Compact Round Structure
The bottle type body saves space and is easy to place in small industrial or commercial equipment areas.
Bottle Type Open Cooling Tower
Bottle Type Open Cooling Tower
Thermocore bottle type open cooling towers are designed for small and medium HVAC systems, injection molding, light industrial process cooling, machine cooling and general equipment cooling applications where compact installation, economical operation and reliable evaporative water cooling are important.
Also known as a round cooling tower or FRP circular cooling tower, a bottle type cooling tower uses direct air-water contact to cool circulating water. Its round FRP body, vertical airflow path and simple structure make it a practical solution for many small and medium cooling projects.
Product Overview
Bottle Type Open Cooling Tower Overview
A bottle type open cooling tower is a compact round open circuit cooling tower. The circulating water is directly exposed to air inside the tower. Hot water is distributed over the fill, air moves through the tower, and evaporation removes heat from the water. The cooled water collects in the bottom basin and returns to the equipment or process system.
This product is suitable for customers who need a simple, economical and compact cooling tower for small or medium water cooling loads. It is commonly used in injection molding, small chillers, machine cooling and light industrial cooling systems.
Cooling TypeDirect evaporative water cooling
Tower ShapeRound / bottle type FRP structure
Water LoopOpen circulating water loop
Heat Exchange CoreFill + water distribution + airflow
Main BenefitCompact, economical and easy to install
Working Principle
How Does a Bottle Type Open Cooling Tower Work?
The system cools water through direct evaporative heat transfer. Hot water is distributed inside the tower, flows downward through the fill, and contacts air moving upward through the tower. A small portion of water evaporates, removing heat from the remaining circulating water.
1
Hot water enters the towerWater from the chiller, machine or process equipment enters the distribution system.
2
Water flows downward through fillThe fill increases contact area between water and air.
3
Air moves upward through the towerAir enters from the lower section and moves upward through the fill.
4
Evaporation removes heatA small amount of water evaporates and cools the remaining circulating water.
5
Cooled water returns to the systemThe bottom basin collects cooled water for recirculation.
Bottle Type Design
Why Choose a Bottle Type Open Cooling Tower?
Bottle type cooling towers are selected when a project needs a compact, economical and simple open evaporative cooling solution. The round FRP structure is lightweight, practical for outdoor installation and suitable for many small to medium cooling loads.
Economical Cooling Solution
Suitable for projects that need practical evaporative cooling without a large modular tower system.
FRP Corrosion Resistance
FRP casing provides lightweight structure and good outdoor corrosion resistance for common applications.
Simple Installation
Round cooling towers are usually easier to transport, install and connect for small and medium projects.
Suitable for Small Equipment Cooling
Often used for injection molding machines, small chillers, compressors and light industrial processes.
Easy Replacement Option
Can be used to replace older round FRP towers when capacity and dimensions are matched correctly.
Applications
Applications of Bottle Type Open Cooling Towers
Bottle type open cooling towers are used where circulating water can directly contact air and the cooling load is small to medium. They are especially common in injection molding, light industrial cooling, small HVAC systems and equipment cooling.
Compressor
Food & Beverage
HVAC
Industrial Process
Industrial Refrigeration
Injection Molding
Plastic Processing
Bottle Type Open Cooling Towers Application Image Placeholder
Comparison
Bottle Type vs Square Open Cooling Tower
Bottle type and square open cooling towers both cool water through direct evaporative contact with air. The main differences are tower shape, capacity range, scalability, maintenance access and project suitability.
| Item | Bottle Type Open Cooling Tower | Square / Modular Open Cooling Tower |
|---|---|---|
| Tower Shape | Round FRP body | Square or rectangular structure |
| Typical Capacity | Small to medium cooling loads | Medium to large cooling loads |
| Footprint | Compact and simple | Depends on cell quantity and layout |
| Scalability | Limited compared with modular square towers | Better for multi-cell systems and future expansion |
| Maintenance Access | Simple, but space and internal access may be limited | Usually more structured access options for larger systems |
| Best For | Small chillers, injection molding, light industrial equipment cooling | Large HVAC systems, industrial plants and higher water flow projects |
| Selection Logic | Choose when compact size and economical cooling are priorities | Choose when capacity, expansion and service planning are priorities |
System Comparison
Bottle Type Open Cooling Tower vs Closed Circuit Cooling Tower
The key difference is whether the circulating fluid directly contacts air. Bottle type open cooling towers expose water to air for direct evaporative cooling, while closed circuit cooling towers keep the process fluid inside a coil.
