Self-jigging method of fabricating solar collector heat trap from flexible plastic roll material
US4068361A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Jan 26, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49355
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A solar energy collector of low cost and high thermal efficiency is disclosed having a heat trap produced by zigzagging a thin strip of polyethylene terephthalate between opposite sides of the trap while wrapping the strip about rows of dowels positioned at opposite sides of the frame of the solar collector. A window of soda lime glass filters UV radiation to inhibit discoloration of the plastic heat trap walls. An absorber plate having fluid pipes therein is positioned underneath the heat trap and a first layer of fiberglass, and a second layer of polyurethane foam are positioned below the absorber plate. The fiberglass layer prevents overheating of the polyurethane foam layer to in turn inhibit the formation of toxic fluids, which may condense upon the underside of the window to reduce the efficiency of the collector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.