#fresnellens — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #fresnellens, aggregated by home.social.
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Taken this day, 2011, reflections and refractions: https://www.flickr.com/photos/woolamaloo_gazette/5577392570
A model of how the incredible Fresnel lens in a lighthouse works, Museum of Scotland.
If you look at the larger version on Flickr, you can see partial reflections of me taking the pic, and my dad walking past
#Edinburgh #Edimbourg #photography #photographie #NationalMuseumOfScotland #FresnelLens #engineering #science
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Taken this day, 2011, reflections and refractions: https://www.flickr.com/photos/woolamaloo_gazette/5577392570
A model of how the incredible Fresnel lens in a lighthouse works, Museum of Scotland.
If you look at the larger version on Flickr, you can see partial reflections of me taking the pic, and my dad walking past
#Edinburgh #Edimbourg #photography #photographie #NationalMuseumOfScotland #FresnelLens #engineering #science
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Taken this day, 2011, reflections and refractions: https://www.flickr.com/photos/woolamaloo_gazette/5577392570
A model of how the incredible Fresnel lens in a lighthouse works, Museum of Scotland.
If you look at the larger version on Flickr, you can see partial reflections of me taking the pic, and my dad walking past
#Edinburgh #Edimbourg #photography #photographie #NationalMuseumOfScotland #FresnelLens #engineering #science
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Taken this day, 2011, reflections and refractions: https://www.flickr.com/photos/woolamaloo_gazette/5577392570
A model of how the incredible Fresnel lens in a lighthouse works, Museum of Scotland.
If you look at the larger version on Flickr, you can see partial reflections of me taking the pic, and my dad walking past
#Edinburgh #Edimbourg #photography #photographie #NationalMuseumOfScotland #FresnelLens #engineering #science
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Taken this day, 2011, reflections and refractions: https://www.flickr.com/photos/woolamaloo_gazette/5577392570
A model of how the incredible Fresnel lens in a lighthouse works, Museum of Scotland.
If you look at the larger version on Flickr, you can see partial reflections of me taking the pic, and my dad walking past
#Edinburgh #Edimbourg #photography #photographie #NationalMuseumOfScotland #FresnelLens #engineering #science
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Christmas at the Lighthouse is Saturday | Entertainment https://www.byteseu.com/1573187/ #ArchitecturalElements #BuildingsAndStructures #CoastalConstruction #components #construction #ElectromagneticRadiation #Entertainment #FresnelLens #InteriorDesign #lenses #light #lighthouse #lighthouses #lighting #MarineArchitecture #MaritimeSignalling #NavigationalMarkers #OpticalCommunications #OpticalComponents #Optics #TawasPointLight #Towers #WaterTransportBuildingsAndStructures #WaterTransportInfrastructure
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An LED Projector as a Lighting Effect https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #LEDProjector #Fresnellens #LEDHacks
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An LED Projector as a Lighting Effect https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #LEDProjector #Fresnellens #LEDHacks
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An LED Projector as a Lighting Effect https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #LEDProjector #Fresnellens #LEDHacks
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An LED Projector as a Lighting Effect https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #LEDProjector #Fresnellens #LEDHacks
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An LED Projector as a Lighting Effect - If you had an array of high power addressable LEDs, how would you project them ont... - https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #ledprojector #fresnellens #ledhacks
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An LED Projector as a Lighting Effect - If you had an array of high power addressable LEDs, how would you project them ont... - https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #ledprojector #fresnellens #ledhacks
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An LED Projector as a Lighting Effect - If you had an array of high power addressable LEDs, how would you project them ont... - https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #ledprojector #fresnellens #ledhacks
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An LED Projector as a Lighting Effect - If you had an array of high power addressable LEDs, how would you project them ont... - https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #ledprojector #fresnellens #ledhacks
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An LED Projector as a Lighting Effect - If you had an array of high power addressable LEDs, how would you project them ont... - https://hackaday.com/2025/11/07/an-led-projector-as-a-lighting-effect/ #3dprintedlens #ledprojector #fresnellens #ledhacks
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#FresnelLens -- not just for #Lighthouses!
