answer:
First of all, we must understand a problem, the temperature defined in physics and the somatosensory temperature are not the same! Somatosensory temperature combines environmental factors, wind speed, and long- and short-wave radiation, so it is more representative to measure the comfort of people in the environment relative to the physically defined temperature [1].
According to the 1984 Robert Stederman published The General Formula for Somatosensory Temperature (Formula Warning)
WhereAT is the somatosensory temperature (°C), T is the air temperature (°C), e is the water vapor pressure (hPa), V is the wind speed (m/s), and RH is the relative humidity (%).
According to the above formula, it can be judged that the somatosensory temperature (AT) is positively correlated with water vapor pressure and negatively correlated with wind speed.
The detailed calculations are as follows (16 degrees Celsius in physics for winter and summer, 90% for ventilated summer rooms, 10% for winter relative humidity, and 0 m/s for wind speeds), and according to Robert Stedelman
First, calculate the water vapor pressure in winter and summer:
Then substitute the formula to calculate the somatosensory temperature:
It is not difficult to calculate that the temperature difference between winter and summer is:
In other words, under the above conditions, the somatosensory temperature in winter will be about 2.89 degrees Celsius lower than the somatosensory temperature in summer!!
Summary: The relative humidity of winter will become smaller than that of summer, and if the wind speed is larger, even if it is the same as the temperature in summer, the body will feel colder.
Tips: Recently, the cooling down is large, everyone should pay attention to keep warm!
bibliography:
Chen Liyuan. Study on temperature regulation characteristics and somatosensory temperature of winter and summer dairy cows[D].Nanjing Agricultural University, 2014.
by just_iu