Hydrogen Surface Cooler | Core Cooling Equipment For High-end Hydrogen-cooled Generator Sets
Hydrogen Surface Cooler
Positioning: Core cooling equipment for high-end hydrogen-cooled generator sets
Designed specifically for large-capacity, high-power-density hydrogen-cooled generators (thermal power/nuclear power/gas turbines), it is the core heat exchange device for the stator, rotor, and core, essentially the generator's "heart air conditioner."
Operating Principle
High-temperature hydrogen gas inside the generator (carrying away heat from the windings/core) flows across the surface of the cooler fins, where it undergoes forced convection heat exchange with the closed-loop cooling water/ethylene glycol solution inside the tubes.
After cooling, the low-temperature hydrogen gas returns to the generator cavity for circulation; heat is carried away by the cooling water, achieving closed-loop airtight cooling.
Surface cooling (indirect cooling) does not contact the winding conductors, ensuring safety, reliability, and easy maintenance.
Core Structure
Heat Exchange Tube Bundle: Fins + Tubes (copper/stainless steel/titanium), enhancing hydrogen-side heat exchange, low resistance, and high efficiency.
Airtight Shell: Fully welded pressure-bearing structure, helium leak detection ≤1×10⁻⁹ Pa·m³/s, eliminating hydrogen leakage. Tube sheet and tube box: Thick plate forgings + expansion welding combination, vibration resistant and high pressure resistant (0.4–0.8MPa on the hydrogen side).
Flow guide and support: Hydrogen flow guide plate, anti-vibration bracket, suitable for long-term full-load operation.
Key advantages:
Extreme heat exchange efficiency: Hydrogen's thermal conductivity is approximately 7 times that of air, and its density is only 1/14, reducing wind friction loss by approximately 90%, significantly improving unit efficiency.
Zero leakage and high safety: Fully gas-tight design + strict helium testing avoids the risk of hydrogen explosion; no combustion hazard in a high-purity hydrogen environment.
Suitable for ultra-large capacity: Standard configuration for 600MW–1000MW thermal power, nuclear power, and F-class gas turbine units, with a penetration rate exceeding 65%.
Long life and low maintenance: No contact corrosion, vibration and fatigue resistant, design life of 30+ years, low maintenance costs.
Stable performance across a wide operating range: Adaptable to environments from -35℃ to +50℃, exhibiting uniform temperature and low thermal stress under varying loads.
Applications
Supercritical/Ultra-supercritical thermal power: 600MW/1000MW hydrogen-cooled steam turbine generators.
Nuclear power: 600MW–1200MW nuclear power unit main generators.
Heavy-duty gas turbines: F-class/H-class combined cycle units (e.g., 550MW F-class).
Large hydropower stations: Stator cooling for large-capacity hydro turbine generators.
Contact our engineering team for thermal calculations, CAD drawings, and quotation.
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