METEOROLOGY – URFACE TEMPERATURE & THERMAL COMFORT CALCULATOR
Mean Radiant Temperature
A precise tool.
What is the Mean Radiant Temperature & How does it work?
Mean Radiant Temperature (MRT) is a measure of the average temperature of the surfaces surrounding a person, excluding direct solar radiation. It is an important factor in assessing thermal comfort, especially in outdoor environments where it can significantly influence how hot or cold a person feels.
The MRT is calculated by considering the radiant heat transfer from all surfaces to the human body. This includes walls, floors, ceilings, and other objects that emit infrared radiation. The formula for calculating MRT involves summing up the contributions of each surface’s temperature weighted by its emissivity and distance from the person.
The MRT is calculated by considering the radiant heat transfer from all surfaces to the human body. This includes walls, floors, ceilings, and other objects that emit infrared radiation. The formula for calculating MRT involves summing up the contributions of each surface’s temperature weighted by its emissivity and distance from the person.
MRT = frac{sum_{i=1}^{n} T_i E_i A_i}{sum_{i=1}^{n} E_i A_i}
MRT = Mean Radiant Temperature, Ti = Surface temperature of the i-th object, Ei = Emissivity of the i-th object, Ai = Area of the i-th surface.
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Frequently Asked Questions
What is Mean Radiant Temperature?
Mean Radiant Temperature (MRT) is the average temperature of surrounding surfaces, excluding direct sunlight, affecting how hot or cold a person feels.
How do I calculate MRT?
MRT is calculated by considering radiant heat transfer from all surfaces to the human body, including walls, floors, ceilings, and other objects emitting infrared radiation.
Why is MRT important in outdoor environments?
MRT is crucial for assessing thermal comfort in outdoor settings, as it influences how hot or cold a person feels beyond direct solar radiation.
Can I use this calculator indoors too?
While primarily used outdoors, MRT can also be calculated indoors to assess thermal comfort in buildings by considering the temperatures of internal surfaces.
What factors affect MRT?
Factors affecting MRT include surface temperatures of walls, floors, ceilings, and other objects, as well as environmental conditions like air temperature and humidity.
Results are for informational purposes only and do not constitute professional advice.