From magnetic bearing centrifugal chillers to data center liquid cooling, from high-efficiency chiller plants to low-GWP refrigerant transition — a single exhibition lays out the complete technology roadmap for international buyers.
Why This Exhibition Matters
The global commercial HVAC market, valued at nearly $98.8 billion for chiller equipment alone in 2023, is undergoing a triple transformation: the phase-down of high-GWP refrigerants mandated by the Kigali Amendment, the exponential growth in data center cooling demand driven by AI workloads, and the rising expectation that buildings should be net-zero energy or close to it. Navigating these transitions requires a supplier with depth across multiple technology platforms — not just one product line.
At MBT 2026, Midea Building Technologies presented what is arguably the most comprehensive water-side product portfolio in the industry — spanning magnetic bearing centrifugal chillers, gear-driven centrifugal chillers, variable-frequency direct-drive centrifugal chillers, air-cooled magnetic bearing chillers, data center liquid cooling systems, high-efficiency chiller plant solutions, and high-temperature heat pumps. For international buyers, engineers, and investors, this exhibition provided a single point of reference for evaluating the state of the art in commercial water-side HVAC technology.
Water-Cooled Magnetic Bearing Chiller: The Flagship
The centerpiece of the exhibition was the new-generation EV(X)/HV(X) series of water-cooled magnetic bearing centrifugal chillers, representing Midea's most advanced compressor technology to date.
Capacity Range and Modularity
The product line spans from 130 RT compact units up to 800 RT per compressor head. For large-scale applications, up to four compressor heads can be combined in a single installation, delivering a maximum capacity of 3,200 RT with built-in redundancy — if one head requires maintenance, the remaining three continue operation, maintaining partial cooling capacity.
For mid-range applications (230-300 RT), the integrated single-compressor design achieves IP67 protection rating for the compressor module — waterproof, dustproof, and corrosion-resistant — while remaining compact enough to fit through a standard freight elevator. Up to 16 modular units can be combined for large installations, providing N+1 redundancy without the footprint of traditional oversized single-machine designs.
Efficiency Performance
The EV(X)/HV(X) series achieves full dual first-class energy efficiency certification, with COP values reaching up to 7.41 and IPLV values up to 10.20. These numbers place the series at the top tier of the global magnetic bearing chiller market, competitive with the best offerings from established players.
The efficiency gains come from multiple technology layers:
• Self-developed magnetic bearing compressor: The magnetic bearing system achieves static levitation precision of 0.5 μm, with bearing power consumption as low as 0.16 kW — only 2-10% of traditional oil-bearing systems. The oil-free operation eliminates oil system maintenance entirely.
• Permanent magnet synchronous motor: Motor efficiency of 0.97 or higher, with integrated variable frequency drive and internal refrigerant cooling, reducing motor volume while maintaining thermal performance.
• Two-stage opposed compression: The back-to-back impeller design cancels axial thrust to 10% of conventional single-stage designs, reducing bearing loads and mechanical losses. Combined with inter-stage economizer vapor injection, the compression process improves efficiency by approximately 6% over single-stage compression.
• Advanced heat exchanger technology: New tooth-profile enhanced heat transfer tubes achieve 47-100% improvement in heat transfer coefficients compared to conventional designs, using falling-film evaporation to minimize refrigerant charge volume.
Reliability and Safety
The magnetic bearing system has been validated through 300 full-speed hard drop tests and 500 consecutive anti-surge tests — exceeding industry norms. In the event of power failure, the self-generation mode allows the spinning rotor to power the magnetic bearings during controlled deceleration, maintaining levitation at speeds above 900 RPM until safe contact with backup mechanical bearings.
The design life target is 30 years for the core compressor components, with extended warranty coverage on critical magnetic bearing parts.
Low-GWP Refrigerant Compatibility
The water-cooled magnetic bearing platform supports R134a (GWP 1,430) as the standard refrigerant, with R513A (GWP 631) available as a low-GWP alternative. The product roadmap includes R1234ze(E) (GWP <1) variants under the "Pro" designation, targeting markets with stringent F-gas regulations such as the European Union.
