OCTOBER 19-20, 2012 - YMCA University of Science & Technology

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Proceedings of the National Conference on Trends and Advances in Mechanical Engineering, YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012 efficiency, LP/HP heater performance, turbine heat rate etc. These figures should be checked with the design, last month’s performance, best performance of the unit and best performance of similar other units in the station. • Milling system maintenance and air preheated maintenance should be given the top priority based on the performance monitoring parameters and ensure timely replacement of worn out parts to ensure reliable output. • Grid monitoring of Oxygen and CO to ensure a complete combustion and control combustion air to limit the dry gas losses. • Installation of reliable rotary gravimetric feeders to ensure the coal quantity feed into the mill and indirectly to boiler to get an online assessment of boiler performance. • Up gradation of C&I system to replace the obsolete technology and installation of more close loop controls to avoid manual interference. • Major maintenance of CW system and cooling towers to achieve quality and Retrofitting of Electro hydraulic control system with auto starting of turbine system with motorized drains to meet the new grid codes and fast response to variation in demand and auto operation, • Shift wise monitoring of operating controllable parameters and merit order operation concept to gain efficiency and availability. • The results of monthly performance monitoring of the station should be discussed in a meeting taken by the Head of the plant and remedial action plan including action on urgent financial issues, should be decided in the meeting. • Provision of computer software for performance monitoring, maintenance planning and for simulation studies at the plant site may be considered. Spare planning and inventory management tools to be incorporated to avoid the delay in maintenance duration and non availability of spares. • Annual overhaul of units and auxiliaries should be done regularly based on the performance deterioration. Assessment to be made before and after to access the techno economical gain as far as possible. Activities to, be planned as far as possible on account of system demands. • Manufacturer’s maintenance manuals for different equipments and operating guide lines should be available in plant office. Senior officers during their inspections should ascertain that the instructions of the manuals are being followed. • Retrofitting energy efficient hydro drive system for conveyors more than75 KW capacity • Important work instructions pertaining to particular equipments should be displayed close to the equipment at an appropriate place. • CFD modeled ducts to reduce the duct pressure losses and implementing VVF drives to reduce the auxiliary power consumption to be incorporated to update the unit performance to meet the latest demands. • Retrofitting dry rotary compressors with HOC (heat of compressor for regeneration) drier in place of old compressors to maintain better instrument air and service air to meet the modern pneumatic instruments. • Retrofitting the latest development in purification like RO system etc to make quality DM water from the deteriorated input water available. • Retrofitting the dry bottom ash system with recirculation to reduce the water consumption and utilization of bottom ash. • Charging the auxiliary header from CRH at rated load condition to reduce the energy loss of conversion to low pressure steam. • Utilizing the waste heat to retrofit the VAM (Vapor absorption machines) refrigeration system in place of HVAC system. • Energy efficient lighting system to utilize the latest LEDs to reduce the life cycle cost. • One of the major causes for the poor performance is the poor housekeeping which needs immediate attention and close monitoring by top management. It has already proven that this will reduce the maintenance cost and increase the availability. • Establishing a separate company at loading point or a centralized location ( coal conditioning company) to condition or blend the coal and supply the proper size coal (1mm to 5mm size) in ensured quality ( without stones and controlled calorific value and ash content) can reduce the losses to minimum and reduce the auxiliary power consumption . They can do the blending and first grinding and separation; This Company can utilize the low calorific reject coal in the low capacity CFBC/PFBC technology and meet the heat and power requirement for coal conditioning. This will ensure reliability and availability of high capacity Most efficient units and reduce the partial and force outage to minimum. Major partial outages were observed due to variation and non availability of coal for bigger capacity high efficiency units. This will reduce the high quality grinding media consumption and outage of high capacity units. 3. Conclusion In this paper, a review on energy analysis of the thermal power station has been carried out using the methods of thermodynamic analysis by considering the ratio of energy generated per annum to the amount of the fuel consumed and the other involves products of the plants thermal efficiency and the efficiencies of the boiler, 178
