To find the wet bulb temperature (Tw), use the provided formula that incorporates the air temperature (T) and relative humidity (rh). This calculation helps understand cooling effects in various applications, especially in HVAC systems.
The Wet Bulb Calculator is a valuable tool for calculating the wet bulb temperature, which combines air temperature and humidity levels to indicate cooling capacity in the air.
This measurement is used in HVAC (heating, ventilation, and air conditioning), weather forecasting, and many industrial applications.
By factoring in both dry temperature and moisture in the air, wet bulb temperature provides a more accurate assessment of air cooling potential, making it crucial in optimizing cooling systems and assessing safe working environments under heat stress conditions.
Formula:
*Tw = T * arctan[0.152 * (rh + 8.3136)^(1/2)] + arctan(T + rh) – arctan(rh – 1.6763) + 0.00391838 (rh)^(3/2) * arctan(0.0231 * rh) – 4.68
| Variable | Description |
|---|---|
| Tw | Wet bulb temperature |
| T | Air temperature (dry bulb) |
| rh | Relative humidity |
| arctan | Trigonometric arctangent function |
| 0.152, 8.3136, 1.6763, etc. | Constants used in the calculation |
Solved Calculations:
Example 1:
Calculate the wet bulb temperature with an air temperature (T) of 30°C and relative humidity (rh) of 50%.
| Step | Calculation |
|---|---|
| 1 | Tw = 30 * arctan[0.152 * (50 + 8.3136)^(1/2)] + arctan(30 + 50) – arctan(50 – 1.6763) |
| 2 | + 0.00391838 *(50)^(3/2) * arctan(0.0231 * 50) – 4.686 |
| 3 | Tw = calculated value (example outcome) |
Answer: Calculated wet bulb temperature
Example 2:
Calculate the wet bulb temperature with an air temperature (T) of 25°C and relative humidity (rh) of 70%.
| Step | Calculation |
|---|---|
| 1 | Tw = 25 * arctan[0.152 * (70 + 8.3136)^(1/2)] + arctan(25 + 70) – arctan(70 – 1.6763) |
| 2 | + 0.00391838 *(70)^(3/2) * arctan(0.0231 * 70) – 4.686 |
| 3 | Tw = calculated value (example outcome) |
Answer: Calculated wet bulb temperature
What is a Wet Bulb Calculator?
The Wet Bulb Calculator is a handy tool that can record the wet bulb temperature. This metric is critical in HVAC and meteorology for measuring humidity and assessing thermal comfort.
Wet bulb temperature reflects the lowest temperature an object can cool down to by evaporative cooling, influenced by ambient air temperature and humidity.
Unlike dry bulb temperature, it provides insights into the moisture in the air, which is vital for cooling calculations, snowmaking, and other environmental assessments.
If the users want to calculate the wet bulb temperature, they typically need to input the dry bulb temperature (air temperature) and relative humidity. This calculation is particularly valuable in cooling towers and industrial cooling setups where maintaining specific humidity levels is crucial.
It’s also commonly used in psychrometric charts to determine humidity levels by assessing both wet and dry bulb readings.
Final Words:
Decisively, the Wet Bulb Calculator is essential for calculating accurate humidity levels, supporting critical applications in HVAC, snowmaking, and meteorology, enhancing overall temperature and moisture management.
