Full Description

This paper describes the design and economic projections for an annual storage ice system designed to cool a 100,000 square foot building with a load of 1 ton per 500 square feet of conditioned floor space or 200 ton. The storage mass, located underground, will support, a parking lot.

The basic Frozen Earth Annual Storage Ice System has been developed and tested at an Illinois University. This system has been been under development for three years and has gone through nearly two years of testing. Initial concept tests were performed on a system with a 4000 cubic foot mass, designed to provide summer air conditioning for a well-insulated home in the Midwest.

First year testing indicates that the system operates reasonably close to projections, while optimization will increase the COP substantially. Based upon this work, it has been determined that a thermal storage mass of 450,000 cubic feet containing nearly 50% water will provide a 200 ton cooling capacity for 750 full load hours per year or 150 ton-hours. With an estimated construction cost of $330,000, this system will provide seasonal savings of $51,841 and a simple payback of 3.5 years. The cost of this system is $2.20 per ton-hour of stored capacity. It was assumed that land adjacent to the building to be cooled would be available for the storage mass and that a parking lot could be located on top; therefore, no charge was made for the land nor do any of the calculated costs include parking lot expenses. Two additional designs are also included, one for a cold climate such as Duluth, Minnesota and one for a moderately warmer climate such as Springfield, Illinois.

Units: I-P

Citation: Symposium, ASHRAE Transactions, 1987, vol. 93, pt. 1, New York, NY

Product Details

Published: 1987 Number of Pages: 6File Size: 1 file , 480 KB Product Code(s): D-NY-87-21-3