Project / Uniwersytet Przyrodniczy we Wrocławiu

2018-2019

Leader investigator of the task: prof. dr hab. inż. Adam Figiel

Investigators: dr hab. inż. Roman Stopa, prof. uczelni, dr hab. inż. Piotr Komarnicki, mgr inż. Monika Słupska

Summary:Market analysis showed that in the world cranberries are produced in areas where there is no problem with a small amount of water (swamp areas, peat substrate). American cranberry products such as juice, concentrate, and sweetened dried berries are available on the international market. Most of the plantations are concentrated in North America. The main reason for the increase in production is the growing demand on world markets. The demand is generated mainly by the processing sector. There is no tradition in the cultivation of this plant in Europe, although the demand for its products increases due to the growing interest in pro-health food. However, its strong brake is the price of cranberry products related to the need to import fruit from America. There are only a few large cranberry commercial plantations in the EU. The largest of them (20 ha) are located in Latvia. They are established in peat bogs where the natural soil and water conditions favor this cultivation on a medium scale. Another plantation of about 15 ha is located in Germany - it was established on podzolic soils, poor in water and nutrients - it is a definite blockade in terms of increasing the cultivation area despite the growing market needs. The dissemination and implementation of the result of the operation may be an opportunity not only for Polish farmers but also for foreign farmers to establish new or enlarge the existing cranberry plantations.

Keywords: plant production and horticulture, fruit growing, cultivation (plant production), soil management technology, local state, water

Internal project (No. PT / 359/2014 / S.C.)

Leader investigator of the task: dr hab. inż. Piotr Komarnicki

Summary:The aim was to present the influence of dynamic loads on the fruit sensitivity to bruising at variable values of the drop height and the number of impacts. The work focuses on the experimental procedure aimed at quantifying the damage to fruit depending on the changes in surface pressures occurring under impact loads.

Keywords:impact load, apple, pressure

National Science Center project (N N313 789940)
2011-2014

Leader investigator of the task: prof. dr hab. inż. Leszek Romański

Investigators: prof. dr hab. inż. Jerzy Bieniek, dr hab. inż. Piotr Komarnicki, dr hab. inż. Jerzy Detyna

Summary: The scientific goal of the project was to determine the phenomena occurring during the operation of a wind turbine equipped with two propellers rotating in opposite directions in terms of the power generated by the power generator driven by them. During testing the structure, the ecological aspect of the solution was also taken into account, as it should be characterized by low noise. Actions were taken (changing the shape or surface of the airfoil) to lower it, so that the permissible noise of 55 dB was recorded at a distance of up to 10 m from the engine room. The final result of the study was the construction of a mathematical model enabling simulation calculations of the power obtained by a wind turbine with a specific profile of propeller blades. The model takes into account parameters such as: air stream velocity and its density, propeller diameter, distance between the propellers, blade angle of attack.

Keywords: wind turbine, propeller, generator, stream of air

project number N N 310 435938

2009-2011

Leader investigator of the task: prof. Dr Cezary Kabala