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Title:Odzivne funkcije in toplotni vpliv različnih konfiguracij vertikalnih toplotnih prenosnikov v vrtini v sistemih zemeljskih toplotnih črpalk
Authors:Pešl, Metka (Author)
Goričanec, Darko (Mentor) More about this mentor... New window
Krope, Jurij (Co-mentor)
Files:.pdf MAG_Pesl_Metka_2016.pdf (1,85 MB)
MD5: B27268E93D9B80F661ADA50A79490E51
 
Language:Slovenian
Work type:Master's thesis (m2)
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V magistrskem delu je temeljni poudarek na treh različnih konfiguracijah vrtin za katere so prikazane grafične primerjave g-funkcij, ki so izračunane z analitičnim modelom končnega črtnega vira in določene z numeričnim modelom Eskilsona. Rezultati kažejo, da analitična rešitev sledi zelo dobro numeričnim rezultatom. Predstavljena je tudi študija, kako se temperatura zemlje s časom spreminja v primeru različnih konfiguracij vrtin, če toploto odvajamo iz zemlje (ogrevanje) in če toploto dovajamo v zemljo (hlajenje). Rezultati kažejo, da je sprememba temperaturnega polja odvisna od razdalje med vrtinami. Toplotni vpliv med vrtinami je skoraj neopazen v začetku delovanja sistema s toplotno črpalko, vendar pa s časom postaja vse večji, dokler se ne doseže stacionarno stanje. Toplotni vpliv med vrtinami pada z naraščajočo razdaljo med njimi in je zanemarljiv, če je razdalja med vrtinami večja od dolžine vrtine. Na koncu magistrskega dela je za primer enodružinske hiše izvedeno dimenzioniranje toplotne črpalke, ki omogoča ogrevanje, hlajene in pripravo tople sanitarne vode. Vir toplote je zemlja z vertikalnima toplotnima prenosnikoma v vrtini. Vračilna doba naložbe je 13,7 leta.
Keywords:geotermalna energija, toplotna črpalka zemlja/voda, vertikalni toplotni prenosnik v vrtini, temperaturno polje, brezdimenzijske temperaturne odzivne g-funkcije
Year of publishing:2016
Publisher:[M. Pešl]
Source:Maribor
UDC:621.577.2+697.1(043)
COBISS_ID:19685654 New window
NUK URN:URN:SI:UM:DK:R0P62D5O
Views:809
Downloads:77
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:Response functions and thermal influence for various multiple borehole configurations in ground coupled heat pump systems
Abstract:In master thesis the primary focus is on three various multiple borehole configurations for which a graphical comparison of g-functions, calculated after an analytical model of final line source and obtained with numerical model derived from the work of Eskilson, are shown. The results show that the analytical solution follows the numerical results very well. A case study is also presented to show how the ground temperature changes with time for various multiple borehole configurations for heat extraction (heating) and heat injection (cooling). The results show that the change of temperature field is dependent on spacing between boreholes. Thermal influence between boreholes is almost imperceptible in the start of operation, but it becomes higher with time until the stationary state is not achieved. Thermal influence between boreholes decreases with increasing the spacing between boreholes and become negligible, if the spacing is larger than length of borehole. In the end of master thesis dimensioning of heat pump for heating, cooling and preparation of domestic hot water for single-family detached house is presented. The heat source is ground with vertical heat exchangers in borehole. Investment return period is 13,7 years.
Keywords:geothermal energy, ground-water heat pump, vertical borehole heat exchanger, temperature field, non-dimensional temperature response g-function


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