نتایج جستجو برای: input energy

تعداد نتایج: 871331  

In this work, the dry reforming of methane was studied using a corona and gliding discharge plasma microreactors. A chemical kinetic model was developed to describe the experimental behavior observed. The kinetic model is proposed based on the assumption that the reactant molecules CH4 or CO2 are attacked by active species produced b...

Journal: :international journal of advanced biological and biomedical research 2014
sajjad firoozi mohammad javad sheikhdavoodi saeedeh mohammadi farani

this paper applied a non-parametric (data envelopment analysis) method to analyze the efficiency of farmers, discriminate efficient farmers from inefficient ones and to identify wasteful uses of energy in order to optimize the energy inputs for greenhouse cucumber production in lorestan province of iran. data were collected from 27 cucumber producers by using a face-to-face questionnaire.dea cr...

Journal: :ماشین های کشاورزی 0
مرتضی تاکی یحیی عجب شیرچی رضا عبدی محمد اکبرپور

in this research energy efficiency for greenhouse cucumber production in shahreza township located in esfahan province using data envelopment analysis (dea) technique was studied. in this study, data were obtained from 25 randomize active vegetable greenhouses from 60 greenhouses in shahreza township and villages environs. the results showed that the highest and lowest consumed energy were rela...

Journal: :مهندسی بیوسیستم ایران 0
کامران خیرعلی پور عضو هیئت علمی/گروه مهندسی مکانیک بیوسیستم، دانشگاه ایلام. زهرا پاینده دانشگاه ایلام محمود کریمی دانشگاه اراک

in this study, energy consumption pattern, efficiency and the percentage of saved energy and inputs of poultry production farms in isfahan, nain and najafabad townships with different capacities were evaluated. the average of net energy gain per 1000 bird for capacities less than 10, 10-30 and more than 30 thousand pieces was calculated as -143.66, -129.58 and -94.99 gj/1000 bird, respectively....

زاهدی, مرتضی, عشقی‌زاده, حمید رضا, مندنی, فرزاد,

A study was conducted in 2009/2010 cropping season in order to determine energy input/out put and productivity of potato and sugar beet production systems in Isfahan province, Central Iran. The data used in this study was based on data collected from growers by using a face to face survey. Total energy consumption and total out put enegy in potato production systems were calculated to be about ...

This research proposes the combination of a dual-loop non-organic Rankine cycle (DNORC) with an internal combustion engine to increase the output power of the recovery system by focusing on the increase in the energy input and system efficiency. In doing so, it investigates the strategy of increasing the mean effective temperature of heat addition in the high-temperature Rankine cycle (HTRC) (t...

Journal: :international journal of smart electrical engineering 2013
samaneh pazouki mahmoud-reza haghifam javad olamaei

the biggest challenges faced in big cities are greenhouse gas emission and growing energy needs. efficient utilization of existing infrastructures has a prominent role in response to the challenges. energy hub approach embraces performance of different energy networks. energy hub is defined as a super node in electrical system receiving distinctive energy carriers such as gas and electricity in...

Journal: :اقتصاد و توسعه کشاورزی 0

pisciculture, especially in countries which are unable to develop their marine resources, is a desired to provide part of their food and protein needs. this study aims at investigating welfare impacts of energy subsidy removal on fish producers in fars province. to achieve the objective, cross-sectional data obtained from fish producers of fars province in 2010 was used. cost, input demand and ...

Journal: :مهندسی بیوسیستم ایران 0
محمدعلی رجایی فر کارشناس ارشد، گروه مهندسی مکانیک ماشین های کشاورزی، دانشگاه تهران، ایران اسداله اکرم دانشیار مهندسی مکانیک ماشین های کشاورزی، دانشگاه تهران، ایران برات قبادیان دانشیار مهندسی مکانیک ماشین های کشاورزی دانشگاه تربیت مدرس، ایران شاهین رفیعی استاد مهندسی مکانیک ماشین های کشاورزی دانشگاه تهران، ایران رضا عبدی دانشیار، گروه مهندسی بیوسیستم، دانشکدۀ کشاورزی، دانشگاه تبریز، ایران

the aims of this study were to assess the energy and economic flows of biodiesel production from olive pomace oil using transesterification method with ultrasound waves. for this purpose biodiesel production from this feedstock were examined through a life-cycle process with considering five main stages of agricultural production, transportation, olive oil extraction, pomace oil extraction and ...

Journal: :مهندسی بیوسیستم ایران 0
رضا اسفنجاری کناری دانشجوی دکتری اقتصاد کشاورزی، دانشگاه زابل مهدی شعبان زاده دانشجوی دکتری اقتصاد کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران پریناز جانسوز دانشجوی دکتری اقتصاد کشاورزی، دانشکدۀ کشاورزی، دانشگاه زاهدان احمد امیدی دانشجوی دکتری مکانیک ماشین آلات کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

with the increasing world population and limitations on arable land, increasing the yield per unit is one of alternatives human food supply. greenhouse cultivation as one ways of increase the performance can arrive this purpose. but the energy restriction of another human challenges, so that increase the performance without considering energy consumption almost appears to be meaningless. due to...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید