Hydrogels beads for cooling solar panels: Experimental study

Abdo, Saber; Saidani-Scott, Hind; Benedi, Jorge; Abdelrahman, M.A.

doi:10.1016/j.renene.2020.02.057

Cited by 34 publications

(9 citation statements)

References 19 publications

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“…The experiment setup used in this study is similar to the setup in [18]. Experiments are done under two radiation intensities of 1000 W/m 2 and 800 W/m 2 to simulate the highest and medium solar intensities reaching the earth surface as reported in [20].…”

Section: Methodsmentioning

confidence: 99%

“…The containers for the three rows of nano saturated hydrogels were manufactured from Acrylic with rectangular slot perforation to allow for maximum air circulation. These number of rows were optimised for cooling solar panels earlier in [18].…”

Section: Methodsmentioning

confidence: 99%

“…Their results showed that using an attachment of 10 cm of activated alumina tablets with fins could effectively reduce the panel temperature by 9 ᵒ C compared with the un-cooled panel at fixed radiation intensity of 1000 W/m 2 for the test period of 6 hrs. Later on 2020, same team used hydrogel beads as a cooling attachment instead of activated alumina [18]. They tested different beads rows and their results revealed a temperature reduction of 10 ᵒ C compared with the un-cooled one at radiation intensity of 1000 W/m 2 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of using saturated hydrogel beads with alumina water-based nanofluid for cooling solar panels: Experimental study with economic analysis

Abdo

Saidani-Scott

2021

Solar Energy

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of using saturated hydrogel beads with alumina water-based nanofluid for cooling solar panels: Experimental study with economic analysis

Abdo

Saidani-Scott

2021

Solar Energy

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“…Abdo et al investigated the cooling performance of hydrogel beads in photovoltaic panels and the working temperature can be reduced by ≈10 K, resulting in a relative PCE increase of 7.2%, compared to that of c‐Si photovoltaic panels. [ 154 ] Additionally, Dida et al employed the burlap cloth to directly attach the rear surface of photovoltaic panels, which can enable a temperature drop of ≈20 K, corresponding to a relative PCE increase of 14.75%. [ 155 ] Moreover, Lv et al proposed the coupling of evaporative cooling with phase change materials, which can theoretically enhance the cooling performance of photovoltaic panels.…”

Section: Passive Evaporative Coolingmentioning

confidence: 99%

Passive Photovoltaic Cooling: Advances Toward Low‐Temperature Operation

Liu,

Zhou,

Zhou

et al. 2023

Advanced Energy Materials

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With the great increase in installation, photovoltaics will develop as the main power supply source for the world shortly. However, the actual power generation and lifetime of photovoltaics are greatly compromised by the high working temperature under outdoor operation. In this review, the recent advances of four promising passive photovoltaic cooling methods are summarized with the aim to uncover their working principles, cooling performance, and application potential in photovoltaic devices. For radiative cooling, light management strategies with ultraviolet‐photon downshift and sub‐bandgap reflection are discussed in detail to reveal their great potential in reducing photovoltaic working temperature and enhancing power generation. Subsequently, the great cooling benefits of passive evaporative cooling are underlined in terms of its superior cooling power and temperature drop of photovoltaic devices. Moreover, the promising integrated cooling strategy is further highlighted due to its great potential in enhancing electricity production and fresh water supply. Most crucially, the remaining challenges and the authors'r insights are presented to advance the commercial applications of passive cooling methods in photovoltaics.

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“…This composite hydrogel could dissipate considerable amount of latent heat thermal energy. Abdo et al 25 used saturated hydrogel for solar panel cooling in their solar simulator experiment. They observed that the temperature of solar panels drop by 9 and 9.6 ℃ at 600 and 1000 W/m² radiation.…”

Section: Introductionmentioning

confidence: 99%

Cooling enhancement using acacia gum based hydrogel in roof ponds: model room experimental analysis.

Joshi

2022

Preprint

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In this paper we report the observations of outdoor experiments which were carried out to test the cooling effect inside a model room due to evaporation from an acacia gum based hydrogel placed in an aluminium sheet roof pond. Unlike the direct evaporation from roof ponds, the hydrogels resist the evaporation rate and hence the trapped water particles could still provide the cooling effect on the next consecutive day. The experiments had three model rooms with only difference in the roof component: (a) bare aluminium sheet roof – considered as reference, (b) roof pond which contained only water, and, (c) roof pond containing acacia gum based hydrogel which was watered periodically. Two different sets of experiments were carried out: (1) The roof ponds were watered each day around 12 noon and (2) The roof ponds were maintained dry (not watered). In the first set of experiments, no significant difference in the air temperature of the model rooms on the first day was observed. But on the next consecutive day, around 2°C – 4°C difference was observed during the morning hours until both the roof ponds were watered again. The acacia gum and water mixture was used as hydrogel in the present experiments. The dilute solution (around 1:10 ratio) was observed to be reusable for several days without any bio-degradation. The second set of experiments showed that the heat transfer from the edges of the dry roof pond can be significant. The dry roof pond could cause 0.7°C – 1.2°C drop in average room air temperature between 6pm – 6am as compared to that of bare sheet roof. On the other hand, the same was observed to be around 1.3°C to 1.7°C in the case of dry roof pond with dry acacia gum. However, during day time, the room air temperature in the case of dry roof ponds was observed to be higher. Based on the present set of experiments, we concluded that the acacia gum can be a cost effective material for building cooling with reduced evaporation rate and the heat transfer from the edges of the roof pond can be significant.

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Hydrogels beads for cooling solar panels: Experimental study

Cited by 34 publications

References 19 publications

Effect of using saturated hydrogel beads with alumina water-based nanofluid for cooling solar panels: Experimental study with economic analysis

Effect of using saturated hydrogel beads with alumina water-based nanofluid for cooling solar panels: Experimental study with economic analysis

Passive Photovoltaic Cooling: Advances Toward Low‐Temperature Operation

Cooling enhancement using acacia gum based hydrogel in roof ponds: model room experimental analysis.

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