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Custom heat exchangers, end-to-end.

Every cooler we build starts with your boundary conditions and ends with commissioned hardware on site. Below are the seven application areas we serve. Each one is a starting point — bring us your specification and a thermal engineer will reply within 48 hours.

Motor & Generator Coolers

Air-water and air-air coolers for AC variable-frequency motors, hydro generators, and large industrial drives in metallurgy, mining, rolling mills, and pulp & paper.

Engineering parameters
  • — Up to 70,000 kW motor capacity
  • — 6 kV / 11 kV winding voltages
  • — Elliptical-tube design (in-service on 10,000+ wind turbines)
  • — IP55/IP65 enclosure options
Reference deployments
  • — Siemens Energy
  • — TMEIC
  • — Shanghai Electric
  • — Wolong
Motor & Generator Coolers
Factory inspection of motor coolers before shipment
Factory inspection of motor coolers before shipment

VFD Heat Exchangers

Heat exchangers integrated into variable-frequency drive cabinets for industrial drives, inverters, and power-conversion systems.

Engineering parameters
  • — Forced-air and liquid-cooled designs
  • — High duty-cycle thermal loads
  • — EMC-aware enclosure integration
Reference deployments
  • — TMEIC
  • — GE Power Conversion
VFD Heat Exchangers

Wind Turbine Coolers

Generator and converter coolers for onshore and offshore wind turbines. Salt-spray-resistant variants for marine deployment.

Engineering parameters
  • — Up to 9 MW per unit
  • — Onshore C3 / offshore C5-M corrosion class
  • — Patented elliptical-tube geometry deployed on 10,000+ machines
Reference deployments
  • — Shanghai Electric
  • — Goldwind / Changfeng (CFNE)
  • — GE Renewable
Wind Turbine Coolers

Wind Tunnel Heat Exchangers

Aerospace-grade heat exchangers for aerodynamic and automotive wind tunnels — extremely tight uniformity and pressure-loss budgets.

Engineering parameters
  • — First Chinese-domestic supplier (broke import dependency in 2008)
  • — Custom flow conditioning
  • — Subsonic to transonic operating envelopes
Reference deployments
  • — Porsche AG
  • — Tongji University
  • — AVIC
Wind Tunnel Heat Exchangers
Wind tunnel heat exchanger installation by crane at project site
Wind tunnel heat exchanger installation by crane at project site

Gas Turbine Inlet Air Coolers

Inlet-air chilling and cooling coils for gas turbine power plants in hot-climate operations. Recovers 5–10% of nameplate power lost to high ambient.

Engineering parameters
  • — Direct expansion, chilled water, and evaporative options
  • — Designed for ISO ambient + site-specific summer peak
  • — Compatible with GE, Siemens, MHI frame turbines
Reference deployments
  • — Saudi Arabia turnkey deployment (2007)
Gas Turbine Inlet Air Coolers
Air cooler installation at a Middle East power plant site
Air cooler installation at a Middle East power plant site

Industrial Air Coolers

Air-cooled heat exchangers (ACHE) for petrochemical, chemical, and process plant duties. Tube-bundle and finned-tube architectures.

Engineering parameters
  • — Forced and induced draft
  • — Galvanized, aluminum, and bi-metallic finning
  • — API 661–compatible designs available
Reference deployments
  • — BASF
  • — Sinopec
  • — Wanhua
  • — Linde
Industrial Air Coolers
Industrial air cooler manufacturing on factory floor
Industrial air cooler manufacturing on factory floor

Retrofit & Replacement

Drop-in replacement coolers for installed Siemens, GE, ABB, TMEIC, and other OEM motors and turbines. Performance-uplift retrofits for life-extension projects.

Engineering parameters
  • — Reverse-engineered fits for legacy hardware
  • — OEM cross-reference for the most common installed bases
  • — On-site dimensional verification when needed
Reference deployments
  • — Multiple confidential power-plant retrofit projects in MEA and SEA
Retrofit & Replacement
Dongrun team with completed large heat exchanger for retrofit project
Dongrun team with completed large heat exchanger for retrofit project

Bring us a problem we haven't seen.

Custom-spec heat exchangers are our default mode. A thermal engineer will reply within 48 hours.

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