Improving the Performance of Air-Cooled VRF Air-Conditioners

Abstract

Due to the global warming problem that the whole world is facing, the demand for air conditioning systems in various businesses has also increased. Thailand is another country that has a high demand for air conditioning systems because it is a country with a hot and humid climate and is also influenced by global warming. Therefore, the need for air conditioning systems has increased, both in the industrial sector and various types of business buildings. Air conditioning systems are required for service and production. In addition to the increasing demand for air conditioning systems, hotter weather also reduces the efficiency of air conditioning systems, wasting energy and contributing to global warming.

Based on the information mentioned above. It was found that air temperature is an important factor in the performance and energy consumption of air conditioning systems. One of the sample buildings in Thailand uses a variable liquid air conditioning system, but the air conditioner is installed in a location with poor circulation and air circulation. As a result, the air temperature in this area is higher than normal air, so the variable solution air conditioner has to work hard and the efficiency and performance of air conditioning decrease.

Therefore, this research focuses on studying and finding ways to increase the performance of the air conditioning system of the sample building where the air-cooled variable air conditioning system is used and installed in inappropriate areas. By simulating the reduction of the air temperature used for cooling. This is based on the air intake from outside the building with a temperature lower than the air-conditioning area at the same time, referring to the performance and efficiency values ​​from the manufacturer. The results of the study found that the sample building has the potential to reduce the air temperature used for cooling by an average of 5.8 °C and can increase the efficiency in terms of electrical power per ton of cooling (CHP) for the air conditioning system by up to 18.1%.