Experimental study on stirling engine generator and solar receiver system for future space applications

Author(s):  
Takeshi Hoshino ◽  
Hitoshi Naito ◽  
Tsutomu Fujihara ◽  
Kunihisa Eguchi
Author(s):  
Houda Hachem ◽  
Ramla Gheith ◽  
Fethi Aloui ◽  
Sassi Ben Nasrallah

Considering Stirling engines modern applications and cogeneration recovery energy from industrial process, the power of a Stirling prime mover is to be provided at a speed of rotation adapted to the operation of the receiver system (usually a generator) to exploit the performance of this machine under the conditions of its use (ie lowering of the rotational speed and torque transmitted rise or, more rarely, elevated speed and lowering the torque transmitted). Knowing that the hot air engine cannot change speed quickly and in order to have a well designed system, it is important to study the unsteady state conditions. In this work we present an experimental stability analysis of an irreversible heat engine working at different conditions. The experimental study aims at analyzing the effect of working parameters disruption on the stability of the Gamma Stirling engine. Parameters involved in this experimental study are the load pressure of the motor and the load applied to the Stirling engine. The influence of engine operating parameters on its torque and rotational speed is investigated. The time required by a gamma type Stirling engine to stabilize operation after disruption is estimated. Results show that after a small disruption, speed and temperature evolutions decays exponentially to the steady state determined by a relaxation time. It is assumed that the decrease of the applied power load to the engine or the increase of the load pressure leads to a speed up. And that the increase of the applied power load to the engine or the decrease of the load pressure leads to a speed down.


2014 ◽  
Vol 113 ◽  
pp. 178-188 ◽  
Author(s):  
Gang Xiao ◽  
Kaikai Guo ◽  
Zhongyang Luo ◽  
Mingjiang Ni ◽  
Yanmei Zhang ◽  
...  

Author(s):  
Nobuhisa Katsumata ◽  
Ryoko Fujii ◽  
M. C. Natori ◽  
Hiroshi Yamakawa

Spirally folded hexagonal membrane structures with inflatable tubes and connective cable networks are presented aiming to establish possible construction scenarios of future large space structure systems over hundreds meters scale and corresponding structures based on the hierarchical modular structure concept using deployable membrane modules. Laboratory scale hand-made conceptual models are manufactured, and their deployment experiments are carried out to show their applicability to the hierarchical modular structures systems.


2000 ◽  
Author(s):  
Arturo Vasquez ◽  
Donald E. Varanauski ◽  
Robert W. Clark

Abstract An effort is underway to develop a Proton Exchange Membrane (PEM) Fuel Cell system for future space applications. A breadboard system has been constructed and includes the following: reactant pressure regulators, ejector-based reactant pumps, a 4-kW fuel cell stack, and a passive, membrane-based oxygen / water separator. A computer model is being developed concurrently to analytically predict fluid flow in the oxidant reactant system. Preliminary data obtained from tests performed with the breadboard system, as well as other published data, has been used to validate the analytical component models. These components have been incorporated into an integrated oxidant fluid system model. Results obtained from both the performance tests and the analytical model are presented.


Author(s):  
Rémi Vicente ◽  
Gilles Nogues ◽  
Laurent Del-Rey ◽  
Jérôme Debray ◽  
David Jegouso ◽  
...  

2017 ◽  
Vol 18 (3) ◽  
pp. 305 ◽  
Author(s):  
N. Martaj ◽  
R. Bennacer ◽  
L. Grosu ◽  
S. Savarese ◽  
A. Laaouatni

Sign in / Sign up

Export Citation Format

Share Document