03434cas a2200421 a 4500 20260818214234.0 110905s1981 th uu|m rtt 0| a1eng d .b10607833 AIT Thesis no.ET-81-10 Easwarakhanthan, Thirunavukarasu Small scale photovoltaic water pumping : direct-coupled systems driving centrifugal pumps Bangkok : Asian Institute of Technology, 1981 80 p. Thesis ; no. ET-81-10 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1981 A theoretical study, on photovoltaic pumping is undertaken to establish the most efficient direct- coupled system and to evaluate the relative merits of a system with a maximum power point tracker (MPPT) as an interfacing device, over the direct-coupled system. An experimental study on the performance of a direct-coupled system is carried out by setting up an installation of solar panels, direct-current permanent magnet motor and centrifugal pump. Using mathematical models of the system components, it is shown that the direct- current permanent magnet motor with centrifugal pump provides the best adaptation to the direct-coupled system. Further, a comparative simulated performance study shows that the system with MPPT starts pumping earlier than the direct- coup.1ed system and that it could pump even during cloudy atmospheres. Moreover, the simulation of daily flow, throughout a year, indicates that with MPPT, t he yearly flow increases by around 25% . The effect of an eventual sun tracking system is also considered in the theoretical studies. The experimental study carried out on t h e direct-coupled sys tern concludes that the system efficiency is between 3.2 and 4.1% for heads between 4.5 and 5.5 m, with the illumination levels above 600 W/m2 . The parameters of the regression models are obtained for the working curve of the system and for the characteristics of the pump, The performance curves are also given. Photovoltaic power generation Centrifugal pumps Follea, D., Chairperson Saunier, G.Y., Examination committee Walter, Despiegelaere, Ir., Examination Committee The Government of United Kingdom, Scholarship Donor Asian Institute of Technology. Thesis ; no. ET-81-10 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21578 .b10607833 mnait u 250103 2 951012 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050003103263 CREATED : 1995-10-15 RECORD # : i10770124 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003103271 CREATED : 1995-10-15 RECORD # : i10770136 LPATRON : 1016964 LCHKIN : 2004-12-17 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050120352272 CREATED : 2016-10-06 RECORD # : i1303201x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 107763 107763 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no.ET-81-10 30050003103263 2026-08-18 21:42:34 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no.ET-81-10 30050003103271 2026-08-18 21:42:34 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ET-81-10 30050120352272 2026-08-18 21:42:34 2026-08-18 40