Cross Flow Closed Circuit Cooling Tower for Industrial Process Cooling
A cross flow closed circuit cooling tower is an evaporative heat rejection system designed to cool process fluids circulating through a closed heat exchange coil. Unlike an open cooling tower, the process fluid remains inside the coil and does not directly contact the spray water or ambient air.
During operation, spray water is distributed over the outside surface of the heat exchange coil while ambient air flows horizontally through the heat exchange section. Heat from the process fluid is transferred through the coil wall to the spray water and then rejected to the atmosphere through evaporation.
This closed circuit design helps isolate the process fluid from external contaminants while providing efficient heat rejection for industrial cooling applications. The system can be configured for water, oil and other compatible liquids according to the required operating conditions.
Cooling capacity, coil material and other components can be selected according to the actual heat load, fluid flow rate, inlet and outlet temperatures, local design wet-bulb temperature and installation conditions.
Working Principle
The cross flow closed circuit cooling tower uses a closed process-fluid circuit, a separate spray-water circuit and a cross-flow air path to remove heat from the process fluid.
1. Hot Process Fluid Enters the Heat Exchange Coil
The heated process fluid enters the closed heat exchange coil after absorbing heat from the connected equipment or industrial process. The fluid remains inside the coil throughout the cooling process and does not directly contact the spray water or ambient air.
2. Spray Water Is Distributed Over the Coil
A spray water pump circulates water from the basin to the spray distribution system. The spray water is evenly distributed over the external surface of the heat exchange coil and flows downward by gravity.
3. Ambient Air Flows Horizontally Through the Tower
Fans draw ambient air into the cooling tower from the sides. The air passes horizontally through the coil and spray-water zone, creating a cross-flow heat exchange process.
4. Heat Is Rejected Through Evaporation
Heat moves from the process fluid through the coil wall to the spray water. As the spray water comes into contact with the moving air, part of the water evaporates and carries heat away from the system.
5. Cooled Process Fluid Returns to the System
After releasing heat, the process fluid leaves the heat exchange coil at a lower temperature and returns to the connected equipment or process. The cooling cycle then continues continuously.
Heat Transfer Path:
Process Fluid → Heat Exchange Coil → Spray Water → Ambient Air
Key Advantages of Closed Circuit Cooling
Closed Process Fluid Circuit
The process fluid circulates inside the heat exchange coil and remains separated from the external spray water and ambient air. This helps reduce the risk of external contaminants entering the process loop.
Cross Flow Heat Exchange
Ambient air enters horizontally from the sides while spray water flows downward over the heat exchange coil. The cross-flow arrangement creates an effective air-water contact path for evaporative heat rejection.
Flexible Process Fluid Options
The system can be designed for water, oil and other compatible liquids according to the fluid properties, operating temperature and required cooling capacity.
Multiple Material Options
The heat exchange coil and casing can be configured with different materials according to the application and corrosion-resistance requirements, including stainless steel and coated steel options.
Suitable for Industrial Process Cooling
The closed circuit design is suitable for applications where the process fluid needs to remain isolated from the external cooling environment.
Application-Based Configuration
Cooling capacity, coil material, fan, pump and other components can be selected according to the actual operating conditions and project requirements.
Closed Circuit vs Open Cooling Tower
Technical parameters: Design conditions: wet bulb temperature: 28 °C, dry bulb temperature: 31.5 °C, atmospheric pressure: 9.94X 10⁴PA.
Model | Cooling capacity under standard conditions (kcal/h) | Circulation flow (m³/h) | Dimensions (mm) | Fan Power (kw) | Fan diameter (mm) | Spray pump power (kw) | Inlet andoutlet DN | Over flow Sewage DN | Hydration DN | Operating weight (kg) |
37°℃-32℃ | 42℃-37℃ | 50°℃-42℃ | L | W | H |
BCHL-100T | 500000 | 100 | 160 | 160 | 2800 | 2700 | 3200 | 3*2 | 1000 | 4 | 125 | 50 | 25 | 7100 |
BCHL-150T | 7500000 | 150 | 240 | 240 | 4750 | 3000 | 3200 | 4*3 | 1100 | 5.5 | 125*2 | 50 | 25 | 9800 |
BCHL-200T | 1000000 | 200 | 320 | 320 | 6350 | 3000 | 3200 | 4*4 | 1200 | 4*2 | 150*2 | 50 | 25 | 12500 |
BCHL-320T | 1600000 | 320 | 512 | 512 | 8000 | 3000 | 3200 | 5.5*4 | 1400 | 5.5*2 | 150*2 | 50 | 25 | 17500 |
BCHL-400T | 200000 | 400 | 640 | 640 | 6350 | 3000 | 3200 | 4*8 | 1200 | 4*4 | 125*8 | 50*2 | 25 | 22500 |
BCHL-500T | 2500000 | 500 | 800 | 800 | 12400 | 3000 | 3200 | 4*8 | 1200 | 4*4 | 150*4 | 50*2 | 25*2 | 28000 |
BCHL-600T | 3000000 | 600 | 960 | 960 | 8000 | 6000 | 3200 | 5.5*8 | 1400 | 5.5*4 | 150*4 | 50*2 | 25*2 | 35000 |
BCHL-800T | 4000000 | 800 | 1280 | 1280 | 12400 | 6000 | 4700 | 7.5*8 | 1500 | 7.5*4 | 200*4 | 50*2 | 25*2 | 45000 |
How to Select a Closed Circuit Cooling Tower
Selecting the appropriate closed circuit cooling tower requires matching the cooling system with the actual operating conditions. The following information is typically required for cooling tower selection:
Cooling capacity or heat load
Process fluid type
Process fluid flow rate
Fluid inlet temperature
Required fluid outlet temperature
Local design wet-bulb temperature
Installation location
Available installation space
Power supply
Required coil and casing materials
Water quality or corrosion requirements
Noise or environmental requirements, if applicable
If the complete operating data is not available, you can send us the available parameters. Our technical team can evaluate the working conditions and recommend a suitable cooling tower configuration.
