کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
303664 512749 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fundamental optimal relation of a spin 1/2 quantum Brayton heat engine with multi-irreversibilities
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fundamental optimal relation of a spin 1/2 quantum Brayton heat engine with multi-irreversibilities
چکیده انگلیسی

In this paper, an irreversible quantum Brayton heat engine cycle model composed of two isomagnetic processes and two irreversible adiabatic processes is established. The quantum heat engine works with non-interacting spin-1/2 systems and has multi-irreversibilities. By using detailed numerical examples, this paper gives the fundamental optimal relationship of the quantum Brayton heat engine, in a general case and at high temperature limits, and analyzes the effects of internal friction and bypass heat leakage on the fundamental optimal relationship. Comparisons of the power output versus efficiency characteristics among this spin quantum heat Brayton engine, a quantum spin Carnot heat engine and a Brayton heat engine working with a classical working medium, are made. Three special cases, such as the endoreversible case, the frictionless case and the case without bypass heat leakage, are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scientia Iranica - Volume 19, Issue 4, August 2012, Pages 1124–1132
نویسندگان
, , , , ,