EVALUATION OF A BIOMASS COMBUSTION FURNACE USING DIFFERENT KINDS OF COMBUSTION CHAMBER CASING

This research systematically evaluates a biomass combustion furnace, focusing on the influence of varying combustion chamber casing materials. The study employs controlled laboratory experiments to investigate the impact of diffe rent casing materials on combustion performance, thermal efficiency, and practical applications such as water boiling capacity. The research uses distinct materials, including clay, steel, and aluminum, for combustion chamber casings while maintaining consistent dimensions. The central experimental apparatus, an aluminum stove, was meticulously crafted, adhering to precise measurements. Coconut shell briquettes served as the primary fuel source for this investigation. The results reveal intriguing dynamics in combustion behavior. Notably, the choice of combustion chamber casing material significantly affects fire temperature, sleeve wall temperature, thermal efficiency, and the ability to boil water. Clay emerges as a standout performer, achieving high thermal efficiency (56.8 %), substantial water boiling capacity (25 liters), and efficient fuel consumption (1.28 kg of burnt briquettes). However, steel casing materials excel in generating the highest fire temperatures (up to 557 ° C), underscoring their exceptional heat-conducting properties. Aluminum has fast temperature responses but may not retain heat like clay. The findings help optimize biomass combustion furnaces and associated applications. Material selection is crucial to attaining combustion goals like efficiency, temperature generation, or practical heat. These discoveries could lead to more efficient and ecologically friendly biomass combustion systems for sustainable energy and resource use.


Ruslan Petrash
Poltava State Agrarian University, Poltava, Ukraine ORCID: https://orcid.org/0000-0002-5812-4044 Yuliia Levchenko Poltava State Agrarian University, Poltava, Ukraine ORCID: https://orcid.org/0000-0001-7087-3681 Anton Kelemesh Poltava State Agrarian University, Poltava, Ukraine ORCID: https://orcid.org/0000-0001-9429-8570 The object of research is the technology of gas drying using a mobile block installation.The task to ensure compliance of the composition of natural gas with the values of a number of basic characteristics before its supply to main pipelines has been solved.The results of a complex analysis of the gas preparation technology of the deposit, which is loca ted in an agricultural area and is at a late stage of exploitation, are reported.It was established that in order to ensure the supply of conditioned gas to the system of main gas pipelines under the conditions of low gas pressures, the construction of gas treatment plants is required, first of all, for its drying.
The method of ensuring gas quality considered in the current paper involves the use of a block-type gas drying installation as part of a low-temperature separation installation and a source of artificial cold.As the latter, it is envisaged to use a freon-refrigerating unit.The study shows that the proposed block gas drying units can be unified for different gas productivity and are characterized by relatively low capital and operating costs.The main advantages of the introduction of gas preparation block installations and the scheme of connecting the installation to the existing line are presented.
Based on the results of the economic efficiency indicators, it was established that the use of a block gas drying unit is a profitable project with the value of the accumulated reduced free cash flow of almost 843 thousand conditional units; the investment payback period is 3 years.The results could be effectively used in the gas distribution sector, provided that the gas is extracted from a field close to exhaustion, which is characterized by low reservoir pressures.
Keywords: freon refrigeration plant, gas drying, separation, payback period, gas distribution system.This paper considers the issue related to improving the energy and resource efficiency of the process of storing raw materials of plant origin, namely, preventing self-heating of grain masses in elevator silos.It was noted that the effectiveness of the analysis of self-heating of grain mass increases with the use of mathematical models of temperature fields of grain mass during storage together with data obtained experimentally.A physical-mathematical model has been built that describes a two-dimensional localized non-stationary temperature field of seed material generated by a homogeneous rod cell with a rectangular cross-section.A technique for accelerating the convergence of the series is proposed for the constructed analytical solution, which is based on the selection and analytical calculation of the sum of the component of slow convergence.The adequacy of the physical-mathematical model has been proven by calculations and by comparing the temperature of the self-heating site, obtained theoretically, and the temperature obtained under industrial setting.The established temperature kinetics of grain mass volumes during storage, obtained experimentally and theoretically, correlate with each other in the duration range from 0 to 30 days with a correlation coefficient of at least 0.98.This proves the possibility of applying forecasts of the temperature of self-heating sites in the volume of grain mass, obtained by using the physical-mathematical model built, under industrial setting.A limitation of the study is that the model is not universal.It is another stage on the way to a universal model.A limitation of the study is that for storage periods of more than 30 days, a new excess temperature forecast must be made.
Keywords: self-heating of grain mass, temperature kinetics, model of a rod site of rectangular section.The main objective of the research study is to identify the status and analyze the problems in Chameliya hydropower plants in Nepal.In this paper, the hydropower has been studied to identify some regularities of hydropower components on proper operation and generation through primary and secondary data.Further, it been analyzed by bottlenecking through mechanical components testing for the detail study to find the actual problems.Hydropower contributes about 86 % of total internal generation to available energy in Nepal with 93 % of people having access to electricity through the national grid.Small hydropower plants (less than 30 MW) are 90 % of the installed plants contributing the major electricity demands of nearly 50 % in the country.Though hydropower is one of the major export in the past few years, it still has deficits in the dry season.Chameliya hydropower plant, 30 MW situated in the far-western part of Nepal, generates 670 MWh of energy in the wet season and which declines to 384 MWh in the dry season.Even though the plant does not have the problem of much erosion and has a sufficient flow in the dry season, the generation value is still below the design.
The issue of variation in shaft speed, misalignment of shaft bearing integrity and ultimately friction due to vibration, rises the temperature beyond the limit in the bearing Babbitt material result for failure in the plant with problematic shutdown.Thus, this research primarily focuses on the problem analysis in hydropower plants, concluding with the result that the developing countries need to have more focus on regular preventive maintenance and also schedule large maintenance on mechanical components like shafts, bearings, turbine etc. to avoid bigger damage in the long run.Hence, the study also suggests that mechanical failure in a hydropower is mostly common and therefore, a robust mechanical structure along with high safety factor components need to be encouraged where the possibilities of regular maintenance and smooth operation are reduced.Об'єктом дослідження є технологія осушки газу за допомогою мобільної блочної установки.Вирішено проблему забезпечення відповідності складу природного видобувного газу значенням ряду основних характеристик перед його подачею до магістральних трубопроводів.Представлені результати комплексного аналізу технології підготовки газу родовища, котре розташоване у сільськогосподарському районі та перебуває на пізньому етапі експлуатації.Встановлено, що для забезпечення подачі кондиційного газу в систему магістральних газопроводів за умови низьких тисків газу потрібно будівництво установок по обробці газу, в першу чергупо його осушенню.