Department of Engineering Master's Defence: Seyedreza Hassanianmoaref

MSc in Sustainable Energy Engineering

  • 1.3.2021, 14:00 - 15:00, Háskólinn í Reykjavík

On Monday, March 01 at 14:00, Seyedreza Hassanianmoaref will be defending his 60 ECTS masters thesis project in MSc Sustainable Energy Engineering. Seyedreza performed an experimental study of inertial particles that deform turbulence in the context of loitering of blades in wind turbines.

Author: Seyedreza Hassanianmoaref

Supervisor: Ármann Gylfason, Associate Professor, Reykjavik University

Examiner: Ágúst Valfells, Department of Engineering Dean, Reykjavik University

Abstract

The global human population growth amounts to around 83 million annually or 1.1% per year. It is expected to keep growing, and estimates have put the total population at 8.6 billion by mid-2030, 9.8 billion by mid-2050, and 11.2 billion by 2100 . Due to this rapid growth, technology has developed quickly and improved, while demand for power and energy has increased.

Energy production has significant impacts on the environment, namely due to CO2 emissions. Global energy-related CO2 emissions reached about 33 Gt in 2019, following two years of increases. Recently, however, there has been a sharp decline in CO2 emissions from the power sector in advanced economies due to the expanding role of renewable sources, mainly wind and solar PV.

This generation’s main challenge is using energy resources that meet energy demand and reduce environmental impacts. Sustainable energy such as wind power, geothermal energy, hydropower energy, biofuel, nuclear energy, plays a critical role in this context. Wind power is an attractive energy resource that is developing every day, with many countries investing in wind farms. Wind turbine operations present scientists and researchers with an increased challenge to study critical factors related to service and production.

Pollutants and particles in the wind flow affect wind turbine efficiency, and this impact is reported in literature and is the topic of this project. In this thesis, the following questions related to this topic are posed: Is it necessary to know how much of the impact is due to particles in the flow? How much efficiency does the turbine lose? How can we follow this impact and find a solution to reduce the energy lost?

This thesis studies the loitering of wind turbine blades. Technical reports and literature have proven that airborne particles impact wind turbine performance. This impact is physically observed as leading-edge erosion and fouling on the turbine blades. Significant research has been done the decrease in turbine performance due to erosion; however, the erosion process and ways to predict leading edge erosion require greater examination. Stokes number has been identified as a critical component related to erosion. In this project, we present simple experiments designed to address erosion in a simple, controlled laboratory setting. The Lagrangian particle tracking (LPT) approach is employed to track the particles and their behavior around the designed simple laboratory setting. This project presents us; whatever the Stokes number is larger than the indicator leads to considerable erosion. Hence Reynolds number and Stokes number have a direct proportion to quantity of erosion, but strain rate has a inverse proportion to erosion. The literature has discussed that particle with larger Stokes number than critical value certainly has a considerable erosion. In this work, we employed LPT to count particles and check the quantity in these concepts, and it is significantly accordant. 



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