© copyright Faculty of Engineering – Hunedoara, University POLITEHNICA Timisoara ACTA TECHNICA CORVINIENSIS – Bulletin of Engineering Tome IX [2016] , Fascicule 2 [April – June] ISSN: 2067 – 3809 1. Aleksandar AŠONJA, 2. Danilo MIKIĆ, 3. Jasmina PEKEZ POSSIBILITY OF APPLICATION OF SOLAR PUMPS IN IRRIGATION 1. Association of Intellectuals for Development of Science in Serbia, “Serbian Academic Center”, Novi Sad, SERBIA 2. University of Novi Sad, Technical Faculty “Mihajlo Pupin”, Zrenjanin, SERBIA Abstract: Today, is very often, especially where there is no indented city water supply network, on smaller agricultural areas, farms and the like. for irrigation use solar pumps. The paper deals with the problem of dimensioning of solar pumps in irrigation. For irrigation needs, the paper analyzed the solar pump of smaller capacity which are intended for watering of small agricultural areas, such as those in greenhouses, etc. Keywords: The solar panel, the sun, irrigation, agriculture INTRODUCTION In the Republic of Serbia today is about 40% of arable land, while the region of Vojvodina has 1.78 million ha of fertile arable land, of which only 28% is irrigated. [1] In stated problem lies an enormous research task, which consists of increasing the surface area that could be irrigate, and that energy that would have initiated such systems is renewable. Demand for water is greater the very sandy, particularly windy and southern positions than on the structural soils of the northern exposition [2]. Schedule of moisture on the surface of the earth is far more complex than the layout of heat and light. Moisture, particularly in the form of water, plays an important role in the life of plant species, because it is a requirement for many the life processes who can not imagined without the participation of water. It is considered that moisture is one of the most important herbal ecological factors, far more influential than light and heat, because the diversity of flora and its a geographical layout usually depends on the just from the schedule moisture. While the sun's rays directly receive to biomass, moisture (rain, snow) receiving himself through the land. It occurs in the form of air humidity and of atmospheric deposition [3]. Plants in themselves contain up to 95% water, but by far is higher amount of water which pass through herbal organism. The evaporation of water from plants is called transpiration, and it is of unusual importance, because it is conveyed by way of water. The relationship between taking water from the soil and allocations via the leaves called water balance of plants. It is normal that the water balance is in equilibrium, but often occur under the influence of heat, to violate this occurs and the water deficit which may be from 5 to 10 and up to 30% without any damage to the herbal organism. When this lack of exceeds a certain limit, then the plants are showing the first signs of wilting, ie. loses turgor and leaves were due to wilt wither, which can be permanently or temporary. POSSIBILITY OF PRODUCTION ENERGY ON AGRICULTURAL OF LAND For centuries, the sunlight is applied to produce food for humans. However, in 1970 - in those years they began to applied by solar photovoltaic panels, very often i on arable the agricultural land. This was one of the disadvantages of this form of renewable energy source, because he disturbed yields in agriculture. Architecture and technologies of solar panels over time in sophistication, so that they used today and lands that are used agricultural production. The goal of contemporary of agricultural production is that the produce food and electricity at the same time. Such plants could provide additional sources of income for agricultural producers. By selecting of adequate of agricultural crops submitted by the of, seed, the same would be protected obscuring of: sun and high temperatures (which last year recorded an increase) heavy rainfalls, of the winds, hail and the like. SOLAR PLANT IN IRRIGATION In recent years, about 30% of users of solar energy in agriculture uses the sun to drive irrigation pumps, but this trend is changing rapidly in favor of those farmers who of their installation linked to the power