Paper Conference

Proceedings of BSA Conference 2017: Third Conference of IBPSA-Italy


Comparison Between Simplified and Detailed Methods for the Calculation of Heating and Cooling Energy Needs of Livestock Housing: A Case Study

Andrea Costantino, Ilaria Ballarini, Enrico Fabrizio

Abstract: Climate control (heating, cooling, and ventilation) is an important aspect of animal production, since the zootechnical performance and the health of reared animals are strongly related to their comfort conditions. Currently, there are neither specific protocols nor commercial tools to estimate the energy use for climate control in a livestock housing. In this work (in the context of a funded project called EPAnHaus) three different energy simulation methods (QS: quasi-steady-state method, SH: simple hourly dynamic method, DD: detailed dynamic method), in compliance with the ISO 13790 standard, are applied to a broiler house. The aim of the work is to verify which method is more suitable to be applied for the estimation of heating and cooling energy needs of the animal house. A study was carried out to make consistent boundary conditions between the analysed models. In the comparison of the results, the variability of the boundary conditions is not represented in QS model, resulting in considerable overestimations of the heating energy needs in the colder months (January, February, and December), it does not consider the simultaneity of heating and cooling needs during some months (February and March). Dynamic models (SH and DD models) correctly describe the thermal behavior of the analyzed building, in particular the trend of heating and cooling loads during the production cycles, and the temperature trend during empty periods. It should be noted that the energy need for cooling is only theoretical since usually free cooling is provided by increased ventilation instead of mechanical cooling. Further analysis and comparison with measured data may therefore be carried out once the performance and the energy use of ventilation fans in the house are modelled.
Pages: 193 - 200