#Solar #Desalination Using Fresnel Lens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho,. Rubina Bahar, 21 October 2020"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of #Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
Conclusions
"This study was conducted as an initial investigation to observe the applicability of the #FlatFresnel lens as a cheap CSP device, which is conducted through experiments on different geometry solar stills varying the number of lenses. The study revealed that incorporating the Fresnel lens in tropical weather can enhance the overall production of distillate from a #SolarStill, although the location does not receive strong DNI. This study has opened up the possibility of further exploration in this field through more vigorous experiments. The findings can be summarized as:
1. Fresnel lens increases the total production from a solar still. The addition of Fresnel lenses increased the average and total production rate for different geometry solar stills.
2. Using multiple Fresnel lenses instead of a single one provides multiple hotspots and causes more evaporation of feedwater, thus leading to higher total production per total solar irradiation by 39%.
3. The increased length/width ratio caused significant improvement in production for all models, with the highest performance improvement of 41.8% for the Fresnel lens associated model."
Read more:
https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.565542/full#SolarPunkSunday #SolarPower #Desalinization #SolarStills #SolarDesalinization #Desalinisation
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#FresnelLens -- not just for #Lighthouses!
#Solar #Desalination Using Fresnel Lens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho,. Rubina Bahar, 21 October 2020"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of #Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
Conclusions
"This study was conducted as an initial investigation to observe the applicability of the #FlatFresnel lens as a cheap CSP device, which is conducted through experiments on different geometry solar stills varying the number of lenses. The study revealed that incorporating the Fresnel lens in tropical weather can enhance the overall production of distillate from a #SolarStill, although the location does not receive strong DNI. This study has opened up the possibility of further exploration in this field through more vigorous experiments. The findings can be summarized as:
1. Fresnel lens increases the total production from a solar still. The addition of Fresnel lenses increased the average and total production rate for different geometry solar stills.
2. Using multiple Fresnel lenses instead of a single one provides multiple hotspots and causes more evaporation of feedwater, thus leading to higher total production per total solar irradiation by 39%.
3. The increased length/width ratio caused significant improvement in production for all models, with the highest performance improvement of 41.8% for the Fresnel lens associated model."
Read more:
https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.565542/full#SolarPunkSunday #SolarPower #Desalinization #SolarStills #SolarDesalinization #Desalinisation
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#FresnelLens -- not just for #Lighthouses!
#Solar #Desalination Using Fresnel Lens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho,. Rubina Bahar, 21 October 2020"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of #Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
Conclusions
"This study was conducted as an initial investigation to observe the applicability of the #FlatFresnel lens as a cheap CSP device, which is conducted through experiments on different geometry solar stills varying the number of lenses. The study revealed that incorporating the Fresnel lens in tropical weather can enhance the overall production of distillate from a #SolarStill, although the location does not receive strong DNI. This study has opened up the possibility of further exploration in this field through more vigorous experiments. The findings can be summarized as:
1. Fresnel lens increases the total production from a solar still. The addition of Fresnel lenses increased the average and total production rate for different geometry solar stills.
2. Using multiple Fresnel lenses instead of a single one provides multiple hotspots and causes more evaporation of feedwater, thus leading to higher total production per total solar irradiation by 39%.
3. The increased length/width ratio caused significant improvement in production for all models, with the highest performance improvement of 41.8% for the Fresnel lens associated model."
Read more:
https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.565542/full#SolarPunkSunday #SolarPower #Desalinization #SolarStills #SolarDesalinization #Desalinisation
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#FresnelLens -- not just for #Lighthouses!
#Solar #Desalination Using Fresnel Lens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho,. Rubina Bahar, 21 October 2020"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of #Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
Conclusions
"This study was conducted as an initial investigation to observe the applicability of the #FlatFresnel lens as a cheap CSP device, which is conducted through experiments on different geometry solar stills varying the number of lenses. The study revealed that incorporating the Fresnel lens in tropical weather can enhance the overall production of distillate from a #SolarStill, although the location does not receive strong DNI. This study has opened up the possibility of further exploration in this field through more vigorous experiments. The findings can be summarized as:
1. Fresnel lens increases the total production from a solar still. The addition of Fresnel lenses increased the average and total production rate for different geometry solar stills.
2. Using multiple Fresnel lenses instead of a single one provides multiple hotspots and causes more evaporation of feedwater, thus leading to higher total production per total solar irradiation by 39%.
