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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Transient thermal load evaluation of refrigerated cargo compartments
Submission Author:
Diogo Lôndero Da Silva , SC
Co-Authors:
Igor dos Santos Soares Pinto, Diogo Lôndero Da Silva
Presenter: Igor dos Santos Soares Pinto
doi://10.26678/ABCM.ENCIT2020.CIT20-0191
Abstract
The transport of refrigerated cargo, as food products, is one of the steps in the cold supply chain and a vital operation for the contemporary society. For instance, in 2019, the Brazilian exports of fresh chilled and frozen beef was responsible for the turnover of US$ 6.546 billion, which represents 3% of the national exports. To maintain the temperature inside the compartment within acceptable levels, without compromising energy consumption targets, the refrigeration system and the cargo compartment must be carefully designed. Moreover, the thermal load of a cargo compartment is also affected by transient ambient conditions, such as external temperature and solar irradiation. For these reasons, this work aims to implement a mathematical model capable of predicting the transient thermal load in refrigerated compartments cargo. The mathematical model is based on the first law of thermodynamics and the fundamentals of heat transfer. It allows to evaluate how the physical and constructive parameters of the refrigerated cargo compartment influence the thermal load, which is required for an energy efficient design. The results show the transient thermal load and energy consumption for different insulation thicknesses and paint absorptivities, showing differences up to 45%. In addition, the mathematical model was used to investigate how different parameters affect the minimal internal temperature achieved by the refrigeration system and its fuel consumption.
Keywords
refrigerated cargo compartment, transient thermal load, energy performance
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