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  • 1.
    Petrov, Peter
    Mälardalen University, School of Business, Society and Engineering.
    Energieffektivisering av belysning för växthusodling2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This case study investigates how the biomass changes depending on changes made to the time interval for the lights and the distance between the crops and light. The study is split in three different cases and each case consists of three batches. The different baches have three different heights between the light and the crops and the heights being used is 55, 110 and 165cm. The light interval in the first case was 12 hours, 6 hours for case 2 and 3 hours for the last case. 

    Case 1 had an average biomass weight of 28,5 g, for batches 1-3 and the light interval was twelve hours. In case 1 and 2 the pea plants looked healthy and green but in case 2 the plants were taller, and the leaves had widened more. Case 2 had an average biomass weight of     55,5 g, for batches 4-6 when the interval of the lights was 6 hours. The last case generated the most biomass of all the cases with an average of 102,5 g for batches 7-9, and the plants was completely yellow. Case 2 compared to case 1 gave double biomass yield for the same amount of energy used. One-way Anova determined that it was not any statistically significant difference between the batches but, however, it was for the different cases. 

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