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Views: 0 Author: Site Editor Publish Time: 2025-11-14 Origin: Site
In modern industrial cooling systems, Mach Cooling Tower (hereafter referred to as Mach Cooling) offers an efficient and reliable solution known as the Closed Circuit Cooling Tower (CCT). This article explains its structure, working principle, advantages, application scenarios, selection guidelines, and key highlights of Mach Cooling’s closed-circuit products.
A closed-circuit cooling tower is mainly composed of:
Heat-exchange coil or tubing: The working fluid circulates inside and is isolated from direct contact with air.
Spray water system: Evenly sprays water onto the coil surface to enhance heat transfer.
Fan or ventilation system: Induces or forces airflow through the spray water and coil area to remove heat.
Water basin and circulation pump: Collects and recycles spray water.
Casing structure, drift eliminator, louvers, and control units.
According to Mach Cooling, its AHC-B Series Closed-Circuit Cross-Flow Cooling Tower features a cross-flow design, modular heat exchanger, and automatic digital control system for fans and pumps.
A closed-circuit cooling tower consists of two independent loops:
Internal working fluid loop – The process fluid carrying heat flows through the internal coil without exposure to air.
External spray-water + airflow loop – Spray water wets the outside of the coil, while air passes through to remove heat.
Heat transfer path:
Process fluid → coil wall → spray water → air → discharge
A key benefit is that the process water remains free from dust and contaminants due to its sealed circulation.
| Step | Description |
|---|---|
| 1 | Hot process fluid enters the coil. |
| 2 | Spray pump delivers water to wet the coil surface. |
| 3 | Fan brings in air; evaporation removes heat. |
| 4 | Cooled process fluid returns to the system; spray water is collected and reused. |
| 5 | Evaporation loss, blowdown, and make-up water are managed as needed. |
Clean process loop – No direct contact with air; reduced risk of contamination, scaling, or corrosion.
Lower maintenance cost – Less need for frequent process water treatment due to clean circulation.
Ideal for harsh water conditions or high-purity requirements – Mach Cooling notes its applications in rail transit, metallurgy, and high-temperature industries.
Energy-saving capability – Mach Cooling’s modular design and digital control can reduce energy use by up to 50%.
Higher initial investment due to coils and spray systems.
Spray system requires periodic maintenance to ensure proper heat transfer.
Spray water is still exposed to air and needs proper water treatment.
Performance depends on ambient wet-bulb temperature, airflow, and installation environment.
Chemical, metallurgy, and precision manufacturing industries requiring clean cooling loops.
Data centers, communication stations, rail systems, and power plants.
Areas where water conservation or clean operation is required.
When selecting a closed-circuit cooling tower, consider:
Cooling capacity (m³/h or GPM) – Mach Cooling’s AHC-B series ranges from 30–400 m³/h.
Temperature range & wet-bulb temperature.
Airflow design – cross-flow or counter-flow (Mach Cooling offers cross-flow models).
Spray system configuration.
Coil material – stainless steel or optional red copper upgrade.
Control system – automatic temperature and fan control.
Installation environment – ventilation, site space, structural foundation.
| Parameter | Recommended Range | Notes |
|---|---|---|
| Cooling capacity | 30–400 m³/h | Based on Mach Cooling AHC-B series specifications. |
| Wet-bulb temperature | ~28°C | A common design parameter. |
| Inlet water temperature | Based on process needs | Defined by cooling load. |
| Coil material | Stainless steel / optional copper | Enhances durability and corrosion resistance. |
| Airflow design | Cross-flow or counter-flow | Mach Cooling uses cross-flow. |
| Energy-saving features | Automatic control, VFD fans | Improves efficiency. |
Mach Cooling's AHC-B Series Closed-Circuit Cross-Flow Cooling Tower provides:
Low drift rate due to cross-flow structure.
Modular heat exchanger for easy assembly and maintenance.
Fully sealed loop preventing contamination of process water.
Smart digital control for fan-pump coordination with up to 50% energy savings.
High-quality coil materials (stainless steel / optional copper).
| Model | Flow (m³/h) | Dimensions (mm) | Fan Power (kW) | Noise dB(A) |
|---|---|---|---|---|
| AHC-B-30 | 30 | 3160×1420×3200 | 2.2 | 59 |
| AHC-B-50 | 50 | 3460×1800×3650 | 4 | 60 |
| AHC-B-150 | 150 | 4160×3000×4320 | 11 | 61 |
| … | … | … | … | … |
Mach Cooling recommends:
Choose a well-ventilated area away from heat sources or obstructions.
Ensure the foundation can support the equipment; level difference ≤ ±5 mm.
Leave sufficient space around the unit for easy maintenance.
Regularly clean spray nozzles, coil surfaces, fan belts, and pump bearings.
Manage spray water quality to prevent scaling or bacterial growth.
A closed-circuit cooling tower is an efficient and clean industrial cooling solution. By isolating the process fluid from outside air, it enhances reliability and reduces maintenance requirements. Mach Cooling’s AHC-B Series stands out with superior materials, smart controls, modular design, and strong performance.
For industries such as chemical, metallurgy, data centers, and rail transit, choosing a properly sized closed-circuit cooling tower is a valuable investment.
