Experimental investigation of a direct absorption solar collector using ultra stable gold plasmonic nanofluid under real outdoor conditions

Kumar, Sanjay; Sharma, Vipin; Samantaray, Manas R.; Chander, Nikhil

doi:10.1016/j.renene.2020.10.017

Cited by 45 publications

(7 citation statements)

References 34 publications

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“…36 Nanoparticles of noble metals like gold (Au) and silver (Ag) can enhance photo-thermal conversion efficiency because of the localized surface plasmon resonance (LSPR) effect. [38][39][40] Nano-dispersions with such metallic nanoparticles that can support the LSPR effect are named plasmonic nanofluids. 41 Among plasmonic nanostructures, Ag is the most attractive metal owing to its high surface plasmon strength, which allows silver nanofluids with very low concentrations to exhibit considerable absorption and scattering properties at the resonance frequency.…”

Section: Nano-fluid Laden Direct Absorption Solar Collectormentioning

confidence: 99%

“…41 Among plasmonic nanostructures, Ag is the most attractive metal owing to its high surface plasmon strength, which allows silver nanofluids with very low concentrations to exhibit considerable absorption and scattering properties at the resonance frequency. Chen et al 40 investigated silver nanoparticles based DASC with 0.03% concentration and a maximum efficiency of 90% was achieved numerically. Filho et al 42 showed Ag nanoparticles have excellent absorption capabilities, and even with a small concentration of 6.5 ppm thermal efficiency enhancement of 144% was reported in novel DASCs.…”

Section: Nano-fluid Laden Direct Absorption Solar Collectormentioning

confidence: 99%

“…However, poor optical and thermophysical properties did not show the expected thermal efficiencies in such DASC systems 36 . Nanoparticles of noble metals like gold (Au) and silver (Ag) can enhance photo‐thermal conversion efficiency because of the localized surface plasmon resonance (LSPR) effect 38–40 . Nano‐dispersions with such metallic nanoparticles that can support the LSPR effect are named plasmonic nanofluids 41 …”

Section: Introductionmentioning

confidence: 99%

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Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Kumar

Chander

Singh

2022

Env Prog and Sustain Energy

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Solar desalination is a viable alternative for clean water for the areas where plenty of sunshine is available throughout the year. Due to less productivity of distilled water in passive solar still, it is still a challenge for the researchers to commercialize this low-cost renewable technology. In the last decade, much effort has been made by researchers to improve the overall productivity of solar stills by expanding novel active system methods. For the work presented here, a novel nanofluid-laden reverse-irradiated direct absorption solar collector (RI-DASC) augmented active solar still is proposed and tested under laboratory conditions for the very first time. Ag nanoparticles of sizes ~5-10 nm were used to prepare the nanofluids and were used as working fluid in the RI-DASC system. The system transfers the heat to the basin of active solar still directly omitting the need of piping arrangement. Experiments were conducted under different ambient conditions and for different mass loadings of Ag nanoparticles, that is, 0.1 mg L À1 , 0.2 mg L -1 , and 0.4 mg L À1 in RI-DASC augmented active solar still. The results showed that the temperature difference between the top glass cover and the basin of solar still was significantly higher in novel active solar compared to the conventional single slope passive still. Ag nanofluids with a mass fraction of 0.4 mg L À1 lead to a maximum temperature rise and thus overall thermal efficiency over other tested Ag nanofluids. The novel DASC augmented active solar still is practically viable using reflectors and can enhance the freshwater productivity over a conventional solar still.

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Section: Nano-fluid Laden Direct Absorption Solar Collectormentioning

confidence: 99%

Section: Nano-fluid Laden Direct Absorption Solar Collectormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Kumar

Chander

Singh

2022

Env Prog and Sustain Energy

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“…Du et al 14 discussed the utility of different shapes of gold nanoparticles in VASC for achieving broadband absorption. Kumar et al 15 used mono‐spherical gold nanoparticles in a full‐scale VASC system, and through outdoor sun testing, demonstrated an efficiency improvement of 33% compared to DI water. Wen et al 16 utilized ZrC/TiN‐based nanofluids with a concentration of 160 ppm and found a PTE of 73.7%, which is 31% higher than base fluid.…”

