Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions

Milićević, Aleksandar; Belošević, Srdjan; Crnomarković, Nenad Đ.; Tomanović, Ivan; Stojanović, Andrijana D.; Tucaković, Dragan; Deng, Lei; Che, Defu

doi:10.1016/j.ijheatmasstransfer.2021.121728

Cited by 34 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in line with efforts to improve (1) high efficiency based on solar cells with surface functionalization methods as intelligent materials [44]. (2) Increase the efficiency of combustion/co-firing of the best biomass [45]. (3) Geothermal power plant technology developed with relatively inexpensive equipment [46].…”

Section: Develop Green Conversion Technology In Various Sectorsmentioning

confidence: 53%

Energy Conversion and Conservation Technology in Facing Net Zero-Emission Conditions and Supporting National Defense

2022

View full text Add to dashboard Cite

Conversion technology is a solution that was born to solve energy problems and human needs. Without energy, all human activities ranging from households and jobs to the industry cannot work as they should, but energy conversion that uses conventional fuels will cause new issues such as climate changes. Therefore, energy conservation is very important for sustainability and energy saving. So, by reducing energy use, the pollution produced will decrease. This paper focuses on the introduction of energy conversion and conservation technology based on a qualitative literature review to deal with net-zero emission conditions. The conversion technology is environmentally friendly and efficient, and is committed to following the international Net Zero Emissions (NZE) agreement, renewable energy conversion technology and new technologies (fuel cells) to meet Indonesia's defense equipment and defense needs. Indonesia's energy use (2019) consists of oil 35%, coal 37.3%, gas 18.5%, hydropower 2.5%, geothermal 1.7%, biofuel 3%, and other renewables at nearly 2%. In 2013 Indonesia's recoverable shale resources obtained a value of 8 Billion Barrels. Because of that the total CO2 emissions resulting from energy use in Indonesia are 581 MtCO2 in 2019. Efforts to fulfil Indonesia's Nationally Determined Contribution (NDC) continue to be carried out, so that Indonesia's target is to enter a state of net-zero emission by 2060. Fuel cell technology has the potential to be applied in the Indonesian National Army, because of its relatively small size, light weight, zero-emission, high specific energy and zero-noise.

show abstract

Section: Develop Green Conversion Technology In Various Sectorsmentioning

confidence: 53%

Energy Conversion and Conservation Technology in Facing Net Zero-Emission Conditions and Supporting National Defense

2022

View full text Add to dashboard Cite

show abstract

“…The creation of a mathematical model describing all the key features of the functioning of the quality of the flow of the processes of thermal conductivity, convection, and heat exchange on various parts of the heating surfaces of boiler units is extremely important. It enables the qualitative determination of the main operating parameters that are important from the point of view of the efficiency of the use of a steam boiler and an estimate of the estimated period of its operational use (Milicevic et al 2021). In this context, the accuracy of the created model and its ability to consider all the features of the flow of the technological process is crucial.…”

Section: Resultsmentioning

confidence: 99%

The heat-transfer system modelling of the convective heating surfaces of a TP-92 steam boiler

Kravets¹,

Galyanchuk²,

Yurasova³

et al. 2022

Polityka Energetyczna – Energy Policy Journal

View full text Add to dashboard Cite

The relevance of the subject of research is determined by the need to develop and subsequently implement a mathematical model and the corresponding structural scheme of the convective heating surfaces of the TP-92 steam boiler. The purpose of this research work is to directly model the heat--transfer system of the convective heating surfaces of this boiler, designed for effective use in real conditions. The basis of the methodological approach in the research work is a combination of methods of the system analysis of the key principles of constructing mathematical models of heat-transfer systems of modern steam boilers with an experimental study of the prospects for creating a mathematical model of a heat-transfer system of the convective heating surfaces of a TP-92 steam boiler.In the course of the study, the results were obtained and presented in the form of a mathematical model of a convective heat-transfer system. It allows for making effective mathematical calculations of the main operating modes of the TP-92 steam boiler and calculating the dependences of the temperature and thermal modes of its operation on the change of incoming parameters of the used heat carriers, changes in the heating surface area and the relative flow rate of the heat carriers over the time of their use. The results obtained in the study, including the conclusions formulated on their basis, are of significant practical importance for the designers of steam boilers. The results also are useful for maintenance personnel, whose immediate responsibilities include determining the real possibilities of improving the convective heat-transfer system, based on the known parameters of the temperature of the coolant at the entrance to the system and at the exit from it.

show abstract

“…Perhaps, the main positive outcome of the co-firing model is for biomass boilers, which can be combined with low-grade coal such as lignite. As reported in [25], the combined effect of the biomass burning system and low-grade coal provides a better energy balance at reduced cost since the system uses a cheaper fuel. This demonstrates that the co-firing concept as well as the indirect burner is suitable from an economic point of view.…”

Section: Literature Review and Problem Statementmentioning

confidence: 93%

Increasing the reliability of biomass solid fuel combustion using a combined regenerative heat exchanger as an indirect burner

Ismail

Rahman

2022

EEJET

View full text Add to dashboard Cite

In this study, an indirect burner system for solid biomass fuel is designed. The design is motivated by the need to solve the problem related to a direct burner system, such as slagging and high pollutant emissions due to the high-temperature burning process. Therefore, the utilization of an indirect burner is expected to improve the reliability of the solid biomass combustion process. It also can be used to reduce coal consumption by using an indirect burner where the working fluid reaches a relatively higher temperature before entering the boiler. The design used the first principle method for creating the regenerator heat exchanger. The regenerator consists of a mantle and coil heat exchanger. The test used solid biomass fuel for the combustion process where the working fluid first enters the mantle heat exchanger and then the coil heat exchanger. As a result, the mantle absorbs sufficient heat losses from the combustion chamber with the highest temperature increment of 19 °C. The warm water from the mantle then flows to the coil arrangement within the combustion chamber. As a result, the highest temperature of the coil is 84.5 °C. The heat transfer rate for the coil and mantle is 57.2–85.6 and 124.9–141.5 W. The key finding is that the combined regenerative heat exchanger can deliver a higher transfer rate. This can be achieved since the heat exchanger utilizes the same flow distribution, increasing the mean temperature differences at the inlet. Thus, it can produce an average heat transfer rate of 210.5 W. Therefore, energy consumption for coal or other fossil fuels can be reduced significantly. The data can be used for further improvement of the existing boiler system and help to increase the thermal efficiency of the system.

show abstract

Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions

Cited by 34 publications

References 40 publications

Energy Conversion and Conservation Technology in Facing Net Zero-Emission Conditions and Supporting National Defense

Energy Conversion and Conservation Technology in Facing Net Zero-Emission Conditions and Supporting National Defense

The heat-transfer system modelling of the convective heating surfaces of a TP-92 steam boiler

Increasing the reliability of biomass solid fuel combustion using a combined regenerative heat exchanger as an indirect burner

Contact Info

Product

Resources

About