SOLAR THERMOELECTRIC GENERATOR SYSTEM CONCEPT AND FEASIBILITY STUDY.
Abstract
The feasiblity of combining concentrated solar energy, thermal storage, and a thermoelectric generator as a power supply for space applications has been proven. A nominal 14 watt model, for operation in a 300 mile earth orbit, has been fabricated, tested using electric heat input in an altitude chamber, tested using natural solar energy input in an earth atmosphere and operated on a life test. A 90 minute orbit with 55 minutes of energy input, or sunlight, and 35 minutes of darkness has been simulated. The generator produced constant power (= 7%) for the full 90 minutes. Practical factors obtained from the feasibility model testing have been incorporated into an analytical investigation of a complete system. A power-to-weight ratio of 2.4 is attainable at a power level of 70 watts using a present day 5 foot diameter collector concentrator. The system efficiency (power output from the generator vs. solar energy intercepted) of 4.3% is produced with a thermopile producing 13 watts per pound. Thirty eight (38) per cent of the system weight is provided by the collector concentrator. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1964
- Accession Number
- AD0430127
Entities
Organizations
- Westinghouse Electric Corporation