2Кафедра електротехнічних систем та енергетичного менеджменту, Кіровоградський національний технічний університет, Кіровоград, Україна *Відповідальний автор: e-mail klymvas@ukr.net, tel. +380974862754 ABSTRACT Purpose. To analyze Australian methane hydrate resources, exploration, and production, its current state and future potential.Methods. Analysis of data published in different sources concerned with geological surveys and government reports related to Australian natural gas reserves, production and consumption of gas in Australia. Analysis of theoretical and experimental research into methane hydrates properties and prevention of gas hydrate deposits formation in pipes during production and transportation of natural gas.Findings. The study of gross figures associated with the present state of gas production in Australia testified that enough gas is extracted to meet the current needs. Increase in natural gas consumption in future creates good chances for developing gas production from unconventional deposits, specifically getting methane from gas hydrates deposits. While predicting main trends in the efficient exploration and use of methane hydrates resources it is necessary to consider their possible impact on the environment.Originality. On the basis of the conducted analysis, the current state of methane hydrates research in Australia is examined. For its gas industry, it is critical to estimate their reserves and assess methane extraction from gas hydrates deposits in the near future. Practical implications.The obtained results can be used to evaluate the investment attractiveness of future exploration of methane hydrates resources in Australia.

Purpose. Determination of the potential efficiency of the alternative method of methane production from subaquatic gas hydrate deposits using the emissions of underwater mud volcanoes considering geological and thermodynamic conditions typical for the Black Sea. Methods. Computer modeling of the processes considering changing of the thermodynamic parameters of the supplying fluid within the pipeline and hydrate deposits was carried out on the basis of the Aspen Hysys program, using the Ng and Robinson model to calculate the energy potential of the fluid. Findings. An algorithm for calculating the distance to which a flow of the emissions mud volcano can be delivered with a temperature sufficient to remove sea bed hydrates from thermodynamic equilibrium and release methane has been developed. The schematic technological solution of an alternative method of methane production from gas hydrate deposits were presented by using the energy of emissions of mud volcano (fluid). The collection device for emissions of mud volcano and gas hydrate sea bed deposits were also been used within the model. The calculations have been done using Aspen Hysys computer program. Originality. The potential efficiency of the alternative method of methane production from gas hydrated sea bed deposits using thermal energy from emissions of underwater volcanoes is substantiated. It is also shown that in the case when the hydrate deposits cover the sea bed natural gas deposits as an impermeable layer, the thermal energy of the gas flow extracted from the sea bed natural gas deposits can be used for the decomposition of the hydrates This case is similar to the considered alternative method of using thermal energy of the emissions of mud volcanoes. Practical implications. The use of an alternative method of methane production from gas hydrate sea bed deposits by using emissions of mud volcano make it possible to increase the amount of gas obtained from subaquatic sources ~ by 7-10% without using additional sources of thermal energy. The practical application of this method will also prevent methane emissions from mud volcanoes into the atmosphere, which reduces pollution of seas and oceans with dissolved gases.

The production of biofuel pellets requires significant energy consumption during their production. At the primary technological stage of production: grinding of solid vegetable waste (SVW), electricity costs can be, depending on the physical and mechanical characteristics of SVW, 40… 60% of the total electricity consumed for the production of pellets. Significant losses of electric energy are observed during grinding due to uneven loading of the shredder and operation of the electric motor of its drive in constantly changing modes. This is especially true for small productions when downloading is done manually. This paper proposes a method and algorithm for determining the maximum values of the energy efficiency of the SRW grinding system for the production of biofuel pellets as a function of the load factor of the electric motor of the working machine at different values of applied voltage. As a result of research of an asynchronous electric motor with a nominal power of 4 kW SVW shredder during its operation according to the loading schedule during the eight-hour work shift provided by the farm, it was determined that control of applied voltage at variable loads will reduce energy consumption and increase the energy efficiency of the shredder by 4…6%. According to the results of research, it is proposed to develop a device for controlling the magnitude of the applied voltage at variable loads, the implementation of which will reduce energy consumption by the shredder drive. The proposed technique can also be used in the diagnosis of the electric motor of the shredder, which is in the process of operation of the technological line of production of pellets.

Розглянуто на основі газогідратної технології спосіб забезпечення працездатності газотурбінного приводу (ГТП) при наявності паливного газу, тиск якого нижче технологічно допустимого в камері згорання паливного газу ГТП. Надано схемне рішення газогідратного дотискувача паливного газу (ГДПГ) та описано принцип дії газотурбінного приводу з ГДПГ. Приведено цикл роботи ГДПГ і для конкретного складу паливного газу, його початкового тиску та тиску в камері згорання газотурбінного приводу визначено термодинамічні параметри реперних точок циклу. Ключові слова: Газогідрати-Природний газ-Утворення газогідратів-Плавлення-Теплота гідратоутворення-Газотурбінний привід-Термотрансформатор

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