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the solar array added about 20 % to the overall cost, considering the longev- ity of solar modules compared to the continuous costs for diesel or grid-pow- er, solar still remained the most favor- able and cost-effective solution. Deere Run Farms is located in an area of low rolling hills and valleys. Water is pumped from the wells in the valley, up the hillside about 60 m, to where the water is stored in a 1,325 m3 con- crete cistern. Using 4,900 Wp solar ar- rays, two LORENTZ pumps are used, which can together lift over 92 m3 per day (yearly average) up the hill and into the cistern. From the cistern an addi- tional LORENTZ pump is used to pres- surize the drip irrigation on 12 hectares of 2-month-old vines, with an addition- al lift of 6 m. While it was possible to pump direct- ly from the well, up the hill, and into the drip system, Mr. Peters opted to imple- ment a cistern for additional benefits including storing a large volume of wa- ter and gravity feeding for irrigation of the lower parts of the vineyard. Future developments at the site including bot- tling facilities and a house will be able to benefit from the stored water. Mr. Peters also opted to integrate back- up power accessories with his LORENTZ systems. The use of the LORENTZ AC Power Packs allows both the poten- tial to boost the production of his sys- tem in the event of inclement weather or atmospheric attenuation, or to pump outside of sunlight hours if necessary. Whenever this may be the case a die- sel generator will provide power to the Power Pack, which converts the power to DC for the pump systems. Upper planting zones partly above the cistern 4 hectares 750 plants per ac pressurised drip irrigation PS4000 C-SJ17-4 pumps at up to 25 m3/h 6 m uphill from the cistern to the upper part of the vineyard Cistern 1,325 m3 PS4000 Controller PV Generator 28 PV modules, together 4.9 kWp on a single custom fixed-ground-mount rack Lower planting zones below the cistern 8 hectares 750 plants per ac drip irrigation by gravity flow and additional pressure from the cistern pump to ensure even distribution 2x PS4000 Controller 2x PS4000 C-SJ5-25 each providing up to 92 m3/day pumping the water up from a 18 m deep well then 60 m up the hill 2 sets of PV generators 2x 28 PV modules, together 9.8 kWp on 8 fixed-pole-mount racks “LORENTZ has more pumps to choose from, especially for high- er lift and volume. Other solar- pumps seem limited in scope - more for domestic use.” – Tom Peters BERNT LORENTZ GmbH & Co. KG Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29, www.lorentz.de Errors excepted and possible alterations without prior notice. Sun. Water. Life. v111109PDF Image | Solar-powered Water Pumping for Vineyard Irrigation
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