Simulation and prediction of BEV heat pumps system performance in cold climates
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Sustainable energy systems (MPSES), MSc
Publicerad
2024
Författare
Nandi, Swaroop
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The rapid evolution of the automotive sector toward electric vehicles is significantly
propelled by the technological advancements in thermal management systems. Battery
Electric Vehicles (BEVs) show a high sensitivity when it comes to temperature control.
This study focuses on one such issue regarding thermal management systems of BEV.
At lower temperature and high humidity levels, while using ambient heat for thermal
comfort, the radiator while picking up heat acts as a condenser and because of high
moister in the air there is a high probability of icing on the heat exchanger surface.
This frost formed on the heat exchanger surface will hinder the heat transfer efficiency
and thereby the thermal performance. Hence, predicting this frost formation on the heat
is indispensable. This frost is a result of different physical parameters and
thermodynamic properties that include, relative humidity, ambient temperature, coolant
temperature, airflow rate and the interaction happening between these properties. Hence
there is a need to understand these relations to predict the frost formation.
This master thesis project centers on the prediction and simulation of BEV heat pump
system performance in cold climates, particularly focusing on addressing the issue of
frosting. Hence, there's a critical need for reliable methodology to simulate and predict
its formation under varying conditions, enabling a deeper understanding of the
correlation between environmental factors and performance parameters of heat
exchanger. The methodology focuses on establishing a numerical correlation between
different frost parameters. Developing mathematical models and employing the
numerical correlations to accurately predict the onset of frost, sufficing this issue is key
in advancing BEV heat pump systems. By closing the gap between theory and practical
application, this thesis seeks to contribute to the development of a reliable and efficient
BEV heat pump systems. This research also emphasizes on vital aspect of defrosting.
Effective defrosting strategies are necessary for preserving vehicle thermal comfort and
performance.
The research follows a comprehensive approach, starting with a comprehensive
literature review of the current state of research in the field. Lastly, the simulations &
mathematical models will undergo rigorous experimental verification with an existing
experiment on Volvo Cars Corporation radiators and establishes a possible numerical
relation between frost parameters. Ultimately, the research aims to enhance the
efficiency and reliability of BEV heat pump systems through simulations and analysis,
particularly in cold climates, thereby contributing to the ongoing evolution of electric
vehicle technology.
Beskrivning
Ämne/nyckelord
Thermal management , Frosting , Defrosting , BEV heat pumps , GT-Suite