Can oil immersed transformer be installed in high temperature desert environment?

Yes,customized hermetically-sealed oil immersed transformers are fully applicable for high-temperature desert installation,widely deployed for large-scale desert photovoltaic power stations,desert mining power grids and remote desert township distribution projects across Middle East,North Africa and northwest China desert regions,after targeted optimization against extreme ambient heat(daily peak 45℃~55℃),strong sandstorm,intensive ultraviolet radiation and drastic day-night temperature fluctuation over 30℃in desert climate.Standard regular-type oil transformers without anti-desert upgrade are not fit for direct desert outdoor setup due to overheating risk and sand erosion failure,while modified desert-specific oil immersed units overcome harsh desert drawbacks with mature structural and material upgrades complying with IEC60076 and IEEE C57.12 standards.

1.Superior oil cooling system core advantage for high desert ambient temperature

Mineral/ester insulating oil has far better uniform heat transfer performance than air cooling of dry-type transformers,the inherent core merit supporting long-hour stable operation under continuous over-45℃desert high temperature.

Enhanced corrugated radiator design:Expand total heat dissipation area by 30%~40%via increasing corrugated fin quantity;optional forced-air cooling(OFAF)with high-temperature resistant axial fans for large-capacity above 1000kVA,effectively control top oil temperature below 75℃even under 52℃extreme desert daytime heat to avoid insulation aging acceleration.

High-temperature customized insulating oil:Adopt antioxidant modified mineral oil or FR3 natural ester oil with wider operating range(-40℃~110℃),slow down oil acidification and sludge formation caused by persistent high ambient heat,extend oil service life 2~3 times versus conventional oil in normal climate.Unlike dry-type transformers easily triggering winding overheat shutdown under desert continuous high temperature,oil immersed structure bears periodic PV fluctuating load from desert solar farms steadily.

2.Full-sealed anti-sand&anti-UV structure adapts desert sandstorm environment

Desert frequent sand blowing and floating fine dust are major hidden dangers;hermetic fully-sealed tank eliminates traditional conservator breather structure to block fine desert sand and hot dry air penetrating into inner tank:

Double-layer EPDM high-temperature sealing gaskets on tank flange and wiring terminal box,IP55~IP67 protection grade to stop sand infiltration into winding and core space;

Whole tank surface with thick anti-UV polyester powder coating(dry film≥160μm)and stainless steel fittings,resist long-time strong desert ultraviolet corrosion and wind-blown sand abrasion,prevent shell rust and paint peeling under harsh outdoor exposure.This fully enclosed design drastically cuts routine maintenance of dust cleaning and silica gel replacement,matching unattended desert remote station operation requirement.

3.Economic and installation merits superior for desert large-area layout

Desert PV bases always arrange transformers scattered across vast barren land;oil immersed pad-mounted/pole-mounted types feature compact layout and flexible installation without special heat-insulation chamber construction required by dry-type products,lowering desert civil construction cost greatly.Although customized desert version has slightly higher initial purchase cost,ultra-low maintenance frequency and longer 25+year service cycle bring prominent full-cycle economic benefits.To further optimize heat dissipation,field installation usually builds 20~30cm elevated concrete foundation for transformer,reserving 1.5m surrounding ventilation clearance to accelerate natural air circulation around tank and reduce ambient heat accumulation in summer noon.

4.Optional capacity derating rule under ultra-high desert ambient

For desert regions with sustained annual maximum ambient over 50℃,designers properly derate rated capacity by 5%~10%during model selection to reserve thermal allowance against unexpected extreme heatwave,ensuring long-term safe continuous operation.

APA 7th

Alzahrani,A.,&Aldawsari,M.(2021).Performance optimization of hermetically sealed oil immersed distribution transformers for arid desert high-temperature grids.Applied Thermal Engineering,195,117289.

MLA 9th

Alzahrani,Abdullah,and Mohammed Aldawsari."Performance Optimization of Hermetically Sealed Oil Immersed Distribution Transformers for Arid Desert High-Temperature Grids."Applied Thermal Engineering,vol.195,2021,p.117289,

GB/T 7714-2015

ALZAHRANI A,ALDAWSARI M.Performance optimization of hermetically sealed oil immersed distribution transformers for arid desert high-temperature grids[J].Applied Thermal Engineering,2021,195:117289.