Papers by Enkhbayar Shagdar
Advanced Electrochemical Materials in Energy Conversion and Storage, 2022
Solar Energy Materials and Solar Cells, 2022
Abstract As heat storage and heat transfer medium, molten salt plays a vital role in achieving hi... more Abstract As heat storage and heat transfer medium, molten salt plays a vital role in achieving high heat transfer efficiency in concentrating solar power (CSP) plants. In this study, ternary chloride salts (NaCl–KCl–MgCl2) is considered as the base salt and the nanocomposites doped with different mass fractions of CuO are synthesized using the solution evaporation method. The thermophysical properties of the nanocomposites, including melting temperature, phase change enthalpy, specific heat, thermal diffusivity, and thermal conductivity are investigated. The experimental results indicated the melting temperature of the nanocomposites is very close to that of the base salt. The specific heat of the nanocomposite in the liquid phase region is 10.51% higher than that of the base salt when the mass fraction of CuO was 0.7%. The addition of CuO nanoparticles significantly increase the thermal diffusivity and thermal conductivity of the base salt. The thermal diffusivity and thermal conductivity of the nanocomposites are increased by 10.95–37.23% and 15.85–39.55% compared to the base salt, respectively. The nanocomposites doped with CuO nanoparticles exhibit good application prospects and excellent thermal energy storage performance for high-temperature CSP systems.
Applied Thermal Engineering, 2021
Abstract Many researchers related to the power engineering have studied different innovative appr... more Abstract Many researchers related to the power engineering have studied different innovative approaches to increase the operating performance of the power plants with regard to coal consumption and environmental impacts reduction. Solar coal hybrid power generation (SCHPG) system is one of the good approaches for improving operating performance and ecological indices in the short and midterm. The operating performance and ecological indices of 200 MW coal-fired thermal power plant could be improved by integrating a parabolic trough collector (PTC) solar field. The numerical simulation is performed using IPSEpro software based on the heat balance method in the design and off-design mode. In this paper, the first high-pressure heater (HPH-1) is replaced by PTC solar field with an aperture area of 35970 m2 in the aim of preheating the feedwater and achieving continuous and stable power generation. Simulated results show that the operating performance of SCHPG system achieved a design-point value in the summer season. Due to the DNI value and incidence angle, the low value of the operating performance occurred in the winter season. In the design-point condition, a decline in fuel consumption of 4.15 tons per hour and an increase in power output of 7.4 MW per hour are caused by fuel-saving and power-boosting operating modes. Moreover, specific equivalent coal consumption was reduced by 2.91% compared to the reference power plant. The annual reduction of coal consumption and CO2 emission was estimated at 9910 and 11,000 tons, respectively. This paper revealed that the SCHPG system can significantly contribute to the protection of the environment and the reduction of the mitigation of climate change.
Journal of Materials Chemistry A, 2021
The harmonious condition between nature and mankind experiences serious challenges due to the con... more The harmonious condition between nature and mankind experiences serious challenges due to the continuous consumption of natural resources and the consequent rapid release of CO2 concentrations into the atmosphere. It...
Applied Energy, 2020
• SAPG system exhibited higher operating performance with many ecological advantages. • Higher te... more • SAPG system exhibited higher operating performance with many ecological advantages. • Higher techno-economic indices can be obtained when the high potential steam extraction system is replaced by solar energy. • SAPG system is strongly affected by the variation of DNI compared to the power output. • The off-design regime can be reduced more fuel and CO 2 emission compared to the design regime. • SAPG system can significantly contribute to environmental pollution reduction.
RSC Advances, 2020
Integrating solar thermal energy into conventional SRM technology is a promising approach for low... more Integrating solar thermal energy into conventional SRM technology is a promising approach for low-carbon hydrogen production based on fossil fuel in near and midterm.
