نتایج جستجو برای: productivity of energy carriers
تعداد نتایج: 21247280 فیلتر نتایج به سال:
Energy hub is a concept relates various energy carriers which has been expanded in recent years. Operation of energy hub is often attended with uncertainties. Therefore, this paper presents a linear model based on information gap decision theory (IGDT) to solve the energy hub problem. This approach can consider plenty of uncertainties, simultaneously. Energy hub under study includes a combined ...
The cost reduction of green tea processing, the control of fossil fuel resources, and the curbing of corresponding greenhouse gases emission depend on the energy efficiency of tea processing units. Therefore, it is imperative to identify and analyze factors determining energy efficiency of these agro-industrial units. To this end, the present descriptive survey was carried out on 40 managers of...
to calculate partial and total productivity of production factors in broiler farms in yazd province, 72 manufacturing units were selected based on simple random sampling method and their information and statistics were collected for one production period in the second half of 2013. to measure productivity, the cobb-douglas production function was estimated using classic and fuzzy regression met...
By the recent growing of global trend for decentralized power generation via natural gas, the interest in joint operation of several energy carriers has substantially increased. The most significant concept in this regard is the "Energy Hub", which in this paper is employed to supply electrical and heat demands via electricity and natural gas carriers. Transformers, furnaces, combined...
A solar still is a viable option when the demand of potable water does not exceed more than 3 litres. Enhancement in distillate output from the solar still is a main goal of many researchers all over the world. In this research, the effect of copper and aluminium plates on distillate output is investigated experimentally as well as theoretically at different water depths under the same climate ...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
In the real world, many goods and services are practically not produced under the conditions of full competition, and most public utilities such as water, electricity, gas, and telephone are operated under monopoly conditions, among which the electricity industry has a special place regarding the price of energy carriers in the country, subsidies from the government, limitation of fossil resour...
the process of price setting in market for goods &services; along with the phenomenon of price ceiling in production factors market with distort the equilibrium & result in price gap in the economy, which in turn generates excess demand & necessitate the permanent sources of finance (subsidy) for its satisfaction, failing which may lead to budget deficit & embarrass the maintenance of policy ex...
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