Abstract
Timely monitoring of the calorific value of coal is beneficial to combustion regulation during the operation of coal-fired power plants. An in-situ measurement system applied to power plants was proposed. The related model was described in detail and validated through bomb calorimetry. The influences of multiple model parameters with different thermometer and flowmeter accuracy on measurement time and uncertainty have been analyzed. Measurement properties of the bomb calorimeter and this improved calorimeter were compared at different conditions. The results reveal the increases in the gas volume flow rate and the water mass flow rate have a positive effect on measurement time while coal mass and the mass ratio of water in two cylinders show a negative effect. Relative standard uncertainties are reduced to some extent with all of these factors. It is evidenced the proposed calorimeter has the potential for fuel calorific value monitor for power plant operation optimization.
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