Case Study: Handing Over the DeAir.RE-2400H Super Heat-Pump Dehumidifier for a Marine Paint Booth

Case Study: Handing Over the DeAir.RE-2400H Super Heat-Pump Dehumidifier for a Marine Paint Booth

In the shipbuilding and ship repair industry, shot blasting (sandblasting) and painting rooms are areas that demand extremely strict technical standards. Even a minor deviation in humidity can completely destroy the effort put into cleaning the hull's surface, causing damages worth hundreds of millions of VND. Recently, DeAir's engineering team proudly handed over and commissioned the massive capacity DeAir.RE-2400H super dehumidifier system for a large-scale marine paint booth project, definitively solving the harsh high-humidity challenge.

1. The Harsh Challenge of the Shipbuilding Industry

After undergoing the shot blasting (sandblasting) process to clean the surface, the steel hull of a ship becomes extremely sensitive to the environment. This is a constant "pain point" for contractors:

• "Flash Rust" Phenomenon: If the air humidity in the workshop exceeds 60%, the newly cleaned steel layer immediately reacts with water vapor and oxygen, creating a layer of orange rust within just a few hours. When this happens, contractors are forced to spend enormous amounts of money and time sandblasting the rust off all over again.
• Reduced Industrial Paint Lifespan: Specialized marine coatings (Epoxy, Polyurethane) require an absolutely dry surface. Painting in a humid environment causes moisture to be "trapped" under the paint film, leading to blistering, bubbling, peeling, and a severe reduction in adhesion.

The investor required an industrial dehumidification system with an enormous capacity, capable of operating durably and continuously to maintain the paint booth's humidity below the safe threshold (typically ≤ 50%), regardless of stormy or highly humid weather conditions outside.

2. Project Overview & Why the DeAir.RE-2400H Was Chosen

To accommodate the massive spatial volume of the hull paint booth, DeAir designed and deployed its most powerful dehumidifier: the DeAir.RE-2400H, part of the DeAir RE-H heat pump dryer series specifically designed for heavy industry.

Outstanding Strengths of the DeAir.RE-2400H:

• Massive Dehumidification Capacity: Capable of extracting vast amounts of water vapor from the air in a short time, meeting the dehumidification requirements for paint booths spanning thousands of cubic meters.
• Extreme Fan Static Pressure (Pa): The machine is designed with a high static pressure centrifugal fan, capable of pushing dry air over long distances and distributing it evenly to every corner of the paint booth through a complex ducting system.
• Resistance to Harsh Environments: The special construction of the DeAir RE-H heat-resistant dehumidifier allows the equipment to operate stably in environments containing paint solvents, providing effective anti-corrosion properties.
• Energy Efficiency: Integrated Heat-pump technology allows the system to recover heat, resulting in superior energy savings, and can blow dry, warm air to help the paint layer dry faster.

3. Construction Diary: From Factory to Worksite

Given the oversized and overweight nature of the equipment, transportation and hoisting required careful calculation from DeAir's engineering and operational teams.

At the shipyard worksite, the main machine block was securely positioned. The technical team proceeded to connect the massive supply/return ducting system, navigating through complex steel structures to deliver dry air directly inside the paint booth area.

Watch a close-up video of the entire installation and trial run process of the super dehumidifier system at the site:

4. Achieved Results & Quality Acceptance

After completing the connections, inspecting the control panel, and running load tests, the DeAir.RE-2400H system delivered results that completely convinced the investor:

• Elimination of Flash Rust: The machine rapidly pulled the paint booth's humidity from a very high level (>80% due to coastal weather) down into the safe standard range, helping the steel hull surface retain its metallic shine for days while waiting for primer application.
• Improved Coating Quality: The dry and warm air stream from the machine helped the Epoxy/Polyurethane paint solvents evaporate faster, resulting in absolute adhesion and passing all stringent QA/QC tests of the international maritime industry.
• Commitment to Durability: The machine operates smoothly with low noise, running stably and continuously 24/7 to meet the contractor's urgent ship handover schedule.