External combustion power producing cycle
AssigneeD-Cycle Associates
InventorJohn Gordon Davoud
Life of this patent
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Abstract
Steam or other condensable vapor heated to a maximum temperature at a maximum pressure permitted by the system is expanded to a lower pressure in a positive displacement expander; the partially expanded fluid is then further expanded in a turbine, a portion of the fluid in the turbine is withdrawn and directed to a positive displacement compressor and compressed to the maximum operating pressure while introducing the condensate of the remaining portion of the fluid into the compressor. The compressed fluid is then reheated to maximum temperature and the cycle repeats.
Claims16
A power producing method, of the external combustion type, the method including heating a condensable vapor to a predetermined temperature at a predetermined pressure:
- a. expanding the heated condensable vapor in a first work producing zone to a lower pressure;
- b. reheating the vapor expanded in step (a);
- c. expanding the reheated vapor to a lower pressure;
- d. passing a portion of the vapor expanded in step (c) to a work-demanding zone;
- e. condensing the remainder of the vapor expanded in step (c) at the lower pressure;
- f. adding the condensate formed in step (e) or its weight equivalent to the vapor in the work-demanding zone of step (d);
- g. utilizing the work produced in expanding the vapor in the first work-producing zone, step (a), to compress the vapor passed to the work-demanding zone, step (d), plus the added condensate, from step (e), from the vapor expanded to the lower pressure, to compress the vapor plus liquid to the original predetermined pressure.
A power producing method, of the external combustion type, the method including heating a condensable vapor to a predetermined temperature at a predetermined pressure;
- a. expanding the heated condensable vapor in a first work producing zone to a lower pressure;
- b. reheating the vapor expanded in step (a);
- c. expanding in a second work producing zone the vapor reheated in step (b) to a lower pressure;
- d. passing a portion of the vapor expanded in step (c) to a work-demanding zone;
- e. further expanding in a third work producing zone the remaining portion of the vapor expanded in step (c) to a still lower pressure;
- f. condensing the vapor expanded in step (e) to liquid;
- g. adding the condensate from step (f) to the vapor in the work-demanding zone of step (d);
- h. utilizing the work produced in expanding the vapor in the first work-producing zone, step (a), to compress the vapor passed to the work-demanding zone, step (d), plus the added condensate from step (f) to compress the vapor plus liquid to the original predetermined pressure.
Dependencies are inferred from the claim text.