Thesis supervisor: Pál Szentannai
Location of studies (in Hungarian): Department of Energy Engineering Abbreviation of location of studies: EGR
Description of the research topic:
a) Antecedents: Fluidized beds offer several advantages over traditional energy generation methods from solid fuels, notably low NOX emission, in-process capture of SO2 and the ability to efficiently burn a wide range of low-grade, unequal quality, and potentially problematic fuels (including waste and biomass), as well as mixed fuels.
b.) Aim of research: To describe the behavior of active and passive particles in the fluidized bed. The main modeling activities include experimental, theoretical, and numerical elements. The experimental part includes own experiments together with gathering and evaluating the published experimental results. The topics to investigate include both hydrodynamical and thermodynamical descriptions of the bed, but the description of the chemical reactions would cover another topic. Not all possible parameter values should be investigated; the industrially relevant parameter ranges must be focused.
c.) Tasks, main items, necessary time: Studying the theoretical and numerical pathways of describing the particle behaviors in fluidized beds (1 year). Summarizing, evaluating, and integrating the methods for describing the mixing/segregation of active particles in fluidized beds (1 year). Modeling the heat transfer phenomena in the fluidized beds (0.5 year). Setting up and carrying out experiments for verifying those points of the own model, which cannot be verified by experiments carried out and published by others (1 year). Publication of the new scientific results (continuously). Writing the Ph.D. thesis (1 year). Attending some relevant courses (in English) on combustion theory, fluid dynamics, and energy engineering. Most of the mentioned tasks can be carried out in parallel.
d.) Required equipment: Computer, access to the scientific literature, and all the necessary laboratory equipment are readily available at the department.
e.) Expected scientific results: A new, more general semi-empirical model for describing the behavior of both bed particles and active particles in the fluidized bed.
f.) References:
P. Szentannai, J. Bozi, E. Jakab,J. Ősz, T. Szűcs: Towards the thermal utilisation of non-tyre rubbers – Macroscopic and chemical changes while approaching the process temperature, FUEL 156: pp. 148-157. (2015)
Szentannai P, Pláveczky Gy, Sándor Cs, Szűcs T, Ősz J, Renner K: A New Design Method for Fluidized Bed Conversion of Largely Heterogeneous Binary Fuels. Thermal Science 21:(2) Pp. 1105-1118. (2017)
Leckner B, Szentannai P, Winter F: Scale-up of fluidized-bed combustion -- A review. FUEL 90:(10) pp. 2951-2964. (2011)
Required language skills: english Number of students who can be accepted: 1
Deadline for application: 2020-10-01
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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