A dew point is a temperature at which water vapor condenses and forms droplets. It is defined as the temperature at which the relative humidity reaches 100% at a given pressure. The comfort dew point is the temperature at which a person feels comfortable. This temperature is typically around 68 degrees Fahrenheit. The uncomfortable dew point is the temperature at which a person feels uncomfortable. This temperature is typically around 78 degrees Fahrenheit. The Dew point can have the highest value when the dew point temperature is equal to the current dry bulb temperature. when the dew point is equal to the dry bulb temperature then relative humidity will be 100%.
The dew point is the temperature at which the air becomes saturated with water vapor. In other words, it is the point at which the concentration of water vapor in the air is the same as the concentration of water vapor in a saturated solution. A saturated solution is one that has reached equilibrium. The dew point is determined by the relative humidity (RH) of the air and the temperature. The Dew point can also be found by using a hygrometric table.
An alternative way of determining the dew point is to measure the actual air temperature and use the following equation: T=R*P*(Cp-Cv)/(Cp-Cv-Ra) where T is the air temperature, R is the gas constant, P is the pressure of the air, Cp is the specific heat of water at constant pressure, Cv is the specific heat of water at constant volume, and Ra is the specific heat of air.
The dew point can also be found using the following equation: T=T0+Ln[RH/(100−RH)] where T is the actual air temperature, T0 is the temperature at which the RH is 100%, L is the slope of the vapor pressure curve, and RH is the relative humidity of the air.