| Item | Bottle Type Open Cooling Tower | Closed Circuit Cooling Tower |
|---|---|---|
| Fluid Exposure | Circulating water directly contacts air | Process fluid stays inside a heat exchange coil |
| Cooling Method | Direct evaporative cooling | Indirect evaporative cooling through coil surface |
| Initial Cost | Usually lower | Usually higher |
| Fluid Cleanliness | Water is exposed to dust, air and outdoor contaminants | Main process fluid is better protected |
| Maintenance Focus | Fill, basin, water distribution, water treatment and fan | Coil, spray water, basin, pump, fan and water treatment |
| Best For | Small and medium general water cooling applications | Clean fluid loops and sensitive equipment cooling |
Technical Selection
Technical Selection Guide
Selecting a bottle type open cooling tower requires accurate water and climate data. A professional selection should consider water flow rate, inlet and outlet water temperatures, wet bulb temperature, cooling range, approach, water quality, installation space, airflow clearance and noise requirements.
| Parameter | Why It Matters |
|---|---|
| Cooling Capacity | Determines tower model and required heat rejection capability. |
| Water Flow Rate | Affects fill size, water distribution design and tower model. |
| Inlet Water Temperature | Defines the hot-side operating condition. |
| Outlet Water Temperature | Defines the required cold water target. |
| Wet Bulb Temperature | Key ambient limit for evaporative cooling performance. |
| Cooling Range | Shows how much temperature drop the tower must provide. |
| Approach Temperature | Determines how close the outlet water must be to wet bulb temperature. |
| Water Quality | Affects fill condition, scaling, corrosion and maintenance frequency. |
| Installation Space | Influences tower size, airflow clearance and service access. |
| Power Supply | Affects fan motor configuration and electrical compatibility. |
| Noise Requirement | Affects fan selection, fan speed and installation location. |
Key Components
Key Components of a Bottle Type Open Cooling Tower
Performance depends on the fill, water distribution system, airflow path, fan, basin and FRP structure. Each component should support stable water distribution, efficient air-water contact and practical operation.
FRP Casing
Forms the round tower body and provides lightweight outdoor corrosion resistance.
Heat Exchange Fill
Increases contact area between water and air for evaporative cooling.
Water Distribution System
Distributes hot water over the fill for stable cooling performance.
Axial Fan
Moves air upward through the tower and supports evaporation.
Fan Motor and Drive System
Drives fan operation and should match the required voltage and project conditions.
Air Inlet Section
Allows air to enter the lower area of the tower and pass upward through the fill.
Cold Water Basin
Collects cooled water before it returns to the equipment or process system.
Drift Eliminator
Reduces water droplets carried out by discharge air and helps control water loss.
Material Options
Material Options
Material selection affects corrosion resistance, structural strength, service life and maintenance cost. Bottle type open cooling towers commonly use FRP body materials and PVC heat exchange components.
FRP Casing
FRP casing is widely used for bottle type cooling towers because it is lightweight, corrosion-resistant and suitable for outdoor operation.
FRP tower body
FRP fan stack
Outdoor durability
Heat Exchange and Water Parts
Water contact parts should be selected for heat transfer, corrosion resistance and long-term maintenance.
PVC fill
Water distribution parts
Basin components
Fan and Motor Options
Fan and motor selection affects airflow, noise level, energy use and electrical compatibility.
Axial fan
Motor voltage options
Low-noise option
Water Treatment & Maintenance
Water Treatment and Maintenance
Bottle type open cooling towers expose circulating water directly to air, so water treatment and routine maintenance are essential. Proper maintenance helps prevent scaling, corrosion, biological growth, fill blockage and performance loss.
Water Treatment
Controls scaling, corrosion, biological growth and dissolved solids concentration in the open water loop.
- Monitor water quality
- Control blowdown
- Manage biological growth
Fill and Basin Cleaning
Fill and basin should be inspected and cleaned to maintain stable airflow and water circulation.
- Inspect fill condition
- Clean basin sediment
- Remove debris from air inlet
Fan and Motor Inspection
Fan, motor and support structure should be checked to maintain airflow and safe operation.
- Check fan operation
- Inspect motor condition
- Confirm air inlet clearance
Advantages
Performance Advantages
Bottle type open cooling towers are selected when customers need compact, economical and practical evaporative water cooling for small and medium cooling loads.
Compact Round Structure
Suitable for small sites and equipment areas with limited space.
Economical Cooling
Provides practical open evaporative cooling at a lower initial cost.
FRP Corrosion Resistance
FRP body is lightweight and suitable for outdoor environments.
Easy Installation
Simple structure supports faster installation and connection for small projects.
Suitable for Injection Molding
Commonly used for mold cooling, machine cooling and auxiliary production systems.
Good Replacement Option
Can replace existing round cooling towers when model and capacity are matched.
Simple Operation
Basic open cooling tower structure is easy for operators to understand.
Flexible Model Selection
Different sizes can be selected according to water flow and temperature conditions.
