Investigation On Reliability Of Using Signal Processing As Refrigerant Pressure Detector

Mirun, Nur Aini (2017) Investigation On Reliability Of Using Signal Processing As Refrigerant Pressure Detector. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A good system of air conditioning depends on several factors including the suitable pressure of refrigerant in the system.These faults lead to early detection of refrigerant leakage and undercharging or overcharging. Frequently monitoring of the refrigerant charge level should lead to early detection of refrigerant leakage and avoidance of under or overcharging.Many researchers believed that compressor with different refrigerant will produce different sound.However,a change in sound may go unnoticed by human listeners due to unfamiliarity with the usual sound,or because sound may have interrupted by other sound from others machine surrounding.This research is purposely to study different signal processing technique to get the relation for the signal produce and refrigerant pressure.This study also purposely conducted to propose a new technique to monitor the pressure depending sound produce by compressor.Smartphone OPPO R1L is used as equipment devices to record sound of compressor before analyze using MATLAB software to get pattern in frequency domain.Result show that,as the amplitude range is higher will produce louder sound.For inverter type split unit if too low or too high refrigerant pressure the amplitude generate is higher than amplitude for ideal pressure.Thus,it’s produce louder sound.

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