Science China Technological Sciences, 2020
In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovati... more In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovative approaches towards improving the techno-economic and ecological indices of the small-scale power generation system. The numerical analysis is performed using IPSEpro process simulation software based on heat balance method under four different cases. It was found that the study of Solar Assisted Power Generation (SAPG) system has important practical significance in power generation with minimum pollutants and maximum efficiency. Both fuel-saving (FS) and power-boosting (PB) operation modes of the SAPG system are considered. Various types of stand-alone solar thermal power plants exhibited very low overall efficiency with many ecological advantages compared to the conventional thermal power plant based on fossil fuels. Besides, SAPG system with FS mode presented higher techno-economic indices and operation performance. An important reduction in fuel consumption and pollutant emissions could be obtained with SAPG system. Considering the hourly, daily, monthly, and yearly amount of saved fuel and reduced pollutants in the whole power plant, the SAPG system with FS mode can largely contribute to high ecological indices power generation. A thermal efficiency increased by 1.31% with specific equivalent fuel consumption decreased by 22.54 g/kWh was obtained with SAPG system. The coal consumption was reduced by 4.75% when SAPG system operates in FS mode.
Ifost, 2013
Improvement the efficiency of power energy production, modernization of industrial process in fra... more Improvement the efficiency of power energy production, modernization of industrial process in frame of ecological and industrial safety are one of the strategic problems for any country. Mongolia is same those countries with rich natural resource of coal fuel in energy balance, where coal is occupied the largest position in it and this situation will be kept in the future. The combustion process of untreated coal had many negative effects such as climate change, air pollution, environment and nature. Since Kioto's protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of stationer and circulation fluidized bed boiler with low temperature.
Energies, 2022
Power generation using concentrating solar energy is a potential solution to provide clean, green... more Power generation using concentrating solar energy is a potential solution to provide clean, green, and sustainable power generation in the long term. The objective of this paper is to analyze the performance of a parabolic trough collector-based concentrating solar power (CSP) plant by selecting four different reference days (i.e., 22 March, 22 June, 22 September, and 22 December), representing four seasons in Mongolian climate conditions. Numerical simulation of the 50 MW CSP plant was performed, both at nominal and part-load conditions using the heat balance method considering variations of power load owing to the direct normal irradiation (DNI). The results revealed that the 50 MW CSP plant could operate well throughout the year, and it showed the highest value of operating performance for the 22 June due to the higher DNI and small solar incidence angle. The operating performance for the 22 March and 22 September is nearly similar. The lowest value of operating performance occur...
Energy
Abstract The hybridization of solar energy with a coal-fired power plant is a promising way to re... more Abstract The hybridization of solar energy with a coal-fired power plant is a promising way to reduce the numerous environmental issues related to a coal-based power generation sector. This paper examines a novel integration mechanism of solar energy into a 300 MW coal-fired power plant to improve the performance and techno-economic feasibility of the proposed system while decreasing pollutant emissions by coal consumption reduction. The concept of a novel integration mechanism includes replacing a part of the steam being used in the steam turbine of the proposed system with steam produced using the solar field installed near the power plant. The performance and techno-economic analysis of a 300 MW solar coal hybrid power generation (SCHPG) system were investigated under four different reference days (i.e. 22nd of March, 22nd of June, 22nd of September, and 22nd of December). Although the results revealed that the SCHPG system can operate well over the year, it exhibited the highest performance and techno-economic feasibility for the 22nd of June due to the higher direct normal irradiance and small incidence angle. In contrast, the lowest performance and techno-economic feasibility occurred on the 22nd of December. Besides, the performance and techno-economic feasibility for the 22nd of March and 22nd of September are almost similar.
