scholarly journals Improving Power Density of Free-Piston Stirling Engines

2016 ◽  
Author(s):  
Maxwell H. Briggs
Keyword(s):  
Power Density ◽  
Free Piston ◽  
Stirling Engines

Free piston Stirling engines: A review

2019 ◽  
Vol 44 (7) ◽  
pp. 5039-5070 ◽  
Author(s):  
Shahryar Zare ◽  
AliReza Tavakolpour‐Saleh
Keyword(s):  
Free Piston ◽  
Stirling Engines

Control-based design of free-piston stirling engines

2008 ◽  
Author(s):  
Jose A. Riofrio ◽  
Khalid Al-Dakkan ◽  
Mark E. Hofacker ◽  
Eric J. Barth
Keyword(s):  
Free Piston ◽  
Stirling Engines

Coal-Fired Stirling Engines for Railway Locomotive and Stationary Power Applications

1983 ◽  
Vol 197 (4) ◽  
pp. 233-246 ◽  
Author(s):  
G Walker ◽  
J A C Kentfield ◽  
E W Johnson ◽  
R Fauvel ◽  
V Srinivasan
Keyword(s):  
The Other ◽  
Transport Systems ◽  
Working Fluid ◽  
Free Piston ◽  
Large Unit ◽  
Coal Burning ◽  
Marine Propulsion ◽  
Stirling Engines ◽  
Free Piston Stirling Engine ◽  
Sodium Vapour

Increase in the price of oil has stimulated interest in coal-burning engines including the Stirling engines. Applications for large (> 1 MW) coal-burning Stirling engines are foreseen for marine propulsion, stationary power, railway locomotive and the heavy off-highway rubber-tyred equipment used in mining, agriculture, construction and forestry. This paper is directed principally to speculations about large coal-fired Stirling air engines with water lubrication for railway locomotive application, but similar philosophy is applicable in the other applications for large slow running engines. A brief discussion is included about mechanical arrangements and the use of air as a working fluid with water as the lubricant in Stirling engines combined with fluidized bed coal combustors and sodium vapour heat transport systems. The possibilities for railway locomotive application are explored in terms of a large unit designed from the start to utilize Stirling engines and the conversion of existing steam locomotives. Related studies have considered the conversion of diesel-electric locomotives and the designing of a free-piston Stirling engine hydrostatic drive yard locomotive.

A Novel Hydraulic Heat Engine Based on Ferrofluid Displacer With Applications in Solar Power Generation

2017 ◽  
Author(s):  
Mohsen Saadat ◽  
Mehdi Mirzakhanloo ◽  
Pieter Gagnon ◽  
Mohammad-Reza Alam
Keyword(s):  
Heat Transfer ◽  
Power Density ◽  
Heat Engine ◽  
Closed Cycle ◽  
Dynamic Simulations ◽  
Solar Power Generation ◽  
Heat Engines ◽  
Stirling Engines ◽  
Transfer Capability ◽  
Order Of Magnitude

Conventional closed cycle heat engines — such as Stirling engines — have many advantages, such as high theoretical efficiency and the ability to produce useful work out of any heat source. However, they suffer from low power density due to poor heat transfer capability between the working gas and its surrounding walls. In this work, we proposed a new architecture where the solid displacer of a Stirling engine is replaced with a ferrofluid liquid displacer. In this approach, the relative displacer location with respects to the engine chamber is controlled (and stabilized) through a strong magnetic field generated by a permanent magnet. The liquid nature of the displacer allows the hot and cold chambers of the engine to be filled with porous material, improving the heat transfer by an order of magnitude. Additionally, this engine architecture mitigates sealing issues, can operate at higher pressures, and has naturally lubricating surfaces. A relatively simple configuration of this idea is modeled in this work. Exploratory dynamic simulations of this unoptimized architecture show a thermal efficiency of 21% and a power density of approximately 700W/lit.

Axially Opposed Magnetization for Free Piston Stirling Engines

2013 ◽  
Vol 41 (2) ◽  
pp. 143-152 ◽  
Author(s):  
Uri Rogers ◽  
David Clark ◽  
Scott Jackson ◽  
Tammy Ferguson ◽  
David Harris
Keyword(s):  
Free Piston ◽  
Stirling Engines
Sign in / Sign up

Export Citation Format

Share Document