20.500.12556/RUL-161652 Visokotemperaturni visokotlačni hranilnik toplote high-Temperature high-pressure heat storage unit Hranilniki toplote so trenutno najbolj pogosto uporabljeni pri centralnem ogrevanju stavb, kjer pa so temperature delovanja razmeroma nizke (80 °C). S povišanjem temperature delovanja hranilnika toplote lahko v hranilnik shranimo bistveno več toplote, s tem pa zmanjšamo volumen hranilnika. Lahko ga uporabimo v industrijske namene, kjer toploto shranjujemo pri visokih temperaturah, višjih od 100 °C. Da ohranimo vodo v kapljeviti fazi pri povišanih temperaturah, moramo vzdrževati ustrezno visok tlak v hranilniku. V tem delu smo pregledali trenutno stanje tehnike shranjevanja toplote pri visokih temperaturah. Na podlagi obstoječe zakonodaje in ustreznega standarda smo zasnovali tlačno posodo hranilnika toplote. Oblikovali smo dva koncepta polnjenja oz. segrevanja hranilnika: segrevanje pri konstantnem tlaku in segrevanje pri konstantnem volumnu ter ju primerjali med seboj na podlagi količine shranjene energije in kompleksnosti zasnove. Najprej smo naredili poenostavljeno obliko izolacije, s pomočjo katere smo analizirali vpliv različnih debelin izolacije na čas polnjenja in čas ohlajanja hranilnika. Na podlagi izbrane debeline izolacije smo naredili toplotno simulacijo. Rezultate, pridobljene na podlagi poenostavljene oblike, smo primerjali z rezultati iz toplotne simulacije. Na koncu smo naredili še stroškovno analizo izdelave hranilnika ter analizo smiselnosti gradnje in uporabe takšne oblike hranilnika toplote. Heat storages are currently the most commonly used in heating of buildings, where the operating temperatures are relatively low (80 °C). By increasing the operating temperature of the heat storage, significantly more heat can be stored in the heat storage, thus reducing the volume of the heat storage. It can be used for industrial applications where heat is stored at higher temperatures than 100 °C. To maintain water in the liquid phase at elevated temperatures, the pressure in the storage tank must be maintained at an appropriately high pressure. In this work, we reviewed the current state of the art in high temperature heat storage. Based on the existing legislation and the relevant standard, we have designed a pressure vessel for the heat store. Two concepts for filling or heating the storage tank have been developed: heating at constant pressure and heating at constant volume and compared with each other on the basis of the amount of energy stored and the complexity of the design. First, a simplified insulation design was made to analyse the effect of different insulation thicknesses on the filling and cooling time of the storage tank. Based on the chosen insulation thickness, a thermal simulation was performed. The results obtained from the simplified design were compared with the results from the thermal simulation. Finally, a cost analysis of the construction of the feeder and an analysis of the feasibility of constructing and using this design of heat store were carried out. toplota hranilnik toplote visoka temperatura visok tlak voda heat heat storage high temperature high pressure water true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-09-13 07:31:23 2024-09-13 07:31:29 2024-12-19 10:49:41 0000-00-00 00:00:00 2024 0 0 XXII, 60 str. 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536:628.8:62-98.022.17(043.2) 265723 219856387 37034.pdf 37034.pdf 1 9F9D51169570D80DB2CCE6670DF46530 da4a1a5ec9b2418d0b432d3ccdfc7f273779a04674a77cc7b457883e17c75a70 5d22b606-7191-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=190621 Fakulteta za strojništvo 0 0 0