Patent ID: 6539775
Filing Date: 2003-04-01
Classification: G01N

Abstract:
A method for determining the interchangeability factor of LPG/air mixtures with natural gas, the method comprising:using the electrical output signal from a gas density sensor and processing this signal together with user-supplied information about the LPG feedstock to calculate the Wobbe Index of the LPG/air mixture; offering the user a list of pre-defined LPG (propane/butane) mixtures with associated gas properties for LPG feedstock selection; offering the user the option to create a new LPG (propane/butane) mixture with automatic computation of the resulting gas properties for this new LPG feedstock; offering the user the option to enter detailed LPG feedstock information to be used by the invention, together with the signal from the gas density sensor, for the computation of the Wobbe Index; producing reliable, accurate, real-time information about the interchangeability of the LPG/air mixture with natural gas.