Cooling Tower
Cooling Tower
Multiple domestic manufacturers for bidding. Free publication. Price to be negotiated between winning bidder and buyer.
Information required for inquiry posting:
- Tonnage or cooling capacity; 2. Purchase quantity
表格
| Type | Working Principle | Main Features | Application Scenarios |
|---|---|---|---|
| Open‑circuit Cooling Tower | Hot water is sprayed onto fill media inside tower, dissipates heat via evaporation & heat conduction through direct contact with air. | Simple structure, low cost, easy maintenance, strong cooling capacity. Circulating water exposed to air, vulnerable to dust contamination and scale formation. | Conventional mold cooling with moderate water‑quality requirements; workshop equipped with water‑treatment devices such as filters & scale inhibitors. |
| Closed‑circuit Cooling Tower | Heat‑exchange coil as core component. Internal circulating water flows inside sealed coil; heat transfers to spray water and ambient air across coil wall, no direct contact between two fluids. | Pure circulating water, no scale clogging, low failure rate, no water basin required for compact footprint. Higher investment and complex construction. | High water‑quality requirements: precision injection molding, clean‑room workshop, soft‑water circulation scenarios to eliminate pipeline blockage risks. |
Core Technical Specifications
Water‑handling Capacity: Core performance indicator in m³/h (ton‑per‑hour), representing volumetric flow the tower can process per hour. Undersized capacity yields insufficient cooling; oversized capacity wastes energy.
Empirical reference: cooling tower capacity shall be slightly higher than total cooling‑water demand of chillers / injection‑molding machines. Common sizes for injection‑molding workshops: 10 T/H ~ 600 T/H and above, covering small‑size to super‑large molding machines.
Design Condition & Nominal Cooling Capacity: Defines operating prerequisites for rated performance, expressed as inlet‑water temperature / outlet‑water temperature / wet‑bulb temperature, e.g. 37℃ / 32℃ / 28℃.
Temperature Difference (△T): Temperature drop between inlet and outlet water; standard condition is 5℃. Larger ΔT means greater heat removal capability.
Approach Temperature: Difference between outlet‑water temperature and ambient wet‑bulb temperature. Smaller value indicates better cooling performance; can never reach zero theoretically.
Note: If local summer average wet‑bulb temperature exceeds 28℃, actual capacity of standard‑spec towers will degrade; select over‑sized or medium‑/high‑temperature variant.
Fan Parameters: Air volume and motor power determine heat‑dissipation efficiency. ‑ Air volume (m³/h): Higher air volume removes more heat. ‑ Motor power (kW): Drives fan assembly; fan diameter & power increase together with water‑handling capacity.
Noise Level: Standard‑type, low‑noise and ultra‑low‑noise options. Low‑noise versions adopt large‑span low‑speed blades plus silencers for air inlet & outlet. Mandatory for sites adjacent to office zones or noise‑sensitive areas.
Overall Dimension & Weight: Outer diameter, height, net weight and operating weight (water‑filled). Critical for installation layout and foundation load‑bearing check.
Selection Guidelines
- Select tower type first, then calculate flow rate: Choose open‑circuit for cost‑saving with basic water‑treatment; closed‑circuit for high stability & water cleanliness with sufficient budget.
- Reserve capacity margin & match local working condition: Specify cooling‑water flow at 1.2‑1.25 × total equipment demand. Provide local wet‑bulb temperature to vendor for validating real‑world performance.
- Multi‑unit parallel layout recommended for multi‑machine workshop: Flexible on‑off operation according to production load, energy‑saving and mutual backup; maintenance without full‑line shutdown.
- Material & environmental adaptability: FRP (fiberglass reinforced plastic) shell, hot‑dip galvanized steel support for anti‑corrosion. Electric heating anti‑freezing accessory required for cold northern regions.
- Reserve maintenance clearance: Keep accessible space for fan, motor and fill media overhaul.
Participation Process
Manufacturers: Contact supplier service for supply registration.
Buyers: Click group‑purchase or contact procurement service to submit requirements. The platform filters suppliers from database or releases bidding based on aggregated demands. Buyers select competitive suppliers and sign sales contracts