Journal of Electrochemical Science and Technology
The electrochemical CO 2 reduction (ECR) to produce value-added fuels and chemicals using clean e... more The electrochemical CO 2 reduction (ECR) to produce value-added fuels and chemicals using clean energy sources (like solar and wind) is a promising technology to neutralize the carbon cycle and reproduce the fuels. Presently, the ECR has been the most attractive route to produce carbon-building blocks that have growing global production and high market demand. The electrochemical CO 2 reduction could be extensively implemented if it produces valuable products at those costs which are financially competitive with the present market prices. Herein, the electrochemical conversion of CO 2 obtained from flue gases of a power plant to produce diesel and formic acid using a consistent techno-economic approach is presented. The first scenario analyzed the production of diesel fuel which was formed through Fischer-Tropsch processing of CO (obtained through electroreduction of CO 2) and hydrogen, while in the second scenario, direct electrochemical CO 2 reduction to formic acid was considered. As per the base case assumptions extracted from the previous outstanding research studies, both processes weren't competitive with the existing fuel prices, indicating that high electrochemical (EC) cell capital cost was the main limiting component. The diesel fuel production was predicted as the best route for the cost-effective production of fuels under conceivable optimistic case assumptions, and the formic acid was found to be costly in terms of stored energy contents and has a facile production mechanism at those costs which are financially competitive with its bulk market price. In both processes, the liquid product cost was greatly affected by the parameters affecting the EC cell capital expenses, such as cost concerning the electrode area, faradaic efficiency, and current density.
Science China Technological Sciences, 2020
In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovati... more In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovative approaches towards improving the techno-economic and ecological indices of the small-scale power generation system. The numerical analysis is performed using IPSEpro process simulation software based on heat balance method under four different cases. It was found that the study of Solar Assisted Power Generation (SAPG) system has important practical significance in power generation with minimum pollutants and maximum efficiency. Both fuel-saving (FS) and power-boosting (PB) operation modes of the SAPG system are considered. Various types of stand-alone solar thermal power plants exhibited very low overall efficiency with many ecological advantages compared to the conventional thermal power plant based on fossil fuels. Besides, SAPG system with FS mode presented higher techno-economic indices and operation performance. An important reduction in fuel consumption and pollutant emissions could be obtained with SAPG system. Considering the hourly, daily, monthly, and yearly amount of saved fuel and reduced pollutants in the whole power plant, the SAPG system with FS mode can largely contribute to high ecological indices power generation. A thermal efficiency increased by 1.31% with specific equivalent fuel consumption decreased by 22.54 g/kWh was obtained with SAPG system. The coal consumption was reduced by 4.75% when SAPG system operates in FS mode.
Applied Energy, 2020
Integrating solar energy into conventional thermal power plant is one of the most efficient appro... more Integrating solar energy into conventional thermal power plant is one of the most efficient approaches of solar energy utilization for power generation purposes with minimum pollutants in near and midterm. In this paper, we have investigated the integration of solar energy with 300 MW coal-fired thermal power plant by replacing the first high-pressure heater (HPH#1) with parabolic trough collector type solar field. Our study aims to analyze the performance of 300 MW solar-assisted power generation (SAPG) system at different operation conditions in terms of techno-economic and ecological indices. The SAPG system is investigated for both fuel-saving (FS) and power-boosting (PB) operation modes. We have observed the reduction of 0.19 kg/kWh and 391 kJ/kWh in specific steam consumption and specific heat consumption, respectively in SAPG system. Moreover, the specific equivalent fuel consumption is decreased by 14.92 g/kWh. In SAPG system with FS mode, coal consumption is reduced by 8.82 tons per hour compared to the base case whereas, for PB mode, power output is increased by 20 MW per hour compared to the base case. The possibility of an annual reduction of coal and CO2 emission is calculated as 32,150 tons and 47,030 tons respectively when SAPG system operates at nominal load. Considering the annual amount of reduced coal and pollutant emissions in the total system, SAPG system can significantly contribute to the reduction of pollutant emissions. Furthermore, the economic analysis estimates that the simple payback period and the LCOE are approximately 5.91 years and 0.13 USD/kWh respectively in design condition.
