Diseño y construcción de intercambiadores de calor (IHX) de diferentes geometrías, para su evaluación en el comportamiento del COP del sistema de aire acondicionado en un vehículo tipo Sedan.

Abstract

This research work designed different geometries of internal heat exchangers (IHX) for the construction and implementation in the air conditioning system in a vehicle type sedan to evaluate the performance coefficient (COP) of the system. The modeling was done in (CAD) computer aided design software, in which three types of models of different lengths were sketched. For the elaboration of the project had to make the selection of materials with which different (IHX) heat exchangers were constructed. The Effectiveness Method (NTU) number of transfer units was used in order to determine the most optimal design that allows improving the performance of the air conditioning system, performed the respective calculations of heat transfer. Before the implementation of the heat exchanger in the vehicle, the calculation of the (COP) was performed and test of torque, power, pollutant emission factors and fuel consumption were carried out at the Technological Transfer Center for Training and Research in Control of Vehicle Emission (CCICEV). Subsequently, the 250 mm exchanger was implemented in the vehicle to perform the calculations and tests at the CCICEV. The exchanger implementation made possible to increase the coefficient of performance (COP) by making it more efficient to the air conditioning system, and also managed to increase the route for each liter of fuel consumption. This design concluded that, the calculations made of the different heat exchangers could be appreciated that while greater area where going to occur greater heat transfer will be efficiency and total heat transfer. It is recommended before charging the refrigerant in the air conditioning system to make a vacuum in the system to remove non-condensable gases and moisture entering the system.