نتایج جستجو برای: loss coefficient

تعداد نتایج: 608365  

Journal: :Energies 2022

This research aimed to introduce a comprehensive mathematical modeling approach based on the maximization of power coefficient (Cp) obtain regulation in pitch angle and tip speed ratio (TSP), taking into account detailed losses at different stages train wind turbine. The model is used track optimal turbine train, considering both direct (without gearbox) indirect (with drive configurations. res...

2013
Anuj Agrawal

Constraint programming is the study of system which is based on constraints. The solution of a constraint satisfaction problem is a set of variable value assignments, which satisfies all members of the set of constraints in the CSP. In this paper the application of constraint satisfaction programming is used in predicting the path loss of various indoor propagation models using chronological ba...

2012
Wei Liu Qingyan Chen Vicent P. Reilly Zhengwei Long

Knowing loss coefficients of duct fittings is crucial for designing a duct network for HVAC systems. Traditionally, the coefficients have been obtained using experimental measurements according to AHSRAE Standard 120, a process which is time consuming and expensive. An alternative is to use CFD, but this has uncertainty due to the approximations used in modeling turbulence. This study first val...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده کشاورزی 1390

abstract this study is carried out to determine the chemical composition in the three vegetative stages of the haloxylon sp., degradation parameters, with adding naoh and ca(oh2 ). for this purpose, in may and october and january 2010 enough some haloxylon sp. of the ammary area was prepared. crude protein and ash percentage are decrease, neutral detergent fiber percentage with pragress stage ...

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