Science China Technological Sciences, 2020
In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovati... more In this paper, the heat flow diagram of steam turbine model K-6-35 has been analyzed for innovative approaches towards improving the techno-economic and ecological indices of the small-scale power generation system. The numerical analysis is performed using IPSEpro process simulation software based on heat balance method under four different cases. It was found that the study of Solar Assisted Power Generation (SAPG) system has important practical significance in power generation with minimum pollutants and maximum efficiency. Both fuel-saving (FS) and power-boosting (PB) operation modes of the SAPG system are considered. Various types of stand-alone solar thermal power plants exhibited very low overall efficiency with many ecological advantages compared to the conventional thermal power plant based on fossil fuels. Besides, SAPG system with FS mode presented higher techno-economic indices and operation performance. An important reduction in fuel consumption and pollutant emissions could be obtained with SAPG system. Considering the hourly, daily, monthly, and yearly amount of saved fuel and reduced pollutants in the whole power plant, the SAPG system with FS mode can largely contribute to high ecological indices power generation. A thermal efficiency increased by 1.31% with specific equivalent fuel consumption decreased by 22.54 g/kWh was obtained with SAPG system. The coal consumption was reduced by 4.75% when SAPG system operates in FS mode.
RSC Advances, 2020
Regarding the trend of hydrogen-powered fuel cell engine development, hydrogen fuel is undisputed... more Regarding the trend of hydrogen-powered fuel cell engine development, hydrogen fuel is undisputedly the next generation renewable and sustainable energy carrier. The steam reforming of methane (SRM) is a field-proven technology for efficient hydrogen production. However, producing low-carbon hydrogen is the most technical challenge related to available hydrogen production technologies. This paper investigated the process analysis of SRM for low-carbon hydrogen production using concentrated solar energy as a heat source. Analysis of the solar SRM is carried out considering the reformate gas and their influencing factors. The operating temperature of 200–1000 °C and the pressure of 1.02–30 bar were considered when the mass ratio of steam-to-methane in feed gas was varied from 1.0 to 4.0. It was found that the composition of reformate gas, hydrogen yield, methane and steam conversion rate, the thermal efficiency of reforming reactor, and volume flow of reformate gas are significantly affected by the operating parameters including temperature, pressure, and the mass ratio of feed gas. Carbon content in the yield of hydrogen produced can be limited by considering the water–gas shift reaction in the SRM process. Besides, the centralized tower type solar concentrating system is selected as the heat source of the SRM process. The effect of solar radiation on the operation performance of the solar SRM process was analyzed. Direct normal irradiation is a key factor affecting the operating performance of the solar SRM process.
Abstract: Improvement the efficiency of power energy production, modernization of industrial proc... more Abstract: Improvement the efficiency of power energy production, modernization of industrial process in frame of ecological and industrial safety are one of the strategic problems for any country. Mongolia is same those countries with rich natural resource of coal fuel in energy balance, where coal is occupied the largest position in it and this situation will be kept in the future.
The combustion process of untreated coal had many negative effects such as climate change, air pollution, environment and nature. Since Kioto’s protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of circulation fluidized bed boiler with low temperature [1].
The Report on efficiency and emission test for hot water boilers of Central Heating Plant of Oyu Tolgoi mining site has been prepared by the Research and Experiment Center for Boiler (RECB) of Mongolian University of Science and Technology under the concluded contract for Services with "Oyu Tolgoi" LLC.
Demonstrated cold, firing and hot test for each hot water boilers type of SHFX7-2.0/130/70-M at minimum, medium and maximum capacity with limestone and without limestone according to approved plan of OT CHP [4].
Abstract: Improvement the efficiency of power energy production, modernization of industrial proc... more Abstract: Improvement the efficiency of power energy production, modernization of industrial process in frame of ecological and industrial safety are one of the strategic problems for any country. Mongolia is same those countries with rich natural resource of coal fuel in energy balance, where coal is occupied the largest position in it and this situation will be kept in the future. The combustion process of untreated coal had many negative effects such as climate change, air pollution, environment and nature. Since Kioto’s protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of stationer and circulation fluidized bed boiler with low temperature.
