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Alternative Energy and Ecology (ISJAEE)

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No 3-4 (2016)
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RENEWABLE ENERGY

12-24 762
Abstract
According to measurements at meteorological stations, average annual wind speed on Sakhalin Island varies from 2 to 9 m / c. The average annual wind speed throughout Russia is in the same range. Therefore, the study of power characteristics of the wind on Sakhalin must give general wind energy properties throughout Russia. Processing of weather stations data has been carried out using the new approach. This methodology is based on the hypothesis that the wind speed at an arbitrary interval in time is a continuously differentiable function of time V ∞ (t) . It is assumed that the function V ∞ (t) is the result of such random process, when in regular intervals Т in the identical conditions this function keeps the continuity, differentiability, and has a large number of extrema, but quantitatively changes each time a little differently. Energy properties are characterized by an average wind speed and potential of wind energy. At the same time, unlike the meteorological tradition, potential of wind energy is defined as the energy of the air stream across a unit cross-sectional area at a given time interval Т . Such a definition of wind energy potential is necessary, because the performance of wind turbines in the time interval Т is determined by the value of the wind energy potential, defined for this time interval. A number of cyclic periods of time allows us to get a sample of random variables characterizing the properties of wind energy. For this sample on the base of methods of mathematical statistics the probability density function and the root mean square deviation of these random variables are determined. As a result of statistical processing of wind speed measurements at meteorological stations of Sakhalin, empirical probability density functions of random variables “average wind speed” and “annual wind energy potential” have been identified.
25-38 548
Abstract
To analyze the performance of wind turbines, it is important to define the relationship between the power of the air stream at a given value of the estimated wind speed Vp and energy that accumulates by the air jet when changing wind speed as 0 ≤ ≤ V V ∞ p . This relationship is revealed through the analysis of the function value of the cumulative  energy. This function is a definite integral with variable upper limit, which is equal to the speed Vp . At wind speed V V p = max integral of the cumulative energy takes a maximum value equal to the value of the wind energy potential. In the data analysis process of weather stations, meteorologists traditionally neglected by the small values of empirical probability density functions at high wind speeds. By the analysis of the cumulative energy function it is possible to determine the admissibility of such operation for reliability under the assessment of wind potential. As a result of statistical processing of wind speed measurements at meteorological stations of Sakhalin Island properties of empirical functions of cumulative wind power have been identified and the potential to increase the annual output of wind turbines have been determined. Modern wind turbines use a maximum of 50-70 % of the wind energy potential. Important for wind energy conclusion follows from the submissions. If the design of wind turbine is determined by the design speed of the wind Vp ≈ 20 m/s, then areas with annual wind speed VG ≤ 6 m/s the wind turbine will use up to 95% of wind power potential.
39-49 926
Abstract
This paper deals with the possibility of installing the vapor compression heat pumps’ (heat capacity less 3 MW) in order to increase the efficiency of production of heat and electrical energy for thermal power stations. All calculations were made for thermal power plant of the branch “Nevsky” JSC “TGC-1” – “Severnaya” CHP-21. The large number of sources of waste heat, such as cooling water turbine condensers, flue gas boilers, waste heat boilers, industrial water for cooling machinery, etc., is sufficient grounds to assert term use heat pumps for recycling this waste heat. 
The paper proposes the use of heat pumps for heating and feeding of their own economic need station, as well as heating the raw water before the chemical water treatment shop. The basic technical and economic parameters of stations for specific modes of operation of the stations are calculated

HYDROGEN ECONOMY

50-60 710
Abstract

The results of studies of the formation of nickel-based composites of reduced graphite oxide by various methods are presented. It is shown that the particle size of the Ni and the uniformity of their distribution are strongly dependent on the method of preparation of the composite. The developed method allows the creation of composites, containing Ni nanoparticles ranging in size from 8 to 15 nm, which are uniformly distributed on the surface of reduced graphite oxide.

61-72 667
Abstract

The article presents a study of the effectiveness of the use of distributed renewable power sources based on solar, wind and biogas power plants. The paper uses statistical data collection on weather conditions and solar radiation in different regions of the Russian Federation to assess effectiveness. It was found that the installing the solar and wind power plants in the Republic of Bashkortostan is more profitable than installing ones in other regions (Astrakhan, Vladivostok, Gorno-Altaisk, Makhachkala, St. Petersburg) and the use of biogas power plant is profitable in the region, where it is possible the production of biofuels, including the Republic of Bashkortostan. Moreover, the paper presents a high-speed design of the magnetoelectric generator for microturbines. In order to save electric power and outputting the electric energy in accordance with the graph load consumers, hydrogen batteries were examined.

ENVIRONMENTAL ASPECTS OF ENERGY

73-80 577
Abstract

The paper carries out the analysis of existing methods for assessment of anthropogenic factor effect on forest cover in mountainous zones, and presents a new method for evaluation this impact. It is noted, that the specific property of anthropogenic factor to impact both in direct and non-direct manner on condition of forests is not taken into consideration in existing models. The paper proposes the method of full accounting of anthropogenic factors affecting on forest condition both directly and via integrated parameter. Moreover, it gives the mathematical grounding of suggested method and the example of its use on the basis of results of study of forest zones condition at the south-eastern slopes of Great Caucasus. This paper shows the new approach of regression analysis of anthropogenic factor impact on ecological condition of forest zones which is a local source of energy supply of population in mountainous zones. 

81-85 670
Abstract

The paper deals with the possibility of the use of peat and sawdust as a sorbent for liquidation of emergency floods of oil products and gives the results of experimental studies of oil capacity. The experiments were conducted in accordance with the specifications. Subsequently, the authors consider a comparison of the prospects of using traditional coal saturated with oil, peat and sawdust. The results of experimental researches on determination of the main energy properties of the tested materials are discussed.

ENERGY SAVING

95-108 3232
Abstract

In this article we try to systematize the published results in the field of non-isocyanate polyurethanes (NIPUs). The main attention is paid to substitution of conventional polyurethanes cured at ambient temperatures and practically without VOC. Such materials are used mainly in the mass-production of paints, floorings and foam. Sustainable routes and other new ways of NIPU synthesize are described. Also data of hybrid compositions (HNIPUs) are provided.

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ISSN 1608-8298 (Print)