Greenhouse Screen Selection Case Study-UAE

Project Location: UAE

Greenhouse Plants: Lettuce

Greenhouse type: Semi-closed greenhouse

Local Climate Conditions:

Key Climate Parameters

1. Temperature

o Summer (Jun–Sep): Avg. max 41–44°C (extreme 45°C+); night min 28–32°C; apparent temp often >45°C.

o Winter (Dec–Feb): Avg. max 24–26°C; night min 13–16°C (extreme 5–8°C).

o Transition (Mar–May, Oct–Nov): Day 28–38°C, night 18–25°C.

2. Solar Radiation & Sunshine

o Annual sunshine: 3,500–3,800 hours; clear days >85%.

o Summer daylight: 13.3–13.6 hours/day (May–Jul).

o Peak PAR: 1,800–2,200 μmol/m²/s (midday).

o Extremely high UV intensity.

3. Humidity

o Annual RH: 50–65%.

o Summer daytime RH: 30–45% (very dry).

o Night/early morning RH: 60–80% (condensation risk).

4. Wind & Sandstorms

o Avg. wind speed: 15–25 km/h; gusts 40–50 km/h.

o Sandstorms frequent in spring (Mar–May).

5. Precipitation

o Annual rainfall: <120 mm, mostly Nov–Mar (2–3 light rain days/month).

Climate logic for this region:

"No strong heat insulation is needed; only extreme light control is required."

This extreme diffusion configuration is designed to completely eliminate shadows and light spots, preventing lettuce tip burn, which is the most challenging issue for hydroponic lettuce production.

Based on the customer's greenhouse configuration and cultivation requirements, we have selected the following screens for the customer:

Upper layer: OptiDiffuse 57-47 FR

Lower layer: OptiDiffuse 20-47 FR