Dry and Wet Bulb Calculator

Wet Bulb Temperature Formula:

\[ T_w = T_d - ((T_d - T_{w\_approx}) \times (1 - \frac{RH}{100})) \]

Dry Bulb Temperature (T_d):

°C

Relative Humidity (RH):

Initial Approximation (T_w_approx):

°C

Wet Bulb Temperature (T_w):

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1. What is a Dry and Wet Bulb Calculator?

Definition: This calculator estimates the wet bulb temperature based on dry bulb temperature, relative humidity, and an initial approximation.

Purpose: It helps in meteorological, HVAC, and industrial applications where wet bulb temperature is important for understanding thermal comfort and evaporation rates.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T_w = T_d - ((T_d - T_{w\_approx}) \times (1 - \frac{RH}{100})) \]

Where:

\( T_w \) — Wet bulb temperature (°C)
\( T_d \) — Dry bulb temperature (°C)
\( RH \) — Relative humidity (%)
\( T_{w\_approx} \) — Initial approximation of wet bulb temperature (°C)

Explanation: The formula calculates the wet bulb temperature by adjusting the dry bulb temperature based on humidity and an initial approximation.

3. Importance of Wet Bulb Temperature

Details: Wet bulb temperature is crucial for understanding human comfort, predicting precipitation, designing HVAC systems, and industrial processes involving evaporation.

4. Using the Calculator

Tips: Enter the dry bulb temperature in °C, relative humidity (0-100%), and an initial approximation (default 15°C). The approximation is typically close to the actual wet bulb temperature.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between dry and wet bulb temperatures?
A: Dry bulb measures air temperature, while wet bulb measures the lowest temperature air can reach by evaporative cooling.

Q2: Why is the initial approximation needed?
A: The calculation is iterative, and the approximation serves as the starting point for the calculation.

Q3: What's a typical wet bulb approximation value?
A: 15°C is a reasonable default, but you can adjust based on expected conditions (lower for dry climates, higher for humid ones).

Q4: How accurate is this calculation?
A: This provides a good estimate, but for precise measurements, actual wet bulb thermometers or psychrometric charts should be used.

Q5: What happens at 100% relative humidity?
A: At 100% RH, the wet bulb temperature equals the dry bulb temperature as no more evaporation can occur.