| 摘要 |
A combustionless BTU meter utilizes Nuclear Magnetic Resonance (NMR) spectroscopy with a (RF) radio-frequency transducer (4) and permanent magnet (3) in a measurement chamber (17) to measure the concentrations of the component parts of a heterogeneous gas. Measurement of the gas component concentrations allow for subsequent calculations of British Thermal Unit / Cubic Foot (BTU/CF) from the measured gas component parts via a computer section, analog measurement section and RF/FID (flame ionization detector) signal processing section on a main printed circuit board (PCB). Static pressure and temperature are also measured via installation of a temperature sensor (1) and pressure transducer (2). Gas concentrations are preferably combined with static pressure and temperature, to calculate other characteristics of British Thermal Unit / Pound (BTU/lb), molar mass, relative density, and absolute gas density. A method for measuring heat production is also disclosed.
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