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Thermomechanical generator

About: Thermomechanical generator is a(n) research topic. Over the lifetime, 5 publication(s) have been published within this topic receiving 93 citation(s).

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Journal ArticleDOI
Abstract: The conversion of solar power into electricity is dominated by non-concentrating photovoltaics and concentrating solar thermal systems. Recently, it has been shown that solar thermoelectric generators (STEGs) are a viable alternative in the non-concentrating regime. This paper addresses the possibility of STEGs being used as the power block in concentrating solar power systems. STEG power blocks have no moving parts, they are scalable, and they eliminate the need for an external traditional thermomechanical generator, such as a steam turbine or Stirling engine. Using existing skutterudite and bismuth telluride materials, concentrating STEGs can have efficiencies exceeding 10% based on a geometric optical concentration ratio of 45.

71 citations

Proceedings Article
01 Jan 1975
Abstract: The thermomechanical generator uses a thermomechanical oscillator to convert heat efficiently into a mechanical oscillation which in turn excites a suitable transducer to generate alternating electricity The thermomechanical oscillator used is based on the Stirling cycle, but avoids the need for rotary motion and for sliding pistons by having a mechanically-resonant, spring- suspended displacer, and by using an oscillating metal diaphragm to provide the mechanical output The diaphragm drives an alternator consisting of a spring- suspended permanent magnet oscillating between fixed pole pieces which carry the electrical power output windings Because a thermomechanical generator is much more efficient than a thermo-electric generator at comparable temperatures, it is particularly suitable for use with a radioisotope heat source The amounts of radioisotope and of shielding required are both greatly reduced A machine heated by radioisotopes and delivering 107W ac at 80Hz began operating in October, 1974 Operating experience with this machine is reported, and these results, together with those obtained with higher-powered machines heated by other means, are used to calculate characteristics and performance of thermo- mechanical radioisotope generators capable of using heat sources such as the waste-management $sup 90$Sr radioisotope sources becoming available from the US nuclear waste management programme Amore » design to use one of these heat sources in a 52-W underwater generator is described (auth)« less

10 citations

Journal ArticleDOI
01 Jul 1974
Abstract: This paper reports results of research at Harwell on thermal energy conversion, which has led to the successful development of an efficient heat engine/alternator system 1 capable of delivering several tens of watts of alternating current. It has no rotating or sliding surfaces, so requires no lubrication, and is believed to be capable of operating continuously for many years without wear or need for attention. It is capable of using heat from a variety of sources and is self starting on application of heat. An electrically heated laboratory model is delivering 25 W a.c. with an overall conversion efficiency of 13%

9 citations

Proceedings Article
01 Aug 1984
Abstract: The HOMACH TMG (ThermoMechanical Generator) is a commercially available electrical power source operating on the Stirling cycle principle, and designed for reliable provision of power in the 50 to 500 Watt range, particularly at remote, inaccessible sites This paper briefly discusses the operational principles of the TMG, and describes the progressive development of the concept over the last 10 years The construction of the machine is described, and its unique features are highlighted

2 citations

10 Aug 2016
Abstract: Operational temperature range 500 DEG C is to 1000 DEG C the high temperature fuel cell and the integrated power production system of power rotatory heat engine below 300 kilowatts, including electric power transmission system and at least one electrical?cell, this electrical?cell include again at least one set with a high temperature fuel cell device and an at least rotatory thermomechanical generator. High temperature fuel cell device includes that at least a set of fuel cell piles the unit and piles the air conduit system and the gas pipe -line system of unit connection with each fuel cell, electrochemical reaction takes place and produces the electric energy for gas and air in the fuel cell stack unit, each fuel cell stack unit annular sets up and makes intermediate formation hot -air chamber, rotatory thermomechanical generator high temperature heat absorbing end sets and absorbs the air heat convert mechanical energy into in the hot -air chamber, converts electric energy output into through the generator. High temperature fuel cell combines to turn into the electric energy with the waste heat with rotatory thermomechanical generator and has improved the generating efficiency, and the small distributed application of being convenient for of simple structure.

1 citations

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