Capesize Bulk Carrier — Engine Room & Cargo Hold Ventilation Fan Package
Table of Contents
Project Overview
A 180,000 DWT Capesize bulk carrier under construction required a full ventilation fan package: engine room supply and exhaust fans, cargo hold ventilation fans, accommodation HVAC fans, and emergency fire fans. Total 28 fans across 8 different specifications, all requiring CCS type approval with BV as secondary class notation.
The Challenge
Engine room ventilation fans for Capesize vessels handle enormous air volumes (up to 120,000 m³/h per fan) and must operate in 55°C ambient temperatures. The emergency fire fans must maintain operation at 250°C for 60 minutes per SOLAS Ch. II-2 Reg. 9.7. Material selection was critical: impeller blades for cargo hold fans needed to be spark-resistant (aluminum bronze or equivalent) per explosion-risk regulations.
Our Solution
Ventilation System Package
- E/R Supply Fans4 × Axial, 120,000 m³/h, 45 kW
- E/R Exhaust Fans4 × Centrifugal, 80,000 m³/h, 37 kW
- Cargo Hold Fans10 × Axial, 25,000 m³/h, 7.5 kW
- Emergency Fire Fans2 × Axial, 250°C/60min rated
- Accommodation HVAC8 × Centrifugal, low-noise
- Cargo Fan ImpellerAluminum Bronze (spark-free)
Results
- 28 fans delivered in 38 days — 2 days ahead
- Noise level: accommodation fans measured 48 dBA (below 55 dBA limit)
- Fire fan test: maintained rated airflow at 250°C for 72 minutes (spec: 60 min)
- All CCS/BV dual certificates issued at factory
Qiangbin Zhu
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