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Two circular electrical capacitance tomography (ECT) sensors have been designed and used to monitor the solids flow in a cold circulating fluidised bed (CFB) with an external heat exchanger (EHE). The ECT sensors have eight electrodes and were mounted in the side tube and return tube above the EHE via pneumatically controlled loop seal respectively. Dynamics test with different process conditions...
Most existing electrical capacitance tomography (ECT) systems are designed using a 19" Eurocase and they are relatively expensive. To reduce the size and cost, a compact ECT system has been developed. It is based on a charge/discharge capacitance measuring circuit and a USB data acquisition (DAQ) unit from NI. It has 6 measurement channels and is housed in a box measuring 158times80times96 mm...
In this paper, the modeling and control of the moisture content of the particles in a batch fluidized bed dryer are studied. First, a lumped mechanistic model is developed to describe the heat and mass transfer between solid, gas and bubble phases and experimental validation shows that the model can be used to predict the particle moisture content and temperature profiles during the drying process...
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