English to Persian (Farsi) Science Environment & Ecology ارزشگذاری اقتصادی

Normally, the AC systems operate only for a few hours each day. The electricity consumption pattern
of the AC systems can be divided in two operating periods of daytime (peak hours) and night time (offpeak
hours) when electricity is cheaper. Cool thermal energy storage (CTES) is a technology whereby
cool energy is stored in a thermal reservoir during off-peak periods and released during periods of peak
demand [6, 7]. Consequently, the offset in electricity demand is accompanied by an improved system
performance and reduced total cost [8]. Based on the storage medium, CTES systems are categorized in
three major types: Ice Thermal Storage (ITS), Chilled Water Storage (CWS) and eutectic salt phase
change material thermal energy storage systems [9]. Many electricity providers have recognized the
potential of CTES to change electricity consumption patterns, and now offer special pricing structures as
incentives for energy users to deploy CTES systems. Several investigations and case studies about
economical effects of CTES technology and strategies are available in literature [10-12]. The use of CTES
systems in building applications can decrease energy costs and also reduce the total energy consumption
and decrease the environmental impacts [13].