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Efficiency Analysis of Hydro Turbine Used in Mini/Micro Hydel Plants: a Case Study of Gilgit-Baltistan

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Efficiency Analysis of Hydro Turbine Used in Mini/Micro Hydel Plants: a Case Study of Gilgit-Baltistan Proceedings of the International Conference on Renewable, Applied and New Energy Technologies ICRANET-2018, 19-22 November 2018, Air University, Islamabad, Pakistan ICRANET2018-180132 Efficiency Analysis of Hydro Turbine Used in Mini/Micro Hydel Plants: A Case Study of Gilgit-Baltistan. Muneeb Hussain Dr. Pervaiz Akhter Department of Energy Systems Engineering (ESE) Department of Energy Systems Engineering (ESE) US Pak Centre for Advanced Studies for Energy US Pak Centre for Advanced Studies for Energy (USPCASE), National University of Sciences & (USPCASE), National University of Sciences & Technology (NUST), Islamabad Technology (NUST), Islamabad [email protected] [email protected] Abstract 1. INTRODUCTION. Hydro power (HP) plants represent the most Electricity is an essential stimulator for socio environmentally friendly and cost-effective means of economic uplift of any developing country. Hydro rural electrification. In areas with mountainous power has become one of the most suitable topography, use of mini/micro hydel plants (MHPs) environmentally friendly and cost-effective means of are one of the recommended technology. This facility electrification in rural areas. Nowadays In developing can serve an isolated community by generating 100 countries, the agencies involved in rural power supply kW to 1 MW of electricity. In majority of the countries recommend use of Mini/Micro hydel plants (MHPs) as including Pakistan no proper attention is paid to the the most robust, efficient and reliable source of off post project evaluation. Performance evaluation of power generation [1]. The employment of MHPs has MHP turbines and control equipment are necessary for been recommended by many international achieving the most efficient and best results. More organizations such as United Nations Industrial than 278 hydro sites have been identified by Gilgit- Development and World Bank. The projects Baltistan Water & Power Department (GBPWD) and developers and implementers are following the different Non-Governmental Organizations (NGOs), standards laid down for setting up MHP installations currently 119 hydel plants are functional, producing [2]. 148.69 MW of electricity. Approximately 70 % of the region has been benefited with electricity obtained In Pakistan natural resources in the form of hydro from hydro power plants, the supply demand has been power is in excess, which can be utilized to produce affected by the seasonal variations. electricity. Hydropower is the best existing option as it is clean, sustainable and indigenous. About 60 Giga- The aim of this research is to evaluate the efficiency of watt (GW) hydro potential has been estimated to be already installed mini/micro hydel plants (MHPs) in available in the country. It is therefore imperious to put Gilgit Baltistan (GB). Through case studies of three all efforts towards expansion and development of (3) different sites, the efficiencies of hydro turbines are hydro power without further delay [3]. presented. The research framework in this paper is that the efficiency of the turbine is compared with According to Gilgit-Baltistan Public Works international standards. It is hoped that the discussion Department (GBPWD) hydro power on main and results presented at the end will be helpful in tributaries and Indus River are 40, 000 Mega-Watt future power generation. (MW) and on sub tributaries the hydro potential is approximately 1,200 MW. In the past several NGOs Keywords: Hydro power; Turbines, Efficiency; such as Aga Khan rural support Program (AKRSP) Electricity. and German Development Organization (GIZ) along with WAPDA and GBPWD have conducted surveys to identify hydro power potential sites. About 278 project sites have been identified; most of them are mini or micro hydel plants (MHPs) having range between 100 kW to 4 MW respectively. The district ICRANET2018 Page 37 Proceedings of the International Conference on Renewable, Applied and New Energy Technologies ICRANET-2018, 