Home
Back
Wet Bulb Temperature Equation:
| From: | To: |
The National Weather Service Wet Bulb Calculator With Wind estimates the wet bulb temperature using an iterative approximation that accounts for wind effects. This is important for assessing heat stress and evaporation rates in various meteorological and environmental applications.
The calculator uses the iterative equation:
Where:
Explanation: This equation approximates the wet bulb temperature by iteratively solving for Tw, accounting for the cooling effect of wind on evaporation.
Details: Wet bulb temperature is crucial for assessing heat stress, determining evaporation rates, and predicting frost formation. It's particularly important in meteorology, agriculture, and occupational health.
Tips: Enter dry bulb temperature and initial wet bulb temperature estimate in °C, and wind speed in m/s. The calculator will iteratively solve for the accurate wet bulb temperature.
Q1: Why is wind speed important in wet bulb calculations?
A: Wind increases evaporation rates, which affects the cooling effect and thus the wet bulb temperature measurement.
Q2: What's the difference between dry bulb and wet bulb temperature?
A: Dry bulb measures air temperature, while wet bulb measures the lowest temperature achievable through evaporative cooling.
Q3: When is wet bulb temperature most important?
A: Critical for heat stress assessment, HVAC design, agricultural frost warnings, and industrial processes involving evaporation.
Q4: Are there limitations to this calculation?
A: This is an approximation. For precise measurements, actual psychrometric measurements should be used, especially in extreme conditions.
Q5: How does wet bulb temperature relate to humidity?
A: The difference between dry and wet bulb temperatures (wet bulb depression) is inversely related to relative humidity.