 |
|
|
|
|
|
 Title: |
US5291943:
Heat transfer enhancement using tangential injection
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Dhir, Vijay K.; Santa Monica, CA
|
| Assignee: |
The Regents of the University of California, Oakland, CA
other patents from UNIVERSITY OF CALIFORNIA, THE REGENTS OF (599425) (approx. 4,840)
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
1994-03-08
/ 1992-12-29
|
| Application Number: |
US1992000998536
|
| IPC Code: |
Advanced:
F28D 3/04;
F28F 13/06;
F28F 25/06;
Core:
F28D 3/00;
F28F 13/00;
F28F 25/00;
IPC-7:
F28F 13/12;
|
| U.S. Class: |
Current:
165/109.1;
138/038;
165/174;
165/908;
Original:
165/109.1;
165/174;
165/908;
138/038;
|
| Field of Search: |
165/109.1,174,177,178,908,118
138/038
|
| Priority Number: |
| 1992-12-29 |
US1992000998536 |
|
| Abstract: |
A process for improving the efficiency of heat transfer to a flowing fluid in a tubular heat exchanger by placing an injector on the inlet of each heat exchanger tube, the injector designed to create tangential flow in the tube. The injector used to generate tangential flow comprises a tubular cap with multiple passageways therethrough so that fluid entering the passageways enters the heat exchanger tube along a line tangent to the circumference of the hole extending along the length of the heat exchanger tube. A significant increase in heat transfer at the same pumping power is obtained as a result of the cross sectional shape of the passageway and the dimensions thereof in relationship to the inner diameter of the heat exchanger tube.
|
| Attorney, Agent or Firm: |
Ram, Michael J. ;
|
| Primary / Asst. Examiners: |
Rivell, John;
|
| INPADOC Legal Status: |
Show legal status actions
|
| Family: |
None
|
First Claim:
Show all 15 claims |
What is claimed is:
1. A process for enhancing the heat transfer between a fluid flowing in a lumen in a tube and the wall of the tube, the tube having a defined length and the lumen having a defined cross sectional area, without increasing the power required to pump the fluid, comprising mounting on an inlet end of the tube a cap which allows swirl flow into the tube but which prevents axial flow along the tube, the cap having an open mounting end, a closed end spaced therefrom and a cap wall extending between the open mounting end and the closed end, the cap wall having one or more passageways of a defined cross sectional area extending from an outer surface of the cap wall to an inner surface of the cap wall, each passageway having a uniform cross sectional area for a first portion of its length and the remainder of its length increasing to a diameter at the outer surface of the wall of up to about three times the diameter of the first portion, said passageways being oriented so that fluid entering the passageway at the outer surface of the cap wall flows through the passageway and enters the tube tangential to the wall of the tube, causing swirl flow of the fluid along the tube for at least a substantial portion of the length of the tube, the sum of the cross-sectional areas of the passageways being from about 10% to about 40% of the cross sectional area of the lumen in the tube upon which the cap is mounted, the resultant enhancement of heat transfer at constant pumping power being greater than about 30%.
|
| Background / Summary: |
Show background / summary
|
| Drawing Descriptions: |
Show drawing descriptions
|
| Description: |
Show description
|
| Forward References: |
Show 3 U.S. patent(s) that reference this one
|
