1. What is Adiabatic Saturation Rate?

The Adiabatic Saturation Rate (ASR) is a measure of how quickly air can be cooled by evaporating water into it under adiabatic conditions. It's calculated as the ratio of temperature drop to humidity ratio.

2. How Does the Calculator Work?

The calculator uses the ASR formula:

Where:

• \( \Delta T \) — Temperature drop (°C)
• \( W \) — Humidity ratio (kg/kg)

Explanation: The equation shows the relationship between temperature change and moisture content during adiabatic saturation processes.

3. Importance of ASR Calculation

Details: ASR is important in HVAC systems, drying processes, and psychrometric analyses where understanding the cooling potential of evaporative processes is crucial.

4. Using the Calculator

Tips: Enter temperature drop in °C and humidity ratio in kg/kg. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical ASR values?
A: Typical values range from 2000 to 2500 °C/(kg/kg) for air-water systems at normal conditions.

Q2: How does ASR relate to wet-bulb temperature?
A: ASR is fundamentally related to the slope of the adiabatic saturation line on a psychrometric chart, which approaches the wet-bulb temperature line.

Q3: When is ASR used in engineering?
A: ASR is used in cooling tower design, evaporative cooling systems, and any process involving simultaneous heat and mass transfer.

Q4: Does ASR change with air temperature?
A: Yes, ASR varies slightly with temperature and pressure, though it's often treated as constant for practical calculations.

Q5: What's the difference between ASR and Lewis number?
A: ASR is a practical engineering parameter, while the Lewis number is a dimensionless number comparing heat and mass transfer.