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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Modelovanje mehanizma prenosa toplote pri konvektivnom sušenju i utvrđivanje numeričkih pokazatelja / Analysis of energy characteristics of pneumatics dryers, from the standpoint of the development of convective drying method

Prvulović Slavica 20 May 2004 (has links)
<p style="text-align: justify">Doktorska disertacija &quot;Modelovanje mehanizma prenosa toplote pri konvektivnom su&scaron;enju i utvrđivanje numeričkih pokazatelja&quot; - sadrž i eksperimentalna i teorijska istraživanja vezana za metodu konvektivnog su&scaron;enja. Izvr&scaron;ena su istraživanja parametara sistema konvektivne pneumatske su&scaron;are u eksploatacionim uslovima proizvodnje. Na osnovu rezultata ispitivanja utvrđeni su: modeli kinetike su&scaron;enja, energetski bilansi, koeficijenti prenosa toplote, optimalni režim su&scaron;enja, modeli mehanizma prenosa toplote, numerički pokazatelji i izvr&scaron;ena njihova analiza.</p> / <p>PhD Thesis &quot;Modelling the mechanism for heat<br />transfer at the convective drying and establishing of<br />numerical readers&quot; - contains the experimental and<br />theoretical researches connected with the convective<br />drying method. The parameter researches of the<br />convective pneumatic dryer system in the<br />exploitation conditions in production, are done. On<br />the basis of the testing results are established: the<br />models of drying kinetics, energetic bilances, heat<br />transfer coefficients, optimal regime of drying, heat<br />transfer models mechanism, numerical readers and<br />there was also realized their analysis.</p>
2

Modeliranje energetskih karakteristika dvostrukih ventilisanih fasada / MODELLING OF THE ENERGY CHARACTERISTICS OF A NATURALLY VENTILATED DOUBLE SKIN FACADE

Andjelković Aleksandar 23 April 2015 (has links)
<p>Predmet istraživanja načelno se odnosi na razmatranje koncepta dvostrukih ventilisanih fasada (DVF) i njihov uticaj na energetsku efikasnost objekta. Ovaj koncept predstavlja jedan od primera adaptivnih fasada. Plan istraživanja zasnovan je na eksperimentalnom radu (na realnom objektu) i na numeričkim simulacijama modela objekta. Rezultati eksperimentalnog dela istraživanja pokazuju na koji način zavise termičke osobine objekta sa DVF od trenutnih meteorolo&scaron;kih uslova. Takođe, ovi rezultati poslužili su za fino pode&scaron;avanje modela i za postizanje &scaron;to vernije slike realnog objekta. Kriterijum prihvatljivosti, kada je model potvrđen, definisani su sa preporučenim statističkim indikatorima. Na taj način, formiran model u daljoj analizi je kori&scaron;ćen za definisanje sezonskih operativnih strategija. Rezultati simulacija za sve predložene operativne strategije, ocenjuju kakav je njihov uticaj na potro&scaron;nju energije za grejanje i klimatizaciju posmatranog objekta. Poređenjem sa modelima objekta sa tradicionalnom fasadom, pokazana je opravdanost primene koncepta DVF u klimatskim uslovima Beograda.</p> / <p>Research generally refers to the consideration of the concept of a double skin facades (DSF) and their impact on energy efficiency of the building. This concept is an example of adaptive facades. The research plan is based on experimental work and on the numerical model simulation. The results of experimental research works show how energy characteristics of the object with the DSF depend of current meteorological conditions. Also, these results were used to fine-tune the model to achieve as closely as possible the real presentation of the real building. The criterion of eligibility, when the model is verified, are defined with the recommended statistical indicators. Validated model in further analysis is used to define seasonal operational strategies. The simulation results for all proposed operational strategies, assess what is their impact on the building energy consumption for heating and air-conditioning. Compared to the models with a traditional facade, analysis show justification for the application of the concept of DSF in the climatic conditions of Belgrade.</p>

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