As global energy efficiency demands rise, many buildings are seeking more sustainable and cost-effective cooling solutions. Among these, the ice storage chiller system stands out for its ability to “shift peak loads,” offering both economic and environmental advantages. But how can it be effectively applied to a 1,000㎡ cooling area?
How Ice Storage Chillers Work
The operating principle of an ice storage system relies on the latent heat of ice. During nighttime, when electricity prices are lower, the system freezes water to store cooling energy. During daytime, when power demand and electricity rates peak, the ice melts to release cooling, meeting the building’s temperature requirements. This strategy not only reduces operational costs but also eases the load on the power grid during peak hours.Step 1: Calculating Cooling Load Accurately
The foundation of an efficient design lies in accurate cooling load calculation. For a 1,000㎡ building, the cooling load varies depending on its function:• Office buildings: approximately 100–120W/㎡
• Commercial spaces: approximately 150–200W/㎡
Taking an office example, a 1,000㎡ space requires about 100–120kW of cooling capacity. Factors such as building orientation, insulation, internal heat sources, and occupancy levels must also be considered to ensure precise system sizing.
Step 2: Selecting the Right Ice Storage System
Once the cooling load is known, choose an ice storage chiller with slightly higher capacity than the required cooling load (e.g., 100–120kW). The type of ice storage tank is also crucial:• Ice coil tanks melt quickly and are ideal for short, high-demand periods.
• Ice ball tanks offer compact size and higher storage density.
The choice depends on the site’s available space and daily cooling patterns.
Step 3: Developing Smart Operating Strategies
Two main strategies are typically used:• Full storage mode – All cooling is generated at night and stored for daytime use. Ideal for areas with high daytime electricity costs.
• Partial storage mode – Both the chiller and ice storage system work together during the day, offering more flexibility. Operators can adjust according to real-time electricity prices and cooling loads.
Step 4: Ensuring Proper Installation and Maintenance
Reliable performance also depends on professional installation and maintenance. Piping must be tightly connected, and electrical systems safely wired. Regular inspections should check pressure, temperature, and possible leaks in the storage tanks, as well as cleaning filters to maintain system efficiency.Smart Cooling for Medium-Sized Buildings
For a 1,000㎡ building, a well-designed ice storage chiller system combines smart control, load management, and efficient operation. It not only delivers stable indoor comfort but also reduces long-term energy costs, achieving both economic and environmental benefits.