Modelagem de um sistema de cogeração com motor a diesel integrado a unidade de dessalinização multi-efeito

Abstract

This study aims to develop a mathematical modelation, with the aid of the Engineering Equation Solver (EES) software, of an energy cogeneration system. Reusing the energy that would be lost by the combustion gases in the energy generation process with a diesel engine, in a multi-effect desalination system with a thermocompressor (MED-TVC). For this, existing equations were used to define some variables presented in bibliographies, but addressing some different steps such as: modeling by the pressure of the effects in place of temperature, taking into account the differents boiling point elevation (BPE) and the heat lost by the brines that leave the effects. Even with a different approach, the results are approximated with comparatives studies as Ahmadia et al. (2020). Although the modelation works, the proposed 3-effect system, even with a gain output ration (GOR) of 4,072, it presented a very small production of distilled water of 90,9 kg/h compared to studies as Ahmadia et al. (2020) and Al-Mutaz e Wazeer (2014), which can be explained by the low mass flow of gases available from an engine diesel.