Sustainable Dairy Industry by Using Renewable Energy Source

Abstract

Renewable energy system is a crucial issue for sustainable development.  Thermodynamic analysis, especially exergy analysis plays an important role to evaluate sustainability of the industrial processing systems. Food production industry is one of the energy consuming sectors and dairy industry could be placed at one of the top substantial amount of energy consuming food industry segments. Hence, in this study, thermodynamic analysis of a milk pasteurization system assisted by a renewable energy resource -geothermal energy was investigated. In this regard, for the pasteurization of 1 kg/s milk at 76°C the required pasteurization capacity was 21.88 kW. In case of using geothermal fluid at 100°C the exergetic efficiency of the whole system was computed 71.05% as the first law efficiency and 56.81% as second law efficiency, respectively. According to the exergy analysis the biggest exergy destruction rate was seen in the absorber as 4.577 kW. Additionally, in order to develop the system’ efficiency the optimum operating conditions of the system components were determined such as absorber, condenser, evaporator, heat exchanger.

Keywords

• Energy,Exergy,Geothermal Energy,Milk Pasteurization,Optimization

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