{"id":{"repo_id":"reykjavik","oai_identifier":"oai:skemman.is:1946/40101"},"canonical_url":"https://search.dev.ndltd.org/etd/reykjavik/oai:skemman.is:1946/40101","repository":{"repo_id":"reykjavik","name":"Reykjavík University","base_url":"https://skemman.is/oai/request"},"display":{"title":"CFD analysis of heat storage and recovery from geothermal water exiting the space heating radiator using phase change material","abstract":"Geothermal energy has been widely adopted as an environmentally friendly natural energy resource for electricity generation and direct use applications. Efficient way of utilizing geothermal energy, mainly low enthalpy geothermal fluid, involves cascaded utilization of the hot water for direct use applications. The most important direct usage application is that of space heating. A significant energy loss is however, bound to occur while using geothermal water for space heating due to fluid exiting the room radiators at a considerable high temperature, especially during peak heat load hours. Heat storage and recovery process using phase change materials can provide an effective way to overcome this energy wastage. The purpose of this study is to estimate the performance of phase change materials for heat storage and recovery from geothermal fluid exiting the space heating radiator. The present research focuses on Computational Fluid Dynamic (CFD) analysis of the heat storage and recovery process. The present work uses a CFD tool (Ansys Fluent) for simulating heat transfer from the hot water flow, phase change during melting and solidification process and heat recovery from the phase change material to the surrounding. Simulation results shows application of phase change material as an effective way of heat storage and recovery thus improving the thermal efficiency of space heating using geothermal energy.","abstract_html":"Geothermal energy has been widely adopted as an environmentally friendly natural energy resource for electricity generation and direct use applications. Efficient way of utilizing geothermal energy, mainly low enthalpy geothermal fluid, involves cascaded utilization of the hot water for direct use applications. The most important direct usage application is that of space heating. A significant energy loss is however, bound to occur while using geothermal water for space heating due to fluid exiting the room radiators at a considerable high temperature, especially during peak heat load hours. Heat storage and recovery process using phase change materials can provide an effective way to overcome this energy wastage. The purpose of this study is to estimate the performance of phase change materials for heat storage and recovery from geothermal fluid exiting the space heating radiator. The present research focuses on Computational Fluid Dynamic (CFD) analysis of the heat storage and recovery process. The present work uses a CFD tool (Ansys Fluent) for simulating heat transfer from the hot water flow, phase change during melting and solidification process and heat recovery from the phase change material to the surrounding. Simulation results shows application of phase change material as an effective way of heat storage and recovery thus improving the thermal efficiency of space heating using geothermal energy.","abstract_has_math":false,"creators":["Daiki Masumoto 1995-"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Háskólinn í Reykjavík"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021-11-03T13:07:17Z","date_published":"2021-11-03T13:07:17Z","updated_at":"2026-07-27T20:39:26Z","subjects":["Orkuverkfræði","Meistaraprófsritgerðir","Jarðhiti","Raforkuframleiðsla","Upphitun húsa","Sustainable energy engineering","Geothermal energy","Electric power","Heating"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1946/40101","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Háskólinn í Reykjavík"]},{"key":"dc:creator","label":"Author","values":["Daiki Masumoto 1995-"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2021-11-03T13:07:16Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2021-11-03T13:07:16Z"]},{"key":"dc:date.issued","label":"Date","values":["2021-11-03T13:07:17Z"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Orkuverkfræði","Meistaraprófsritgerðir","Jarðhiti","Raforkuframleiðsla","Upphitun húsa","Sustainable energy engineering","Geothermal energy","Electric power","Heating"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1946/40101"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Geothermal energy has been widely adopted as an environmentally friendly natural energy resource for electricity generation and direct use applications. Efficient way of utilizing geothermal energy, mainly low enthalpy geothermal fluid, involves cascaded utilization of the hot water for direct use applications. The most important direct usage application is that of space heating. A significant energy loss is however, bound to occur while using geothermal water for space heating due to fluid exiting the room radiators at a considerable high temperature, especially during peak heat load hours. Heat storage and recovery process using phase change materials can