Efficiency of the electric energy consumption of an indoor farm by focusing on optimized lighting strategies

Several lighting strategies in an indoor farm are compared regarding the annual electrical energy consumption. Based on measurements of the energy consumption during one experiment, conducted inside the indoor farm at the HSWT, an energy balancing model was calibrated and subsequently validated by a second experiment. The model was then used to calculate the potential reduction of the annual electrical energy consumption concerning several different lighting strategies. Furthermore, different settings of temperature set points and the impact of an optimized heat transfer coefficient as well as a more efficient performance for heating and cooling are considered. The measured and the modeled energy consumption and the values regained by the model showed a high regression coefficient (R2=0.936). The prediction of the energy consumption during the second experiment was also possible (R2=0.738) with a total difference to the measured consumption of 29.1 kWh. Regarding the given technical settings of the indoor farm, the annual electrical energy consumption can be reduced by up to 16% by an adjustment of the temperature strategy while reaching a similar yield. By assuming an optimized technical setting, the relevance of the lighting strategy increased significantly. Based upon this an annual reduction of the electrical energy consumption of up to 21% seemed conceivable.

Publikationsart
Beiträge zu wissenschaftlicher Konferenz/Tagung
Titel
Efficiency of the electric energy consumption of an indoor farm by focusing on optimized lighting strategies
Medien
Acta Horticulturae
Band
ISHS 2022
Artikelnummer
1337
Herausgeber
ISHS, Eds.:K.-J. Bergstrand and M.T. Naznin
Seiten
73-79
Veröffentlichungsdatum
15.04.2022
Zitation
Wittmann, Sabine; Jüttner, Ivonne; Liedl, Petra; Mempel, Heike Susanne (2022): Efficiency of the electric energy consumption of an indoor farm by focusing on optimized lighting strategies. Acta Horticulturae ISHS 2022, 1337, S. 73-79. DOI: 10.17660/ActaHortic.2022.1335.86