A numerical study on the effects of moving regenerator to the performance of a β -type Stirling engine

Author(s):  
Wen-Lih Chen ◽  
King-Leung Wong ◽  
Yu-Feng Chang
2020 ◽  
Vol 146 (4) ◽  
pp. 04020028
Author(s):  
Panagiotis Bitsikas ◽  
Emmanouil Rogdakis ◽  
George Dogkas

2020 ◽  
Vol 170 ◽  
pp. 115039 ◽  
Author(s):  
Saúl Islas ◽  
Ricardo Beltran-Chacon ◽  
Nicolás Velázquez ◽  
Daniel Leal-Chávez ◽  
R. López-Zavala ◽  
...  

2017 ◽  
Vol 48 (6) ◽  
pp. 477-498 ◽  
Author(s):  
Halit Karabulut ◽  
Hamit Solmaz ◽  
Fatih Aksoy

Author(s):  
Ana C. Ferreira ◽  
Senhorinha Teixeira ◽  
Christophe Ferreira ◽  
José Teixeira ◽  
Manuel L. Nunes ◽  
...  

The last decade has witnessed a growing interest in the use of Stirling engine cogeneration systems for residential applications, due to their prospect for high efficiency, good performance at partial load, fuel flexibility, including the possible use of renewables, low emissions, vibration and noise levels. Stirling engines have sealed operating chambers, low wear and, as a consequence, low operating costs. In the European building sector, micro-cogeneration power plants are being designed to fulfill the heating requirements of the building and, additionally, generate electricity for internal consumption or for feeding into the local grid. Thermal-economic evaluation represents an effective tool to optimize a power plant with this type of technology. The mathematical formulation includes a set of equations able to describe and simulate the physical system, as well as a set of equations that define the cost of each plant component. This paper presents a numerical study faithfully simulating the real conditions of a micro-CHP unit based on an alpha type Stirling Engine. The simulations were performed through a MatLab® code that assesses the thermodynamic efficiency, including heat transfer limitations and pumping losses throughout the system. Results showed that heat-transfer limitations strongly affect cycle efficiency, particularly in the regenerator case. The pumping losses are less important when hydrogen or helium are used.


2021 ◽  
Vol 143 (4) ◽  
Author(s):  
E. Sanmiguel-Rojas ◽  
P. Gutierrez-Castillo ◽  
J. A. Auñón-Hidalgo

Abstract The present work is focused on the numerical study of a solar-powered Stirling engine, with the particularity that the solar radiation is injected through a transparent top cover. Thus, the working fluid absorbs the heat across a porous layer of a steel woven wire screen placed alongside the inner side of the transparent wall. The engine output net power and efficiency are studied as a function of the porosity, engine speed, temperature of the expansion chamber, and wire diameter of the screen. It is found that the engine efficiency remains practically constant for porosity values over 0.7, but there is a relevant increase of the engine output net power compared to the same working conditions without the absorbing layer. For a given porosity value, the most significant increase of net power due to introducing the porous layer was reached when doubling the engine speed resulting in an increment close to 40%.


2020 ◽  
Vol 78 (3) ◽  
pp. 141-159 ◽  
Author(s):  
Hua Zhu ◽  
Xiaohong Yang ◽  
Rui Tian ◽  
Lei Han ◽  
Liping Wang

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