Phase Change Thermal Storage Brings Peak-Shaving Capability to Direct Expansion Cold Storage

In modern cold chain logistics, reducing electricity costs while maintaining temperature stability remains a critical challenge. While indirect refrigeration systems have long adopted thermal storage tanks to shift energy consumption to off-peak hours, direct expansion (DX) cold storage facilities often face limitations in implementing effective cold energy storage.

To address this gap, Glacier Coolant has developed a phase change thermal storage solution specifically designed for -18°C and -24°C cold rooms. By integrating high-capacity PCM storage panels into the storage chamber and combining them with optimized air circulation, cold energy can be stored during nighttime low-tariff periods and gradually released during daytime peak demand.

The system uses high-density enclosures filled with proprietary eutectic salts, enabling rapid freezing during charging cycles and stable heat absorption during discharge. In the event of power interruptions, defrost cycles, or temporary shutdowns, the stored cold energy continues to regulate chamber temperature, significantly slowing temperature rise and protecting temperature-sensitive products.

Engineering design plays a crucial role in system performance. Panel quantity, layout, airflow patterns, and structural load capacity are carefully calculated based on storage volume, insulation quality, and operational requirements. Reinforced mounting structures ensure long-term safety under heavy static loads.

As cold chain operations increasingly prioritize energy efficiency, operational resilience, and temperature security, phase change thermal storage is emerging as a practical upgrade path for direct expansion cold storage, enabling both cost optimization and enhanced storage reliability.