[Daily Discussion] Utility Engineering – HVAC – 20200814
Thread Content
Why is the relative humidity of outdoor air higher in summer than in winter? We welcome active participation in discussions; the system offers generous rewards for answering questions from VIP members! ! !
Since outdoor temperatures in summer are higher than those in winter, the ideal gas law indicates that the saturation vapor pressure of water vapor is greater in summer than in winter. Therefore, the relative humidity of outdoor air is higher in summer than in winter.
Since the outdoor temperature in summer is higher than that in winter, and according to the gas law of states the saturated vapor pressure of water vapor is greater in summer than in winter, the relative humidity of the outdoor air in summer is higher than that in winter
Since the outdoor temperature in summer is higher than that in winter, and according to the gas law of states the saturated vapor pressure of water vapor is greater in summer than in winter, the relative humidity of the outdoor air in summer is higher than that in winter
Since outdoor temperatures in summer are higher than those in winter, the ideal gas law indicates that the saturation vapor pressure of water vapor is greater in summer than in winter. Therefore, the relative humidity of outdoor air is higher in summer than in winter.
Since the outdoor temperature in summer is higher than that in winter, and according to the gas law of states the saturated vapor pressure of water vapor is greater in summer than in winter, the relative humidity of the outdoor air in summer is higher than that in winter
PV=nRT, with R, n, and V remaining constant (n is the number of gas molecules, which remains unchanged)； V is the volume of the gas; due to the extremely large distances between gas molecules, the effect of thermal expansion and contraction is not significant, so it can be assumed that V remains constant. In summer, when the temperature is high, T is large, and consequently P is also large – that is, the partial pressure of water vapor is high. Since relative humidity = vapor pressure / saturated vapor pressure, it can be seen that the relative humidity is high in summer.
Since the outdoor temperature is higher in summer than in winter, and according to the gas law, the saturated vapor pressure of water vapor is greater in summer than in winter; therefore, the relative humidity of the outdoor air is higher in summer than in winter.