| dc.contributor.author | Kropas, Tomas | |
| dc.contributor.author | Streckienė, Giedrė | |
| dc.date.accessioned | 2023-09-18T20:30:18Z | |
| dc.date.available | 2023-09-18T20:30:18Z | |
| dc.date.issued | 2020 | |
| dc.identifier.uri | https://etalpykla.vilniustech.lt/handle/123456789/150510 | |
| dc.description.abstract | Active solar water heating systems typically include hot water storage tanks. The selection of the storage system strongly affects the performance of the entire system. This article presents a detailed analysis of a hot water storage tank during charging and dynamic charging-discharging mode. A numerical model using computational fluid dynamics for the storage tank was developed to investigate the temperature distribution inside of it. Transient thermal analysis was carried using ANSYS Fluent. The numerical model was validated with the experimental results. The energy and exergy analysis as an important tool for the evaluation of the thermal systems quantitatively and qualitatively was performed. The calculation procedures were described. The energy and exergy efficiencies, heat losses were calculated for steady and dynamic processes. Effect of mass flow rate was analysed. The results from parametric analysis showed that charging dynamics reduced the thermocline and efficiency of the hot water storage tank. The dependency of the exergy efficiency of the heat storage tank on the reference environment temperature during the dynamic operation was analysed. Exergy efficiencies for two cities with different climates were compared. This indicated that the higher environmental temperature gave lower exergy efficiency of the storage tank. | eng |
| dc.format | PDF | |
| dc.format.extent | p. 1-8 | |
| dc.format.medium | tekstas / txt | |
| dc.language.iso | eng | |
| dc.relation.isreferencedby | Conference Proceedings Citation Index - Science (Web of Science) | |
| dc.source.uri | https://doi.org/10.3846/enviro.2020.793 | |
| dc.source.uri | http://enviro.vgtu.lt | |
| dc.title | Energy and exergy analysis of a cylindrical hot water storage tank: experimental and CFD analysis | |
| dc.type | Straipsnis konferencijos darbų leidinyje Web of Science DB / Paper in conference publication in Web of Science DB | |
| dcterms.accessRights | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
| dcterms.license | Creative Commons – Attribution – 4.0 International | |
| dcterms.references | 20 | |
| dc.type.pubtype | P1a - Straipsnis konferencijos darbų leidinyje Web of Science DB / Article in conference proceedings Web of Science DB | |
| dc.contributor.institution | Vilniaus Gedimino technikos universitetas | |
| dc.contributor.faculty | Aplinkos inžinerijos fakultetas / Faculty of Environmental Engineering | |
| dc.subject.researchfield | T 006 - Energetika ir termoinžinerija / Energy and thermoengineering | |
| dc.subject.researchfield | T 009 - Mechanikos inžinerija / Mechanical enginering | |
| dc.subject.vgtuprioritizedfields | AE0303 - Pastatų energetika / Building energetics | |
| dc.subject.ltspecializations | L102 - Energetika ir tvari aplinka / Energy and a sustainable environment | |
| dc.subject.en | heat storage tank | |
| dc.subject.en | energy efficiency | |
| dc.subject.en | exergy efficiency | |
| dc.subject.en | computational fluid dynamics (CFD) | |
| dc.subject.en | fluid flow | |
| dc.subject.en | environmental temperature | |
| dc.subject.en | climate | |
| dcterms.sourcetitle | 11th International conference "Environmental Engineering", 21-22 May 2020, Vilnius Gediminas Technical University, Lithuania | |
| dc.publisher.name | VGTU Press | |
| dc.publisher.city | Vilnius | |
| dc.identifier.doi | 000639614200044 | |
| dc.identifier.doi | 10.3846/enviro.2020.793 | |
| dc.identifier.elaba | 66355416 | |
