M. Suresh

Bio: M. Suresh is an academic researcher from Sri Sivasubramaniya Nadar College of Engineering. The author has contributed to research in topics: Heat transfer & Heat exchanger. The author has an hindex of 10, co-authored 25 publications receiving 278 citations. Previous affiliations of M. Suresh include Indian Institute of Technology Madras.

3-E analysis of advanced power plants based on high ash coal

Abstract: The objective of the study is to identify the ‘best’ possible power plant configuration based on 3-E (namely energy, exergy, and environmental) analysis of coal-based thermal power plants involving conventional (subcritical (SubC)) and advanced steam parameters (supercritical (SupC) and ultrasupercritical (USC)) in Indian climatic conditions using high ash (HA) coal. The analysis is made for unit configurations of three power plants, specifically, an operating SubC steam power plant, a SupC steam power plant, and the AD700 (advanced 700°C) power plant involving USC steam conditions. In particular, the effect of HA Indian coal and low ash (LA) reference coal on the performance of these power plants is studied. The environmental impact of the power plants is estimated in terms of specific emissions of CO2, SOx, NOx, and particulates. From the study, it is concluded that the maximum possible plant energy efficiency under the Indian climatic conditions using HA Indian coal is about 42.3% with USC steam conditions. The results disclose that the major energy loss is associated with the heat rejection in the cooling water, whereas the maximum exergy destruction takes place in the combustor. Further, the sliding pressure control technique of load following results in higher plant energy and exergy efficiencies compared to throttle control in part-load operation. Copyright © 2009 John Wiley & Sons, Ltd.

Dry Sliding Wear and Mechanical Behavior of Aluminium/Fly ash/Graphite Hybrid Metal Matrix Composite Using Taguchi Method

Abstract: The experimental investigation of hybrid metal matrix composites with fly ash and graphite reinforced aluminium alloy (Al 6061) composites samples, processed by stir casting route are reported. The aluminium alloy was reinforced with 3 wt.%, 6 wt.%, 9 wt.% fly ash and fixed 3 wt.% of graphite to mixture the hybrid composite. Hardness of the hybrid composite were tested it was found that when the hardness of the hybrid composites can be increased when compared to (Al 6061). The parameters such as load, sliding speed, and reinforcement content were identified will affecting wear rate. The design of experiments (DOE) approach using taguchi method was employed to analyze the wear behavior of hybrid composites. Signal-to-noise ratio and analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate.

Thermodynamic analysis of a coal-fired power plant repowered with pressurized pulverized coal combustion

Abstract: Fossil fuels, coal, and natural gas, contribute a major share of electricity generated in India as well as the world and will continue to do so well into the future. With the justified concern of their rapid depletion and the environmental impacts associated with their large-scale use, there is a quest for advanced coal-fired power generation technologies which are energy efficient and environmental friendly. This study analyses the thermodynamic performance of an existing 62.5 MWe conventional Rankine cycle power plant using pulverized coal firing (PF) (reference plant with atmospheric pulverized coal combustion) repowered with a new and potentially advantageous technology, namely, pressurized pulverized coal firing in a combined cycle (PPCC) power plant. The performance of power plants is determined based on energy and exergy analysis. The energy and exergy efficiencies of the PF plant are estimated to be 28.3 and 25.9 per cent, respectively, whereas the PPCC power plant results in a significant increase of 6.3 and 5.7 per cent points, respectively, over the PF plant. Moreover, PPCC power plant results in an increase of about 2.6 times in the gross plant output (162 MWe) compared with the PF power plant. The gas turbine alone contributes to an additional 100 MWe when the steam turbine output is maintained constant at 62.5 MWe as in reference PF power plant.

Aluminium matrix hybrid composites: a review of reinforcement philosophies; mechanical, corrosion and tribological characteristics

Abstract: Aluminium hybrid composites are a new generation of metal matrix composites that have the potentials of satisfying the recent demands of advanced engineering applications. These demands are met due to improved mechanical properties, amenability to conventional processing technique and possibility of reducing production cost of aluminium hybrid composites. The performance of these materials is mostly dependent on selecting the right combination of reinforcing materials since some of the processing parameters are associated with the reinforcing particulates. A few combinations of reinforcing particulates have been conceptualized in the design of aluminium hybrid composites. This paper attempts to review the different combination of reinforcing materials used in the processing of hybrid aluminium matrix composites and how it affects the mechanical, corrosion and wear performance of the materials. The major techniques for fabricating these materials are briefly discussed and research areas for further improvement on aluminium hybrid composites are suggested.

Thermo-economic-environmental multiobjective optimization of a gas turbine power plant with preheater using evolutionary algorithm

Abstract: In this study, the gas turbine power plant with preheater is modeled and the simulation results are compared with one of the gas turbine power plants in Iran namely Yazd Gas Turbine. Moreover, multiobjective optimization has been performed to find the best design variables. The design parameters of the present study are selected as: air compressor pressure ratio (rAC), compressor isentropic efficiency (ηAC), gas turbine isentropic efficiency (ηGT), combustion chamber inlet temperature (T3) and gas turbine inlet temperature. In the optimization approach, the exergetic, economic and environmental aspects have been considered. In multiobjective optimization, the three objective functions, including the gas turbine exergy efficiency, total cost rate of the system production including cost rate of environmental impact and CO2 emission, have been considered. The thermoenvironomic objective function is minimized while power plant exergy efficiency is maximized using a genetic algorithm. To have a good insight into this study, a sensitivity analysis of the results to the interest rate as well as fuel cost has been performed. In addition, the results showed that at the lower exergetic efficiency in which the weight of thermoenvironomic objective is higher, the sensitivity of the optimal solutions to the fuel cost is much higher than the location of Pareto Frontier with the lower weight of thermoenvironomic objective. Copyright © 2010 John Wiley & Sons, Ltd.