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Browsing by Author "Pires, Eduardo S."

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  • Automation and control of the SORTEGEL wastewater plant
    Publication . Araújo, João Paulo; Cunha, José Boaventura; Oliveira, Paulo de Moura; Pires, Eduardo S.; Coelho, João Paulo
    Food Processing Industries produce large amounts of wastewater with high environmental impact. Due to the high content of suspended matter and inadequate pH value of the wastewater, national laws prohibit direct discharges of the influent to the environment. This work describes the design and operation of a wastewater treatment plant installed in the Sortegel food-processing company located in Sortes, Portugal. This industry uses the water collected from groundwater wells to process raw materials and to wash the equipments, being the volume of wastewater produced season dependent (80 to 300m3/day). Results show that the implemented wastewater treatment plant and the automation solutions generate treated effluents that comply with the Portuguese legislation.
    2010Conference paper Restricted access Show more
  • Greenhouse heat load prediction using a support vector regression model
    Publication . Coelho, João Paulo; Cunha, José Boaventura; Oliveira, Paulo de Moura; Pires, Eduardo S.
    Modern greenhouse climate controllers are based on models in order to simulate and predict the greenhouse environment behaviour. These models must be able to describe indoor climate process dynamics, wchich are a function of the both the control actions taken and the outside climate. Moreover, if predictive or feedforward control techniques are to be applied, it is necessary to employ models to describe and predict the weather. From all the climate variables, solar radiation is the one with greater impact in the greenhouse heat load. Hence, making good predictions of this physical quantity is of extreme importance. In this paper, the solar radiation is represented as a time-series and a support vector regression model is used to make long term predictions. Results are compared with the ones achieved by using other type of models, both linear and non-linear.
    2010Conference paper Restricted access Show more