100% freeze protection for thermosiphon solar water heaters
Technical Report
·
OSTI ID:6393232
Solar collectors must be prevented from suffering damage from freezing to become accepted in almost all of the United States. Use of heat exchangers and non-aqueous fluids present serious cost, performance and safety considerations. Development of and inherently freeze protected solar collector to be used in a thermosyphon system is critical for solar energy to become a significant source of energy for residential thermal needs. This project investigates a technique of accomplishing this end by the use of a compliant member inside the tubing of the solar collector and associated supply and return piping. The compliant element is a length of plastic tubing selected for its suitable physical properties for use in a solar collector. The tubing was prepressurized and the tubing then sealed a fixed intervals to provide a safety factor in case there is a failure or leak in the tubing. This report presents the methods used to test the ideas and the results of the construction and testing of a full scale system utilizing this concept.
- Research Organization:
- Leonaitius (Lance), Atlanta, GA (USA)
- DOE Contract Number:
- FG44-81R410454
- OSTI ID:
- 6393232
- Report Number(s):
- DOE/R4/10454-T1; ON: DE85001351
- Country of Publication:
- United States
- Language:
- English
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