Applications of Cross Flow Closed Circuit Cooling Tower
The cross flow closed circuit cooling tower can be integrated into a wide range of industrial and commercial cooling systems where controlled process-fluid cooling is required.
Industrial Process Cooling
For manufacturing processes that generate continuous or intermittent heat loads and require stable process-fluid temperatures.
Plastic Injection Molding
For cooling molds, hydraulic systems and related equipment in plastic processing facilities, subject to the required cooling capacity and operating conditions.
HVAC and Chiller Systems
For heat rejection applications where the cooling fluid needs to remain isolated from the external cooling environment.
Compressor and Equipment Cooling
For cooling compressors, machinery and other industrial equipment with continuous heat loads.
Metallurgical Equipment
For cooling furnaces, induction heating equipment and other high-temperature industrial equipment, subject to the application requirements.
Chemical and Process Industries
For process cooling applications where the process fluid needs to circulate through an isolated cooling circuit.
Material and Configuration Options
Heat Exchange Coil
The heat exchange coil can be configured with copper tubes or stainless steel tubes according to the required heat transfer performance, fluid compatibility and corrosion-resistance requirements.
Casing
Available casing options include:
304 stainless steel
Galvanized steel
Magnesium-aluminum-zinc coated steel
Material selection should be based on the process fluid, ambient environment, water quality and required service conditions.
Manufacturing and Quality Control
Our cooling towers are manufactured and configured according to the agreed technical specifications and application requirements. Material selection, component configuration and final inspection are carried out according to the requirements of each project.
Depending on the project, quality control can cover:
Heat exchange coil inspection
Material and component verification
Assembly inspection
Fan and spray system inspection
Electrical component inspection
Overall dimensional inspection
Final inspection before shipment
We can provide on-site photos of our production workshop to help customers understand our manufacturing and quality control processes.
Frequently Asked Questions
What is a cross flow closed circuit cooling tower?
A cross flow closed circuit cooling tower is an evaporative cooling system that removes heat from a process fluid circulating inside a closed heat exchange coil. The process fluid does not directly contact the spray water or ambient air.
What is the difference between a closed circuit and an open cooling tower?
In a closed circuit cooling tower, the process fluid remains inside the heat exchange coil and is separated from the spray water. In an open cooling tower, the cooling water is directly exposed to the air.
What fluids can be cooled?
The system can be designed for water, oil and other compatible liquids, depending on fluid properties, temperature, flow rate and heat-transfer requirements.
Can the cooling tower cool oil?
Yes, the system can be configured for oil cooling when the oil properties and operating conditions are suitable for the selected heat exchange coil and cooling system.
Does the process fluid contact the spray water?
No. In normal closed-circuit operation, the process fluid remains inside the heat exchange coil and does not directly contact the spray water.
Does a closed circuit cooling tower require water treatment?
The process fluid circuit and spray-water circuit are separate. Water treatment may still be required for the spray-water circuit depending on water quality, operating conditions and the selected system configuration.
How do I select the right cooling tower?
Selection depends mainly on cooling capacity, process fluid, flow rate, inlet and outlet temperatures, local wet-bulb temperature, installation conditions and material requirements.
Can the cooling tower be customized?
Yes. The cooling tower configuration can be adjusted according to cooling capacity, process fluid, material requirements, operating conditions, installation space and other project requirements.
Get a Cooling Tower Recommendation
Looking for a suitable cross flow closed circuit cooling tower for your application?
Share your cooling requirements, including the process fluid, flow rate, inlet and outlet temperatures, cooling capacity and installation location. If some information is unavailable, send us the parameters you have.
Our technical team can evaluate the operating conditions and recommend a suitable cooling tower configuration for your project.
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