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Available job

Master thesis spring 2019 (30 HP): State-space Modeling of Air Condition System in Automotive Applications

About the company

ÅF is an engineering and design company within the fields of energy, industry and infrastructure. We create sustainable solutions for the next generation through talented people and technology. We are based in Europe and our business and clients are found all over the world.

ÅF Making Future.

About the job

Automotive air condition (A/C) systems provide thermal comfort for the vehicle passengers. In general, air is supplied from outside the passenger compartment, then is filtered, cooled, dehumidified, heated and distributed into the passenger compartment in different outlets depending on ambient conditions. Current A/C systems have operational flexibility and are highly automated.

To improve the development of A/C control software, we require a dynamic model of the mass and heat transfer processes involved.The focus in this thesis work is to develop a dynamic model of a simplified air condition system that could serve as a representation of the A/C system. The A/C system is composed of a number of interconnected subsystems; compressor, condenser, evaporator and expander. The medium of the A/C cycle (refrigerant), is pressurized in a compressor, condensed in a condenser, subsequently passed through an expander and finally evaporated in a heat exchanger.

The work starts by a literature study, to obtain sufficient understanding of such a system and identification of important system requirements. Later, 1-D thermal analysis of the system is performed in GT-SUITE, the state equations of each component are extracted and a full dynamic system will be simulated in Matlab/Simulink.

The Master thesis work is carried out for Volvo Cars in collaboration with ÅF. You will be stationed at ÅF office at Grafiska vägen i Gothenburg, but in the initial week spend time at Volvo Cars in Torslanda, in the group "Climate control and CAE". You will be supervised by ÅF consultant Dr. Amir Movaghar. The work is intended to start in January 2019 and finish after 20 weeks of full time work (before the summer).

Who are you?

Preferably one student specialized in Automotive Engineering with a keen interest in simulations, or specialized in Applied Mechanics with a large interest in automotive engineering and simulation.

We offer

We are looking for someone who wants to be part of ÅF’s success story. Are you passionate about technology development? Do you like to work together to find the best solution? Then we can offer you career opportunities in a modern workplace with challenging assignments and exciting projects all over the world.

The ÅF Group is ranked as one of Sweden’s most popular employer among engineers. At ÅF you will be involved in developing innovative and sustainable solutions within infrastructure, energy and industry. We are always looking for the sharpest skills that can create a future society together with us. We hope you will learn as much from us as we will learn from you.

Contact information

Technical questions regarding the thesis: Amirreza Movaghar (

General questions regarding the CFD-group: Jan Östh (

Apply here