Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental Thermal Performance Evaluation of an Automotive Air Conditioning System
Submission Author:
Diogo Lôndero Da Silva , SC
Co-Authors:
Diogo Lôndero Da Silva, Igor Santos de Oliveira, Aline Durrer Patelli Juliani, Filipe Fischer, Guilherme Medeiros de Cordova
Presenter: Diogo Lôndero Da Silva
doi://10.26678/ABCM.COBEM2023.COB2023-1460
Abstract
Brazil is considered one of the largest passenger car producers of the world and is at the top of this ranking in South America. Among the different functional requirements related to a passenger car design, the thermal comfort stands out, especially in tropical/subtropical countries like Brazil. Despite its benefits, the operation of an air conditioning system not only increases the fuel consumption of the vehicle, but also puts the greenhouse gas emissions up. In addition, the new platform of electric vehicles (EVs), which has progressively attracted the attention of the scientific and industrial community, also presents technological challenges related to air conditioning, since its operation can reduce driving range. Therefore, the aim of this paper is to build an experimental apparatus to evaluate the energy efficiency of an automotive air conditioning system based on the first and second laws of thermodynamics. While conducting the experiments, the compressor rotational speed and the evaporator air mass flow rate were considered as independent variables. The experimental results were analyzed considering the fundamentals of thermodynamics to quantify cooling capacity, power consumption and the irreversibilities associated with each component of the air conditioning system. The results showed that the average COP of the system is reduced by increasing the compressor rotation speed or reducing the evaporator airflow. In addition, a second law analysis showed that the compressor accounts for 84% of the irreversibility in the system, while the condenser is responsible for 9%.
Keywords
Automotive Air Conditioning, experimental work, energy efficiency
