Project Overview

Jiangsu Tengqi Electric Power Technology Co., Ltd. (TengQi Technology, TQT) supplied customized transformer panel radiators for an Uzbekistan national grid 220kV substation project. The supply supports four SFZ-140000/220 oil-immersed transformers and includes 72 sets of PC2200(1600)-29(3)/520 panel radiators.

The project required radiator components suited to high summer temperatures, substantial day-to-night temperature variation, windblown sand, airborne dust, and elevated corrosion-protection requirements. TengQi Technology coordinated radiator design, customized connection interfaces, protective coating, manufacturing, and delivery-related technical support around the project requirements.

Project Scope at a Glance

Environmental Conditions and Project Requirements

The substation site experiences summer ambient temperatures of approximately +45°C to +50°C, along with significant diurnal temperature changes, strong winds, frequent sand exposure, and severe airborne dust. These conditions increase the importance of coordinated transformer cooling components, durable surface protection, and reliable on-site installation interfaces.

As a heat-exchange component within the transformer cooling system, the panel radiator was required to align with the transformer design and site installation conditions. The supply scope focused on radiator component compatibility and did not include complete transformers, substation primary equipment, or power-grid system integration.

Customized Panel Radiator Solution

Customized Interface Structure

TengQi Technology developed customized interface arrangements based on the transformer connection conditions and site installation requirements. Early confirmation of interface dimensions, layout, and assembly relationships supported alignment between radiator manufacturing, transformer matching, and field installation activities.

C5-Level Corrosion Protection Configuration

To address the project’s environmental protection requirements, the radiators were finished in RAL7035 with a total coating thickness of 320 μm. The specified coating system provides corrosion protection capability up to C5 level, establishing a protective barrier for metal surfaces exposed to moisture, pollutants, dust, and corrosive atmospheric conditions.

Actual corrosion resistance and service life depend on site corrosivity, transport and installation conditions, coating integrity, operating practices, maintenance, and final project acceptance requirements.

Cooling Component Support for High-Ambient-Temperature Operation

The PC2200(1600)-29(3)/520 panel radiators were manufactured in accordance with the project model and quantity requirements to support the heat-exchange needs of the four transformers. Transformer thermal performance, temperature rise, and overall operating results remain dependent on the complete transformer design, cooling-system configuration, load profile, and site operating conditions.

Implementation and Delivery Focus

1. Technical requirement alignment: Confirming transformer model, radiator specification, interface structure, coating requirements, and environmental conditions within the defined supply scope.
2. Interface coordination: Aligning radiator connection points with transformer and installation requirements to help maintain clear component matching relationships.
3. Coating process control: Applying the RAL7035 coating solution and total film-thickness control in line with the project’s C5 corrosion-protection target.
4. Manufacturing and quality verification: Integrating relevant quality-control and verification activities into batch manufacturing in accordance with applicable project technical documentation.
5. Packing and delivery coordination: Protecting radiator surfaces, connection interfaces, and finished coating during handling and transportation while coordinating batch identification and delivery requirements for the project site.

Manufacturing and Quality Control Considerations

For a batch of 72 transformer panel radiators, dimensional consistency, interface accuracy, coating quality, and manufacturing repeatability are important to project execution.

During production, attention was placed on maintaining consistency with the confirmed radiator specification and project documentation. Manufacturing control focused on key areas including radiator dimensions, connection interfaces, welded structures, surface preparation, coating application, and finished-product appearance.

For overseas transformer radiator projects, product identification, packaging protection, and delivery coordination are also important because the radiators must arrive at the destination with connection points and protective surfaces maintained in suitable condition for subsequent installation.

Key Features of the Uzbekistan 220kV Substation Radiator Project

Project Significance

This Uzbekistan national grid substation project demonstrates the importance of matching transformer radiator design not only to transformer parameters, but also to actual operating environments.

In regions with high ambient temperatures, large day-to-night temperature variations, windblown sand, and severe dust exposure, transformer cooling components require careful coordination between heat-exchange requirements, structural interfaces, corrosion protection, manufacturing quality, and transportation protection.

Through customized radiator configuration and project-specific manufacturing coordination, TQT supports transformer manufacturers and power-project customers with radiator solutions adapted to different transformer models, installation conditions, and environmental requirements.

TQT Transformer Radiator Project Support

Jiangsu Tengqi Electric Power Technology Co., Ltd. focuses on transformer radiator engineering and manufacturing for oil-immersed transformers and related power equipment.

For international projects, TQT can support radiator selection and customization based on transformer drawings, radiator dimensions, connection interfaces, cooling requirements, corrosion-protection levels, environmental conditions, and project quantities.

Typical project requirements may include ONAN and ONAF cooling applications, customized panel radiator dimensions, C3/C4/C5 corrosion-protection configurations, extreme-temperature environments, seismic requirements, and other project-specific operating conditions.