The Ultimate Guide to Calculating Cooling Capacity of Outdoor Cabinets | 3 Steps to Accurate Selection + Example Analysis

Subtitle: A Must-Read for the Telecom/Power Industry! High-Temperature Shutdown Prevention Solution

Core Formula 
Outdoor Cabinet Cooling Capacity = (Equipment Heat Dissipation + Environmental Heat Transfer + Solar Radiation) × Safety Margin
Wrong Selection = Equipment Downtime! Accurate Calculation is the Key

I. Analysis of the Three Major Heat Sources (Including Quick Calculation Templates)

1. Equipment Heat Dissipation (Q₁)
Industry Pain Points: 90% of Over-Temperature Failures Come from Underestimating Equipment Heat!
Calculation method:

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ΣEquipment power consumption (W) = server power consumption + power supply power consumption + others
✅ Example: 2 500W servers + 200W power supply = **1200W**
2. Environmental heat transfer (Q₂)
Key parameter table (collect for future use):

Calculation formula:

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Q₂ = [λ × cabinet surface area (m²) × temperature difference (ΔT)] / insulation layer thickness (δ)
✅ Example: 8.8m² cabinet/ΔT=20K/δ=0.05m → 105.6W

3. Solar radiation heat (Q₃)

Regional difference warning:

The radiation intensity in tropical areas is as high as 1000W/m² (only 600W/m² in temperate zones)

Cost-saving tips:

Light cabinet absorption coefficient (0.3-0.5) vs dark cabinet (0.7-0.9) → refrigeration equipment costs reduced by 30%!

✅ Example: 3m² receiving surface → 720W

II. Ultimate calculation template (Excel can be directly applied)

⚠️ Selection conclusion: Choose ≥3.1kW outdoor dedicated cooling equipment

II. Engineers' guide to avoid pitfalls (industry experience)

Fatal misunderstandings

Indoor air conditioners used in outdoor cabinets → The efficiency plummets by 60% on hot days!
✅ Solution: Choose outdoor models with a temperature resistance of -30℃~55℃

Hidden cost black hole

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Sealed cabinet: must rely 100% on refrigeration equipment
Ventilated cabinet: can reduce 10-20% of cooling capacity → save $500+ in electricity bills per year!
Hot spot failure prevention

Equipment-intensive areas must meet: ventilation frequency ≥30 times/hour
Recommended solution: side-mounted circulation fan + top strong exhaust

Welcome to discuss with our Team!