Custom Engineering
Custom Engineering Options
Thermocore can customize bottle type open cooling towers according to cooling capacity, water flow rate, FRP casing, fan system, fill type, power supply, noise requirement, corrosion environment and export shipping requirements.
Thermal Customization
For projects with specific cooling capacity, range, approach or wet bulb requirements.
Cooling capacity
Water flow rate
Approach temperature
Wet bulb design
Structure Customization
For projects requiring specific FRP casing, fan, water distribution or connection arrangement.
Round FRP body
Fan options
Connection size
Low-noise design
Project & Export Customization
For replacement projects, special voltage, OEM cooperation and international shipping requirements.
Replacement model
Special voltage
OEM label
Export packaging
Not Sure Whether Bottle Type Cooling Tower Is Right for Your Project?
Send your cooling capacity, water flow rate, inlet and outlet water temperature, wet bulb temperature and project layout. Our engineering team will compare bottle type, square open, closed circuit and dry cooling options for your project.
Cooling capacity
Water flow rate
Range / approach
Wet bulb
Installation space
FAQ
Bottle Type Open Cooling Tower FAQ
These FAQs are written for HVAC engineers, contractors, industrial buyers and procurement teams who need to understand bottle type cooling tower selection, operation, water treatment and replacement options.
What is a bottle type open cooling tower?
A bottle type open cooling tower is a compact round evaporative cooling tower, usually built with an FRP casing and used for small to medium water cooling applications. Hot water is distributed inside the tower, flows downward through fill media, and directly contacts air. A small portion of the water evaporates and removes heat from the remaining circulating water. Bottle type cooling towers are commonly used for light industrial equipment cooling, small HVAC systems, injection molding machines and general process water cooling.
Why is it called a bottle type cooling tower?
It is commonly called a bottle type cooling tower because the tower body has a round, vertical shape that visually resembles a bottle or cylinder. In many markets, this product is also called a round cooling tower, circular cooling tower or FRP round cooling tower. The name describes the tower shape rather than a different cooling principle.
How does a bottle type open cooling tower work?
Hot water enters the tower through the water distribution system and flows downward over the fill. Air enters from the lower air inlet area and moves upward through the tower, usually driven by an axial fan at the top. As air contacts the falling water, part of the water evaporates and removes heat. The cooled water collects in the bottom basin and returns to the chiller, heat exchanger, injection molding machine or process equipment.
When should I choose a bottle type open cooling tower?
A bottle type open cooling tower is suitable when the project requires a compact, economical and easy-to-install open cooling tower for small or medium cooling loads. It is often selected for light industrial equipment cooling, small HVAC systems, machine cooling and facilities where a round FRP tower provides enough capacity and simple operation.
What is the difference between bottle type and square open cooling towers?
A bottle type cooling tower uses a compact round FRP body and is usually selected for smaller or medium cooling loads. A square or modular open cooling tower is usually better for larger flow rates, multi-cell layouts and projects requiring expansion or more structured maintenance access. Bottle type towers are often more economical and simple, while square towers are more flexible for larger systems.
What is the difference between bottle type and counterflow open cooling towers?
A bottle type cooling tower is usually a round FRP open cooling tower, while counterflow describes the airflow direction where air moves upward against downward water flow. Many bottle type cooling towers also use a counterflow-style air-water contact principle. The difference is that bottle type mainly refers to the round tower shape, while counterflow refers to the heat exchange airflow arrangement.
What information is needed for model selection?
Important selection data includes cooling capacity, circulating water flow rate, inlet hot water temperature, required outlet cold water temperature, local design wet bulb temperature, application, project location, water quality, installation space, power supply and noise requirement. For replacement projects, existing tower photos and nameplate data are also helpful.
Does a bottle type open cooling tower need water treatment?
Yes. Because the circulating water is directly exposed to air, water treatment is important. Treatment helps control scaling, corrosion, biological growth, suspended solids and basin sediment. Without proper water treatment, the fill, basin and water distribution parts may become dirty or blocked, reducing cooling performance.
What materials are commonly used?
Common materials include FRP casing, PVC fill, PVC drift eliminator, air inlet parts, axial fan, motor, water distribution components and bottom basin structure. FRP is widely used for the tower body because it is lightweight, corrosion-resistant and suitable for outdoor installation. Stainless steel or upgraded parts may be considered for special water quality or corrosion environments.
What should I send to get a quotation?
To receive an accurate quotation, send the cooling capacity or heat load, circulating water flow rate, inlet water temperature, outlet water temperature, design wet bulb temperature, project location, application, power supply, installation space, water quality, material preference and any noise or customization requirements.
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Send us your cooling capacity, water flow rate, inlet and outlet water temperature, wet bulb temperature, project location and installation space. Our engineering team will help you select a suitable bottle type open cooling tower model.