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Energy consumption of manual wheat grinding
 Mařík, Vojtěch ; Hora, Martin (advisor) ; Sládek, Vladimír (referee)
In this thesis, the energy consumption during manual wheat grinding was investigated using two historically widespread and important technologies for grain grinding, namely the saddle quern and the rotary quern. This energy consumption was also compared to some anthropometric parameters of the grinding human. The method of indirect calorimetry using Cosmed K5 was used to measure energy expenditure. Bioimpedance scale InBody270 and basic anthropometric tools such as anthropometer and pelvimeter were used to determine selected body parameters.. The energy expenditure of grinding by the rotary quern was also measured by different movement patterns, namely unimanual clockwise and counter-clockwise rotation and bimanual counter-clockwise rotation. Energy expenditure was sampled on 30 women. It was found that although grinding on a saddle quern is an energetically less demanding activity compared to grinding on a rotary quern, significantly more energy is required to grind the same amount of cereal grains (297 kcal/kg grain vs. 109 kcal/kg grain). Clockwise milling was found to be the most energy-efficient variant of milling, while counter-clockwise milling was more energy demanding (clockwise milling 5.48  1.13 kcal/min vs. counter-clockwise milling 6.21  0.87 kcal/min). Anthropometric parameters...
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