Section: Introductionmentioning

confidence: 99%

Real‐time thermal performance investigation of a thermal energy storage integrated direct absorption solar collector under tropical climate

Gupta,

Kumar,

Kukreja

et al. 2024

Energy Storage

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In the last two decades, metallic particles of nano sizes (~10−9 m) have been tested profoundly in volumetric absorption solar collectors (VASC) due to their excellent optical properties and broadband absorption in the entire solar spectrum. However, very limited studies are available for understanding the performance of integrated energy storage VASC systems using nanofluids. For the experimental work presented here, a hybrid nanofluid of gold nanoparticles in Azadirachta indica leaves extract has been synthesized by chemical route. The prepared hybrid nanofluid has shown good absorption in 400 to 700 nm wavelength range and hence achieved high photo‐thermal conversion efficiency for tested VASC system. Furthermore, commercially available paraffin wax is used as a phase change material (PCM) in thermal energy storage (TES) and further integrated with VASC to analyze the thermal performance of the system even after sunshine hours. The real‐time experiments were conducted using different working fluids, and at three mass flow rates, that is, 0.008 kg/s, 0.016 kg/s, and 0.033 kg/s, respectively, during mild winter days in the tropical climate of India. The study revealed a photo‐thermal efficiency enhancement of about 17.1% when hybrid heat transfer fluid was used in the VASC system with TES as compared to base fluid water but without TES. During the heating period, the maximum thermal gain of the hybrid nanofluid was observed to be about 15°C higher than the ambient temperature at mass flow rate of 0.033 kg/s. Thermal efficiency enhancement of about 23.8%, 24%, and 24.1% was observed with hybrid nanofluid compared to base fluid water at a mass flow rate of 0.008 kg/s, 0.016 kg/s, and 0.033 kg/s, respectively, when PCM was kept inside the tank. Furthermore, a maximum zero loss efficiency of 83.8% was estimated at an optimal mass flow rate of 0.033 kg/s for the TES‐integrated VASC system.

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“…In recent years, the nanofluids with different types of nanoparticles, such as carbon materials, 9,10 semiconductors, 11,12 and noble metal nanoparticles, 13–17 have been investigated and discussed extensively in DASCs. Among them, the noble metal nanoparticles could enhance the light capture ability of the HTF due to its localized surface plasmon resonance (LSPR) in specific wavelength range 18 .…”

Section: Introductionmentioning

confidence: 99%

Investigation on stable TiN plasmonic nanofluids for applications in direct absorption solar collectors

Wang

Han

Huang

et al. 2023

Env Prog and Sustain Energy

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TiN nanoparticles based plasmonic nanofluids exhibit promising results in performance improvement of direct absorption solar collectors, but the main issue for practical application is their poor stability. In this work, ethylene glycol (EG) based TiN nanofluids with polyacrylic acid (PAA) stabilizing ligand were prepared. The optical properties of the TiN-PAA/EG nanofluids with concentration ranging from 10 to 100 mg/L were characterized. The solar weighted absorption fraction of 99.55% is achieved at the optical depth of 1 cm when the concentration of the TiN-PAA/EG nanofluids is 100 mg/L. In addition, the experimental results of the long-term stability indicated that the TiN-PAA/EG nanofluid retained excellent dispersion stability after ambient storage of 250 days. Then, the stability of TiN-PAA/EG nanofluids upon prolonged heating cycle and accelerated ultraviolet (UV) irradiation was investigated.The results showed that TiN-PAA/EG nanofluid with concentration of 75 mg/L presents superior thermal stability after prolonged heating cycles at 120 C and excellent photostability after 30 days of UV irradiation. Finally, the photo-thermal conversion performance for TiN-PAA/EG nanofluids was studied. The stagnation temperature of the 100 mg/L TiN-PAA/EG nanofluids after light irradiation of 2 h reaches up to 80.12 C. The specific absorption rate of the prepared TiN-PAA nanofluids is demonstrated higher than that of reported TiN nanofluids.

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Experimental investigation of a direct absorption solar collector using ultra stable gold plasmonic nanofluid under real outdoor conditions

Cited by 45 publications

References 34 publications

Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Real‐time thermal performance investigation of a thermal energy storage integrated direct absorption solar collector under tropical climate

Investigation on stable TiN plasmonic nanofluids for applications in direct absorption solar collectors

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