An availability simulation model and performance analysis of a coal handling unit of a typical thermal plant

 

 

S. Gupta^I; P.C. Tewari^II; A.K. Sharma^III

^IDepartment of Mechanical Engineering, Haryana College of Technology and Management, India sorabh_gupta123@rediffmail.com
^IIDepartment of Mechanical Engineering, National Institute of Technology Hamirpur, India pctewari1@rediffmail.com
^IIIDepartment of Mechanical Engineering, Deenbandhu Chhotu Ram University of Science & Technology, India avdhesh_sharma35@yahoo.co.in

 

 

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ABSTRACT

The present paper describes the development of an availability simulation model for Coal handling unit of a thermal plant by making the performance analysis using probabiltic approach. In the present paper, the Coal handling unit consists of five subsystems. Assuming constant failure and repair rates for all the subsystems, the mathematical formulation is based on Markov birth-death process. After drawing the transition diagram, differential equations are generated. After that, steady state probabilities are determined. One availability matrix is also developed, which provides various performance/availability levels for different combinations of failure and repair rates of all subsystems. Based upon various availability values obtained in the availability matrix and graphs of failure/repair rates of different subsystems, performance and optimum values of failure/repair rates for maximum availability of each subsystem are analyzed. Subsequently maintenance priorities are decided for all subsystems.

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OPSOMMING

Die artikel beskryf die ontwikkeling van 'n beskikbaarheidsimulasiemodel vir 'n steenkoolhanteringseenheid van 'n termiese aanleg deur gebruik te maak van werkverrigtingsanalise met 'n waarskynlikheidsbenadering. In die geval bestaan die hanteringseenheid uit vyf subsisteme. Onder die aanname van konstante faling- en hersteltempo's vir al die subsisteme word die wiskundige formulering gebaseer op die Markov geboorte-sterfte-proses. Nadat die oorgangsdiagram ontwikkel is, word differensiaalvergelykings gegenereer en waarna die gestadigde toestandwaarksynlikhede vasgestel word. Een beskikbaarheidsmatriks is verder ontwikkel wat toelaat vir verskillende werkverrigting-/beskikbaarheidsvlakke teen verskillende kombinasies van faling- en hersteltempo's van alle subsisteme. Gebaseer op verskillende beskikbaarheidswaardes verkry van die beskikbaarheidsmatriks en grafieke van die falings-/hersteltempo's van die onderskeie subsisteme, word werkverrigting en optimum waardes vir faling- en hersteltempo's vir maksimum beskikbaarheid van elke subsisteem ontleed. Vervolgens word instandhoudingsprioriteite vir elke subsisteem voorgehou.

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REFERENCES

[1] Rajpal, P.S., Shishodia, K.S. and Sekhon, G.S. 2006. 'An artificial neural network for modeling reliability, availability and maintainability of a repairable system', Reliability Engineering and System Safety, vol. 91, pp 809-819        [ Links ]

[2] Kurien, K.C. 1988. 'Reliability and availability analysis of repairable system using discrete event simulation', Ph. D. thesis, IIT, New Delhi.         [ Links ]

[3] Ciardo, G., Muppala, J. and Trivedi, K. 1989. 'Stochastic Petri Net Package', In: Proc. 3rd Int. Workshop on Petri Nets and Performance Models, Kyoto, Japan, 142-151.         [ Links ]

[4] Smotherman, M.K., Dugan, J.B., Trivedi, K.S. and Geist, R.M. 1986. 'The hybrid automated reliability predictor', AIAA Journal of Guidance, Control and Dynamics, 5(May/June), 319-331.         [ Links ]

[5] Butler, R. 1986. The SURE Reliability Analysis Program, AIAA Guidance, Navigation, and Control Conference, Williamsburg, VA, August 1986.         [ Links ]

[6] Koren, J.M. and Gaertner, J. CAFTA. 1987. 'A fault tree analysis tool designed for PSA', In: Proc. of Probabilistic Safety Assessment and Risk Management: PSA '87, Zurich, Switzerland, vol. 2, 588-592.         [ Links ]

