What Is the Evaporative Cooling Pad Saturation Effectiveness & Water Loss Calculator?
Direct evaporative cooling utilizes the adiabatic heat exchange between dry ambient air and recirculated water trickling through corrugated cellulose or fiberglass media pads.
Water absorbs sensible latent heat from passing airflow, evaporating and humidifying the stream while lowering air dry-bulb temperature toward the entering wet-bulb temperature.
This calculator predicts the discharged air dry-bulb temperature, sensible cooling tonnage, and required water make-up supply rate based on pad saturation effectiveness.
How Does the Evaporative Cooling Pad Saturation Effectiveness & Water Loss Calculator Work?
The calculation evaluates user-provided measurements using recognized domain equations, converts between measurement units, and adjusts for real-world efficiency factors.
Evaporative Cooling Pad Saturation Effectiveness & Water Loss Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Adiabatic saturation effectiveness relationship and latent heat mass conservation across wet media.
How to Use the Evaporative Cooling Pad Saturation Effectiveness & Water Loss Calculator
- Enter your primary measurements in the input fields above.
- Select your preferred units (e.g. metric or imperial) if applicable.
- Review or adjust operational assumptions such as field efficiency.
- Click Calculate to instantly generate the full results breakdown and visual chart.
- Use the Reset button at any time to clear the form and test a new scenario.
Step-by-Step Example Calculation
Dry Summer Greenhouse (38°C Dry-Bulb, 22°C Wet-Bulb, 85% Pad)
Input Values:
Understanding Your Result
Your calculated result represents the realistic operational capacity or baseline output under the specified conditions. Comparing theoretical and effective outputs reveals the direct impact of turns, overlap, and practical downtime.
Factors That Affect the Result
Field terrain, operator experience, equipment maintenance, overlap margin, and weather conditions can significantly influence real-world output.
When Should You Use This Calculator?
Use this calculator whenever you need quick, verified estimates for job planning, budgeting, equipment sizing, or project timelines.
Assumptions & Limitations
- Leaving Air Temperature: T_leaving = T_db - (η_sat / 100) · (T_db - T_wb).
- Sensible Temperature Drop: ΔT = T_db - T_leaving.
- Sensible Cooling Capacity: Q_sensible = ρ_air · c_p · V · ΔT / 3600 (kW).
- Water Evaporation Consumption: m_water ≈ Q_sensible / h_fg · 3600 (kg/h or L/h, with h_fg ≈ 2450 kJ/kg).
Frequently Asked Questions
Calculation Accuracy & Reference Note
This calculator implements verified, deterministic mathematical equations based on published standards. Results should be treated as professional engineering estimates; always verify critical operations with local equipment manuals and site inspections.