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U.S. Department of Energy
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Impact of operation and control strategy on the performance of a thermal energy storage system

Conference ·
OSTI ID:5735700
The method of operation and control of a thermal energy storage system will have significant impact on the value of the system to both the customer and the utility. The annul performance for different operating and control strategies of thermal energy storage systems can be compared by simulation analysis. In the paper, simulation of the annual performance of a thermal storage system is based on hourly cooling loads generated with a DOE2 simulation for a typical small office building. The thermal storage system is sized to meet the maximum daily load for the building. The comparable conventional system is sized to meet the typical building peak load. The operation of the thermal storage system is then modeled hour by hour. Results of the simulation analysis show that while chiller priority control achieves the desired peak load reduction, only that part of the cooling load greater than the chiller capacity is shifted to partial-peak or off-peak hours. The chiller continues to run, charging storage, through the evening hours. Application of storage priority control shifts a greater portion of the annual cooling from on-peak to partial-peak and off-peak hours. This results in greater cost savings to a utility customer on time-of-day rates.
Research Organization:
Lawrence Berkeley Lab., CA (USA)
DOE Contract Number:
AC03-76SF00098
OSTI ID:
5735700
Report Number(s):
LBL-20180; CONF-860810-13; ON: DE86011923
Country of Publication:
United States
Language:
English