[7] Sahner, R.A. and Trivedi, K.S. 1987. 'Reliability modeling using SHARPE. IEEE Trans Reliability' R36(2 (June)),186-193.         [ Links ]

[8] Sanders, W.H. and Obal II, W.D. 1993. 'Dependability evaluation using UltraSAN' In: Proc. of the Twenty-Third International Symposium on Fault- Tolerant Computing, 674-679.         [ Links ]

[9] Johnson, Jr. A.M. and Malek, M. 1988. 'Survey of software tools for evaluating reliability, availability, and serviceability', ACM Computing Surveys 20(4):227-269.         [ Links ]

[10] Butler, R.W. 1986. 'An abstract language for specifying Markov reliability models', IEEE Trans on Reliability , R35, 595-602.         [ Links ]

[11] Goyal, A., Carter, W.C., de Souza e Silva, E., Lavenberg, S.S and Trivedi, K.S. 1986. 'The system availability estimator', In: Proc. of the Sixteenth International Symposium on Fault-Tolerant Computing, Vienna, Austria, 84-89.         [ Links ]

[12] Govil, A.K. 1983. Reliability Engineering, Tata McGraw-Hill publishing company Ltd., New Delhi.         [ Links ]

[13] Sharma, A.K. 1994. "Reliability analysis of various complex systems in thermal power station", M.Tech Thesis, Kurukshetra University (REC Kurukshetra), Haryana, INDIA.         [ Links ]

[14] Dhillon, B.S. 1999. Design Reliability fundamentals and Applications, CRC Press LLC.         [ Links ]

[15] Balaguruswamy, E. 1984. Reliability Engineering, New Delhi, Tata McGraw Hill.         [ Links ]

[16] Dhillon, B.S. 1983. Reliability Engineering in Systems Design and Operation, New York, Van Nostrand-Reinhold.         [ Links ]

[17] Rotab Khan, M.R. and Zohrul Kabiret, A.B.M. 1995. Availability simulation of ammonia plant", Reliability Engineering and System Safety, vol.48, pp217-227.         [ Links ]

[18] Medhi, J. 1994. Stochastic Processes, New Age International, New Delhi.         [ Links ]

[19] Sahner, R.A., Trivedi K.S. and Puliafito, A. 1996. 'Performance and reliability analysis of computer systems', Boston, MA: Kluwer Academic        [ Links ]

[20] Be'ounes C et al., SURF-2. 1993. 'A program for dependability evaluation of complex hardware and software systems', In: 23rd Int. Symp. On Fault-Tolerant Computing, Toulouse, France, 668-673.         [ Links ]

[21] Krishnamurthi, G., Gupta, A. and Somani, A.K. 1996. 'The HIMAP modeling environment', In: Proceedings of the 9th International Conference on Parallel and Distributed Computing Systems, Dijon, France, September, 254-259.         [ Links ]

[22] Somani, A.K., Ritcey, J.A. and Au, S.H. 1992. 'Computationally efficient phased mission reliability analysis for systems with variable configuration',. IEEE Transactions on Reliability, 41(4 (December)):504-511.         [ Links ]

[23] Somani A.K, Sharma T and Nguyen P.H. 1994. 'Reliability computation of systems with latent-failures and monitoring', In: Proc. of 1994 Annual Reliability and Maintainability Symposium, 195-200.         [ Links ]

[24] Bernson, S, de Souza e Silva, E, and Muntz, R. 1991. 'A methodology for the specification of Markov Models', In: Stewart W, editor. Numerical Solution to Markov Chains. Boston, MA: Kluwer, 11-37.         [ Links ]

[25] Ramesh, A.V., Twigg, D.W., Sandadi, U.R., Sharma, T.C., Trivedi, K.S. and Somani, A.K. 1999. "An integrated reliability modeling environment", Reliability Engineering and System Safety, vol. 65, pp 65-75.         [ Links ]

[26] Choi, H., Kulkarni, V.G. and Trivedi, K.S. 1994. 'Markov regenerative stochastic petri nets. Performance Evaluation', 20:337-357.         [ Links ]

[27] Misra, K.B. 1992. Reliability analysis and prediction, Amsterdam: Elsevier.         [ Links ]

