Preventive monitoring of car air conditioning system under scheduled maintenance

Khairul Anuar, Muhamad Haziq (2023) Preventive monitoring of car air conditioning system under scheduled maintenance. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The automotive air-conditioning system has long been a major source of concern in terms of maintaining air quality and providing comfort to passengers. To solve the problem, a variety of equipment has been developed, including experimental investigations. The goal of this project is to evaluate the performance of the automobile air conditioning system before and after 10,000 kilometers of maintenance using the design of experiments (DOE) method in the static instability of a car that leads to its performance. A present methodology is introduced whereby a thermometer is carried out to monitor the temperature of the air conditioner in the AC system of Perodua Myvi. In the meantime, the oil compressor analysis is studied to check the wear debris and viscosity on the oil compressor. The temperature inside the car's cabin area, as well as the oil analysis, are derived from the experimental setup. The varied surrounding temperatures have an effect on the functioning of the automotive air conditioning system, the study of the ambient inside temperature is examined in order to anticipate the proper pressure inside the system. An experimental investigation using a thermometer is also carried out to measure the panel register airflow temperature and cabin ambient temperature, which leads to a validation of the results. Measurements for the present experimental investigation were set for a period of 15 minutes. Parametric settings on the changing the receiver drier and cleaning the blower and air filter are included in servicing car AC. The data shows that the overall performance of the air conditioner system is decreasing by 14.88% after 10,000 kilometers. After that, the oil analysis of the experimental investigation is being investigated by using the viscometer and rotating disc spectrometer to validate the results of viscosity and wear debris in oil compressor analysis before and after 10,000 kilometers. The viscosity and viscosity index is taken at 40°C and 100°C. The result of the viscosity shows that its performance decreased by as much as 1.17% from 0 kilometer to 10,000 kilometers of oil compressor sample. Meanwhile, the wear debris of an oil compressor was divided into 4 chemical elements such as Aluminium, Copper, Iron and Silicon. The result of the wear debris in 0 kilometers oil sample undetectable for Aluminium, Iron and Silicon. After 10,000 kilometers the wear debris of silicon has the highest average point of 1.092. The outcome of this experiment is that after a 10,000 kilometers interval, service maintenance is unnecessary.

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