Hilmi Fachri Novaldi, Avita Ayu Permanasari, Sukarni Sukarni, Poppy Puspitasari
The thermal performance of water-based MWCNT (multi-wall carbon nanotubes) nanofluids on a DASC (direct absorption solar collector) device as a working fluid is discussed in this paper. To increase the photothermal conversion efficiency of the solar collector, volume fractions of 0.1%, 0.3%, and 0.5% are used. The synthesis of nanofluids involved a surfactant polyvinylpyrrolidone (PVP) with a mass fraction of 0.02%. After being exposed under a solar simulator with an intensity of 1000 W/m2 in 600 s, the volume of fluid in a 100 ml beaker is used and covered by a rockwool insulator, three thermocouples are placed horizontally with a distance of 1.5 cm each point and the top thermocouple is 2 cm from the lip. beaker glass. The results show that the addition of MWCNT nanoparticles significantly increases the photothermal conversion efficiency and reduces the effect of heat release on the nanofluids. Based on the improved optical and thermal properties, MWCNT nanofluids can effectively promise to increase the overall efficiency of DASC solar collectors. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Malang, Semarang No. 5, Malang, 65145, Indonesia; Centre of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Semarang No. 5, Malang, 65145, Indonesia
