Mass Flow Rate Measurement of Anhydrous Ammonia to a Single Knife on an Applicator Using a Simple Thermodynamic Model

A simple thermodynamic model with temperature and volumetric flow ratemeasurements was developed to determine the mass flow rate of anhydrous ammonia (NH3)to a single knife on an applicator while operating in the field. The model did not predict themass flow rate well. One possible reason for the model failure was the poor calibration of thevolumetric flow meter. Also, the paddlewheel flow meter d…