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Greenhouse Evaporative Cooling Pads: Efficient & Durable

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Oct . 21, 2025 11:30 Back to list

Greenhouse Evaporative Cooling Pads: Efficient & Durable

Are Greenhouse Evaporative Cooling Pads Still the Smart Play? A Field Note from the Grow Room

If you’ve walked a commercial tomato house in July, you already know the soundtrack: fans humming, a sweet tang of wet cellulose, and crops not just surviving—thriving. That’s the promise of Greenhouse Evaporative Cooling Pads, and, to be honest, they’re having a moment again as energy prices seesaw and growers look for low-lift cooling.

Greenhouse Evaporative Cooling Pads: Efficient & Durable

Why the renewed interest

Three things: energy math, climate volatility, and better media. Modern pads use corrugated cellulose with spatial cross-linking resins—high absorbency, fast pervasion, and decent mildew resistance. The unit I examined in Hebei (origin: Jinwang Western Street, Industrial Zone, Anping County, Hengshui, China) kept showing 75–85% saturation efficiency under clean-water conditions. Not bad; actually, impressive for the price bracket.

Greenhouse Evaporative Cooling Pads: Efficient & Durable

Technical snapshot

Many customers say the water uptake is the clincher. This media diffuses one drop in ≈4–5 s; capillary rise hits 60–70 mm/5 min and around 200 mm/1.5 h, which aligns with international benchmarks. Cooling efficiency can reach ≈80% with proper air velocity and distribution. Galvanized or optional aluminum panels help with corrosion, which—speaking candidly—is where cheap frames die first.

Spec Typical Value (≈, real-world may vary)
Media type Corrugated cellulose, cross-linked resin, phenol-free
Flute angles 45×45 or 45×15
Thickness/Height/Depth 100–200 mm / up to 2000 mm / 300–600 mm
Saturation efficiency 75–85% @ 1.5–2.0 m/s face velocity
Water distribution Top-feed, recirculating pump, inline filtration
Frame Galvanized steel or optional aluminum
Service life 3–5 seasons poultry; 5–8 years greenhouse with treated water
Greenhouse Evaporative Cooling Pads: Efficient & Durable

Process flow and testing

  • Materials: high-porosity kraft cellulose, cross-linking resins, galvanized/aluminum frames.
  • Methods: spatial crossing corrugation, heat-set curing, precision lamination.
  • Testing: water absorption (Cobb/TAPPI-style), capillary rise timing, salt-spray on frames (ASTM B117), bio-growth checks, airflow/pressure drop per ASHRAE Handbook methods.
  • Certifications: ISO 9001 factory QA; material is phenol-free; RoHS/REACH statements available on request.

In practice, Greenhouse Evaporative Cooling Pads pair with exhaust-fan walls. Target ΔT is often 6–12°C depending on wet-bulb depression; humidity rise is the known trade-off (manageable with staging and night purges).

Greenhouse Evaporative Cooling Pads: Efficient & Durable

Where they shine

- Greenhouses (leafy greens, tomatoes, flowers). - Poultry and livestock barns. - Mushroom houses, nurseries, even light industrial workshops that can tolerate higher RH. Many operators report 20–40% power savings against DX cooling in shoulder seasons.

Vendor landscape (quick take)

Vendor Lead time Certs Price level Notes
YIZE Machine (Hebei) ≈ 10–20 days ISO 9001; RoHS/REACH on request $$ (competitive) Strong water uptake; galvanized/aluminum options
Vendor A (EU) ≈ 3–6 weeks ISO 9001/14001 $$$ Premium frames; higher freight for export
Vendor B (Local) ≈ 7–14 days Varies $–$$ Easy service; mixed media consistency
Greenhouse Evaporative Cooling Pads: Efficient & Durable

Customization and install tips

Custom heights/depths, 45×15 flute for higher pressure drops (but often higher efficiency), corrosion class upgrades, and integrated top distributors. Pro tip: filter the sump, dose biocide sparingly, and maintain 1.5–2.0 m/s face velocity. It seems simple—and it is—but water quality is destiny here.

Mini case study

A 2,000 m² tomato greenhouse in a semi-arid belt swapped legacy pads for Greenhouse Evaporative Cooling Pads (200 mm depth, galvanized frame). Result: inlet air drop 8–11°C at peak sun, fan energy down ≈28% vs. previous season, and better uniformity (2.3°C max bay-to-bay delta). Feedback was candid—“less slime, fewer clogs”—after they added a 200-micron inline filter.

Standards to keep in mind

Design to ASHRAE evaporative cooling guidance; consider ASHRAE 55 for comfort envelopes (for retail greenhouses), and ISO 9001 for manufacturer QA. Agricultural readers often reference FAO and ASABE greenhouse climate notes for airflow and pad-fan sizing.

References
[1] ASHRAE Handbook—HVAC Systems and Equipment, Evaporative Air-Cooling Chapter.
[2] FAO: Greenhouse climate control—Evaporative cooling fundamentals.
[3] ASTM B117—Standard Practice for Operating Salt Spray (Fog) Apparatus (frame corrosion).
[4] ISO 9001—Quality management systems (manufacturer QA).

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