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Estimation of residual lifetime of steam pipelines on the basis of the steam temperatureVojvodič-Tuma, Jelena ; Dejanovič, BorisV mnogih vejah industrije imamo opravka s stroji in napravami, ki obratujejo z mokro paro pri različnih tlakih in temperaturah. Sem spadajo tudi prenosniki toplote in cevovodi v velikih in v ... industrijskih termoelektrarnah. Erozija zaradi mokre pare je posebno pomembna v jedrskih elektrarnah s tlačnovodnim ali z vrelnim reaktorjem, saj imamo tam že na začetku - v nasprotju s klasičnimi elektrarnami - opravka s suho in ne s pregreto vodno paro. Pregledovanje prenosnikov toplote se v termoelektrarnah močno razlikuje od medobratovalnih pregledov posameznih tlačnih posod v drugih vejah industrije. Vzrok je v tem, da so ti prenosniki toplote povezani s cevovodi v sistem in jih mnogokrat ni mogoče osamiti. Zaradi tega je tlačni test pri povišanem tlaku (1,5 projektni tlak) nemogoče enostavno izvesti, ker je za tak preizkus potrebno veliko pripravljalnih in dodatnih del. V prispevku je prikazana metoda pregledovanja tlačnih posod. Metoda omogoča zagotavljanje integritete tlačnih posod z odkrivanjem morebitnih razpok, nastalih v času obratovanja. Kot primer bodo prikazani rezultati pregleda regenerativnega prenosa toplote, ki obratuje s 15 % mokro paro in pri katerem smo izmerili stanjšanje debeline plašča zaradi erozijskega delovanja mokre pare. Določili bomo tudi preostalo življenjsko dobo kolena cevovoda, ki je bilo prav tako poškodovano zaradi erozije.Type of material - conference contributionPublish date - 1997Language - englishCOBISS.SI-ID - 18968325
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vojvodič-Tuma, Jelena | 09788 |
Dejanovič, Boris | 15484 |
Source: Personal bibliographies
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