Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Mathematical Model of an Automotive Air-Conditioning System under Steady-State Conditions
Submission Author:
Diogo Lôndero Da Silva , SC
Co-Authors:
Guilherme Medeiros de Cordova, Diogo Lôndero Da Silva
Presenter: Diogo Lôndero Da Silva
doi://10.26678/ABCM.COBEM2017.COB17-0367
Abstract
Brazil is among the 20 world’s largest passenger cars manufacturers and has produced 1.7 million units in 2016. One important subsystem of these vehicles is the automotive air-conditioning that is designed to improve the security and the welfare of the occupants. As the air-conditioning systems is the largest auxiliary load to vehicle engine, its operation results in an increase of the fuel consumption and greenhouse gas emissions. For these reasons, one of the obstacles of the automotive industry is to provide thermal comfort in a sustainable and energy efficient way. Due to cost and time restrictions, the mathematical modeling approach has become essential to predict the performance of automotive air-conditioning systems in the car industry. Considering this scenario, the aim of this paper is to present a mathematical model to evaluate the energy performance of automotive air-conditioning systems. The mathematical model was developed based on the conservation laws and empirical correlations. It accounts for variables such as: the environmental conditions, the compressor speed, the expansion device geometry and the heat exchangers geometry and air flow rates. The results obtained with the mathematical model can either be used to evaluate the energy performance of existing systems or support the design of new concepts.
Keywords
Automotive Air Conditioning, MAC system, mathematical model, energy performance
