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Optimization of Ice Thermal Storage Systems Design for HVAC Systems
Abstract
Ice thermal storage is promising technology
to reduce energy costs by shifting the cooling cost
from on-peak to off-peak periods. The paper
discusses the optimal design of ice thermal storage
and its impact on energy consumption, demand, and
total energy cost. A tool for optimal ice storage
design is developed, considering the charging and
discharge times and optimal sizing of ice thermal
storage system. Detailed simulation studies using
real office building located near Orlando, FL
including utility rate structure are presented. The
study considers the effect of the ice thermal storage
on the chiller performance and the associated energy
cost and demonstrates the cost saving achieved from
optimal ice storage design. A whole building energy
simulation model is used to generate the hourly
cooling load for both design day and entire year.
Other collected variables such as condenser entering
water temperature, chilled water leaving
temperature, outdoor air dry bulb and wet bulb
temperatures are used as inputs to a chiller model
based on DOE-2 chiller model to determine the
associated cooling energy use. The results show a
significant cost energy saving can be obtained by
optimal ice storage design through using the tool
proposed in this paper.
Citation
Nassif, N.; Hall, C.; Freelnad, D. (2013). Optimization of Ice Thermal Storage Systems Design for HVAC Systems. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /151421.