The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 2021
Filed:
Oct. 17, 2018
Spirax-sarco Limited, Cheltenham, GB;
Obadah Zaher, Cheltenham, GB;
Jeremy Miller, Cheltenham, GB;
Spirax-Sarco Limited, Cheltenham, GB;
Abstract
There is disclosed a heat enginecomprising: a heat exchangerto transfer heat from a heat sourceto a working fluid; a positive displacement expanderconfigured to receive inlet working fluid from the heat exchangerand discharge expanded working fluid as a multiphase fluid so that there is an overall volumetric expansion ratio between the expanded working fluid and the inlet working fluid which is a function of an inlet dryness of the inlet working fluid; a variable expansion valvedisposed between the heat exchangerand the expander, the valve being configured to introduce a variable pressure drop in the working fluid to vary the inlet dryness; and a controllerconfigured to maintain the overall volumetric expansion ratio by controlling the valveto compensate for variable heat transfer to or from the working fluid.