Air-Cooled Magnetic Bearing Chiller: AirBoost VERA
The AirBoost VERA represents Midea's entry into the air-cooled magnetic bearing chiller segment — a market segment growing rapidly in data center applications where water availability, treatment costs, or site constraints favor air-cooled solutions.
Key Specifications
• Cooling capacity: 160-640 RT (integrated single-unit configuration), with 1-4 compressors per unit
• COP: >5.4 (at AHRI conditions: inlet/outlet water temperature 25/31°C, ambient 35°C)
• NPLV (AHRI): 11.0
• Refrigerants: R134a, R513A, R1234ze(E)
• Capacity control: Variable frequency drive + inlet guide vane, 10-100% range
• Operating range: Ambient temperature -40°C to 46°C standard; continuous operation up to 55°C
• Water outlet temperature: 7-36°C standard, with ±0.1°C precision across the full range
• Noise level: As low as 75 dB(A) with standard compressor sound enclosure
Design Differentiators
The AirBoost VERA adopts a multi-V air-side heat exchanger configuration with hydrophilic aluminum fin technology and EC fans for full variable frequency air-side control. The two-stage back-to-back compression design, shared with the water-cooled platform, cancels axial thrust and reduces mechanical losses by 6% compared to single-stage compression.
The active bearing control system scans position 400,000 times per second with 0.5 μm control precision, implementing proactive vibration compensation that reduces both vibration transmission and radiated noise.
Fast-start capability is a notable feature: the compressor reaches full operating speed within 30 seconds, 80% load within 80 seconds, and full load within 100 seconds — critical for data center cooling applications where cooling must be restored immediately after a power interruption.
Gear-Driven Centrifugal Chiller: The Workhorse
The gear-driven centrifugal chiller line covers 500-3,000 RT, representing the high-capacity workhorse for district cooling, large commercial buildings, and industrial process cooling applications.
Dual-Stage Compression Technology
The highlight of the gear-driven platform is the dual-stage compression with inter-stage economizer. The compressor achieves isentropic efficiency of up to 88.2%, driven by several aerodynamic innovations:
• Pre-swirl guide vane technology: Dual-variable control (flow and temperature) improves part-load efficiency by 10-20% and expands the operating range to 10-100% capacity.
• Three-element high-efficiency impeller: Self-developed aerodynamic design software, manufactured from aerospace-grade aluminum alloy on five-axis CNC machining centers.
• Full-flow-path optimization: The volute casing is designed in conjunction with the impeller using CFD analysis, maximizing flow uniformity. A tandem cascade deswirl vane design reduces aerodynamic noise.
• 360° annular vapor injection: The inter-stage economizer with adjustable vapor injection valve improves part-load COP by 5% while reducing minimum capacity by 3% compared to fixed-injection designs.
Reliability Features
The gear-driven platform uses carbonitrided and ground high-strength gears with special profile modifications for optimal load distribution, paired with specially designed high-speed bearings. The double-Venturi oil return system operates automatically across all load conditions, eliminating the need for manual oil return maintenance.
Noise performance is a strength of the dual-stage design: maximum rotor speed does not exceed 7,500 RPM — 40% lower than single-stage centrifugal compressors at equivalent capacity — resulting in vibration amplitude of ≤0.03mm throughout the lifecycle.
IDC Liquid Cooling: Meeting the AI Infrastructure Wave
The exhibition showcased Midea's complete liquid cooling product matrix for data center applications, reflecting the industry's shift toward direct-chip and immersion cooling for high-density AI compute workloads.
The Cooling Challenge
The latest GPU chips (such as NVIDIA's GB200 series) exceed 900W TDP per chip, with projections reaching 2,700W. Single cabinet power now exceeds 20kW for GPU-based configurations, making liquid cooling mandatory for large-scale data centers. In a typical GB200 NVL72 cabinet, liquid cooling accounts for approximately 90% of the total cooling capacity (120-132 kW per cabinet).
Product Portfolio
• Dry coolers (350-1,400 kW modular series): Air-side heat rejection units with modular V-type heat exchangers, optional dual spray systems for 20% efficiency improvement, designed for 30% ethylene/propylene glycol solution.
