نتایج جستجو برای: 312 the total energy consumption
تعداد نتایج: 16248822 فیلتر نتایج به سال:
Aims: Increasing consumption of the earth's primary resources (materials and energy) in addition to the production of environmental and atmospheric pollutants (especially CO2), poses a serious threat to sustainable human life. The aim of this study was to evaluate the effect of using concrete, brick and wood in traditional construction in northwestern Iran on energy consumption and carbon emiss...
Energy plays a significant role in today's developing societies. The role of energy demands to make decisions and policy with regard to its production, distribution, and supply. The vital importance of energy, especially fossil fuels, is a factor affecting agricultural production. This factor has a great influence on the production of agricultural products in Iran. The forecast of the con...
Today, energy is known as one of the main factors for the formation and development of industrial societies And the availability of countries to various energy sources represents their potential for political and economic progress. Therefore, the main objective of this study was to investigate the effect of technology factors on the intensity of energy in 29 provinces of Iran (except for Alborz...
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...
Cost of cement producing all over the world depends on to the level of wages, energy cost and availability of raw materials. By investigating financial statements of various companies at the stock market, the share of electrical and fuel costs are nearly 27 percent of total costs and this plays the important role in right management of energy consumption. In this regard mathematics modeling and...
هدف از این مطالعه بررسی ارتباط بین مصرف انرژی و رشد اقتصادی در کشورهای عضو اوپک طی دوره زمانی 2009-1995 می باشد. در این مطالعه برای بررسی ارتباط کوتاه مدت از الگوی خودرگرسیون برداری و برای رابطه بلند مدت از آزمون هم جمعی یوهانسن و الگوی تصحیح خطای برداری استفاده شده است. نتایج به دست آمده نشان دهنده آن است که در کوتاه مدت مصرف انرژی با رشد اقتصادی در کشورهای عضو اوپک رابطه مثبت و البته غیر معنا...
Wheat is the dominant cereal crop constituting the first staple food in Iran. This paper studies the energy consumption patterns and the relationship between energy inputs and yield for Wheat production in Iranian agriculture during the period 1986 – 2008. The results indicated that total energy inputs in irrigated and dryland wheat production increased from 29.01 and 9.81 GJ ha-1 in 1986 to 44...
About 20% of the electricity produced in the world is consumed in rotary equipment for conveying fluids such as water, gas, air, and other liquids, while the loss of energy consumption in this sector is more than 60%. The aim of this study is to evaluate different efficiencies in the pumping stations in the pressurized irrigation systems to address low energy efficiency issues in the pump stati...
the aim of this paper is to assess the adaptation of iran’s energy policies to the kyoto protocol. in the past two decades, iran has experienced a considerable increase in greenhouse gas (ghg) emissions; in 2013 it was the world’s ninth largest emitter. although adapting to this protocol in iran’s energy and climate policies seems vital and urgent, its recent status is not promising. this paper...
Nowadays, with the development of the economy, the demand for energy is increasing rapidly while the energy supply is growing shorter and shorter. Researches indicate that energy consumption in the residential sector counts for the main parts of the total energy consumption. This paper evaluates the effect of building orientation on exposure to the solar radiation in a NESW orientated case o...
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