Project Location: Philippines
Product: Transformer Finned Radiators
Transformer Rating: 20 MVA
Voltage: 110 kV
Cooling System: ONAN / ONAF
Application: Outdoor Power Substation
A power infrastructure project in the Philippines required a reliable cooling solution for a 110kV, 20MVA oil-immersed power transformer.
The transformer was designed for outdoor operation in a tropical environment. High temperatures, high humidity, heavy rainfall, coastal exposure and seasonal typhoons can place additional demands on transformer cooling equipment and protective coatings.
The customer required a transformer radiator system capable of providing stable heat dissipation under high ambient temperatures while maintaining reliable oil tightness, corrosion resistance and long-term outdoor performance.
Based on the transformer specifications and project requirements, we provided a customized finned transformer radiator solution for the project.
The Philippines has a tropical maritime climate characterized by high temperatures, high humidity and frequent rainfall.
For outdoor power transformers, these environmental conditions can directly affect cooling performance, corrosion protection and equipment maintenance.
High ambient temperatures reduce the temperature difference between the radiator surface and surrounding air.
At the same time, high humidity can accelerate corrosion of exposed steel surfaces.
The radiator therefore needs sufficient heat-transfer area and an appropriate surface-protection system.
Many areas of the Philippines experience significant seasonal rainfall.
Repeated exposure to rain and moisture can increase the risk of surface corrosion if the coating system is not properly selected and maintained.
The radiator therefore requires suitable outdoor corrosion protection.
As an island country, many Philippine substations and industrial facilities are located near coastal areas.
Salt-laden air can accelerate corrosion of exposed metal components.
For projects located in coastal or marine environments, an enhanced anti-corrosion coating system can be specified.
The Philippines is exposed to tropical storms and typhoons.
Outdoor transformer equipment therefore needs suitable mechanical strength and reliable mounting connections.
Radiator supports, mounting points and connection structures should be designed according to the project requirements and local site conditions.
The transformer radiator is continuously exposed to outdoor conditions.
The cooling system therefore needs to maintain:
throughout its service life.
For this 110kV, 20MVA transformer project, the customer focused on several key requirements.
The transformer needed to operate reliably in a warm tropical environment.
High ambient temperatures can reduce radiator cooling efficiency.
The customer therefore required sufficient heat-transfer area to maintain the specified transformer temperature rise.
The radiator would operate outdoors in a humid environment, with potential exposure to rain and coastal salt air.
The customer required a suitable surface-treatment system to reduce long-term corrosion risks.
The radiator forms part of the transformer’s oil circulation system.
Oil leakage at welded joints or flange connections can lead to maintenance problems and affect transformer operation.
Reliable welding, sealing and leak testing were therefore important requirements.
The customer needed radiator assemblies capable of maintaining structural integrity during strong winds, heavy rain and changing outdoor conditions.
The radiator had to match the transformer tank and its connection interfaces.
Critical dimensions included:
Accurate dimensions help reduce installation modifications at the project site.
The radiator delivery needed to match the transformer manufacturing and project installation schedule.
The customer required a supplier capable of providing consistent quality, complete radiator sets and reliable export delivery.
Based on the customer’s transformer specifications and environmental requirements, we developed a customized finned radiator solution for a 110kV, 20MVA oil-immersed transformer.
The proposed cooling system supports ONAN/ONAF operation, allowing the transformer to operate under different load conditions.
During normal operation, transformer oil circulates naturally through the radiator.
Heat generated by the transformer is transferred to the oil and then released through the radiator surface into the surrounding air.
The radiator provides the necessary heat-transfer area for natural cooling.
When transformer loading increases, forced-air cooling can be activated.
Fans increase the airflow across the radiator surface and improve heat dissipation.
The combination of ONAN and ONAF provides additional cooling flexibility for high-load operation.
The radiator solution was developed based on the following factors:
The radiator dimensions, fin configuration, header pipes and connection flanges can be customized according to the approved transformer drawings.
