IOSR Journal of Engineering (IOSRJEN) www.iosrjen.org ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 08, Issue 8 (August. 2018), ||V (I) || 51-57 International organization of Scientific Research 51 | P a g e Steady State Behaviour of a Cold Standby System Consisting of Turbine, Boiler and Fans Upasana Sharma* 1 , Gunjan Sharma* 2 * Department Of Statistics, Punjabi University, Patiala Corresponding Author: Upasana Sharma*1 Abstract: Electricity plays a vital role in any industrial engineering system. The power plant system in any industry serves as a backbone to it. The paper deals with the steady state behaviour of a cold standby system operating in a power plant system. The system comprises of a turbine, a high pressure boiler, a cold standby unit: three low pressure boilers and three fans: PA fan, FD fan and ID fan. A cold standby unit which comprises of three low pressure boilers acts as a redundant system for main high pressure boiler. The analysis has been done based on the real data. There is only one technician available to do the desired job of repair or replacement as per requirement of the failure. Various parameters for effectiveness of the system have been computed using Semi Markov process and regenerative point technique. Graphical study along with interpretation has also been done to study the behaviour of the reliability and cost benefit analysis of the present study. Keywords: Standby systems; Semi Markov process; Regenerative point technique. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 20-07-2018 Date of acceptance: 04-08-2018 --------------------------------------------------------------------------------------------------------------------------------------- I. INTRODUCTION In Industrial engineering systems, electric supply plays a major role in keep the systems running. More and more industries are installing their own power plants within the firm as it is more economical and it makes the manufacturing process more efficient. Our study deals with the study of power plant installed at Bunge Pvt. Ltd., Rajpura (Punjab), India. The study is based on the real data provided by the system. The literature of reliability holds numerous studies regarding standby systems, identical units, dissimilar units, etc. under different circumstances. Researchers [1-7] have contributed much by studying reliability and various parameters of the industrial systems. Singh and Saini [5] discussed the computational analysis of parameters affecting economy of one gas and one steam turbine system with scheduled inspection. In it, they have developed a model considering variation in demand and power production capacity for a system comprising one gas and one stream turbine. But there is still lack of studies related reliability analysis of power plant engineering systems. Our aim is to fill this gap. The study involves the reliability and profit evaluation of a power plant system. The units of a power plant system taken into consideration in the present paper are: Turbine, Main Boiler (high pressure boiler), three low pressure boilers acting as redundant system for main boiler, three fans: PA (Primary Air) fan, FD (Force Draught fan) and ID (Induced Draft) fan. Whenever failure occurs in high pressure boiler, all three low pressure boilers start operating altogether as the capacity of all low pressure boilers to bring out work is equivalent to the work of main high pressure boiler. The whole system comes at halt under the following circumstances: i. Both turbine and boiler cannot fail simultaneously. ii. Any other fan cannot fail while occurrence of failure of one fan. iii. Any two cold standby low pressure boilers cannot fail simultaneously. If the failure occurs in any component of the turbine, the repairman repairs/replaces that component as per operation required for that component. There is a single technician available to do the desired job for complete system. Repair/Replacement is done on FCFS (First-cum-First-serve) basis. Earlier, the industry involved three low pressure boilers which were kept as one primary unit into the system. But with the advancement and time, one high pressure boiler was installed which acts as primary unit now and the older three low pressure boilers were made a cold standby unit. Our study is based on the present system. Various measures of system effectiveness such as MTSF (Mean time to system failure), Availability, Busy period of repairman, Profit etc have been computed using Semi Markov process and Regenerative point technique. Graphical interpretation has also been done with the interpretation for the analysis of the present model developed for the system.