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Introductory Concepts
Published in Dimitris Al. Katsaprakakis, Power Plant Synthesis, 2020
Based on the above analysis, in order to maximize the exploitation of a primary energy source, the number of intermediary energy transformations involved in the overall sequel from the primary to the final energy form should be minimized. It is then sensible, if, for example, we have to use oil for heating production (e.g., for indoor space heating), this should be used directly in a central heating burner. On the contrary, from the rational use of energy point of view, it is completely unreasonable, illogical, and uneconomical to consume the available oil in a diesel generator to produce electricity and then to consume the produced electricity in electrical resistances or heat pumps to produce the required heating. In the first case (heating production directly with an oil burner) there is only one energy transformation (combustion) from the initial chemical energy contained in oil to the final heating production, with an overall efficiency that may be higher than 85%. On the contrary, in the second case, according to Figure 1.12, there are three energy transformations involved from the initial chemical energy to the electricity production, with a total efficiency being calculated from Equation 1.18. In this efficiency, we should also take into account the electricity transportation losses from the thermal power plant to the electricity consumption destination, as well as the heating production efficiency of the electrical resistances or the heat pump. The overall efficiency in this second case for the final heating production would be around 35%.
Heating Systems and Components
Published in Herbert W. Stanford, Adam F. Spach, Analysis and Design of Heating, Ventilating, and Air-Conditioning Systems, 2019
Herbert W. Stanford, Adam F. Spach
An oil burner is defined as “a mechanical device for preparing fuel oil to combine with air under controlled conditions for combustion.” To burn oil, it is necessary to first convert the fuel from a liquid into a vapor for combustion, typically in two steps: Atomization. The liquid fuel is introduced in a fine mist (with the smallest possible droplet size) to enhance the vaporization and, then, combustion processes.Vaporization. The oil droplets are heated and change state from liquid to gas.
A Low-power Liquid-fuelled Burner Using a Novel Atomization Concept
Published in Combustion Science and Technology, 2019
Ann-Kathrin Goßmann, Thomas Müller, Johannes Kühn, Mathias Etzold, Björn Stelzner, Nikolaos Zarzalis, Franz Durst, Dimostenis Trimis
The application of a novel atomization concept for low liquid mass flowrates in a heating oil burner was studied. This atomization concept is based on secondary atomization of a chain of monodisperse droplets on a pin. Through PWM of the primary droplet generation, a wide range of spray mass flowrates was also achieved. The developed burner prototype was operated with a thermal load modulation ranging from 1.25 kW to 5.1 kW without major increases in terms of exhaust gas NOx and CO emissions. PDA measurements of the non-reacting spray around the pin showed an SMD of around 10% of the primary droplet size. Liquid properties, such as surface tension and viscosity, were found to have no influence on the SMD of the spray transported to the combustion zone. Additionally, the spray flowrate variation through PWM showed no influence on the spray SMD. Therefore, the spray quality can be assumed to be constant over the modulation range. Overall, the presented burner design is a major improvement compared with commercial heating oil burners working with pressure atomizers with respect to lower power limitation and modulation range.
Accelerated ash accumulation method for diesel particulate filter and its characterization: a review
Published in International Journal of Green Energy, 2020
Zuwei Zheng, Sheng Su, Reggie Zhan, He Lin, Yinan Wang, Xuteng Zhao
A consortium operated by Massachusetts Institute of Technology (MIT) (Sappok, Beauboeuf, and Wong 2008; Sappok, Rodriguez, and Wong 2010; Sappok et al. 2009) has developed an accelerated ash loading method using a fuel-oil burner system with oil spray injected into the flame of the burner. Their setting of accelerated ash loading system is shown in Figure 16 (Sappok, Rodriguez, and Wong 2010).