研究目的
To design a thermophotovoltaic system that employs a Si rod-type PC thermal emitter with a relatively narrow emission spectrum and verify efficient power generation.
研究成果
The designed thermophotovoltaic system achieves a high system efficiency of 11.2% at an emitter temperature of 1338 K, which is 1.65 times the previously reported record value. The system shows potential for further efficiency improvements and development of distributed energy supplies using combustion heat.
研究不足
The control of the thermal emission spectrum is difficult, and there are losses such as heat conduction from the emitter to other device parts and nonideal properties of the PV cell.
1：Experimental Design and Method Selection:
The study involves designing a thermophotovoltaic system with a Si rod-type PC thermal emitter and photovoltaic cells. The methodology includes fabricating the thermal emitter and PV cells, measuring the heat flux, emitter temperature, and electrical output power.
2：Sample Selection and Data Sources:
The thermal emitter is fabricated using a polycrystalline Si thin film on a MgO substrate. PV cells are based on InGaAs.
3：List of Experimental Equipment and Materials:
Includes a 20 nm thick HfO2 layer on a 500 μm thick MgO substrate, 825 nm of polycrystalline Si, Pt/Ti heater, and InGaAs PV cells.
4：Experimental Procedures and Operational Workflow:
The emitter is heated, and the output characteristics of the PV cells are measured at each temperature. The system is placed in a vacuum chamber for accurate measurements.
5：Data Analysis Methods:
The system efficiency is calculated by dividing the total output power by the total input power. The spectral efficiency and internal conversion efficiency are also analyzed.
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