provide an effective way to overcome this energy wastage. The purpose of this study is to estimate the performance of phase change materials for heat storage and recovery from geothermal fluid exiting the space heating radiator. The present research focuses on Computational Fluid Dynamic (CFD) analysis of the heat storage and recovery process. The present work uses a CFD tool (Ansys Fluent) for simulating heat transfer from the hot water flow, phase change during melting and solidification process and heat recovery from the phase change material to the surrounding. Simulation results shows application of phase change material as an effective way of heat storage and recovery thus improving the thermal efficiency of space heating using geothermal energy.","Jarðhiti hefur verið notaður víða sem umhverfisvæn náttúruauðlind til raforkuframleiðslu og í beina nýtingu. Skilvirk leið til að nýta þessa orku, og þá sérstaklega orku úr lághitavökva er fjölnýting hennar. Ein mikilvægasti tilgangur beinnar nýtingu jarðhita er til húshitunar. Þónokkur varmatöp geta orðið í bakstreymisvatni þegar jarðhitavatn er nýtt til húshitunar, sérstaklega þegar húshitunarálag er mikið. Varmageymsla með fasabreytingarefnum getur verið skilvirk leið til að lágmarka þessi orkutöp. Tilgangur þessarar rannsóknar er að meta getu fasabreytingarefna til varmageymslu og varmagjafar yfir í jarðhitavatn í húshitun. Töluleg varma- og straumfræði (CFD) er nýtt til greiningar á þessum ferlum. Ansys Fluent er notað til líkanagerðar þar sem varmaflutningur úr heitu vatni, fasabreyting í bræðslu og storknun og varmagjöf úr fasabreytingarefninu til umhverfisins eru reiknuð. Niðurstöður líkanagerðarinnar sýna að fasabreytingarefni geta verið skilvirk leið til að geyma varmaorku og geta því aukið nýtni jarðhitanýtingar til húshitunar."]},{"key":"dc:title","label":"Title","values":["CFD analysis of heat storage and recovery from geothermal water exiting the space heating radiator using phase change material"]}]}],"canonical_facts":{"dc:contributor":["Háskólinn í Reykjavík"],"dc:creator":["Daiki Masumoto 1995-"],"dc:date.accessioned":["2021-11-03T13:07:16Z"],"dc:date.available":["2021-11-03T13:07:16Z"],"dc:date.issued":["2021-11-03T13:07:17Z"],"dc:description.abstract":["Geothermal energy has been widely adopted as an environmentally friendly natural energy resource for electricity generation and direct use applications. Efficient way of utilizing geothermal energy, mainly low enthalpy geothermal fluid, involves cascaded utilization of the hot water for direct use applications. The most important direct usage application is that of space heating. A significant energy loss is however, bound to occur while using geothermal water for space heating due to fluid exiting the room radiators at a considerable high temperature, especially during peak heat load hours. Heat storage and recovery process using phase change materials can provide an effective way to overcome this energy wastage. The purpose of this study is to estimate the performance of phase change materials for heat storage and recovery from geothermal fluid exiting the space heating radiator. The present research focuses on Computational Fluid Dynamic (CFD) analysis of the heat storage and recovery process. The present work uses a CFD tool (Ansys Fluent) for simulating heat transfer from the hot water flow, phase change during melting and solidification process and heat recovery from the phase change material to the surrounding. Simulation results shows application of phase change material as an effective way of heat storage and recovery thus improving the thermal efficiency of space heating using geothermal energy.","Jarðhiti hefur verið notaður víða sem umhverfisvæn náttúruauðlind til raforkuframleiðslu og í beina nýtingu. Skilvirk leið til að nýta þessa orku, og þá sérstaklega orku úr lághitavökva er fjölnýting hennar. Ein mikilvægasti tilgangur beinnar nýtingu jarðhita er til húshitunar. Þónokkur varmatöp geta orðið í bakstreymisvatni þegar jarðhitavatn er nýtt til húshitunar, sérstaklega þegar húshitunarálag er mikið. Varmageymsla með fasabreytingarefnum getur verið skilvirk leið til að lágmarka þessi orkutöp. Tilgangur þessarar rannsóknar er að meta getu fasabreytingarefna til varmageymslu og varmagjafar yfir í jarðhitavatn í húshitun. Töluleg varma- og straumfræði (CFD) er nýtt til greiningar á þessum ferlum. Ansys Fluent er notað til líkanagerðar þar sem varmaflutningur úr heitu vatni, fasabreyting í bræðslu og storknun og varmagjöf úr fasabreytingarefninu til umhverfisins eru reiknuð. Niðurstöður líkanagerðarinnar sýna að fasabreytingarefni geta verið skilvirk leið til að geyma varmaorku og geta því aukið nýtni jarðhitanýtingar til húshitunar."],"dc:identifier.uri":["http://hdl.handle.net/1946/40101"],"dc:language.iso":["en"],"dc:subject":["Orkuverkfræði","Meistaraprófsritgerðir","Jarðhiti","Raforkuframleiðsla","Upphitun húsa","Sustainable energy engineering","Geothermal energy","Electric power","Heating"],"dc:title":["CFD analysis of heat storage and recovery from geothermal water exiting the space heating radiator using phase change material"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:39:26Z"}