Condition based maintenance (CBM) study: to calculate data and find T-s and p-h diagram for air-conditioning system based on actual data from observation at PTAR1 / Shaiful Amrol Mohd. Arifin, Gafar Mohd. Duha and Mohd Asrul Ishak

Air conditioning is defined as 'the process of treating air' so as to control simultaneously its temperature, humidity and cleanliness to meet the requirements of the conditioned. As indicted in the definition, the important actions involved in the operation of an air conditioning system are: 1. Temperature control Room temperature is controlled to the predesigned dry bulb temperature by cooling or heating room air. 2. Humidity control Room air is controlled to the predesigned relative humidity or dehumidifying room air. 3. Air filtering, cleaning and purification Removing dust and dirt from the air cleans room. 4. Air movement and circulation Air that is controlled in temperature and humidity and cleaned is distributed throughout a room. As a result, room air can be maintained evenly in temperature and humidity conditions.