Optimum performance characteristics of a solar-driven Stirling heat engine system. (June 2015)

• Record Type: Journal Article
• Authors: Liao, Tianjun; Lin, Jian
• Is Part Of: Energy conversion and management. Volume 97(2015)
• Page Start: 20
• Page End: 25
• Publication Date: 2015-06
• Subjects: Stirling heat engine -- Optimum performance characteristics -- Lagrange multiplier method -- Irreversible thermodynamics; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2015.03.027
• Languages: English
• ISSNs: 0196-8904

Abstract

Graphical abstract: T – S diagram of the SHE cycle. Highlights: Based on Lagrange multiplier method, the optimal performance are investigated. The energy balance between the absorber and the hot side of Stirling heat engine is considered. The effects of major parameters on the optimal performance are investigated. Abstract: A solar-driven Stirling heat engine system composed of a Stirling heat engine, a solar collector, and a heat sink is presented, in which the radiation and convection heat losses of the solar collector, the heat-leak between the thermal absorber and heat sink, the regenerative losses of the Stirling heat engine, and the energy balance between the thermal absorber and the high isothermal process of the Stirling heat engine are taken into consideration. Based on the irreversible thermodynamics and Lagrange multiplier method, the maximum power output and the corresponding optimal efficiency of the system are determined and the absorber temperature that maximizes the optimal system efficiency is calculated numerically. The influences of some system parameters such as the concentrating ratio, the volume ratio during the regenerative processes and irreversibilities of heat exchange processes on the optimal efficiency are analyzed in details. The results obtained here may provide a new idea to design practical solar-driven Stirling heat engine system.