TY - CONF AV - none N1 - cited By 0; Conference of 4th International Conference on Production, Energy and Reliability, ICPER 2014 ; Conference Date: 3 June 2014 Through 5 June 2014; Conference Code:106620 Y1 - 2014/// TI - Evaluation of redundancy for power generating unit in a cogeneration power plant KW - Cogeneration plants; Operating costs; Public utilities KW - Cogeneration power plants; Cogeneration systems; Net present value; Operation cost; Performance and reliabilities; Power generating units; Power generation systems; Redundancy systems KW - Redundancy SN - 2261236X A1 - Reshid, M.N. A1 - Majid, M.A.A. A1 - Muhammad, M. PB - EDP Sciences VL - 13 UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905017633&doi=10.1051%2fmatecconf%2f20141303010&partnerID=40&md5=6947d884c473d50eae7a0c7e6ed7536f CY - Kuala Lumpur N2 - Redundancy system is very useful to enhance the performance and reliability of the power generation system of a cogeneration plant. However, the associated operating cost of redundancy system is very high. The common redundancies used in a cogeneration power plant are public utility and generator set. In order to select the best redundancy options which incurs minimum operating cost, it is required to evaluate the cost of different redundancy options. In this paper, net present value model (NPV) is developed to evaluate the cost of redundancy considering availability and reliability of the cogeneration system. Two steps applied to evaluate the redundancy cost of the cogeneration system. The first step is predicting the number of failures and downtime hours using availability and reliability analysis because redundancy is frequently used when the system failed. The second step is evaluating the cost of redundancy using NPV model. The results indicate that the use of public utility as redundancy option is costly compared to generator set option for long period of time. The major operation cost of public utility is contributed by the maximum demand charge cost which is about 57.9 of the total cost of redundancy. The study will be useful as a guide for the cogeneration operation to evaluate and select the redundancy option. © 2014 Owned by the authors, published by EDP Sciences. ID - scholars5046 ER -