Mechanical Engineering, Renewable Energy, Sustainability and the Environment, Energy
15
Scopus Publications
Scopus Publications
Phase change materials in domestic solar energy systems Subramaniyan Chinnasamy, K.B. Prakash, Arivazhagan Sampathkumar, Yasir Ali Bhutto Navigating A Sustainable Future with Phase Change Materials for Energy Storage, 2026
Comprehensive Spectroscopic and Chromatographic Analysis of Waste Fish Oil Biodiesel using NMR, GC-MS, and FTIR Techniques for Sustainable Alternative Fuel Production Malaysian Journal of Chemistry, 2025 This study presents a comprehensive characterization of wastes fish oil biodiesel using spectroscopic and chromatographic techniques, including Gas Chromatography-Mass Spectrometry (GC-MS), Fourier Transform Infrared Spectroscopy (FTIR), and Nuclear Magnetic Resonance (NMR) spectroscopy.The primary objective was to evaluate the molecular composition, purity, and structural integrity of biodiesel derived from waste fish oil through transesterification.GC-MS analysis identified a diverse range of fatty acid methyl esters (FAMEs), including saturated, monounsaturated, and polyunsaturated esters, reflecting the high degree of unsaturation characteristic of waste fish oil.The analytical results show successful transesterification of the detection of methyl tetradecanoate, 9-hexadecenoic acid methyl ester, and polyunsaturated eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) FAMEs.The characteristic ester carbonyl (1745 cm), aliphatic chain (2923 cm and 2853 cm) and double bond (1650 -1600 cm) absorption bands detected through FTIR Spectroscopy confirmed the investigation conclusions.The NMR spectroscopy provided molecular information through H-NMR and C-NMR spectra which demonstrated that methyl esters appeared with signals at 3.6-3.7 ppm and 51.0-51.8ppm while unsaturation levels became evident in the 127.0-130.0ppm region.The results emphasis the process optimization because analysis shows the presence of phthalate derivatives and residual glycerol derivatives as well as other minor impurities.This study highlights the potential of waste fish oil as a sustainable feedstock for biodiesel production, contributing to renewable energy solutions and addressing environmental challenges.
Enhancement of Yield in Single Slope Solar Still by Composite Heat Storage Material—Experimental and Thermo-Economic Assessment Arivazhagan Sampathkumar, Subbarama Kousik Suraparaju, Sendhil Kumar Natarajan Journal of Solar Energy Engineering Transactions of the ASME, 2023 The main objective of this study is to enhance the yield of single slope solar still by extending the operating time of solar still by utilizing composite heat storage materials in the solar still. In this regard, the effect of the composite heat energy storage material developed by the mixture of beach sand with paraffin wax is investigated. The experiments are carried out in solar still with composite heat storage material (SSCHSM), and results are compared with solar still with sensible heat storage material (SSSHSM), solar still with latent heat storage material (SSLHSM), and conventional solar still (CSS). The outcome of the two days’ results showed that the total yield of SSCHSM, SSLHSM, SSSHSM, and CSS are 2050, 1880, 1420, and 1250 mL/m2, respectively, on day 1 whereas on day 2 it is 2950, 2680, 2000, and 1820 mL/m2. The thermal analysis results indicated that the average thermal efficacy of SSCHSM, SSLHSM, SSSHSM, and CSS is 21.59%, 19.83%, 14.92%, and 13.16%, respectively, on day 1 and day 2 it is 27.42%, 24.94%, 18.59%, and 16.89%. The economic analysis revealed that the cost per liter and payback month of SSCHSM are $ 0.031 and 6.2 months, whereas the cost per liter for SSLHSM, SSSHSM, and CSS was $ 0.034, $ 0.044, and $ 0.048, respectively. Moreover, the payback period for SSLHSM, SSSHSM, and CSS was 6.8 months, 8.8 months, and 9.7 months, respectively.
Experimental investigation of single slope solar still with Eucheuma (agar-agar) fiber for augmentation of freshwater yield: Thermo-economic analysis Arivazhagan Sampathkumar, Sendhil Kumar Natarajan Environmental Progress and Sustainable Energy, 2022 Abstract The accessibility of pure drinking water is one of the most complex challenges that humankind experiencing around the world. In this study, the experimental investigation has been carried out in the single slope solar still by the incorporation of naturally available Eucheuma fiber in the absorber basin. The Eucheuma fiber has high water absorbing capacity and acts like a wick material. The experimental results on two consecutive days in the month of February 2021 shows that the solar still with agar‐agar fiber (SSAAF) has an increase in productivity of 22.06% on Day 1 and 21.05% on Day 2 in comparison with conventional solar still (CSS). The freshwater productivity of SSAAF was 3150 ml/m 2 /day on Day 1 and 3800 ml/m 2 /day on Day 2, whereas for CSS it was 2600 and 3100 ml/m 2 /day on Day 1 and Day 2, respectively. The thermal efficiency was increased by 10% and 13% on Day 1 and 2 for SSAAF. The economic analysis indicates that SSAAF has a payback period of 4.3 months whereas CSS has 5.1 months. The cost per liter of freshwater is about $ 0.026 and $ 0.022 for CSS and SSAAF, respectively.