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:
Oct. 15, 1985
Filed:
Aug. 16, 1982
Eugene B Zwick, Huntington Beach, CA (US);
Other;
Abstract
Time dependent fluctuations in a low pressure drop heat exchanger can be prevented by incorporating an improvement into the heat exchanger and practicing a method relating to the pressure drop across the heat exchanger tubes. The improvement comprises an orifice at or near the inlet of the tube wherein the flow flowing into the tube at a liquid inflow rate enters the tube in the liquid state and is then converted while in the tube into a gaseous state at some point downstream from the orifice. The tube is characterized at a given pressure. The fluid, now in a gaseous state, exits the tube at a gas outflow rate. The orifice is disposed at the input of the tube and is sized to provide an inlet pressure drop across the orifice to the liquid which enters the tube at a magnitude equal to a fractional portion of the low pressure drop across the tube itself. This magnitude is at least large enough so that the absolute magnitude of the change in the gas outflow rate produced by any given change in the tube pressure is greater than the absolute magnitude of the change in the liquid inflow rate produced by the same given change in the tube pressure.