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|e ppiak
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|a Raič, Matej Nikola
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|a Izrada PV-RO membranskog sustava za pročišćavanje slanaste vode :
|b diplomski rad /
|c Matej Nikola Raič ; [mentor Krešimir Trontl].
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|a Build up the PV-RO membrane system for brackish water desalination
|i Naslov na engleskom:
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|a Zagreb,
|b M. Raič,
|c 2016.
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|a 71 str. ;
|c 30 cm +
|e CD-ROM
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|b diplomski studij
|c Fakultet elektrotehnike i računarstva u Zagrebu
|g smjer: Elektroenergetika, šifra smjera: 47, datum predaje: 2016-07-01, datum završetka: 2016-09-19
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|a Sažetak na hrvatskom: Cilj ovog diplomskog rada je unaprijediti PV-RO sustav pročišćavanja slanaste vode koji se sastoji od solarnih panela, pumpe i RO membrane. U prvom dijelu rada fokus je na definiranju idealnog usmjerenja i nagiba solarnih panela sa svrhom maksimiziranja vremena tokom dana u kojem solarni paneli proizvode dovoljno snage za pokretanje pumpe. Pretpostavljalo se da će to biti ostvareno paralelnim spajanjem polovice solarnih panela usmjerenih prema istoku te polovice usmjerenih prema zapadu. Time bi se povećala izlazna snaga tijekom jutarnjih i večernjih sati, a smanjila tijekom vršnih sati.
Analiza izlazne snage je provedena u Excelu na različitim lokacijama, nagibima solarnih panela, usmjerenjima i danima kroz godinu. Izračun pokazuje da neovisno o lokaciji, solarni paneli koji su usmjereni prema istoku i zapadu mogu povećati vrijeme rada tijekom ljetnih perioda za 20%, no tijekom zimskih perioda gubici su veći od 50%. Zaključeno je da je tokom godine maksimalno vrijeme rada ostvareno sa solarnim panelima usmjerenim prema sjeveru u južnoj hemisferi, odnosno prema jugu u sjevernoj hemisferi uz nagib panela jednak geografskoj širini.
Drugi dio rada obuhvaća dizajniranje DC/DC konvertera s kontrolom punjenja i pražnjenja superkondenzatora kako bi napajali pumpu tijekom fluktuacija snage i kratkotrajnih prekida napajanja. Eksperimenti pokazuju da sustav može napajati pumpu tijekom prekida do najviše 2:20 minuta. Budući da većina prekida traje kraće od minute, predloženi sustav može poboljšati efikasnost konvencionalno PV-RO sustava pročišćavanja slanaste vode.
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|a Sažetak na engleskom: The aim of this thesis is to improve PV-RO water treatment system that consists of solar panels, a pump and a RO membrane. The first part of the thesis is focused on defining the ideal facing direction and tilt angle of solar panels in order to maximize the time throughout the day when solar panels produce enough energy to run the pump. It was assumed that it would be maximized with parallel circuit of half solar panels facing towards east and half towards west that would increase their power output during morning and evening hours and decrease during peak hours.
The power output’s examination was conducted in Excel on various location latitudes and longitudes, solar module tilt angles, facing directions and days throughout the year. The calculation demonstrated independently on the location that solar panels facing east and west can increase operation hours in summer periods by 20%, but during winter periods losses are greater than 50%. It was concluded that throughout the year the maximal operating time is achieved with solar panels facing directly to the north in the southern hemisphere and directly to the south in the northern hemisphere with a tilt equal to the latitude.
The second part of this thesis is designing a DC/DC converter with charge control for charging and discharging supercapacitors in order to supply the pump during power fluctuations and short term intermittent periods. The experiments showed that the system can supply a pump during intermittent periods up to 2:20 minutes, while the majority of intermittent periods last less than a minute. Therefore, this system can improve the efficiency of a standard PV-RO water treatment system.
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|a DC/DC konvertor, kontrola punjenja, superkondenzator
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|a charge control, DC/DC converter, supercapacitor
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|a Trontl, Krešimir
|4 ths
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