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Business Area

Thermal storage facility

energy-saving Ice Storage System

A system that uses cheap late-night power (23 to 09 o'clock) to store ice in a heat accumulator and use it to cool buildings during the day. (Daytime power usage reduction feature - demand management aspect, Partial cooling is also possible at night)

Problems of existing ice storage system and E-gen Ice Storage system a special feature
Problems of existing ice storage system E-gen Ice Storage system a special feature

- Huge of heat storage tank installation area
- Increased energy consumption due to excessive brine pump power
- Complex control systems (controlled using 3-way valves)

Heat storage tank Minimize footprint
→ 50% less than other ice storage systems

- Patent [Energy-saving ice heat storage system with separate cold storage and cooling pumps]
→Power saving of existing brine pump by separating storage cold storage and cooling pump
→ 30% less energy than other ice storage systems

-Improve the convenience of maintenance
→ Simple on/off automatic control system

Economic Efficiency of E-gen Ice Storage System
Division E-gen system Existing capsule system Coil type system
standard Power consumption (kw) standard Power consumption (kw) standard Power consumption (kw)
chillers Weekly 550 USRt 440kW 550 RT 440 kW 508 RT 446 kW
Night 424 USRt 411.5kW 424 RT 411.5 kW 424 RT 411.5 kW
Brine Thermal Storage 30 hp 22.5kW Around 5% 75 hp 56.25 kW
Equivalent to 13%
125 hp 93.75 kW
Around 21%
Heat Release 40hp 30 kW Inverter application
Total power consumption/
System COP
Weekly 492.5 kW / 3.93 496.25 kW / 3.90 539.75 kW / 3.31
Night 432.5 kW / 3.45 467.75 kW / 3.19 505.25 kW / 2.95
System power consumption 80% 90% 100%
  • Operation using temperature stratification of Antifreeze → Improving the thawing efficiency of heat storage tank by 25%
  • 30% reduction compared to the power consumption of existing brine pumps
  • Realize energy savings of E-gen ice storage systems → 15% energy saving compared to the existing absorption chiller and hot water cooling system