نتایج جستجو برای: work efficiency

تعداد نتایج: 1287132  

There are heat losses during the cycle of real engine that are neglected in ideal air-standard analysis. In this paper, the effect of heat transfer on the net output work is shown and thermal efficiency of the air-standard Atkinson and the Dual combustion cycles are analyzed. Comparison of performances of the air-standard Atkinson and the Dual combustion cycles with heat transfer considerations...

A. H. Mosafa , L. Garooci Farshi, S. M. Seyed Mahmoudi ,

The exhaust gases of gas turbine power plant carry a significant amount of thermal energy that is usually expelled to the atmosphere this causes a reduction in net work and efficiency of gas turbine. On the other hand, the generated power and efficiency of gas turbine plants depend largely on the temperature of the inlet air, So that they both increase as the inlet air temperature decreases. Th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد 1388

two groups of students were assigned as experimental and control ones, and were given instruction on directed reading-thinking activities and after some treatment, they were post-tested. although the initial pre-test did not show any significant differences, the final post-test result revealed that the cooperative reading comprehension helped the experimental group. the cooperative students’...

Journal: :Entropy 2013
Xuehui Zhang Haisheng Chen Xiaohui Yan Xinjing Zhang Chunqing Tan

The performance and design criteria of air powered multistage turbines are studied thermodynamically in this paper. In-house code is developed in the C++ environment and the characteristics of four-stage turbines with inter-heating are analyzed in terms of maximum thermal efficiency, maximum exergy efficiency and maximum work output over the inlet temperature range of 293 K–793 K with inlet pre...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2004
naser saghatoleslami javad sargolzaei seyyed mahmood mousavi

hydrogen is an unusual substance in that its molecule exists in two forms, known as ortho and para, with markedly different properties. energy level of the ortho molecule is higher than para, therefore, the latter is employed for industrial purposes. consequently, for a high  conversion of  ortho to para hydrogen a catalyst reactor must be employed.  therefore, one of  the main objectives of th...

Journal: :South Asian journal of marketing 2022

Purpose This study aims to explore whether the working parents' perception about necessity of childcare centres for their work efficiency is associated with anxieties and concerns related dual responsibilities, i.e. providing proper parental maintaining efficiency. Design/methodology/approach A sample 100 employed parents, from Jashore region Bangladesh, was surveyed, descriptive inferential st...

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