Experimental Investigation of a Condenser Air Humidity Effect on Superheated Degree of Compressor
Jaafar Jaber Abdulhameed†*, Muna S. Kassim†, Mohammed Salman Kadhim‡
†Mustansiriyah University, College of engineering, Iraq.
‡University of Technology, Iraq.
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Refrigerant temperature of an air-conditioning systems raises due to high compressor temperature; this is one of the most crucial problems in many hot countries. Temperature raising increases the pressure and temperature of the condenser. One of the reasons behind that is the increasing of air temperature of the condenser, causes increase the pressure-ratio of the compressor that leads to increase superheated degree of the compressor. This causes a decrease in performing cooling unit that causes raising in an energy expenditure. In current study a theoretical and experimental investment were achieves to decreases the refrigerant temperature by reducing superheated degree of the compressor. Engineering Equation solver (EES) software was used to compare the experimental data that given from experimental test rig with the theoretical one. For this purpose, several methods were used to solve the problem of raising the superheated degree of the compressor, one of them by raising the condenser air humidity ratio through adding water mist to decrease the high air-temperature of condenser problem. Air duct was designed and developed for controlling the humidity of the air enters the condenser by adding water mist to the air flow that enters the condenser. As well, a water pump with water storage tank were supplies to provide water drops to the air flow of the condenser. As a result, System Coefficient of Performance once use a water mist was found to decrease the condenser air_temperature by (12%) compared with system without any modification. Also, the decreases in superheating degree of compressor for system using water mist was found to be (8%) less than system without modification. It is recommended to use a water mist through a water nozzle to the air flow enters the condenser for reducing the superheating degree of the compressor despite of high consuming of water to reduce the condenser air temperature.