In a major step forward in industrial heat exchange technology, Aochun proudly introduces the GLL Series Shell-and-Tube Heat Exchangers, combining proven engineering principles with innovative design enhancements to meet the evolving needs of global industries.
How It Works: The Science Behind Efficient Heat Transfer
The GLL Series shell-and-tube heat exchanger consists of key components including:
- Housing (Shell) – Typically cylindrical, housing the entire system
- Tube Bundle – A group of tubes fixed at both ends to tube sheets
- Baffles (Flow Plates) – Installed inside the shell to direct fluid flow and enhance heat transfer
- Tube Sheets – Secure the tubes and separate the shell-side and tube-side fluids
- Pipe Box (Header) – Distributes the fluid into the tubes
Two fluids are exchanged:
- Tube-side fluid (A fluid) flows through the internal tubes
- Shell-side fluid (B fluid) flows around the outside of the tubes
This counter-current or cross-flow configuration ensures maximum heat transfer efficiency. The baffles not only support the tube bundle but also increase turbulence in the shell-side fluid, improving heat exchange performance and reducing fouling.
Key Advantages of the GLL Series:
Optimized Flow Design
The strategically placed baffles force the shell-side fluid to pass through the tube bundle multiple times, increasing residence time and enhancing heat transfer. This design significantly improves thermal efficiency compared to simpler configurations.
Thermal Stress Mitigation
Due to temperature differences between the shell and tube bundles, thermal expansion can cause significant stress—leading to tube bending, cracking, or detachment from tube sheets.
To address this, the GLL Series incorporates thermal compensation mechanisms such as floating tube sheets or expansion joints. These features effectively reduce thermal stress when the temperature difference exceeds 50°C, ensuring long-term operational stability.
Robust Construction & Durability
Manufactured using high-grade materials (such as carbon steel, stainless steel 304/316), the GLL Series is built to withstand high pressure, corrosive environments, and continuous operation in harsh conditions.
Customizable & Scalable
Available in various sizes, tube layouts, and material options, the GLL Series can be tailored to specific application requirements—including cooling systems in power plants, heat recovery in chemical processing, and condensers in refrigeration systems.
Compliant with International Standards
All GLL Series units are manufactured under strict quality control, meeting ASME, PED, ISO 9001, and GJB 9001C standards. Each unit undergoes rigorous testing—including hydraulic pressure tests and non-destructive inspections—to ensure safety, performance, and compliance.
Why Choose Aochun’s GLL Series?
With over 20 years of experience in heat exchanger manufacturing and a proven track record serving global clients like Siemens, Ingersoll Rand, China Huaneng, SPIC, and Shanghai Electric, Aochun delivers reliable, high-performance solutions backed by technical expertise and comprehensive after-sales support.
The GLL Series represents Aochun’s commitment to innovation and excellence in thermal engineering—offering customers a balance of efficiency, durability, and cost-effectiveness.
Applications Include:
- Power plant boiler feedwater heating
- Chemical reactor cooling
- Oil and gas refinery heat recovery
- Marine engine cooling systems
- HVAC and industrial process cooling