• Water-cooled chillers: The full range of centrifugal chillers (gear-driven 500-3,000 RT, magnetic bearing 130-3,200 RT, direct-drive 250-2,200 RT) serves as the primary cooling source for large data center chilled water plants.
• Air-cooled magnetic bearing chillers: The AirBoost VERA series (160-640 RT) provides an alternative for sites where water-cooled systems are impractical.
• CDU (Cooling Distribution Unit): Ranging from 305 kW to 2,600 kW capacity, with intelligent predictive control maintaining water temperature fluctuation below 0.5°C. The 2,600 kW unit features an approach temperature (ATD) as low as 3°C, redundant component design supporting hot-swap maintenance, and 1,700+ individual component tests with 20,000+ hours of cumulative testing.
• Fan walls (250-450 kW): Modular chilled water fan walls with no-floor design, reducing initial data center investment by 10%. Medium-to-high temperature fan wall variants increase natural cooling utilization from 10% to 28%.
System-Level Approach
Midea's strategy emphasizes a complete cold-chain solution: from the outdoor dry cooler or chiller (primary side), through the CDU (heat exchange interface), to the cold plate or fan wall at the server rack (secondary side). This integrated approach ensures compatibility across all temperature levels and simplifies commissioning for data center operators.
High-Efficiency Chiller Plant: Beyond the Machine
The exhibition highlighted that individual chiller efficiency, while important, represents only part of the energy equation. The chiller plant — the integrated system of chillers, pumps, cooling towers, piping, and controls — determines the actual energy consumed per unit of cooling delivered.
System Performance Benchmarks
The high-efficiency chiller plant solution targets an annual average system COP of 5.0-6.0, compared to 3.0-4.0 for conventional plants. The approach involves four pillars:
1. High-efficiency chillers: Full-condition variable-frequency centrifugal or screw compressors, selected not just for peak efficiency but for optimal performance across the actual load profile and ambient conditions of the specific installation.
2. Optimized fluid distribution: Low-head, high-efficiency pumps with optimized piping design (achieving 20-25m chilled water head and 16-18m cooling water head), reducing pumping energy by 30-50% compared to conventional designs.
3. Adaptive cooling towers: Variable-flow cooling towers with low approach temperature design, fan VFD control based on wet-bullet temperature and approach, and independent air path isolation to prevent cross-flow between modules.
4. Intelligent control system: A plant-level optimization system that continuously adjusts chiller loading, pump speeds, and tower fan speeds to minimize total plant power consumption at every operating point.
Economic Case
For a 1,000 RT installation, the high-efficiency chiller plant solution requires an incremental investment of approximately 3,300-3,800 RMB per RT (compared to 2,600-2,800 RMB per RT for conventional plants), but delivers annual energy savings of approximately 650,000 RMB per 1,000 RT — yielding a payback period of approximately 2-3 years depending on operating hours.
High-Temperature Heat Pumps: Decarbonizing Process Heat
The exhibition included Midea's high-temperature air-to-water (ATW) heat pump platform, targeting industrial process heat and district heating applications that have traditionally relied on gas or electric resistance heating.
Technical Capabilities
• Output temperature range: 60-80°C, covering the majority of commercial and industrial hot water needs
• EVI (Enhanced Vapor Injection) compressor: Enables stable heating operation at low ambient temperatures, with capacity range of 50-140 kW in modular configurations
• Low-GWP refrigerants: R32 (GWP 675) and R290 (GWP 3) options, compliant with emerging F-gas regulations
• Modular design: Seamless combination of multiple units for larger installations
The heat pump platform extends Midea's technology reach beyond cooling into the heating domain, addressing the growing market for electrification of heating in commercial buildings, agriculture (livestock, aquaculture), food processing, and light industrial applications.
The Strategic Picture: What This Means for International Buyers
For procurement teams, consulting engineers, and project developers evaluating HVAC suppliers for international projects, the breadth of Midea's 2026 product portfolio sends several signals:
Technology self-sufficiency: From compressor aerodynamics to magnetic bearing control algorithms to system-level optimization software, the portfolio demonstrates in-house capability across the full technology stack — reducing dependency on third-party suppliers and enabling integrated design optimization.
