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Title:DOLOČANJE UČINKOVITOSTI TOPLOTNIH PRENOSNIKOV S POMOČJO EKSERGIJSKIH TOKOV
Authors:ID Bevc, Leon (Author)
ID Avsec, Jurij (Mentor) More about this mentor... New window
ID Predin, Andrej (Comentor)
Files:.pdf UNI_Bevc_Leon_2012.pdf (2,80 MB)
MD5: D1C8FDA17BDAF5A136AFE9226328036D
PID: 20.500.12556/dkum/a7c7f5c2-5eda-4f2e-b411-99aadca337f8
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FE - Faculty of Energy Technology
Abstract:V programskem jeziku Python sem izdelal model toplotnega prenosnika s plaščem in ravnim snopom cevi. V izračunih je uporabljena metoda e-NTU. Snovne lastnosti medija in brezdimenzijska števila so z interpolacijskimi metodami izračunana v vsaki iteraciji posebej. Z modelom sem preučil dinamični in statični odziv za sisteme voda-voda ter voda-para. Eksergijski in energijski izkoristek prenosnika narašča s številom prelivnih polj, nanj pa vpliva še razmerje kapacitet obeh medijev. Oba izkoristka kot funkciji razmerja kapacitet medsebojno nista sorazmerna.
Keywords:prenosnik toplote, ε-NTU, Python, model, eksergija, entropija, energija
Place of publishing:Krško
Publisher:[L. Bevc]
Year of publishing:2012
PID:20.500.12556/DKUM-37762 New window
UDC:621.565.9:536.7(043.2)
COBISS.SI-ID:1024108124 New window
NUK URN:URN:SI:UM:DK:XRVHFSNV
Publication date in DKUM:24.11.2012
Views:2244
Downloads:348
Metadata:XML DC-XML DC-RDF
Categories:FE
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Secondary language

Language:English
Title:THE DETERMINATION OF ENERGY EFFICIENCY OF HEAT EXCHANGERS ON THE BASIS OF EXERGY FLOWS
Abstract:With program language Python a computer model of a tube&shell heat exchanger was created. Calculations are based on e-NTU method. Physical properties of medium and dimensionless numbers are calculated by means of interpolation at each iteration. Model calculates dynamic and static performance of heat exchanger for water-water and water-steam systems. Exergy and energy efficeny of heat exchanger improves with increased number of bafflers and is also influenced by capacity ratio of both media. Both efficencies as functions of capacity ratio are not propotional.
Keywords:heat exchanger, ε-NTU, Python, model, exergy, entropy, energy


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