What is expansion tank in chilled water system?

Expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. The expansion tank uses compressed air to maintain system pressures by accepting and expelling the changing volume of water as it heats and cools.Click to see full answer. Also to know is, what is air separator in chilled water system?Air Separator is used to remove dissolved air/gases or micro bubbles from closed or open hydronic, HVAC, boiler other water / fluid systems. In the process it separates undissolved impurities as well.Also Know, where should an expansion tank be located? Contrary to this common practice, the expansion tank can be installed in the cold-water line. It should be located in the largest pipe closest to the incoming main after a pressurereducing valve. Install an isolation valve near the expansion tank so that the tank can be serviced when needed. Subsequently, question is, how do you size a chilled water expansion tank? As the chilled water pressure increases above 14.7 psia, the chilled water will flow into the expansion tank. On the other hand, say the bladder/diaphragm is pressurized to 25 psig, then chilled water will only enter the tank when the chilled water exceeds 25 psig.What is the function of an expansion tank in a diesel engine cooling system?The expansion tank absorbs excess coolant and minimizes excess pressure in the engine cooling system. An expansion tank helps maintain a minimal pressure increase during heated water expansion, helps reduce coolant hammer, and helps protect the engine cooling system from stress.