초록 ▼

A heat machine which employs a condensing working fluid in a Stirling type mechanical arrangement. An initial mass of working fluid is contained within a closed space. Portions of hot and cold volumes are cyclically varied, which transfers a small percentage of the working fluid through large hot an

A heat machine which employs a condensing working fluid in a Stirling type mechanical arrangement. An initial mass of working fluid is contained within a closed space. Portions of hot and cold volumes are cyclically varied, which transfers a small percentage of the working fluid through large hot and cold heat exchangers interconnected with a periodic flow regenerator. With the exception of the regenerator space, the transferred working fluid is substantially in the liquid phase during the near isothermal heat rejection and compression stages, and substantially in the superheated vapor phase during the near isothermal heat addition and expansion stages. A control cylinder varies the effective mass of working fluid within the machine, so as to provide for output control. Decreasing the effective mass causes a shift in the operating cycle toward the superheated vapor region with lower mean pressure cycles, and increasing the mass causes a shift to the liquid region with higher mean pressure cycles. The large near isothermal heat exchangers assist in effective regeneration of the working fluid through the vapor dome, and further, provide considerable improvement in cycle thermal efficiencies. Also, the condensed working fluid requires less input work and the total cycle pressure/volume characteristics exhibit greater output work, especially during the expansion phase, than do conventional Stirling machines.

대표청구항 ▼

A heat machine, comprising: a hot chamber having a fixed volume and a variable hot volume; a cold chamber having a fixed volume and a variable cold volume; a heat regenerator chamber in fluid communication between said hot chamber and said cold chamber, said regenerator chamber including heat retain

A heat machine, comprising: a hot chamber having a fixed volume and a variable hot volume; a cold chamber having a fixed volume and a variable cold volume; a heat regenerator chamber in fluid communication between said hot chamber and said cold chamber, said regenerator chamber including heat retaining means; means for coupling said variable hot volume and said variable cold volume to provide a predetermined maximum pressure and a predetermined minimum pressure within said hot chamber, said cold chamber, and said regenerator chamber, at different portions of a cycle; means for supplying heat to said hot chamber to maintain a predetermined high temperature; means for removing heat from said cold chamber to maintain a predetermined low temperature; a predetermined mass of working fluid in said hot chamber, said cold chamber, and said regenerator chamber, said working fluid being selected to enter or be near a wet liquid vapor state at a said predetermined high temperature and said maximum pressure and to enter or be near a wet liquid vapor state at said predetermined low temperature and said minimum pressure; and working fluid mass control means for varying the effective quantity of mass present in said cold chamber to provide for output control.