Regulatory readiness: The product line already supports low-GWP refrigerants (R513A, R1234ze(E), R32, R290) across multiple platforms, positioning buyers for compliance with F-gas phase-down regulations in the EU, Kigali Amendment commitments globally, and emerging refrigerant regulations in the Middle East and Asia-Pacific.
Lifecycle cost focus: The combination of magnetic bearing oil-free compressors (eliminating oil system maintenance), 30-year design life targets, digital remote monitoring capabilities, and high-efficiency plant-level optimization addresses the total cost of ownership — the metric that matters most to sophisticated buyers.
Data center readiness: With the data center cooling market projected to reach $38 billion by 2030, the complete liquid cooling portfolio — from chillers to CDU to fan walls — positions Midea as a full-solution supplier for the AI infrastructure buildout, competing directly with established IDC thermal management specialists.
Conclusion
The MBT 2026 exhibition was not a product launch — it was a capability declaration. By presenting the full water-side technology matrix in a single venue, Midea demonstrated the depth and breadth needed to serve as a primary HVAC partner for international projects of any scale or complexity.
For buyers navigating the intersecting demands of efficiency, sustainability, digitalization, and data center cooling, the message is clear: the technology is ready. The question is no longer whether Chinese HVAC manufacturers can compete on technology — it is whether the market will respond to the value proposition of integrated, full-spectrum solutions backed by global service infrastructure.
Frequently Asked Questions
What is a magnetic bearing chiller and how does it differ from a traditional centrifugal chiller?
A magnetic bearing chiller uses magnetic levitation technology to suspend the compressor rotor, eliminating physical contact and oil lubrication entirely. Compared to traditional oil-bearing centrifugal chillers, magnetic bearing chillers achieve bearing power consumption as low as 0.16 kW (only 2-10% of conventional systems), zero oil system maintenance, and COP values up to 7.41. The oil-free design also extends compressor design life to 30 years and reduces vibration throughout the lifecycle.
What are the key specifications of Midea's water-cooled magnetic bearing chiller at MBT 2026?
The EV(X)/HV(X) series spans 130 to 800 RT per compressor head, with up to four heads combinable for 3,200 RT total. It achieves COP up to 7.41 and IPLV up to 10.20, earning dual first-class energy efficiency certification. The system uses a self-developed magnetic bearing compressor with 0.5 μm levitation precision, supports R134a and R513A refrigerants, and has a 30-year design life target for core components.
Why are low-GWP refrigerants becoming important for centrifugal chillers?
The Kigali Amendment mandates a global phase-down of high-GWP refrigerants, and the EU's F-gas regulations are even more stringent. Midea's magnetic bearing chillers already support R513A (GWP 631, a 56% reduction vs. R134a) and offer R1234ze(E) (GWP <1) variants for regulated markets. Choosing a chiller with low-GWP refrigerant compatibility ensures regulatory compliance, avoids future retrofit costs, and aligns with corporate ESG commitments.
How does Midea's data center liquid cooling solution address high-density AI workloads?
Midea provides a complete cold-chain solution for data centers: dry coolers (350-1,400 kW), full-range centrifugal chillers (up to 3,200 RT), air-cooled magnetic bearing chillers (160-640 RT), CDU units (305-2,600 kW), and modular fan walls (250-450 kW). The CDU maintains water temperature fluctuation below 0.5°C with approach temperature as low as 3°C. This integrated portfolio covers both the primary cooling loop and the secondary distribution side, supporting direct-chip and immersion cooling for GPU configurations exceeding 900W TDP per chip.
What should international buyers consider when selecting a high-efficiency chiller plant?
Key factors include: (1) total system COP target — aim for 5.0-6.0 annually, not just peak chiller efficiency; (2) actual load profile matching — select chillers optimized for your specific part-load conditions and ambient temperatures; (3) lifecycle cost — magnetic bearing oil-free compressors eliminate oil maintenance and a high-efficiency chiller plant pays back incremental investment in 2-3 years through approximately 650,000 RMB annual energy savings per 1,000 RT; (4) low-GWP refrigerant readiness for future compliance; and (5) integrated control systems for continuous plant-level optimization.
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