The standard was developed to provide a uniform method for evaluating the performance of cool storage systems in buildings or central plants. Systems include chillers, storage medium, storage device or vessel, heat sink equipment or heat sink systems and other auxiliary equipment.

Some cool storage system components are tested by manufacturers while others have no factory-tested components. According to Charles Dorgan, chairman of the 150P committee, all systems must be evaluated to determine if components perform as expected when matched with an existing cooling load.

"The goal of the standard is to provide a means for owners to ensure cool storage systems meet their needs, and to provide a uniform test method to prevent surprises for contractors and manufacturers of such systems," Dorgan explained.

The test method eliminates the need to develop a specific test procedure for each individual project. The standard includes a uniform method of testing, identification of test equipment, identification of data required, calculations to be used and definitions and terminology.

Drafts of ASHRAE's proposed standard are available during the public review period. To obtain electronic draft versions of the proposed Standard 150P, log on to ASHRAE online at www.ashrae.org/standards/availdft.htm. To purchase paper copies, contact ASHRAE at (800) 527-4723.