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Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels

机译：Biosynthesized二氧化硅纳米柱作为抛物面太阳能电池板中的热流体

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In this work, the production of biologically synthesized silica nanoparticles was proposed to prepare a nanosuspension as a thermal fluid in parabolic solar panels at the laboratory level. Silica nanoparticles were produced from construction sand in two stages. Biosynthesis broth was produced by Aspergillus niger aerated fermentation in a 1 L bioreactor for 9 days. Each supernatant was contacted with 18% construction sand in a 500 L reactor with mechanical agitation, at a temperature of 25 °C, and a contact time of 30 min. Subsequently, the separation process was carried out. For day 9, a pH value of 1.71 was obtained as well as acid concentrations of 15.78 g/L for citrus and 4.16 g/L for malic. The metal extraction efficiency of Si nanoparticles was 19%. The vibration peaks in the FTIR were characteristic of the presence of silica nanoparticles in wavenumbers 1020 cm−1 and 1150 cm−1. Finally, a prototype solar radiation test bench for parabolic systems was built and provided with a radiation source that falls on a translucent pipe that transports the nanoparticles, which has a pump and a series of thermocouples. The heat capacity of the biotechnologically produced silica nanoparticle suspension was 0.72 ± 0.05 kJ/kgK, using material and energy balances in the flow circuit.
机译：在这项工作中，提出了生物合成的二氧化硅纳米粒子的生产，以在实验室水平的抛物线太阳能电池板中作为热流体制备纳米柱。二氧化硅纳米粒子由两个阶段的施工砂制备。 BioSynthesis汤通过Aspergillus Niger Aerated发酵在1L生物反应器中产生9天。将每种上清液与18％结构砂中的500μl反应器中的施工砂接触，在25℃的温度下，接触时间为30分钟。随后，进行分离过程。对于第9天，获得的pH值为1.71，苹果酸浓度为15.78g / L.苹果酸的4.16g / L. Si纳米粒子的金属提取效率为19％。 FTIR中的振动峰是在波数1020cm-1和1150cm-1中存在二氧化硅纳米颗粒的特征。最后，构建抛物面系统的原型太阳辐射试验台，并设有辐射源，该辐射源落在运输纳米颗粒的半透明管上，该辐射管道具有泵和一系列热电偶。生物技术生产的二氧化硅纳米粒子悬浮液的热量为0.72±0.05kJ / kgk，在流动回路中使用材料和能量平衡。

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