Passively operated spool valve for drain-down freeze protection of thermosyphon water heaters. Final report

Technical Report · Mon Nov 01 00:00:00 EST 1982

OSTI ID:6657194

Work to develop drain-down valving hardware for the freeze protection of passive (or thermosyphon) solar water heating systems is described. Efforts have focused on two district hydraulic draining schemes. Three types of valve actuators are explored: a PV-powered electrical version, a refrigerant operated version, and an ambient-temperature-sensing, cable-driven heat motor version. (MHR)

• Research Organization: Sunspool Corp., Palo Alto, CA (USA)
• DOE Contract Number: FC02-80CS30533
• OSTI ID: 6657194
• Report Number(s): DOE/CS/30533-T1; ON: DE83004110
• Resource Relation: Other Information: Mf only; illegibility does not permit PC reproduction
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
PASSIVE SOLAR WATER HEATERS
DRAIN-DOWN SYSTEMS
VALVES
AMBIENT TEMPERATURE
COST
FIELD TESTS
FREEZE PROTECTION
MARKET
PERFORMANCE
PHOTOVOLTAIC POWER SUPPLIES
REFRIGERANTS
THERMOSYPHONS
APPLIANCES
CONTROL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUIDS
HEATERS
POWER SUPPLIES
SOLAR EQUIPMENT
SOLAR WATER HEATERS
TESTING
WATER HEATERS
WORKING FLUIDS
140907* - Solar Thermal Utilization- Water Heating