The Material of the Working Fluid of the Solar Energy Heat Converter for Space Application

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Mar’yinskykh, Yu.M.

The Material of the Working Fluid of the Solar Energy Heat Converter for Space Application Journal Article

Mechanics, Materials Science & Engineering, 12 (1), 2017, ISSN: 2412-5954.

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Authors: Yu.M. Mar’yinskykh

ABSTRACT. The research is dedicated to reasoning the need for creation of a functional material as an active medium of conversion of solar energy into mechanical energy with further conversion of it into electric power and using it in power plants and in projects of solar power satellites (SPSs). There have been considered the ways of generating energy from the points of view of the environment and inexhaustibility, which include photoconverting power engineering, methods of heat conversion of solar energy and the problems, restraining creation of large-sale projects. The result of the research is the development of a method of continuous generating useful mechanical energy by using the functional material (working fluid) in the process of heating it with solar radiation in the heat-absorbing zone and cooling it down in the heat-radiating zone within the optimum rated temperature range. The corresponding theoretical researches have been conducted in order to assess quantitatively the capacity of the metal segment as working fluid of the heat-converting panel while the thermal solar energy converter (TSEC) for space application is functioning. The graphic curves of segments capacity in various temperature ranges have been presented herein. The time response of the TSEC metal segment functioning cyclicity has been studied at solar concentration of n = 1.2, for different temperature ranges. A solution has been suggested that allows a significant increase of TSEC efficiency by improving the physical and technical characteristics of the segment material. The promising character of changing one of the series of parameters that define the segment material has been shown; and it leads to an opportunity to compete with photoconverting systems according to their efficiency, provided several parameters are combined in an optimum way. A variant of structure of a TSEC as an electric drive has been shown. It may also be applied on earth if modified correspondingly. The conversion method under consideration enables to construct SPSs and calculate the paths of motion so that the time of a power plant being in the subsolar zone and the shadow zone while moving around the Earth per one rotation could match the time of a TSEC cycle.

Keywords: thermal solar energy converter (TSEC), space application, power, construction, parameters, temperature

DOI 10.2412/mmse.90.3.605


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