Thermodynamics and Irreversibility: From Some Paradoxes to the Efficiency of Effective Engines

• 作者: Olivier Serret
• 来源期刊: 现代物理(英文)
• 学科: 医学
• 关键词: Heat Transfer External and INTERNAL Pressure Work INTERNAL Energy Reversible and IRREVERSIBLE Joule’s Law and Joule’s Experiments ADIABATIC and Free Expansion Clapeyron Diagram Carnot Cycle Engine EFFICIENCY
• 年，卷（期）: 2014,（16）
• 页码范围: 1575-1593
• 页数: 19页
• 分类号: R73

摘要

The traditional thermodynamic theory explains the reversible phenomena quite well, except that reversible phenomena are rare or even impossible in practice. Here the purpose is to propose an explanation valid for reversible and also irreversible phenomena, irreversibility being common or realistic. It previously exposed points tricky to grasp, as the sign of the work exchange, the adiabatic expansion in vacuum (free expansion) or the transfer of heat between two bodies at the same temperature (isothermal transfer). After having slightly modified the concepts of heat transfer (each body produces heat according to its own temperature) and work (distinguishing external pressure from internal pressure), the previous points are more easily explained. At last, an engine efficiency in case of irreversible transfer is proposed. This paper is focused on the form of thermodynamics, on “explanations”;it does not question on “results” (except the irreversible free expansion of 1845...) which remain unchanged.