METHOD OF DETERMINATION OF DEW-POINT TEMPERATURE Russian patent published in 2002 - IPC

FIELD: determination of humidity of gas, natural gas inclusive by method of determination of dew-point temperature. SUBSTANCE: method is based on recording temperature at moment of beginning of dew formation on cooled mirror; thickness of film "d: of condensate falling on mirror during one and the same time at three or more temperature points ((T_P>T₁>T₂>T₃),) which are below dew-point temperature by several degrees. Practically, it is easier to use change of any other parameter proportional to thickness of film of separated condensate (for example, change in intensity of light reflected from mirror ΔI~d after appearance of condensate on mirror). At processing the curve thus obtained, temperature at which thickness of film of separated condensate is equal to zero is found; said temperature is considered to be the dew-point temperature. Since process of determination of dew-point temperature uses quantitative data obtained in area where effect of condensation is considerable ((Tp>T1>T2>T3),) using three or more points, accuracy of determination of dew-point temperature is essentially enhanced as compared with standard method by beginning of sweating of mirror. EFFECT: enhanced accuracy of determination. 2 dwg