Investigating the collector efficiency of silver nanofluids based direct absorption solar collectors
By Meijie Chen, Yurong He, Jiaqi Zhu, Dongsheng Wen. 2016
236 citations recorded by the source corpus.
A one-dimensional transient heat transfer analysis was carried out to analyze the effects of the Nanoparticle (NP) volume fraction, collector height, irradiation time, solar flux, and NP material on the collector efficiency. The numerical results were compared with the experimental results obtained by silver nanofluids to validate the model, and good agreement was obtained. The numerical results show that the collector efficiency increases as the collector height and NP volume fraction increase and then reaches a maximum value. An optimum collector height (∼10 mm) and particle concentration (∼0.03%) achieving a collector efficiency of 90% of the maximum efficiency can be obtained under the conditions used in the simulation. However, the collector efficiency decreases as the irradiation time increases owing to the increased heat loss. A high solar flux is desirable to maintain a high efficiency over a wide temperature range, which is beneficial for subsequent energy utilization. The modeling results also show silver and gold nanofluids obtain higher photothermal conversion efficiencies than the titanium dioxide nanofluid because their absorption spectra are similar to the solar radiation spectrum.
Subfields: Biomedical Engineering, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/f63b4308ed05941dbc492662626e57a4bb1e4cb5
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In Biomedical Engineering
In Renewable Energy, Sustainability and the Environment
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- A. Mwesigye
- Murali Krishna Ghatkesar
- Rene Pecnik
- Mohammad Mehrali
- Evangelos Bellos
- Christos Tzivanidis
- Z. Huan
Citations in the corpus
- Optimal thermal and thermodynamic performance of a solar parabolic trough receiver with different nanofluids and at different concentration ratios (2017, background): “Chen et al.[32] considered the effect of using silver based nanofluids in a direct absorption solar energy collector.”
- Full-spectrum volumetric solar thermal conversion via graphene/silver hybrid plasmonic nanofluids (2018, background): “2 ppm The collector efficiency enhanced at higher collector height and nanoparticles volume fraction [11]”