[28] Kotowrocki, K. 2001. 'On limit reliability functions of large multi-state systems with ageing components', Appl Math Comput 2001;121:313-61.         [ Links ]

[29] Pham, H., Suprasad, A. and Misra, R.B. 1996. 'Reliability analysis of k-out-of-n systems with partially repairable multi-state components', Microelectron Reliab 36:1407-15.J.-A. Li et al. / Reliability Engineering and System Safety 88 (2005) 93-98.         [ Links ]

[30] Kumar, D. and Pandey, P.C. 1993. 'Maintenance planning and resource allocation in urea fertilizer plant', Quality and reliability Engineering international journal, Vol. 9, pp 411-423.         [ Links ]

[31] Barabady, J. and Kumar, U. 2007. 'Availability allocation through importance measures', International journal of quality & reliability management, Vol. 24 No. 6, pp. 643-657.         [ Links ]

[32] Samrout, M., Yalaoui, F., Chatelet, E. and Chebbo, N. 2005. 'Few methods to minimize the preventive maintenance cost of series-parallel systems using ant colony optimization', Reliability Engineering and system safety, Vol. 89 No. 3, pp. 346-54.         [ Links ]

[33] Raje, D.V., Olaniya, R.S., Wakhare, P.D. and Deshpande, A.W. 2000. 'Availability assessment of a two-unit stand-by pumping system', Reliability Engineering and System Safety, vol. 68, pp 269-274        [ Links ]

[34] Thangamani, G. et al. 1995. 'Assessment of Availability of a Fluid Catalytic cracking unit through simulation', Reliability Engineering and System Safety, 47:207.         [ Links ]

[35] Shooman, M.L. 1996. 'Reliability Computation for Systems with Dependents Failures', Proceedings of IEEE Annual Symposium on Reliability, pp 44-56.         [ Links ]

[36] Kumar, S., Kumar, D. and Mehta, N.P. 1996. 'Behavioral Analysis of Shell Gasification and Carbon Recovery process in Urea Fertilizer Plant', Microelectron Reliability, 36(5), 671-673.         [ Links ]

[37] Srinath, L.S. 1994. Reliability Engineering, 3^rd edition, East-West Press Pvt. Ltd., New Delhi, India.         [ Links ]

[38] Khanduja, R., Tewari, P.C. and Kumar, D. 2008. 'Availability Analysis of Bleaching System of Paper Plant', Journal of Industrial Engineering, Udyog Pragati, N.I.T.I.E. Mumbai (India), 32(1), 24-29.         [ Links ]

[39] Kumar, S., Tewari, P.C., and Kumar, S. 2007. 'Performance Modeling and Simulated Availability of Shell Gasification and Carbon Recovery System of Urea Plant', Proceedings of the 16^th IASTED International Conference held at Spain, pp 409-413.         [ Links ]

[40] Gupta, S., Tewari, P.C. and Sharma, A.K. 2008. 'Reliability and availability analysis of ash handling unit of a steam thermal power plant', South African Journal of Industrial Engineering. (Accepted for publication)        [ Links ]

[41] Kumar, S., Kumar, D. and Mehta, N.P. 1999. 'Maintenance Management for Ammonia Synthesis System in a Urea Fertilizer Plant', International Journal of Management and System (IJOMAS), 15(3), 211-214.         [ Links ]

[42] Kumar, S., Tewari, P.C. and Sharma R. 2007. 'Simulated Availability of CO₂ Cooling System in a Fertilizer Plant', Industrial Engineering Journal (Indian Institution of Industrial Engineering, Mumbai), 36(10), 19-23.         [ Links ]

[43] Arora, N. and Kumar, D. 1997. 'Availability analysis of steam and power generation system in thermal power plant', Micro electron Relibility. Vol. 37(5), pp 95-99.         [ Links ]

[44] Sasson, J.R and Douglas, L., 2006. 'A conceptual integration of performance analysis, knowledge management, and technology: from concept to prototype', Journal of Knowledge Management, Vol. 10 no. 6, pp. 81-99.         [ Links ]

 

 

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