Industry Pain Points & Needs

1. Immense Energy Consumption: Rail transit hubs typically rank among a city’s largest energy consumers. HVAC systems account for over 40% of the total energy consumption at airports and subway stations; consequently, energy conservation translates directly into increased profits.

2. Extreme Load Fluctuations: The cooling load at airports and stations fluctuates in real-time, driven by flight/train schedules and passenger density. Traditional refrigeration units experience a significant drop in efficiency under low-load conditions and are prone to surging.

3. Space Constraints: Particularly within subway stations, underground equipment room space is extremely scarce; therefore, equipment must be more compact and possess a higher power density.

Application Scenarios & Solutions

Scenario 1: Subway Stations

Solution: Deploy compact magnetic-levitation (maglev) chillers designed to fit within the limited mechanical room spaces of subway stations. While ensuring reliable long-term operation in humid environments, these units simultaneously reduce the required footprint by 20% to 30%.

Why Maglev: Subway station environments are characterized by high humidity, which accelerates mechanical wear. Maglev bearings, being friction-free, offer a significantly longer service life. Furthermore, by eliminating the need for complex oil-circulation systems, the physical size of the chiller unit can be reduced by 20% to 30%, making it perfectly suited for the compact spaces typical of underground facilities.

Scenario 2: Airport Terminals

Solution: A cluster of high-capacity magnetic-bearing centrifugal chillers was deployed to accommodate the wide dynamic load range of the terminal facilities, ensuring maximum operational efficiency across all hours—from the low-demand troughs of late night to the peak loads of midday.

Why Maglev: The terminal building features a vast interior space, with cooling requirements shifting dramatically from extremely low loads late at night to full-capacity loads during the day. Magnetic-bearing compressors maintain high efficiency across a load range of 10% to 100%, thereby eliminating the energy waste typically associated with the frequent start-stop cycles of traditional centrifugal chillers.

Scenario 3: High-Speed Railway Stations

Solution: Deploy modular magnetic-bearing chiller units or air-cooled magnetic-bearing chillers to rapidly respond to fluctuations in thermal load beneath the expansive roofs of railway stations.

Why Maglev: High-speed railway stations typically feature large-span metal roofs, which generate significant thermal radiation and demand a rapid response from the cooling system. Magnetic-bearing chiller units feature rapid soft-start capabilities, enabling them to respond to load variations within an extremely short timeframe and maintain a comfortable environment within the waiting halls.

The Value of Magnetic Bearing Compressors for Rail Transit Clients

Due to their extended operating hours—typically ranging from 18 to 24 hours—rail transit clients realize an exceptionally rapid return on investment（RIO）.

Energy Savings: Compared to traditional units, the comprehensive electricity savings rate typically ranges from 35% to 50%. For a large-scale airport, the annual savings on electricity costs can amount to millions of yuan.

Reduced Maintenance Costs: The oil-free system reduces annual maintenance expenses by approximately 80%. Furthermore, the elimination of waste lubricant disposal requirements aligns with “Green Transit” evaluation standards.