초록 ▼

A method for determining the relative humidity of a volume V of air having a temperature of 100° C. or greater. The method comprises the steps of measuring the temperature TVof the volume of air and determining from that temperature the saturation vapor pressure psat(V) of the volume of air; collect

A method for determining the relative humidity of a volume V of air having a temperature of 100° C. or greater. The method comprises the steps of measuring the temperature TVof the volume of air and determining from that temperature the saturation vapor pressure psat(V) of the volume of air; collecting from the volume of air a sample volume S of air and cooling it to a temperature TSbelow 100° C., but above the dew point of the sample volume of air; determining from the temperature TSthe saturation vapor pressure psat(S) of the cooled sample volume of air; determining the relative humidity RHSof the sample volume of air from TSand from the wet bulb temperature of the sample of air; and performing the calculation RHV=RHS×psat(S) /psat(V) to obtain a relative humidity RHVof the volume of air.

대표청구항 ▼

1. A method for determining the relative humidity of a volume V of air having a temperature of 100° C. or greater, said method comprising the steps of: a) measuring the temperature TVof said volume of air; b) determining from said temperature TVthe saturation vapor pressure psat(V) of said volum

1. A method for determining the relative humidity of a volume V of air having a temperature of 100° C. or greater, said method comprising the steps of: a) measuring the temperature TVof said volume of air; b) determining from said temperature TVthe saturation vapor pressure psat(V) of said volume of air; c) collecting from said volume of air a sample volume S of air; d) cooling said sample volume of air to a temperature TSbelow 100° C., but above the dew point of said sample volume of air; e) determining from said temperature TSthe saturation vapor pressure psat(S) of said cooled sample volume of air; f) determining the relative humidity RHSof said sample volume of air; and g) performing the calculation RHV=RHS×psat(S) /psat(V) to obtain a relative humidity RHVof said volume of air. 2. The method of claim 1 wherein the step of determining the relative humidity RHSof said sample volume of air comprises measuring the wet bulb temperature of said sample volume of air and determining said relative humidity from said temperature TSand from said wet bulb temperature. 3. The method of claim 2 further comprising the final step of returning said sample volume of air to said volume of air. 4. The method of claim 2 further comprising the final step of venting said sample volume of air to the atmosphere. 5. The method of claim 1, wherein said method is used to determine the relative humidity of the air within a wood veneer dryer.