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  • Author: Jan Marczuk x
  • Mechanical Engineering x
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Determination of Optimal Geometric Parameters of the Windshield Device Limiting the Spray Drift by Wind in Herbicides Spraying

Abstract

The objective of the paper is to determine the optimal geometric parameters of the windshield device limiting the spray drift by wind in herbicides spraying. Tests were carried out with the use of the planning methods of experiments and statistical methods of processing of the obtained results. The result of the research consisted in obtaining structural parameters of the windshield made in the shape of gratings with rectangular boards. It was found out that this device may be used at the wind speed exceeding agrotechnological sizes. The research results will be used in the work on devices protecting against wind at a precise herbicides spraying.

Open access
New Developments of Solar Energy Utilization in the Aspect of EU Directives

Abstract

Photovoltaic systems are very efficient concerning proper utilization of solar radiation. However, the nanotechnology solution can replace the photovoltaic by the use of new production technology to lower the price of solar cells to one tenth. Sun provides nearly unlimited energy resource, but existing solar energy harvesting technologies are quite expensive and cannot compete with fossil fuels. The central part of Poland, which represents about 50 percent of the area, gives solar radiation at the level of 1000 kWh·m−2/year. Other new developments, which can help improve existing efficiency of solar systems are: diatoms utilization, artificial photosynthesis, nanoleaves and rotation solar towers.

Open access
Development of New Technologies for Cattle Breeding Systems Taking Into Account Sustainable Environmental Conditions

Abstract

Properly designed housing buildings, with regard to reduction of a negative influence on environment, are necessary for ensuring sustainable development in agriculture. The objective of this paper was to show the results of environmental conditions research on high milk yield dairy cattle in different housing systems. Temperature and relative humidity of air and concentrations of harmful gases − ammonia and carbon dioxide accompanying them were investigated.

Open access