Journal of Energy Science and Technology is an international, peer-reviewed open access journal dedicated to advancing research the field of energy science and technology. The journal provides a rapid publication process to ensure wide dissemination of high-quality articles to scientists, professionals, and interested individuals worldwide. Our goal is to serve as an efficient, reliable, and trusted platform for scholars and readers, publishing cutting-edge research in the field.
Abstract: The utilization of low calorific value gaseous fuels can not only avoid environmental pollution caused by emissions into the atmosphere, but also save energy and truly achieve energy conservation and environmental protection. However, it is difficult to achieve stable combustion of gaseous fuels with low calorific value with existing traditional combustion technologies. Due to the porous media combustion technology has the advantages of high combustion efficiency, wide flammability limit, large combustion regulation ratio, and low pollutant emission, the porous medium combustion technology is selected to treat and utilize low calorific value gaseous fuels. Using the porous medium test bench, the dry quenching coke oven tail gas was selected as a low calorific value gas fuel for experimental research. The dry quenching coke oven tail gas is composed of 79% N2, 10% CO2, 7% CO, 3% H2 and 1% O2, with a calorific value of about 1.2 MJ/Nm3. The effects of methane blending ratio, combustion equivalent ratio, combustion intensity and other factors on key characteristics such as flame movement and CO emission concentration were investigated. Research has found that when the combustion intensity and methane blending ratio are the same, as the equivalence ratio increases, the thickness of the flame zone shows a trend of first increasing and then decreasing, and the starting time first decreases. When the combustion equivalent ratio is 1.0, the starting time increases and then continues to decrease; When the methane blending ratio is 0, combustion cannot be maintained; The influence of methane blending ratio on the thickness of the flame core area is relatively low. As the methane blending ratio decreases, the start-up time significantly increases, and preheating will significantly reduce the start-up time; The CO emission concentration is sensitive to the change of the equivalent ratio, and the CO emission concentration is similar when the equivalent ratio is equal to 0.7 and 0.8 in each working condition, and the CO emission is the lowest among all equivalent ratios, and begins to increase sharply when it reaches 0.9. In this experiment, the NOx emission concentration was consistently below 10 ppm.Abstract: The utilization of low calorific value gaseous fuels can not only avoid environmental pollution caused by emissions into the atmosphere, but also save energy and truly achieve energy conservation and environmental protection. However, it is difficult to achieve stable combustion of gaseous fuels with low calorific value with existing traditional co...Learn More
Abstract: Under global climate change and China’s “carbon neutrality” target, optimizing power infrastructure investment is critical for promoting energy transition and sustainable development. This study systematically analyzes and compares the investments of four types of power infrastructure (thermal power, hydropower, wind power, and photovoltaics) based on the data from power projects commissioned during China’s 13th Five-Year Plan period. The research examines multiple dimensions, including differences in unit investment costs, spatial distribution characteristics, temporal evolution trends, and budget to final cost deviations, to reveal the investment characteristics and optimization strategies for different power projects. The results indicate that hydropower exhibits the highest unit investment cost, while thermal power has the lowest. The cost of photovoltaic projects has shown a significant downward trend due to technological advancements. Additionally, investment costs vary significantly across regions, influenced by resource endowments, market demand, and policy environments. The study finds that economies of scale are more evident in thermal and hydropower projects, whereas wind power projects do not demonstrate a significant reduction in unit investment costs with scale expansion due to factors such as site selection, technology, and supply chain constraints. Based on these findings, this study proposes policy recommendations, including optimizing investment scale, advancing market-oriented financing, enhancing resource utilization efficiency, and strengthening policy guidance to improve investment returns and facilitate the efficient development of power infrastructure in China’s green and low-carbon transition.Abstract: Under global climate change and China’s “carbon neutrality” target, optimizing power infrastructure investment is critical for promoting energy transition and sustainable development. This study systematically analyzes and compares the investments of four types of power infrastructure (thermal power, hydropower, wind power, and photovoltaics) based...Learn More