3. The increased length/width ratio caused significant improvement in production for all models, with the highest performance improvement of 41.8% for the Fresnel lens associated model."
Read more:
https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.565542/full#SolarPunkSunday #SolarPower #Desalinization #SolarStills #SolarDesalinization #Desalinisation
-
#FresnelLens -- not just for #Lighthouses!
#Solar #Desalination Using Fresnel Lens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho,. Rubina Bahar, 21 October 2020"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of #Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
Conclusions
"This study was conducted as an initial investigation to observe the applicability of the #FlatFresnel lens as a cheap CSP device, which is conducted through experiments on different geometry solar stills varying the number of lenses. The study revealed that incorporating the Fresnel lens in tropical weather can enhance the overall production of distillate from a #SolarStill, although the location does not receive strong DNI. This study has opened up the possibility of further exploration in this field through more vigorous experiments. The findings can be summarized as:
1. Fresnel lens increases the total production from a solar still. The addition of Fresnel lenses increased the average and total production rate for different geometry solar stills.
2. Using multiple Fresnel lenses instead of a single one provides multiple hotspots and causes more evaporation of feedwater, thus leading to higher total production per total solar irradiation by 39%.
3. The increased length/width ratio caused significant improvement in production for all models, with the highest performance improvement of 41.8% for the Fresnel lens associated model."
Read more:
https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2020.565542/full#SolarPunkSunday #SolarPower #Desalinization #SolarStills #SolarDesalinization #Desalinisation
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@kimon Excellent! I'm glad to see that #perovskite is being used! #FresnelLens #SolarConcentrator technology is another #SolarPower tech I think is promising!
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@kimon Excellent! I'm glad to see that #perovskite is being used! #FresnelLens #SolarConcentrator technology is another #SolarPower tech I think is promising!
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@kimon Excellent! I'm glad to see that #perovskite is being used! #FresnelLens #SolarConcentrator technology is another #SolarPower tech I think is promising!
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@kimon Excellent! I'm glad to see that #perovskite is being used! #FresnelLens #SolarConcentrator technology is another #SolarPower tech I think is promising!
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@kimon Excellent! I'm glad to see that #perovskite is being used! #FresnelLens #SolarConcentrator technology is another #SolarPower tech I think is promising!
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Fresnel Lenses were used in #Lighthouses since the 1820's until the mid 20th century. They were known as "the invention that saved a million ships".
[Image: Stock image of the fresnel lens at the Pensacola lighthouse]
A new designed linear #FresnelLens #SolarConcentrator based on spectral splitting for passive cooling of solar cells
by Soroush Kiyaee, Yadollah Saboohi, and Alireza Z. Moshfegh
15 February 2021Highlights
• A new design of a Fresnel lens based on spectral splitting.
• Passive cooling of a solar cell through diffracting the undesired spectrum portion.
• Optical-thermal simulation of the concentrator system.
• A temperature-dependent model by considering conduction, convection, and radiation.
• Comparison of different lenses in temperature and electrical efficiency of the cell.https://www.sciencedirect.com/science/article/abs/pii/S0196890420313054
#FresnelLens #SolarEnergy #SolarSundays #SolarSunday #Renewables #RenewablesNow #SolarPunkSunday
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Fresnel Lenses were used in #Lighthouses since the 1820's until the mid 20th century. They were known as "the invention that saved a million ships".
[Image: Stock image of the fresnel lens at the Pensacola lighthouse]
A new designed linear #FresnelLens #SolarConcentrator based on spectral splitting for passive cooling of solar cells
by Soroush Kiyaee, Yadollah Saboohi, and Alireza Z. Moshfegh
15 February 2021Highlights
• A new design of a Fresnel lens based on spectral splitting.
• Passive cooling of a solar cell through diffracting the undesired spectrum portion.
• Optical-thermal simulation of the concentrator system.
• A temperature-dependent model by considering conduction, convection, and radiation.
• Comparison of different lenses in temperature and electrical efficiency of the cell.https://www.sciencedirect.com/science/article/abs/pii/S0196890420313054
#FresnelLens #SolarEnergy #SolarSundays #SolarSunday #Renewables #RenewablesNow #SolarPunkSunday
-
Fresnel Lenses were used in #Lighthouses since the 1820's until the mid 20th century. They were known as "the invention that saved a million ships".