This helps ensure proper installation and oil circulation between the transformer tank and radiator.
| Item | Project Specification |
|---|---|
| Transformer Capacity | 20 MVA |
| Voltage | 110 kV |
| Transformer Type | Oil-Immersed Power Transformer |
| Cooling System | ONAN / ONAF |
| Application | Outdoor Power Substation |
| Radiator Type | Finned Transformer Radiator |
| Radiator Quantity | According to thermal calculation |
| Radiator Dimensions | Customized |
| Fin Configuration | Customized |
| Header Pipe | According to transformer drawing |
| Connection Flange | Customized |
| Surface Treatment | Enhanced Outdoor Anti-Corrosion Coating |
| Leak Testing | According to project requirements |
| Installation | Outdoor |
| Destination | Philippines |
Note: Final radiator quantity, dimensions, cooling capacity and connection specifications should be confirmed through the transformer’s thermal calculation and approved technical drawings.
The Philippine operating environment required particular attention to cooling and corrosion protection.
The radiator design provides sufficient heat-transfer area to support transformer cooling under high ambient temperature conditions.
The final radiator capacity is determined according to transformer losses, temperature-rise requirements, cooling method and site conditions.
For outdoor and coastal applications, the radiator can be supplied with an enhanced coating system.
The coating system can be selected according to:
Radiator header pipes and flange connections are designed according to the transformer tank drawings.
Reliable welding and leak testing help minimize the risk of oil leakage during long-term operation.
Radiator supports and mounting components are designed according to the customer’s installation requirements.
This helps the radiator withstand long-term outdoor exposure and site-specific weather conditions.
Quality control is focused on the critical performance requirements of transformer radiators.
Critical dimensions are checked against approved drawings, including:
Welded joints are inspected to help ensure structural integrity and reliable oil-flow channels.
Radiator assemblies are tested according to the specified project requirements.
The test focuses on:
The radiator coating is inspected for:
For coastal projects, additional coating requirements can be incorporated into the project specification.
For a 110kV transformer project, delivery delays can affect transformer assembly, site installation and commissioning.
We therefore coordinate radiator production and delivery according to the customer’s project schedule.
Our supply capability includes:
Radiator dimensions, fin configurations, header pipes and connection interfaces can be customized according to customer drawings.
Production and inspection procedures help maintain consistent quality across radiator units supplied within the same project.
Radiators and required connection components can be supplied according to the approved project requirements.
The radiators are appropriately protected during transportation to reduce the risk of:
Products can be prepared for container transportation and export to the Philippines according to customer requirements.
The project demonstrates our ability to provide customized transformer cooling solutions for tropical and coastal environments.
The main value of the solution includes:
Reliable Heat Dissipation
The finned radiator provides the required heat-transfer area for the 20MVA transformer cooling system.
Tropical Climate Adaptation
The radiator design considers high temperature and humidity conditions.
Enhanced Corrosion Protection
The coating system can be upgraded for coastal and salt-air environments.
Reliable Oil Tightness
Welding and leak testing help reduce the risk of oil leakage.
Outdoor Durability
The radiator structure and mounting system are designed for long-term outdoor operation.
Accurate Installation
Customized dimensions and connection interfaces help ensure compatibility with the transformer tank.
Stable Supply
Coordinated production, inspection, packaging and export support the customer’s project schedule.
For a 110kV, 20MVA oil-immersed transformer in the Philippines, reliable radiator performance is essential for maintaining stable transformer operating temperatures.
The tropical environment creates additional challenges, including high ambient temperature, high humidity, heavy rainfall, coastal salt exposure and severe weather.
Our customized transformer finned radiator solution addresses these requirements through:
Efficient Cooling + Corrosion Protection + Oil-Tight Connections + Outdoor Durability + Accurate Installation + Stable Supply
By supplying customized transformer radiators according to customer drawings and project requirements, we provide cooling solutions for transformer manufacturers, EPC contractors, utilities and power infrastructure projects in the Philippines.
Looking for transformer radiators for a 110kV, 20MVA transformer? Send us your transformer drawing and cooling requirements for a customized solution.
