Lumped Parameter Modelling and Testing of a Free Piston Stirling Engine Heat Exchanger Using Laminated Woven Copper Wire Mesh as Heat Transfer Areas

2016 ◽  
Author(s):  
Franck M. Senda ◽  
Paul T. Senda ◽  
Robert T. Dobson
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Copper Wire ◽  
Stirling Engine ◽  
Wire Mesh ◽  
Free Piston ◽  
Lumped Parameter ◽  
Free Piston Stirling Engine

Design of a Free Piston Stirling Engine Power Generator

2019 ◽  
Author(s):  
Ruijie Li ◽  
Yuan Gao ◽  
Koji Yanaga ◽  
Songgang Qiu
Keyword(s):  
Heat Exchanger ◽  
Heat Exchangers ◽  
High Efficiency ◽  
Waste Heat ◽  
Combustion Engine ◽  
Engine Performance ◽  
Flow Distribution ◽  
Stirling Engine ◽  
Free Piston ◽  
Free Piston Stirling Engine

Abstract Free Piston Stirling Engine is an external combustion engine, which can use diversified energy resources, such as solar energy, nuclear energy, geothermal energy, biomass, industrial waste heat etc. and is suitable for the remote area power generation due to the advantage of robustness, durability, reliability, and high efficiency. In this work, a Free Piston Stirling Engine has been designed based on the numerical simulation results and previous experimental experience. Direct Metal Laser Sintering method has been adopted for the manufacturing of the key components including the displacer cap, displacer body, piston housing, cold heat exchanger, and regenerator. One dimension analysis using Sage software has been conducted. The designed engine has a power output of 65W with the hot and cold end temperature is 650°C and 80°C respectively, and charge pressure is 1.35 MPa. Finite Element Method has been used to analyze the structural stress of the engine, which is operated at the high temperature and high pressure, to determine if it is able to tolerate the operating condition designed by the Sage according to the Section VIII Division 2 of the ASME Boiler and Pressure Vessel (BPV) Code. In addition, Computational Fluid Dynamics (CFD) method has been used to investigate the flow distribution in heat exchangers (heat acceptor, regenerator, and heat rejecter), as the heat exchanger performance affect the engine performance greatly. Considering the large mesh number, a quarter of the heat exchangers have been investigated, in order to reduce the mesh numbers and accelerate the calculation speed.

A Lumped-Parameter Dynamic Model of a Thermal Regenerator for Free-Piston Stirling Engines

2009 ◽  
Author(s):  
Mark Hofacker ◽  
James Kong ◽  
Eric J. Barth
Keyword(s):  
Dynamic Model ◽  
Control Volume ◽  
Matrix Material ◽  
Stirling Engine ◽  
Functional Requirements ◽  
Free Piston ◽  
Lumped Parameter ◽  
Dynamics And Control ◽  
Free Piston Stirling Engine ◽  
And Control

This paper uses lumped parameter dynamic equations to model the mass flow, piston dynamics, and control volume behavior inside a free-piston Stirling engine. A new model for a Stirling engine thermal regenerator that incorporates a dynamically changing temperature gradient is presented. The use of graphite as a regenerator matrix material is justified despite its limited background by comparing the functional requirements of regenerators to heat exchangers where graphite use is commonplace. Experimental results are used to characterize a graphite regenerator and validate the dynamic model.

Nanogrid for Home Application for Micro CHP based on Free Piston Stirling Engine

2020 ◽  
Author(s):  
Daniele Menniti ◽  
Anna Pinnarelli ◽  
Nicola Sorrentino ◽  
Giuseppe Barone ◽  
Giovanni Brusco ◽  
...  
Keyword(s):  
Stirling Engine ◽  
Free Piston ◽  
Free Piston Stirling Engine
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