[Image: Stock image of the fresnel lens at the Pensacola lighthouse]
A new designed linear #FresnelLens #SolarConcentrator based on spectral splitting for passive cooling of solar cells
by Soroush Kiyaee, Yadollah Saboohi, and Alireza Z. Moshfegh
15 February 2021Highlights
• A new design of a Fresnel lens based on spectral splitting.
• Passive cooling of a solar cell through diffracting the undesired spectrum portion.
• Optical-thermal simulation of the concentrator system.
• A temperature-dependent model by considering conduction, convection, and radiation.
• Comparison of different lenses in temperature and electrical efficiency of the cell.https://www.sciencedirect.com/science/article/abs/pii/S0196890420313054
#FresnelLens #SolarEnergy #SolarSundays #SolarSunday #Renewables #RenewablesNow #SolarPunkSunday
-
Fresnel Lenses were used in #Lighthouses since the 1820's until the mid 20th century. They were known as "the invention that saved a million ships".
[Image: Stock image of the fresnel lens at the Pensacola lighthouse]
A new designed linear #FresnelLens #SolarConcentrator based on spectral splitting for passive cooling of solar cells
by Soroush Kiyaee, Yadollah Saboohi, and Alireza Z. Moshfegh
15 February 2021Highlights
• A new design of a Fresnel lens based on spectral splitting.
• Passive cooling of a solar cell through diffracting the undesired spectrum portion.
• Optical-thermal simulation of the concentrator system.
• A temperature-dependent model by considering conduction, convection, and radiation.
• Comparison of different lenses in temperature and electrical efficiency of the cell.https://www.sciencedirect.com/science/article/abs/pii/S0196890420313054
#FresnelLens #SolarEnergy #SolarSundays #SolarSunday #Renewables #RenewablesNow #SolarPunkSunday
-
Fresnel Lenses were used in #Lighthouses since the 1820's until the mid 20th century. They were known as "the invention that saved a million ships".
[Image: Stock image of the fresnel lens at the Pensacola lighthouse]
A new designed linear #FresnelLens #SolarConcentrator based on spectral splitting for passive cooling of solar cells
by Soroush Kiyaee, Yadollah Saboohi, and Alireza Z. Moshfegh
15 February 2021Highlights
• A new design of a Fresnel lens based on spectral splitting.
• Passive cooling of a solar cell through diffracting the undesired spectrum portion.
• Optical-thermal simulation of the concentrator system.
• A temperature-dependent model by considering conduction, convection, and radiation.
• Comparison of different lenses in temperature and electrical efficiency of the cell.https://www.sciencedirect.com/science/article/abs/pii/S0196890420313054
#FresnelLens #SolarEnergy #SolarSundays #SolarSunday #Renewables #RenewablesNow #SolarPunkSunday
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Profoto Fresnel Small Promises Nostalgic, Cinematic Portrait Light https://petapixel.com/2024/06/18/profoto-fresnel-small-promises-nostalgic-cinematic-portrait-light/ #portraitlighting #fresnellens #portraiture #Equipment #lighting #fresnel #profoto #News
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Profoto Fresnel Small Promises Nostalgic, Cinematic Portrait Light https://petapixel.com/2024/06/18/profoto-fresnel-small-promises-nostalgic-cinematic-portrait-light/ #portraitlighting #fresnellens #portraiture #Equipment #lighting #fresnel #profoto #News
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Profoto Fresnel Small Promises Nostalgic, Cinematic Portrait Light https://petapixel.com/2024/06/18/profoto-fresnel-small-promises-nostalgic-cinematic-portrait-light/ #portraitlighting #fresnellens #portraiture #Equipment #lighting #fresnel #profoto #News
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Profoto Fresnel Small Promises Nostalgic, Cinematic Portrait Light https://petapixel.com/2024/06/18/profoto-fresnel-small-promises-nostalgic-cinematic-portrait-light/ #portraitlighting #fresnellens #portraiture #Equipment #lighting #fresnel #profoto #News
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Profoto Fresnel Small Promises Nostalgic, Cinematic Portrait Light https://petapixel.com/2024/06/18/profoto-fresnel-small-promises-nostalgic-cinematic-portrait-light/ #portraitlighting #fresnellens #portraiture #Equipment #lighting #fresnel #profoto #News
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Taken this day 2010, a model showing how a Fresnel lens in a lighthouse works (you can also just see me and my dad reflected in some of the glasses) https://www.flickr.com/photos/woolamaloo_gazette/5577392570/
