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Seminar on More Electric Aircraft – including two master theses presentations

Tid: Må 2021-12-20 kl 15.00 - 15.45

Videolänk: https://kth-se.zoom.us/j/61392239273

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  • Welcome Lina Bertling Tjernberg examiner
  • Presentation “More Electric Aircraft (MEA) - Implementation of Ice Protection System (IPS) “ by Dhruv Haldar
  • Presentation “More Electric Aircraft (MEA) - Scaling Aspects and Weight Impact” by Emil Holmgren

More Electric Aircraft (MEA) - Implementation of Ice Protection System (IPS) by Dhruv Haldar

Abstract: The purpose of this Master of Science Thesis is to investigate the fuel consumption of conventional and electrical types of Ice Protection System (IPS) on passenger aircraft. The goal is to develop a tool that can assist in evaluating the fuel consumption of More Electric Aircraft (MEA) airliners of any size and flight. A previous study on a passenger aircraft comparable in size to the Airbus A320 was conducted, and this work is based in part on that study. The study provides a method for calculating the mass of ice formed when an Airbus A320 aircraft is subjected to a series of in-flight icing conditions during Climb and Descent, which include the following:

  • There is humidity due to clouds and precipitation.
  • Air temperatures lie in the freezing range of 0 to -20°C. Since icing cannot happen on a hot day, the study modifies the existing case by providing an icing air temperature of -17.15°C and an icing duration of 130.5 seconds for the Climb Case and 151.5 seconds for the Descent Case.

The methodology offers an option for automation of the simulation using IronPython programming. The end result is a computation of power and fuel consumption for Conventional and Electrothermal Ice Protection System (IPS).

More Electric Aircraft (MEA) - Scaling Aspects and Weight Impact by Emil Holmgren
Abstract: This Master of Science thesis is about investigating the differences in fuel consumption of conventional and equivalent electrical subsystems of passenger aircraft. The goal is to develop a framework that can help evaluate fuel consumption of passenger aircraft, both conventional aircraft and More Electric Aircraft (MEA), for a given size of aircraft and a given stretch of flight. This work is partly based on a similar study that has been done on a passenger aircraft with comparable size to the Airbus A320. The main difference to the prior study is the addition of subsystem weight, passenger scaling effects, environmental dependencies and flight profile, all added to increase the accuracy and diversity of the model. The fuel consumption is based on studies of existing technology for several passenger aircraft from Airbus and Boeing. The main focus was the largest secondary power consumer of an aircraft, the Environmental Control System (ECS). Numerical models of passenger aircraft were constructed in MATLAB for the ECS with different levels of electrification, a conventional ECS or a fully electric ECS. A special case with an Airbus A320 with 180 passengers doing a round trip between Copenhagen and Stockholm on a hot day was studied. The results show possible fuel savings in the magnitude of 2.5% to 4.1% when electrifying the ECS for the case studied and for aircraft with 156 to 700 passengers.