Xuejian Wang, Hu He, Yurou Sang, Lu Han, Jialin Gu, Congshuai Cao
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Electrical Performance Measurement of Electrical Thermoelectric Generator by Simulating Space Cooling Conditions in Terrestrial Laboratory
Predicting the electrical performance and temperature field of radioisotope thermoelectric generator (RTG) is crucial and essential before they are used in space, a common application scenario. However, building a laboratory to recreate a space environment is expensive and time-consuming. It is also unrealistic to deploy temperature measurement probes in various components of the RTG. This article aims to establish an approach which combines finite element method (FEM) and experimental measurements in the terrestrial laboratory to solve the problem more effectively: first, using FEM to calculate the temperature distribution of RTG operating in the space; second, realizing the similar temperature distribution of self-assembly RTG prototype (electrical thermoelectric generator [ETG]) in the terrestrial laboratory by air cooling. The subsequent measurements of electrical performance indicate that the ETG exhibits a maximum power output of 43.41 W and a maximum thermoelectric conversion efficiency of 5.788% in the simulated space environment, aligning well with the values obtained from FEM. This research has the potential to serve as a method for forecasting the performance of RTG in a terrestrial laboratory.
期刊介绍:
Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy.
This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g.,
new concepts of energy generation and conversion;
design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers;
improvement of existing processes;
combination of single components to systems for energy generation;
design of systems for energy storage;
production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels;
concepts and design of devices for energy distribution.