#Edinburgh #photography #FresnelLens #Edimbourg #BlackAndWhitePhotography #Edimbourg #NationalMuseumOfScotland #lens #glass #science #engineering #lighthouse #museum #musee
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Taken this day 2010, a model showing how a Fresnel lens in a lighthouse works (you can also just see me and my dad reflected in some of the glasses) https://www.flickr.com/photos/woolamaloo_gazette/5577392570/
#Edinburgh #photography #FresnelLens #Edimbourg #BlackAndWhitePhotography #Edimbourg #NationalMuseumOfScotland #lens #glass #science #engineering #lighthouse #museum #musee
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Taken this day 2010, a model showing how a Fresnel lens in a lighthouse works (you can also just see me and my dad reflected in some of the glasses) https://www.flickr.com/photos/woolamaloo_gazette/5577392570/
#Edinburgh #photography #FresnelLens #Edimbourg #BlackAndWhitePhotography #Edimbourg #NationalMuseumOfScotland #lens #glass #science #engineering #lighthouse #museum #musee
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Taken this day 2010, a model showing how a Fresnel lens in a lighthouse works (you can also just see me and my dad reflected in some of the glasses) https://www.flickr.com/photos/woolamaloo_gazette/5577392570/
#Edinburgh #photography #FresnelLens #Edimbourg #BlackAndWhitePhotography #Edimbourg #NationalMuseumOfScotland #lens #glass #science #engineering #lighthouse #museum #musee
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Taken this day 2010, a model showing how a Fresnel lens in a lighthouse works (you can also just see me and my dad reflected in some of the glasses) https://www.flickr.com/photos/woolamaloo_gazette/5577392570/
#Edinburgh #photography #FresnelLens #Edimbourg #BlackAndWhitePhotography #Edimbourg #NationalMuseumOfScotland #lens #glass #science #engineering #lighthouse #museum #musee
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#Solar #Desalination Using #FresnelLens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho and Rubina Bahar, October 2020
"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
https://www.frontiersin.org/articles/10.3389/fenrg.2020.565542/full
-
#Solar #Desalination Using #FresnelLens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho and Rubina Bahar, October 2020
"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
https://www.frontiersin.org/articles/10.3389/fenrg.2020.565542/full
-
#Solar #Desalination Using #FresnelLens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho and Rubina Bahar, October 2020
"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
https://www.frontiersin.org/articles/10.3389/fenrg.2020.565542/full
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#Solar #Desalination Using #FresnelLens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho and Rubina Bahar, October 2020
"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
https://www.frontiersin.org/articles/10.3389/fenrg.2020.565542/full
-
#Solar #Desalination Using #FresnelLens as Concentrated Solar Power Device: An Experimental Study in Tropical Climate
Wing Sum Choong, Zhi Yong Ho and Rubina Bahar, October 2020
"Solar desalination is a renewable energy-driven method that produces freshwater from saline/brackish water. Conventional solar desalination units are equipped with an inclined transparent condensing plate placed over a feedwater basin containing saline water. The process is limited to a small quantity of production because of scattered solar irradiation and the unavailability of solar heat due to intermittent cloudy weather. In this study, a Fresnel lens has been used to concentrate solar energy onto a spot to increase the local temperature of feedwater and the evaporation rate. Flat Fresnel lenses on a double sloped passive solar still were used, where the focal points were adjusted to fall directly on the feedwater. The experiments were conducted for two different geometries and alongside the comparison between the conventional and the modified solar still; the number of Fresnel lenses was also varied. Saline solution with a concentration of 20,000 ppm was used as the feedwater. The research is aimed to be implemented for producing freshwater in the natural weather conditions of Malaysia. It was found that using two Fresnel lenses instead of a single large one gives a boost to the production of freshwater per unit solar irradiation by 39%. The produced water has a total dissolved solids (TDS) value of 37 ppm, which is well within the drinking water standard range according to the World Health Organization."
https://www.frontiersin.org/articles/10.3389/fenrg.2020.565542/full