Heat transfer tube for absorber
US5960870A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F1/426
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
To provide a heat transfer tube for an absorber in which the quantity of residence of an absorbing liquid on the surface of the tube staying in trough portions is large, and the staying absorbing liquid is thinly and widely spread on the surface of the tube to materially promote an absorbing performance. On an outer surface of a metal tube having an outer diameter of D, a group of N (N is a natural number) number of trough portions, wherein the length L1 in a longitudinal direction of the tube is 70 mm.ltoreq.L1.ltoreq.130 mm, and the depth H is 0.23 mm.ltoreq.H<0.5 mm, is formed on a circumference of a circle formed in section of the tube in the case of being cut perpendicular to a longitudinal direction of the tube so that the pitch P (=.pi. D/N) is set in the range of 6.2 to 8.7 mm, said group of trough portions being formed in plural in a longitudinal direction of the tube, and said group of trough portions adjacent to the longitudinal direction of the tube being arranged so that the ends of each trough portion are entered each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.