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مکانیک::
سیال انتقال حرارت
• Good heat transfer between heat transfer fluid (HTF) and the storage medium
• Chemical compatibility between HTF, heat exchanger, and storage medium
Duration Seasonal Long term, in areas with wide seasonal temperature variation Weekly Mostly residential Daily Commercial buildings with high daytime and low nighttime loads Hourly Buildings with highly variable hourly loads Storage material (solid, Water Most common medium especially for HVAC applications liquid, gas, and latent) Ice High storage capacities in limited spaces Oil Mainly in solar thermal power plants where oil can be used both for storage medium and as HTF Sand and rock Cost-effective storage mediums Concrete Low cost, widely available, and can be easily shaped PCM Materials (e.g.
where cp, Tc,i, and Tc,o denote specific heat capacity, charging inlet temperature, and outlet temperature of the HTF, respectively.
where cp, Td,i, and Td,o denote specific heat capacity, discharging inlet temper- ature, and discharging outlet temperature of the HTF, respectively.
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