4954 KB332 KB0 KB2009Goričanec, DarkoKrope, JurijUrbancl, DanijelaXVIII, 122 str., 30 cmCOBISSID_HOST:13166614URN:URN:NBN:SI:doc-5CSF5B2RslD. Doberšekvisokošolska delaenergeticenergetikagrelci pralnih strojevheat transferhot water networknelinearno programiranjenonlinear programmingoptimisationoptimizacijapralni strojiprenos toploterational use of energysmotrna raba energijevodni kamenvročevodna omrežjawashing machine heaterswashing machineswater scaleOptimizacija vročevodnega omrežja in vpliv vodnega kamna na prenos toplote grelnih površin| doctoral dissertation| doktorska disertacija| Hot water network optimisation and water scale influenece on heat transfer of heating surfaces|The doctoral dissertation consists of three substantive wholes, where solutions that can contribute to rational use of energy and the reduction of harmful effects on the environment are presented, aiming at goals, which are the priority of world energy and environmental policies. Additionally, the statistical data of greenhouse gas emissions and suggested measures for their reduction are presented. Furthermore, flow - pressure conditions of district heating systems are researched. Also, with the variation of influential parameters in optimization model the impact on the course of optimal tree ways in loopy networks are analyzed. The water scale morphology is presented in more detail. Its most common component is calcium carbonate in aragonite or calcite shape. Some experiments were conducted for the evaluation of water scale precipitation on heaters of boilers for hot water and on washing machine heaters. The effect of divalent ions on crystal structure of water scale is analysed and the evaluation of heat transfer reduction because of scale deposits on heaters from different materials is given. A suggestion for an optimal installation of heaters and the shape of vat is made for assuring well water turbulence and less scale depositsDoktorska disertacija zajema tri sklope v katerih so predstavljene rešitve, ki lahko v znatni meri prispevajo k smotrni rabi energije, zmanjšanju škodljivih vplivov na okolje in posledično k ciljem, ki so prioriteta svetovne energetske in okoljske politike. Predstavljeni so statistični podatki o emisijah toplogrednih plinov in predlagani ukrepi za njihovo zmanjšanje. Raziskane so pretočno - tlačne zakonitosti sistema daljinskega ogrevanja ter z variacijo vplivnih parametrov v optimizacijskem modelu analiziran vpliv na potek optimalnih drevesnih poti v zankastem omrežju. Podrobneje je predstavljena morfologija vodnega kamna, katerega glavna sestavina je kalcijev karbonat v kalcitni ali aragonitni strukturi. V sklopu eksperimentalnega dela so izvedeni preizkusi izločanja vodnega kamna na grelcih bojlerjev za toplo vodo in na grelcih pralnih strojev. Analiziran je vpliv dvovalentnih ionov na kristalno obliko vodnega kamna in podana ocena zmanjšanega prenosa toplote zaradi oblog na grelcih iz različnih materialov. Predlagana je optimalna namestitev grelcev in oblika kadi, ki zagotavlja dobro turbulenco toka vode in manjšo tvorbo vodnega kamnaTEXTvisokošolska delatheses and dissertationsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Mariboru, Fakulteta za kemijo in kemijsko tehnologijo