Rolled up hemp mass desiccation in field conditions by solar radiation
2015
Zagorska, V., Latvia Univ. of Agriculture, Jelgava (Latvia) | Putans, H., Latvia Univ. of Agriculture, Jelgava (Latvia) | Pelece, I., Latvia Univ. of Agriculture, Jelgava (Latvia) | Ziemelis, I., Latvia Univ. of Agriculture, Jelgava (Latvia)
According to the present technology in Latvia hemp is harvested in August. After cutting and some predrying on a field the hemp mass is rolled up, the rolls put in stacks and blown by the atmosphere air using a ventilator. Drying from outside to inside is ineffective. The objective of our research is to intensify and speed up the desiccation process by putting the rolls on special vertical perforated tubes of the desiccation device. The tubes have openings in their walls. The atmosphere air blown by the ventilator goes through the tube openings and makes the hemp mass desiccated from the rolls inside to outside, what is more cost-effective. The perforated desiccation tubes are made with gradual decrease of the opening area from the tube bottom to the top. The work of the device was tested in field conditions by desiccating a hemp roll. For the ventilator operation electricity was produced by a thin film solar energy battery, but hot air to intensify the desiccation process was obtained by the use of the solar air heating collector with a reflector.
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