On the Efficiency for Non-Endoreversible Stirling and Ericsson Cycles

• 作者: Delfino Ladino-Luna Pedro Portillo-Díaz Ricardo T. Páez-Hernández
• 来源期刊: 现代物理(英文)
• 学科: 医学
• 关键词: Thermal Cycles EFFICIENCY Power OUTPUT ECOLOGICAL Function
• 年，卷（期）: 2013,（12）
• 页码范围: 1-7
• 页数: 7页
• 分类号: R73

摘要

An analysis of the Stirling and Ericsson cycles from the point of view of the finite time thermodynamics is made by assuming the existence of internal irreversibilities in an engine modeled by these cycles, and the ideal gas as working substance is considered. Expressions of efficiency in both regimes maximum power output and maximum ecological function are also shown. Appropriate variables are introduced so that the objective functions, namely power output, ecological function and efficiency can be functions of the reservoirs temperatures ratio and certain “measurable” parameters as a thermal conductance, the general constant of gases and the compression ratio of the cycle. Several results from the finite time thermodynamics literature are used, so that the developed methodology leads directly to appropriate expressions of the objective functions in order to simplify the optimization process.