Satyanarayanan Seshadri

Bio: Satyanarayanan Seshadri is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Laser-induced breakdown spectroscopy & Organic Rankine cycle. The author has an hindex of 3, co-authored 15 publications receiving 33 citations.

A polarization-resolved light scattering method for eliminating the interference of water aerosol in industrial stack PM measurement

Abstract: In this study we report polarization resolved intensity measurements for flyash and water aerosol, respectively, in an industrial stack like environment, for the purpose of developing a methodology...

Nanosecond and Femtosecond Laser Induced Breakdown Spectroscopic Studies of Coal and Ash

Abstract: Nanosecond and femtosecond laser Induced Breakdown Spectroscopy (ns- and fs-LIBS)were used for elemental analysis of Indian coal and ash. Emissions from C, Na, K, Al, Fe, Ca and molecular CN were identified and analyzed.

Evaluation and optimization of a novel geothermal-driven hydrogen production system using an electrolyser fed by a two-stage organic Rankine cycle with different working fluids

Abstract: In this study, a novel system comprising of a two-stage organic Rankine cycle, driven by geothermal energy and coupled with a proton exchange membrane electrolyser, is investigated and optimized from thermodynamic and exergoeconomic viewpoints. Various working fluids are considered so as to ascertain the effects of thermophysical properties on the performance of the system. The electricity output from the two-stage organic Rankine cycle is employed to produce hydrogen through electrochemical reactions in the proton exchange membrane electrolyser. The effects are assessed on key parameters of variations in geothermal water temperature and the pressure ratio of high-pressure organic Rankine cycle turbine. Considering three distinct cases, a thorough optimization is performed utilizing a genetic algorithm. It is concluded that a 2-3 percent-point improvement in energy efficiency, as well as a 35% to 41% increase in hydrogen production and a 9.5% to 12% reduction in cost per unit exergy of hydrogen can be achieved via optimization. R123 is shown in the optimization to perform the best among the considered working fluids, with isopentane performing second best.

A review of laser-induced breakdown spectroscopy for plastic analysis

Abstract: With massive coal consumption in the industry, the increasing requirements for improving combustion efficiency and environmental protection raise widespread interests. Laser-induced breakdown spectroscopy (LIBS) shows the merits of high-speed, minimally destructive, simple preparation, etc. Combining it with the analytical chemistry methods have become a promising way for coal analysis. In this work, LIBS instruments for collecting coal spectra, pretreatment methods for coal samples, preprocessing of coal data, and analytical chemistry methods for coal analysis were summarized. Moreover, LIBS applications, including coal ranks, combustion efficiency, and environmental protection, are provided. Finally, this review proposes a description of limitations and the potential developing trend for this topic.

Vanadium redox flow batteries: Flow field design and flow rate optimization

Abstract: Vanadium redox flow battery (VRFB) has attracted much attention because it can effectively solve the intermittent problem of renewable energy power generation. However, the low energy density of VRFBs leads to high cost, which will severely restrict the development in the field of energy storage. VRFB flow field design and flow rate optimization is an effective way to improve battery performance without huge improvement costs. This review summarizes the crucial issues of VRFB development, describing the working principle, electrochemical reaction process and system model of VRFB. The process of flow field design and flow rate optimization is analyzed, and the battery attributes and metrics for evaluating VRFB performance are summarized. The focus of the research is the methods of flow field design and flow rate optimization, and the comprehensive comparison of battery performance between different flow field designs. Literature analysis shows that reasonable flow field design can improve the uniformity of electrolyte, improve battery attributes and metrics, and thus improve the overall performance of VRFB and reduce the cost.