The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade
In recent years, the demand for energy-efficient technological solutions in the building sector has risen significantly worldwide. The exploitation of phase change material as a medium for thermal energy storage in building envelopes has increased due to its superior properties. There is still a kno...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sciendo
2022-01-01
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| Series: | Environmental and Climate Technologies |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/rtuect-2022-0096 |
| _version_ | 1811171377059725312 |
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| author | Narbuts Jānis Blumberga Andra Zundāns Zigmārs Freimanis Ritvars Bāliņš Roberts Vanaga Ruta |
| author_facet | Narbuts Jānis Blumberga Andra Zundāns Zigmārs Freimanis Ritvars Bāliņš Roberts Vanaga Ruta |
| author_sort | Narbuts Jānis |
| collection | DOAJ |
| description | In recent years, the demand for energy-efficient technological solutions in the building sector has risen significantly worldwide. The exploitation of phase change material as a medium for thermal energy storage in building envelopes has increased due to its superior properties. There is still a knowledge gap to cover in the way to the effective solar thermal energy storage in the building envelope – to enhance the heat transfer, to reduce the heat loss, etc. This paper deals with the optimisation of heat transfer using a solar concentrator (Fresnel lens). This study examines the effect of Fresnel lens focal point location on heat transfer in a dynamic solar facade prototype that stores thermal energy in phase change material. Nine different setups (solar façade compositions) were tested in the laboratory – two parameters with three alternatives each. Testing conditions simulate the relevant Northern Europe climate. By changing the air gap configuration and location of the Fresnel lens focal point, the heat transfer to phase change material was observed by measuring temperatures in the phase change material container using five thermocouples. The results show the improved thermal performance in test modules with larger cone diameter by 7.2 % and Fresnel lens focal point positioning closer to the back of the phase change material container by 5.4 %. |
| first_indexed | 2024-04-10T17:13:03Z |
| format | Article |
| id | doaj.art-8622b1f8960249aa8a80c0c286f917a7 |
| institution | Directory Open Access Journal |
| issn | 2255-8837 |
| language | English |
| last_indexed | 2024-04-10T17:13:03Z |
| publishDate | 2022-01-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Environmental and Climate Technologies |
| spelling | doaj.art-8622b1f8960249aa8a80c0c286f917a72023-02-05T19:46:42ZengSciendoEnvironmental and Climate Technologies2255-88372022-01-012611268127810.2478/rtuect-2022-0096The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar FacadeNarbuts Jānis0Blumberga Andra1Zundāns Zigmārs2Freimanis Ritvars3Bāliņš Roberts4Vanaga Ruta5Institute of Energy Systems and Environment, Riga Technical University, Riga, LatviaInstitute of Energy Systems and Environment, Riga Technical University, Riga, LatviaInstitute of Energy Systems and Environment, Riga Technical University, Riga, LatviaInstitute of Energy Systems and Environment, Riga Technical University, Riga, LatviaInstitute of Energy Systems and Environment, Riga Technical University, Riga, LatviaInstitute of Energy Systems and Environment, Riga Technical University, Riga, LatviaIn recent years, the demand for energy-efficient technological solutions in the building sector has risen significantly worldwide. The exploitation of phase change material as a medium for thermal energy storage in building envelopes has increased due to its superior properties. There is still a knowledge gap to cover in the way to the effective solar thermal energy storage in the building envelope – to enhance the heat transfer, to reduce the heat loss, etc. This paper deals with the optimisation of heat transfer using a solar concentrator (Fresnel lens). This study examines the effect of Fresnel lens focal point location on heat transfer in a dynamic solar facade prototype that stores thermal energy in phase change material. Nine different setups (solar façade compositions) were tested in the laboratory – two parameters with three alternatives each. Testing conditions simulate the relevant Northern Europe climate. By changing the air gap configuration and location of the Fresnel lens focal point, the heat transfer to phase change material was observed by measuring temperatures in the phase change material container using five thermocouples. The results show the improved thermal performance in test modules with larger cone diameter by 7.2 % and Fresnel lens focal point positioning closer to the back of the phase change material container by 5.4 %.https://doi.org/10.2478/rtuect-2022-0096building envelopemelting temperaturesolar thermal energy storagelatent heatsmall-scale dynamic solar module |
| spellingShingle | Narbuts Jānis Blumberga Andra Zundāns Zigmārs Freimanis Ritvars Bāliņš Roberts Vanaga Ruta The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade Environmental and Climate Technologies building envelope melting temperature solar thermal energy storage latent heat small-scale dynamic solar module |
| title | The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade |
| title_full | The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade |
| title_fullStr | The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade |
| title_full_unstemmed | The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade |
| title_short | The Effect of Fresnel Lens Focal Point Location on Heat Transfer in Phase Change Material (PCM) Enhanced Dynamic Solar Facade |
| title_sort | effect of fresnel lens focal point location on heat transfer in phase change material pcm enhanced dynamic solar facade |
| topic | building envelope melting temperature solar thermal energy storage latent heat small-scale dynamic solar module |
| url | https://doi.org/10.2478/rtuect-2022-0096 |
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