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Chiller Start/Stop Optimization for a Campus-wide Chilled Water System with a Thermal Storage Tank Under a Four-Period Electricity Rate Schedule
Abstract
The existence of a 1.4-million-gallon
chilled water thermal storage tank greatly
increases the operational flexibility of a campuswide
chilled water system under a four-part
electricity rate structure. While significant
operational savings can be expected, the
complication in the rate structure also requires
more involved control over the tank charging and
discharging processes.
A chiller start-stop optimization program
has been developed and implemented into the
Energy Management and Control System
(EMCS) to determine the number of chillers that
need to be brought on line and the start and stop
times for each chiller daily, based on the
prediction of the campus cooling load within the
coming 24 hours. With timely and accurate
weather forecasting, the actual tank charging and
discharging process closely matches the
simulation.
Citation
Zhou, J.; Wei, G.; Turner, W. D.; Deng, S.; Claridge, D.; Contreras, O. (2002). Chiller Start/Stop Optimization for a Campus-wide Chilled Water System with a Thermal Storage Tank Under a Four-Period Electricity Rate Schedule. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /5175.