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Open cooling tower
Measurement Standard: According to national standard GB/T 7190.1-2018, cooling capacity should be ≥95%.
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Open cooling tower
Keywords：
Open Cooling Tower
Open cooling tower Details
Basic Performance Parameters
Cooling Capacity
Measurement Standard: According to national standard GB/T 7190.1-2018, cooling capacity should be ≥95%.
Calculation Method: Cooling capacity = Cooling water flow × Specific heat capacity of water × Temperature difference (ΔT), typical temperature difference range is 3–15℃ (for example, when the flow rate is 100t/h, the temperature drop is usually designed as 5℃).
Water Flow and Temperature Difference
Standard Operating Conditions: Inlet water temperature 37℃, outlet water temperature 32℃ is a common engineering design benchmark.
Flow Range: Small and medium-sized open cooling towers are 10–1000m³/h, large open cooling towers >1000m³/h.
Structural Parameters
Parameter Category |
Technical Indicators |
Filler Type |
PVC film filler (increases water-air contact area, improves heat dissipation efficiency by 20–35%) |
Fan Configuration |
Axial flow fan (power and air volume matching, energy consumption accounts for about 60–70%) |
Spray System |
Multi-stage spray pipe + wide-angle nozzle (coverage exceeds 95%) |
Tower Body Material |
Galvanized steel (standard) or stainless steel (corrosion-resistant scenarios) |
Environmental Adaptability Parameters
Wet-bulb Temperature Influence
Cooling Range Index: The smaller the difference between the outlet water temperature and the wet-bulb temperature, the higher the cooling efficiency, typical cooling range ≤5℃.
Limit Operating Conditions: When the wet-bulb temperature ≥28℃, it is necessary to increase the fan power or use auxiliary heat dissipation devices.
Noise Control
Standard Requirements: Tower body noise at 1m ≤75dB(A), low-noise type can be optimized to within 65dB(A).
Energy Saving and Loss Indicators
Parameters |
Water and Energy Saving Cooling Tower |
Comparative Description |
Drift Rate |
≤0.5% (open type) |
|
Closed Cooling Tower Drift Rate |
0.05% |
|
Makeup Water |
1.24–2% of circulating water |
Closed cooling tower makeup water demand as low as 0.1–0.2% |
Comprehensive Energy Consumption Ratio |
0.12–0.18kW/(m³/h) |
Includes the total energy consumption of fans, water pumps and auxiliary equipment |
Operation and Maintenance Parameters
Water Quality Requirements
Requires regular treatment: Due to the direct contact between water and air, algae and scale are easily generated. It is recommended to check the pH value (6.5–8.5) and turbidity (≤20NTU) monthly.
Drainage system: An automatic drainage valve is installed at the bottom of the tower, and the impurity removal rate is ≥90%.
Anti-freeze Design
Optional configuration: Heating coil (keep water temperature ≥5℃) or drainage device (winter shutdown protection).
Equipment Diagram
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