Download or read book Power Flattening Techniques for Radioisotopic Thermoelectric Generators written by and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program was to investigation of a novel means of reducing the potential ecologic hazards that may be associated with radiosotopic thermoelectric generators (RTG's). A number of short lived isotopes have lower toxicities and are more ecologically acceptable than the Plutonium 238 used at present. In addition, the shorter half lives significantly reduce the time period during which isotope encapsulation must be assured (approximately 10 half lives). The technical approach involves the use of a gas controlled heat pipe to maintain a nearly constant heat input to the thermoelectric converter in spite of the decay profile of a short lived isotopic heat source. Excess thermal power available early in life, is automatically shorted around the thermoelectric module by way of the heat pipe. A development model of a gas controlled heat pipe capable of performing the required task was constructed and tested during this program.

Download or read book POWER FLATTENING STUDIES FOR RADIOISOTOPE THERMOELECTRIC GENERATORS Final Report written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The natural exponential decay of a radioisotope used as a heat source for a thermoelectric generator makes the use of a power flattening'' device highly desirable, especially when the duration of the mission is large compared to the half life of the radioisotope. Power-flattening devices are considered which either dump excess heat outside the thermoelectric generator or use the characteristics of the generator to absorb the excess heat and thereby regulate the hot junction temperature. A number of power-flattening devices were studied both analytically and experimentally with a view toward operability in space. The most promising concepts are (a) to utilize a secondary radiator of variable area; (b) to provide thermal shunts that are sequentially removed during the mission; (c) to use a secondary radiator coupled to the heat source through a slowly evaporating thermal connection. (auth).

Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings Reports and Prints of the Joint Committee on Atomic Energy written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1966 with total page 1822 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings written by United States. Congress. House and published by . This book was released on 1966 with total page 2762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1962 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Works Appropriations for 1962 written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1961 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1972 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Energy Conversion Literature Abstracts written by and published by . This book was released on 1964-12 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Works Appropriations for 1962 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Public Works Appropriations and published by . This book was released on 1961 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Works Appropriations for 1966 written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1965 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings Reports and Prints of the House Committee on Appropriations written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1965 with total page 1312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Works Appropriations for 1966 written by United States. Congress. House Appropriations and published by . This book was released on 1965 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AEC Authorizing Legislation Fiscal Year 1966 written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1965 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AEC Authorizing Legislation written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1965 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings and Reports on Atomic Energy written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1946 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt: