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A characteristic of any electric or thermal storage technology is that it is easy to qualitatively describe the benefits, but it is very difficult to quantify the benefit and how a storage system should be best operated since operation is both site specific and requires forecasts of future electric, heating or cooling demand. Ice storage has the advantage of being able to absorb or release heat at a constant temperature of 32 F by using the abundant mass of water as the storage medium. There is no comparable substance that is available for constant temperature storage of space heat. Thus heat storage is typically done much less effectively by sensible heating or cooling of water. Thus, storing cold is more practical than strong heat. Thus, ice for air con-ditioning has been installed at several locations and has been proposed for the expansion of the chiller capacity at Union College to meet the increased demand from two new buildings.