نویسنده
Francoeur, M., Vaillon, R., Mengüç, Mustafa Pınar
تاریخ انتشار
2011-06
محل انتشار
-
IEEE
موضوع
Energy conversion, Nanoscale-gap thermophotovoltaic, Near-field thermal radiation, Thermal effects
نوع
دوره ای
زبان
انگلیسی
دیجیتال
بله
نسخه خطی
خیر
کتابخانه
دانشگاه اوزیغین
شناسه دارایی کتابخانه
0885-8969
شماره ثبت
7ff3c516-be29-4e0b-b450-95ba7d8a8ac3
محل کتابخانه
Mechanical Engineering
تاریخ
2011-06
یادداشتها
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
متن نمونه
The thermal impacts on the performance of nanoscale-gap thermophotovoltaic (nano-TPV) power generators are investigated using a coupled near-field thermal radiation, charge, and heat transport formulation. A nano-TPV device consisting of a tungsten radiator, maintained at 2000 K, and cells made of indium gallium antimonide (In0.18Ga0.82 Sb) are considered; the thermal management system is modeled assuming a convective boundary with a fluid temperature fixed at 293 K. Results reveal that nano-TPV performance characteristics are closely related to the temperature of the cell. When the radiator and the junction are separated by a 20 nm vacuum gap, the power output and the conversion efficiency of the system are respectively 5.83 × 105 Wm−2 and 24.8% at 300 K, whereas these values drop to 8.09 × 104 Wm−2 and 3.2% at 500 K. In order to maintain the cell at room temperature, a heat transfer coefficient as high as 105 Wm−2 K−1 is required for nanometer-size vacuum gaps. The reason for this is that thermal radiation since thermal radiation enhancement beyond the blackbody from a bulk radiator of tungsten is broadband in nature, while only a certain part of the spectrum is useful for maximizing nano-TPV performance. In future studies, near-field radiation spectral conditions leading to optimal performance characteristics of the device will be investigated.
DOI
10.1109/TEC.2011.2118212
Cilt
26
