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Optimal stochastic short-term scheduling of renewable energy hubs taking into account the uncertainties of the renewable sources
, Article Operation, Planning, and Analysis of Energy Storage Systems in Smart Energy Hubs ; 2018 , Pages 189-220 ; 9783319750972 (ISBN); 9783319750965 (ISBN) ; Safdarian, A ; Parvini, Z ; Aramoun, F ; Sharif University of Technology
Springer International Publishing
2018
Design of a Cooling and Energy Recovery System For a Passenger Vehicle
,
M.Sc. Thesis
Sharif University of Technology
;
Saboohi, Yadollah
(Supervisor)
;
ShafiiShafii, Mohammad Behshad
(Co-Advisor)
Abstract
The Engine of a vehicle is an energy conversion system, where specific chemical energy is converted in to heat in a combustion chamber. In order to reduce thermal tension in the cylandr, part of heat is removed with the help of circulating water and it is dissipated in the radiator. As a result, part of input energy is wasted in to the atmosphere through cooling system in each cycle of engine. Heat recovery in the cooling system and preheating combustion air of fuel could enhance energy efficiency and it may contribute to fuel economy. Heat recovery may be realized with the help of heat pipes. Heat pipes may be utilized for heat recovery and preheating fuel or air whichare inlet to the...
Investigation of hydrogen sensing properties and aging effects of Schottky like Pd/porous Si
, Article Journal of Sensors and Actuators B: Chemical ; Volume 146, Issue 1 , 8 April , 2010 , PP. 53–60 ; Iraji Zad, A. (Azam) ; Rahimi, F. (Fereshteh) ; Sharif University of Technology
2010
Abstract
We prepared porous silicon samples coated by continuous palladium layer in electroless process. Scanning electron microscopy (SEM) showed cauliflower-shape Pd clusters on the surface. I–V curves of Schottky like Pd/porous Si samples were measured in air and in hydrogen. These measurements showed a metal–interface–semiconductor configuration rather than an ideal Schottky diode. Variations of the electrical current in the presence of diluted hydrogen at room temperature revealed that the samples can sense hydrogen in a wide range of concentration (100–40,000 ppm) without any saturation behavior. Hydrogen sensing properties of these samples were investigated at room temperature for a duration...