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The application of photovoltaic cells as an alternative power supply for small HVAC systems

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Porzuczek J.
Czasopismo Techniczne
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-
PL
his paper presents selected aspects of an alternative power supply for small HVAC systems. The application of a system based on photovoltaic cells together with energy accumulation in VRLA gel batteries was analysed. The results were obtained using laboratory installation and were compared with the predicted data.
2
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Applications of Electrical Capacitance Tomography for Research on Phenomena Occurring in the Fluidised Bed Reactors

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Porzuczek J.
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vol. 35
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issue 4
397-408
EN
The paper presents a review of current achievements in the Electrical Capacitance Tomography (ECT) in relation to its possible applications in the study of phenomena occurring in fluidised bed reactors. Reactors of that kind are being increasingly used in chemical engineering, energetics (fluidised bed boilers) or industrial dryers. However, not all phenomena in the fluidised bed have been thoroughly understood. This results in the need to explore and develop new research methods. Various aspects of ECT operation and data processing are described with their applicability in scientific research. The idea for investigation of temperature distribution in the fluidised bed, using multimodal tomography, is also introduced. Metrological requirements of process tomography such as sensitivity, resolution, and speed of data acquiring are noted.
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Dynamic model identification of the low-power fluidized bed boiler

100%
Porzuczek J.
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PL
The paper presents results of the identification of the multivariable model of the fluidized bed boiler derived in the form of transfer function matrix. Conditions of the experiment that ensure the identifiability of model dynamics while limiting the risk of emergency boiler shutdown was proposed. Typical disturbances of the combustion process including division into measurable and immeasurable ones as well as the method to identify the impact of these disturbances on the outputs of the model was formulated. Possible application of the model in the model-based controllers such as predictive or adaptive IMC (Internal Model Control) was indicated.
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