کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1278945 1497577 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Maximum efficiency of direct energy conversion systems. Application to fuel cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Maximum efficiency of direct energy conversion systems. Application to fuel cells
چکیده انگلیسی

This work develops a methodology to calculate the maximum First Law efficiency of any power device. To do so external irreversibilities due to heat transfer are suppressed by means of Carnot engines which mechanical work is added up to the one resulting from the device under hypothetical internally reversible mode of operation. By applying the developed methodology comparisons between Direct Energy Conversion Systems (DECS) and power cycles can be properly set on balanced assumptions in each type of device. In this paper, the main equations of the methodology are presented and the specific equations for fuel cells are derived. The potential of this methodology is illustrated by comparing fuel cells and power cycles First Law efficiency as a function of temperature.


► We develop a methodology to assess the maximum efficiency of any power device.
► Methodology allows fair comparison between power cycles and fuel cells.
► Increasing temperature will increase efficiency in totally reversible fuel cells.
► Implementation of methodology in fuel cells can be achieved by bottoming cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 16, August 2011, Pages 10027–10032
نویسندگان
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