Chiller System (HVAC)

For conditioning the air conditioning of large buildings may have been inefficient ordinary anymore. Conceivably, if using regular AC very much refrigerant to be used. Similarly, the compressor work. Therefore, it is often the system used is a Chiller system.

Chilled Water

To cool the air inside the building, chiller does not directly cool the air but cool another fluid (usually water) beforehand. Once the water is cold water then flowed through the AHU (Air Handling Unit). This is where the case of air cooling. Chiller can be made to the principle of the vapor compression refrigeration cycle or absorption system. In this paper discussed are chiller that uses vapor compression refrigeration system. Refrigeration system used in the chiller is not much different from a regular AC, but the difference is in the heat exchange system of indirect chiller cools the air. In the evaporator heat withdrawal occurs. Heat Exchanger here may be a pipe in which there are pipes. In larger pipe pipe flowing water whereas a smaller flow of refrigerant (evaporator refrigeration cycle).

In Heat Exchanger The heat exchange occurs between the refrigerant with water. Heat from the air drawn into the refrigerant so that after passing Heat exchanger water becomes colder. Cold water is then channeled to the AHU (Air Handling Unit) to cool the air. AHU Heat exchangers consisting of pipes that form the lattice in which there is an exchange of heat between the cold water with air. The cold water that has passed AHU its temperature rises because getting heat from the air. After passing through the AHU water will flow back to the Chiller (Part Evaporator) to be cooled back.

Cooling Water

As described earlier in the chiller also include refrigeration devices that are part of an interesting system of heat and wasting heat. In the case of exhaust heat often use intermediaries water chiller to medium calorific disposal. Almost the same as the Chilled water, heat exchange in the condenser chiller also through the medium of water. Water flow through the condenser. Condenser Heat exchanger is also the form in which there are plumbing pipes. Larger pipes for water flow and smaller pipes for the refrigerant flow. Heat exchangers in the heat exchange takes place where the condenser heat is taken by the water discharged. As a result, the water that has passed through the condenser will be warmer. The water then flowed into the cooling tower to be cooled with outside air. After this the water becomes colder, then circulate back to the condenser to pick up the discarded heat condenser.

So in the chiller systems described above can be used as an integrated system consisting of three cycles, namely: the refrigeration cycle (Chiller), Cycle Chilled Water and Cooling Water cycle.