How to Control the Temperature of the Chicken House

Company: Qingdao NPW Plastic Co., Ltd.

1. Essential Equipment for Closed Laying Hen House

Environmental Control System

• Fan: For ventilation and heat dissipation.
• Wet Curtain: Cooling in summer.
• Heater: Insulation in winter.
• Temperature & Humidity Sensor: Real-time environmental monitoring.

Other Systems

• Lighting: Automatic dimming LED lights to simulate natural light cycles.
• Feeding: Automatic feeding line and feed silo.
• Drinking: Nipple drinker and water line.
• Egg Collection: Automatic conveyor belt and egg warehouse.
• Manure Cleaning: Conveyor belt manure cleaning machine.
• Monitoring: Sensors for temperature, humidity, CO₂, and ammonia.
• Disinfection: Spray disinfection machine.

2. Optimal Environmental Parameters for Laying Hens

Temperature

• Egg-laying period: 18–25℃ (higher for chicks, decreasing with age).

Humidity

• Ideal range: 60–70%.
• Risks: >80% may cause respiratory diseases; <50% may lead to dust issues.

Negative Pressure for Closed Chicken Houses

• House size: 104m×15m×4m (50,000 laying hens).
• Recommended value: 20–30 Pa, adjusted for airtightness and airflow uniformity.
• Suggestion: Start at 25–30 Pa, verify with a smoke test to avoid dead corners.

3. Fan Configuration and Calculation

Ventilation Requirements

Scenario	Normal Summer	Extreme High Temperature & Humidity
Total Air Volume (m³/h)	500,000	750,000
Number of Fans*	12 + 2 spares	18 + 2 spares
*Single fan air volume: 42,100 m³/h at -25Pa.

Calculation Steps (Normal Summer)

1. Total air volume: 50,000 hens × 10 m³/h/hen = 500,000 m³/h.
2. Number of fans: 500,000 ÷ 42,100 ≈ 11.87 → 12 fans (rounded up).
3. Verification:
   • House volume: 104×15×4 = 6,240 m³.
   • Ventilation times/hour: 500,000 ÷ 6,240 ≈ 80 (meets high-temperature requirements).

Dynamic Adjustment

• Winter: Minimum ventilation (1.5 m³/h/hen).
• Summer: Full-load operation.

4. Special Adjustments for Tropical Climates (e.g., Philippines)

Challenge

High summer temperatures (＞35℃) and humidity (＞80%) reduce wet curtain efficiency.

Solution: Increase Wind Speed

• Goal: Create a wind cooling effect (chicken surface wind speed ≥2.5 m/s) to alleviate heat stress.

Recalculation for Extreme Conditions

1. Air volume demand: 50,000 hens × 15 m³/h/hen = 750,000 m³/h.
2. Number of fans: 750,000 ÷ 42,100 ≈ 17.8 → 18 fans (18 + 2 spares total).
3. Verification:
   • Ventilation times/hour: 750,000 ÷ 6,240 ≈ 120 (within 100–150 allowed for extreme heat).

Supplementary Measures

• Airflow Optimization:
  • Adjust air inlet positions to ensure uniform coverage.
  • Use guide plates or wind curtains to direct airflow to chicken height (wind speed >2.5 m/s).
• Emergency Cooling:
  • Intermittent spraying (avoid high humidity periods).
  • Direct water spray on chickens (requires strong ventilation).
• Monitoring & Adjustment:
  • Track chicken behavior (e.g., open-mouth breathing, wing spreading) to adjust fan operation.
  • Control lighting to reduce activity-generated heat.

5. Conclusion

The above data reflects Qingdao NPW Plastic Co., Ltd.’s experience in designing farms for tropical regions. Actual parameters should be tailored to the farm’s location, scale, and house size. Contact us for a customized farm design plan.