a review - Acta Technica Corviniensis

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The plant capacity factor is the ratio of the average power production to the installed capacity and this is Q practically taken as ay = 92 = 0. 597 Q15 154 A plant capacity factor of 0.6 is common for storage type power schemes (Ram, 1989). CONCLUSIONS Locating a good site for installation of a new plant is one of the main obstacles for small hydroelectric power generation. The site where the small hydropower is installed must have sufficient head and enough water flow rate to produce sufficient amount of energy and the site must also be close to the location where the energy is going to be utilized. Flow rate is very essential for hydropower generation since the head at a proposed site is practically constant while the available flow is highly variable. Having known the water discharge, annual energy output of the proposed site under consideration can be estimated which will serve as an input energy to run hydro turbine of the SHP scheme to generate electricity. Since the entire quantity available at a site is utilized in power production, the study of water demand for hydropower amount to collection of stream flow data and their analysis. Therefore, stream flow is an important parameter in determining the maximum power derivable from any flowing river. RECOMMENDATION Exploring the potential of SHP scheme as eco-friendly source of energy serves the least cost option for provision of electricity to underdeveloped rural areas compared to the extension of grid. They are affordable if necessary subsidy is provided. Furthermore, the value added benefits of the scheme is as follow: Availability of local labour and materials; thereby, increasing the income of the poor. They help to check rural/urban immigration. They are flexible and can usefully be integrated into almost any kind of development programme such as rural development, poverty alleviation programme and environment protection programmes. REFERENCES [1.] Gundiri M.N (2005), Guidelines for the design of hydraulic structures for small hydropower schemes, paper presented at national workshop on capacity building in small hydropower for the provision of rural energy, pp. 1–8, Ogun-Osun River Basin Development Authority, Nigeria. [2.] Nigam P.S (1085), Hand Book of Hydro Electric Engineering, Second edition. [3.] Nwachukwu M.C (2005), Hydrological data collection and analysis for small hydropower development, national workshop on capacity building in small hydropower for the provision of rural energy, pp. 1–20, Ogun- Osun River Basin Development Authority, Nigeria. ACTA TECHNICA CORVINIENSIS – Bulletin of Engineering [4.] Odesanya M.O (2005), Social impact assessment and its mitigation in SHP projects, national workshop on capacity building in small hydropower for the provision of rural energy, pp. 1 – 2, Ogun-Osun River Basin Development Authority, Nigeria. [5.] Ram S. Gupta (1989), Hydrological and Hydraulic Systems Practice. Wall Inc. [6.] Tamunotonye Brown (2005), Determining Potential Capacity of Small Hydropower Site, pp. 2 – 5, Ogun-Osun River Basin Development Authority, Nigeria. [7.] US Bureau of Reclamations (1987), Design of small Dams, WR <strong>Technica</strong>l Publ. 2 nd edition. [8.] Weedy B.M (1979), Electric Power Systems, third edition. Chichester New York: John Willy & Son. [9.] Yanmaz A.M (2001), Applied Water Resources Engineering, Ankara, Ghana: METU Press ACTA TECHNICA CORVINIENSIS – BULLETIN of ENGINEERING ISSN: 2067-3809 [CD-Rom, online] copyright © UNIVERSITY POLITEHNICA TIMISOARA, FACULTY OF ENGINEERING HUNEDOARA, 5, REVOLUTIEI, 331128, HUNEDOARA, ROMANIA http://acta.fih.upt.ro 120 2013. Fascicule 2 [April–June]
1. Cristina HORA, 2. Simona DZIŢAC, 3. Călin SECUI, 4. Gabriel BENDEA RELIABILITY ANALYSIS OF SPHERICAL VALVE (VS) FROM HPP REMEŢI USING MONTE CARLO SIMULATION 1-4. UNIVERSITY OF ORADEA, FACULTY OF POWER ENGINEERING AND INDUSTRIAL MANAGEMENT, 1, UNIVERSITĂŢII, ORADEA, ROMANIA ABSTRACT: In every hydro energetic arrangement, the water approaches, in differently construction elements and trough them, are equipped with valves. These valves assure the normal functioning of equipments, respectively there operatively insulation in case of failures or repairs. Also, the reliability level of hydro mechanical equipments can have a major impact on the operational reliability of HPP (Hydro Power Plants). In consequence, there are justified the concerns regarding the predictive reliability of them. In this paper, these studies of hydro-mechanical equipments reliability are made using the Monte Carlo simulation. KEYWORDS: reliability, hydro mechanical equipment, Monte Carlo simulation INTRODUCTION In every hydro energetic arrangement, the water approaches, in differently construction elements and trough them, are equipped with valves. These valves assure the normal functioning of equipments, respectively there operatively insulation in case of failures or repairs. The accomplished studies [4, 5], indicate that some valves type are more performing under the reliability aspects than other equipments (hydraulic turbines). In succession, on the reliability studies, the valves are treated as bivalent elements (Functioning; Faulting). The reliability analysis of hydro mechanical equipments it has been made using the Monte Carlo simulation [2, 6, 7]. RELIABILITY ANALYSIS OF SPHERICAL VALVE (VS) FROM HPP REMEŢI USING SIMULATION PROGRAM The spherical valve equipment, SV 150-500, is a complex ensemble who attended the hydraulic turbine FVM 52-320. It is located upstream of turbine and downstream of distributor. The spherical valve performed one’s functions namely, the safety device for turbine. The valve control its automatic realize, in the hydro generator on-off process. During a several distinctly operations the spherical valve it has manual control, from the local panel. During the reliability analyses, the spherical valve (SV) from HPP Remeti, it has been regarded like a system compound of following subsystems (figure 1): The closing subsystem (CSS); The sealing subsystem (SSS); The control subsystem (NSS); The operate subsystem (OSS); The protection subsystem (PSS). Figure 1. The spherical valve subsystems According to previously specifications (for the simplified reliability analyses) SV it has been treated as a system compound of five subsystems. In consequence, it can represent the simplified equivalent diagram, who reflects the necessity that, all the subsystems to be in work for satisfied all the spherical valve functions. Figure 2. The equivalent diagram of SV Depend on results obtained from the operational reliability studies [4,5], it can estimate the subsystems reliability indicators [R i , Fi, µ i , M i ]. © copyright FACULTY of ENGINEERING ‐ HUNEDOARA, ROMANIA 121
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