热电子增强型太阳能碟式-斯特林发电系统的环境、能源与经济评估

Abstract This paper proposed an innovative and comprehensive environmental, energy and economic framework for the potentially promising solar thermionic–Stirling power (TSP) technique, where thermionic emission is coupled to the conventional 10 kW dish–Stirling conversion. Carbon emissions of the thermionic energy converter were accounted for the first time, by referring to the industrial production of the raw materials. The TSP exhibits a net carbon emission of 17726.35 kgCO 2 Eq in the entire life cycle from cradle to grave, where the thermionic converter and Stirling engine contributed 2.01 * 10 3 and 5.38 * 10 3 kgCO 2 Eq respectively. The maximum daily power efficiency of the TSP is 32.91 % in Hangzhou at the emitter work function of 1.8 eV and the collector work function of 1.1 eV, with an efficiency enhancement by 28.04 % compared with that of the traditional dish–Stirling system. The specific carbon emission of the TSP is 19.9–33.2 gCO 2 Eq/kWh for the investigated cities in China, while the carbon payback period ranges from 0.85 to 4.81 years. The TSP implemented in Hohhot achieves a LCoE of 49.73 US$/MWh due to sufficiently strong sunshine under the constrain of internal rate of return = 9 % and net present value ≥0.