Methane value measuring device and methane value calculation method

摘要

【Theme】 The fuel properties of natural gas used as fuel gas can be monitored directly and in real time, and a methane value with tentative reliability can be easily obtained regardless of the gas composition, and it is compact and lightweight suitable for in-vehicle use. Provided is a methane value measuring device and a methane value calculation method that realizes low cost and low price. SOLUTION: The methane value measuring device 10 includes a heat conductivity-converted calorific value measuring means 12 capable of measuring the calorific value obtained from the thermal conductivity of the target gas, the basic calorific value of the target gas calculated based on the calorific value, and the nitrogen gas in the target gas. A methane value calculating means 16 for calculating the methane value of the target gas based on the concentration is provided. [Selection diagram] Fig. 1