream, where the first stream comprises a first concentration of at least one lower boiling component and a first concentration of at least one higher boiling component and where the second stream comprising a recirculating concentration of the at least one lower boiling component and a recirculating concentration of the at least one higher boiling component;
• fully vaporizing a pre-vaporized stream with an external heat source stream to form a fully vaporized stream;
• expanding and transforming thermal energy from the fully vaporized stream into a usable energy form to produce a spent stream,
• cooling and separating the spent stream into a vapor stream and the second stream, where the vapor stream has a higher concentration of the at least one lower boiling component than a concentration of the at least one lower boiling component of the spent stream;
• forming a mixed stream from the vapor stream and a portion of the second stream;
• condensing the mixed stream with an external coolant stream to form a condensed stream;
• heating the condensed stream with heat derived from the mixed stream, the spent stream and the external heat source stream to form the first stream,
• heating the combined stream with the external heat source stream to partially vaporized stream,
• separating the partially vaporized stream into a second vapor stream and a liquid stream,
• forming the pre-vaporized stream from the second vapor stream and a portion of the liquid stream;
• decreasing a pressure of a remainder of the liquid stream to form a second mixed stream;
• separating the second mixed stream into a third vapor stream and a second liquid stream;
• adding the second liquid stream with to the spent stream prior to cooling the spent stream;
• and
• adding the third vapor stream to the second stream prior to combining the first and second streams.

A method for implementing a two cycle thermodynamic system comprising the steps of:

• combining a first stream and a second stream to form a combined stream, where the first stream comprises a first concentration of at least one lower boiling component and a first concentration of at least one higher boiling component and where the second stream comprising a recirculating concentration of the at least one lower boiling component and a recirculating concentration of the at least one higher boiling component;
• fully vaporizing a pre-vaporized stream with an external heat source stream to form a fully vaporized stream;
• expanding and transforming thermal energy from the fully vaporized stream into a usable energy form to produce a spent stream,
• cooling and separating the spent stream into a vapor stream and the second stream, where the vapor stream has a higher concentration of the at least one lower boiling component than a concentration of the at least one lower boiling component of the spent stream;
• forming a mixed stream from the vapor stream and a portion of the second stream;
• condensing the mixed stream with an external coolant stream to form a condensed stream;
• and
• heating the condensed stream with heat derived from the mixed stream, the spent stream and the external heat source stream to form the first stream
• heating the first stream with the external heat source stream prior to combining the first and second streams,
• heating the combined stream with the external heat source stream to partially vaporized stream,
• separating the partially vaporized stream into a second vapor stream and a liquid stream,
• forming the pre-vaporized stream from the second vapor stream;
• decreasing a pressure of the liquid stream to form a second mixed stream;
• separating the second mixed stream into a third vapor stream and a second liquid stream;
• adding the second liquid stream with to the spent stream prior to cooling the spent stream;
• and
• adding the third vapor stream to the second stream prior to combining the first and second streams.

A method for implementing a two cycle thermodynamic system comprising the steps of:

• combining a first stream and a second stream to form a combined stream, where the first stream comprises a first concentration of at least one lower boiling component and a first concentration of at least one higher boiling component and where the second stream comprising a recirculating concentration of the at least one lower boiling component and a recirculating concentration of the at least one higher boiling component;
• fully vaporizing a pre-vaporized stream with an external heat source stream to form a fully vaporized stream;
• expanding and transforming thermal energy from the fully vaporized stream into a usable energy form to produce a spent stream,
• cooling and separating the spent stream into a vapor stream and the second stream, where the vapor stream has a higher concentration of the at least one lower boiling component than a concentration of the at least one lower boiling component of the spent stream;
• forming a mixed stream from the vapor stream and a portion of the second stream;
• condensing the mixed stream with an external coolant stream to form a condensed stream;
• and
• heating the condensed stream with heat derived from the mixed stream, the spent stream and the external heat source stream to form the first stream
• adding a third liquid stream to the condensed stream,
• wherein the heating step includes the step of heating the condensed stream with heat derived from the mixed stream to form a pre-heated stream;
• decreasing a pressure of a first portion of the pre-heated stream to form a third mixed stream,
• separating the third mixed stream into a fourth vapor stream and the third liquid stream,
• adding the fourth vapor stream to the second stream prior to combining the first and second streams,
• heating the combined stream with the external heat source stream to partially vaporized stream,
• separating the partially vaporized stream into a second vapor stream and a first liquid stream,
• forming the pre-vaporized stream from the second vapor stream and a portion of the first liquid stream;
• decreasing a pressure of a remainder of the first liquid stream to form a second mixed stream;
• separating the second mixed stream into a third vapor stream and a second liquid stream;
• adding the second liquid stream with to the spent stream prior to cooling the spent stream;
• adding the third vapor stream to the second stream prior to combining the first and second streams,
• where in the heating step, heat is also derived from the second stream prior to combining the first and second stream.