Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EVALUATION OF THE THERMAL PERFORMANCE OF FORCED CONDENSERS FOR BUS AIR-CONDITIONING SYSTEMS
Submission Author:
Diogo Lôndero Da Silva , SC
Co-Authors:
Diogo Lôndero Da Silva, JEAN GOEDERT, Christian Hermes, Igor Galvao
Presenter: Diogo Lôndero Da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-0522
Abstract
Air-conditioning systems are widely used by the automotive industry to ensure the comfort of the occupants of the vehicle. However, such systems are responsible for a significant increase in fuel consumption, which is even more drastic in buses, generally used for public transportation. One of the ways to mitigate this problem is to improve the thermodynamic performance of the refrigeration system, considering different possibilities for the refrigeration cycle. For this reason, the present work has the objective of comparing the thermodynamic performance of two condensers assembly configurations typically used in air-conditioning systems of buses. The first configuration considers the two cooling system condensers connected in series, while the second one considers the condensers connected in parallel. To perform the comparative analysis, a mathematical model was developed based on the first principles laws. The mathematical model considers the geometric parameters of the condenser and operating conditions, such as the evaporator temperature, the ambient temperature, the speed of the compressor and the air flow supplied by the fans. The mathematical model was validated and presented a good agreement with the experimental measurements. The mathematical model was used to compare the two condensers and showed that the serial configuration results in a 6.5% higher condenser heat transfer rate.
Keywords
air conditioning, buses, condenser configuration, Thermal Analysis