Fluidized bed combustion (FBC) technology has lot of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We tested and studied of steam boiler types DTH-11-10/350BD (Thermal plant of Zuun Haraa), НХ-35/3,82-450 (Uhaa Hudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).
The 8th International Forum on Strategic Technology 2013, Proceedings Volume II., Jul 6, 2013
Abstract—Improvement the efficiency of power energy production, modernization of industrial proce... more Abstract—Improvement the efficiency of power energy production, modernization of industrial process in frame of ecological and industrial safety are one of the strategicproblems for any country. Mongolia issame those countries with rich natural resource of coal fuel in energy balance, where coal is occupied the largest position in it and this situation will be kept in the future. The combustion process of untreated coal had many negative effects such as climatechange, air pollution, environment and nature. Since Kioto’s protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of stationer and circulation fluidized bed boiler with low temperature.
Fluidized bed combustion (FBC) technology has many of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We were testingand studing of steam boiler type DTH-11-10/350BD (Thermal plant of ZuunHaraa), НХ-35/3,82-450 (UhaaHudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).
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Papers by Enkhbayar Shagdar
The combustion process of untreated coal had many negative effects such as climate change, air pollution, environment and nature. Since Kioto’s protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of circulation fluidized bed boiler with low temperature [1].
The Report on efficiency and emission test for hot water boilers of Central Heating Plant of Oyu Tolgoi mining site has been prepared by the Research and Experiment Center for Boiler (RECB) of Mongolian University of Science and Technology under the concluded contract for Services with "Oyu Tolgoi" LLC.
Demonstrated cold, firing and hot test for each hot water boilers type of SHFX7-2.0/130/70-M at minimum, medium and maximum capacity with limestone and without limestone according to approved plan of OT CHP [4].
Fluidized bed combustion (FBC) technology has lot of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We tested and studied of steam boiler types DTH-11-10/350BD (Thermal plant of Zuun Haraa), НХ-35/3,82-450 (Uhaa Hudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).
Fluidized bed combustion (FBC) technology has many of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We were testingand studing of steam boiler type DTH-11-10/350BD (Thermal plant of ZuunHaraa), НХ-35/3,82-450 (UhaaHudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).
The combustion process of untreated coal had many negative effects such as climate change, air pollution, environment and nature. Since Kioto’s protocol has been implemented the requirements on developing ecologically harmless for coal combustion. According to this situation humanity faced actual problems. One of the way to avoid from these problems is developing technology of circulation fluidized bed boiler with low temperature [1].
The Report on efficiency and emission test for hot water boilers of Central Heating Plant of Oyu Tolgoi mining site has been prepared by the Research and Experiment Center for Boiler (RECB) of Mongolian University of Science and Technology under the concluded contract for Services with "Oyu Tolgoi" LLC.
Demonstrated cold, firing and hot test for each hot water boilers type of SHFX7-2.0/130/70-M at minimum, medium and maximum capacity with limestone and without limestone according to approved plan of OT CHP [4].
Fluidized bed combustion (FBC) technology has lot of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We tested and studied of steam boiler types DTH-11-10/350BD (Thermal plant of Zuun Haraa), НХ-35/3,82-450 (Uhaa Hudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).
Fluidized bed combustion (FBC) technology has many of advantage for burning solid fuels and recovering energy to produce steam. So we decide to confirm advantage of fluidized bed combustion technology by testing of our country's stationer and circulating fluidized bed steam generators.
The overall objective of the test is determining efficiency of stationery and circulation fluidized bed steam boilers with small and medium capacity in the thermal power plant of Mongolia. We were testingand studing of steam boiler type DTH-11-10/350BD (Thermal plant of ZuunHaraa), НХ-35/3,82-450 (UhaaHudag Thermal Power Plant) and BKZ-75-39 (Darkhan Power Plant).