Ventilation and Cooling Pad System – Comprehensive Technical Analysis
1. System Overview
Primary Function: Regulates poultry house environment through negative pressure ventilation and evaporative cooling, achieving:
- Temperature Control: Cools house by 5-10°C (at 35°C ambient)
- Ventilation: Maintains NH₃ <10ppm, CO₂ <3000ppm
- Humidity Balance: Stabilizes relative humidity at 50-70%
2. Core Components & Specifications
| Component | Technical Parameters | Mechanism |
|---|---|---|
| Exhaust Fans | – Diameter: 1380mm – Motor: 1.5-3kW – Airflow: 30,000-50,000 m³/h | Creates negative pressure to force out hot air and gases |
| Cooling Pads | – Material: Honeycomb cellulose – Thickness: 15cm – Efficiency: ≥85% | Water evaporation absorbs heat (2450 kJ/kg), cooling incoming air |
| Water Circulation | – PVC pipes (Φ32mm) – Stainless steel pump (0.75kW) – Auto water level control | Evenly wets pads for consistent performance |
| Control System | – PLC programming – Sensor integration (temp/RH) – Remote monitoring | Automatically adjusts fan speed and water flow (e.g., +10% fan power per 1°C rise) |
3. Operational Workflow
- Fan Activation:
- Negative pressure draws outside air through cooling pads.
- Evaporative Cooling:
- Air passing through wet pads loses heat via water evaporation.
- Air Exchange:
- Cooled air distributes evenly; exhaust fans remove stale air.
4. Key Advantages
| Advantage | Technical Benchmark | Economic Benefit |
|---|---|---|
| Precision Cooling | Temperature fluctuation ≤±1°C | 3-5% higher egg production |
| Energy Savings | 80% less power than AC | Saves $20,000-30,000/year (10,000-bird farm) |
| Durability | Pad lifespan ≥5 years; fans >50,000 hrs | 60% lower maintenance costs |