Proceedings of the National Conference on Trends and Advances in Mechanical Engineering, YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012 turbines and generator. In this paper, the various performance evaluation parameters are suggested which are mentioned in section 2.3. Based on these parameters, three categories of recommendations are incorporated which are short term, medium term and long term. The short term, medium term and long term categories of recommendations suggests the overall working performance of the plant. Lesser consumption of input will not only reduce the cost of electricity generation there by enhancing the competitiveness but also make available the scarce inputs to generate more and more electricity. References [1] Santosh K. Brhera, and Ambika P. dash, Performance analysis of coal fired power plant in India Proceedings of the 2010 International Conference on Industrial Engineering and Operations Management Dhaka, Bangladesh, January 9-10, 2010 [2] Behera S.K, Dash A.P, Farooquie J.A, (2009), Performance evaluation and efficiency analysis of coal Fired Thermal Power Plants in India [3] Chitkara Puneet, a Data Envelopment Analysis Approach to Evaluation of Operational Inefficiencies in Power Generating Units: A Case Study of Study of Indian Power Plants, IEEE Transactions on Power System, Vol.14, No.2, May1999 [4] K .R. Shanmugam and Kulshreshtha Praveen, Efficiency analysis of coal-based thermal power generation in India during post-reform era, Int. J. Global Energy Issues, Vol. 23, No.1, 2005 [5] Mohan, M., Gandhi, O.P., and Agrawal, V.P., Systems modeling of a coal based steam power plant proceeding of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, volume 217, pages 259-277, number 3, 2003 [6] Gupta S., Tewari P.C., Sharma A.K.,A Markov Model for Performance Evaluation of Coal Handling Unit of a Thermal Power Plant, Journal of Industrial and System Engineering Vol.3, No.2,pp 85-96 [7] Gupta S., Tewari P.C.,Simulation Model for stochastic Analysis and Performance Evaluation of Condensate System of a Thermal Power Plant, Bangladesh J. Sic. Ind. Res. 44(4), 387,398,2009 [8] Gupta S., Tewari P.C., Simulation modeling and analysis of a complex system of a thermal power plant, Journal of Industrial Engineering and Management Vol.2, No.2,pp 387-406 [9] Pradip Kumar Mandal, (2001) Efficiency improvement in Pulverized coal based power stations. [10] Hogg, B.W. and Swidenbank E.and Prasad G., A Novel Performance Monitoring Strategy for Economical Thermal Power Operation, IEEE Transactions on Energy Conversion, Vol.14, No.3, September1999 [11] C.H. Liu, Sue J Lin, and Charles Lewis, Evaluation of thermal power plant operational performance in Taiwan by data envelopment analysis, Energy Policy Journal of Elsevier,vol 38, Issue 2, pp1049- 1058,2010 [12] Gupta S., Tewari P.C., Sharma A.K, A Probalistic model for performance evaluation of steam and water system of a thermal power plant. International Journal of Management Science and Engineering Management vol.4, No3, pp.177-187, 2009. [13] Garg R.K., Agrawal V.P., Gupta V.K., Coding, Evaluation and Selection of Thermal Power Plants-A MADM approach, Electrical Power and Energy System 29 (2007) 657-668 [14] Look, D.C and Sauer, H.J., Engineering Thermodynamics, pp257-319, 1986. [15] Utgikar,P.S, Dubey,S.P and Rao,P.J.P, Thermo economic Analysis of Gas Turbine Cogeneration Plant, A Case Study, Proceeding of Institute of Mechanical Engineering, VOL.209,PP45-54.1995. [16] www.unilag.edu.ng/opendoc.php 179
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NATIONAL CONFERENCE ON TRENDS AND A
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MESSAGE I am pleased to learn that
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Sr. No Proceedings of National Conf
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Proceedings of National Conference
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Akash Equipments & Machineries (P)
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3. MATHEMATICAL FORMULATION Proceed
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Before mounting electro turbo gener
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Input of Station = Energy sent out
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OUTPUT Proceedings of the National
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6.2 Effect of input factors on Surf
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1 Proceedings of the National Confe
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3 Al-Al Compound Casting using high
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7 Mg shell and Al core Disintegrat
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• Enhanced operational safety •
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5. Conclusion Proceedings of the Na
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3.2 Effect of Different Dielectric
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3. Results and Discussions Proceedi
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S. No. A= Handle B= Box size C= Wor
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5. Select Factors to be Studied 6.
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II. III. IV. Proceedings of the Nat
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References Proceedings of the Natio
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Sl No. Sequence of operation Table
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‣ Maximize the degree of efficien
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4.5.2 Government’s Initiative Pro
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Title of paper Proceedings of the N
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OCTOBER 19-20, 2012 - YMCA University of Science & Technology

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