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Energy analysis of a solar system for heating and refrigeration in a dairy industrial application

A. Coca Ortegón 1, X. Felipe 2, J. Prieto 1 and A. Coronas 1

1 Univertisat Rovira i Virgili, CREVER, Department of Mechanical Engineering, Av. Païos Catalans, N°26, 43007, Tarragona, Spain.
2 Institut de Recerca i Tecnologia Agroalimentaria, IRTA, Monells, Spain.

Abstract

The potential use of solar energy in the food industry has been recognized in several studies, because the processes in this sector require heat moderate temperatures in comparison to others such as chemical, textile and paper industries, and also due to its economic and social relevance. In the dairy industry many studies have been focused on the separated production of heat or cold using solar technologies ; even in the processes that requires heat and refrigeration simultaneously, as it occurs in the pasteurization process. This work proposes and analyzes a specific energy system with solar technologies to supply the heat and cold required in pasteurization process in a typical small plant of pasteurized milk, by using the dynamic simulation software TRNSYS. The system is evaluated with a basic set of energy, environmental and economic indicators. The savings are calculated taking into account a reference system which uses conventional energy resources.

Keywords

Solar energy technology, Heating, Refrigeration, Pasteurization, Dairy sector.

Energy analysis of a solar system for heating and refrigeration in a dairy industrial application
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