In chilling plants a refrigerant gas is used for the cooling purpose instead of water. This increases the rate and efficiency of cooling. Chilling plants can vary in construction according to the fluid that needs to be cooled.
Water Chilling Plants
The chiller is placed in a tub and welded. Connections are made so that the refrigerant passes through the tubes. The water that needs to be cooled passes through the shell and most of the tub is filled with water. Different types of refrigerants can be used such as R-22, R-407 C etc. Based on the type of the refrigeration gas used compressor is selected. The compressor pressure rises the refrigerant through the tubes. The gas while passing through the tubes cools the water which comes in contact with the copper tube surface. A air cooled condenser or a water cooled condenser is used to cool the gas from the process. After that the gas is flows to the accumulator and to the receiver. The cooled water can then be taken for the production purposes. A by pass valve is provided to loop the water within the tub
so that during idle condition there will be no loss in cooling the water. This type of plants are used in perform manufacturing industries, pharma industries, medical equipment’s manufacturing industries etc
Oil chilling Plants
In oil chilling plants a refrigerant gas is used to cool the oil instead of water. This is done so as to maintain the temperature of oil at the required level. The plant consists of a shell and tube heat exchanger, a compressor, condenser unit. Here the gas is made to pass through the tubes and the oil is made to flow through the shell. The gas while passing through the tubes cools the oil. This gives greater efficiency of heat transfer at all temperatures.