19-22 November 2018, Air University, Islamabad, Pakistan wise number of hydel plants and their installed 2. GILGIT-BALTISTAN (GB) & HYDRO capacities are shown in Figure 1. POTENTIAL. Gilgit Baltistan (GB) is the situated in between the 50 43.6 world highest mountain ranges of the Himalayas, 45 Hydel plants W) Karakorum and Hindukush in the Northern side of M 40 ( 35 Capacity (MW) Pakistan. The region is divided into three (3) main 30 26.92 divisions (Gilgit, Baltistan and Diamer divisions) and Capacity , 24 ten (10) districts respectively. Gilgit Baltistan is 25 21 ants l spread over an area of 72496 sq.km which includes P 20 17 l e 13 11.75 about 27% glaciers, the biggest in the world outside 15 11 1111.46 11.08 Hyd 9.55 8 polar region. Its population is 1.4 million as per of 10 7 7 7 4.82 5.4 3.08 4.03 estimates of 2017 National Census of Pakistan. No. 5 0 Fig 1 :District Wise Hydel Plants and Capacity in MW (data source: GBPWD) MHPs Schemes can be used to harness electrical energy for home lightning, industrial and other purposes [4]. Using MHPs with efficient design, especially the turbines, can be perfect solution to overcome the economical and operational problems [1, 5]. Although energy from MHPs are thought as clean and cheap, many of the developing countries that need rural electrification are exposed to economic issues when installing costly hydro equipments [6]. Currently in Gilgit-Baltistan (GB) almost 100 hydel plants are functional, of them, small plants are 22 in numbers with installed capacity of 103.75 MW, 43 of these plants are of mini type having installed capacity of 35.8 MW and 46 micro hydel plants with installed capacity of 8.71 MW shown in the Figure 2. 103.75 Number of installed HP Fig 3: ARCGIS Map of Gilgit-Baltistan (GB) with Capacity in MW District Wise Mini/Micro Hydel Plants (MHPs). The region has bestowed with enormous hydro power 43 46 potential, which if carefully exploited can ensure 35.8 future energy security on long term basis. In Gilgit 22 Baltistan the supply of electricity started in 1960s 8.71 when few micro hydel power stations were developed in the area (Hydro Power and Renewable Policy for GB by GBPWD). This enormous hydro power Small Mini Micro potential can be exploited to develop mega, small and Fig 2: Hydel Plants categories and Installed Capacity micro hydel stations in GB to meet the energy in GB (data source: GBPWD/GIZ). requirement. Figure 4 shows year wise generation of electricity from hydropower during the years 1960- 2017. ICRANET2018 Page 38 Proceedings of the International Conference on Renewable, Applied and New Energy Technologies ICRANET-2018, 19-22 November 2018, Air University, Islamabad, Pakistan 140 127.19 120 ) 100 W 79.76 (M 80 y t 60 48.13 aci 42.01 p a 40 31.47 C 11.5 20 7.11 0.4 0.4 0.4 0.77 2.87 0 Fig 4: Year Wise Power Generation in GB from 1960-2017 (data source: GBPWD / AKRSP). 3. ELECTRICITY SITUATION. Gilgit Baltistan (GB) is not connected to National Grid because of geographically scattered population and difficult physical infrastructure, the region is lagging Fig 6: Demand and Supply in Winter Season. as compared to the rest of the country in terms of energy generation. Currently GB Water and Power There are some areas in GB like Haramosh, Bagrote, Department (GBPWD) is the main institution and Kharmang, Darel, Tangir and Thore with no load organization with limited manpower and resources for shedding in both summers and winters. Table 1 show energy related functions and services. The energy the current load shedding situation in three main availability varies with seasonal variations, in winters divisions of Gilgit Baltistan (GB). the load shedding last long for many hours especially in main cities of all three (3) divisions (Gilgit city and Table 1: Current Load Shedding Schedule of GB surroundings, Skardu city and Chilas city). In summer (data source: GBPWD) the demand supply gap reduces because of excess availability of water on the hydel plants sites and the Division Summer Winter region face minimum load shedding. On Off Hours Hours Figure 5 and Figure 6 illustrates winter and summer situations of electricity availability in Gilgit Baltistan 1. GILGIT (GB). City & 6 hours 05 Hours 19 Hours Surroundings off daily Juglote Sai 2 hours 12 Hours 12 Hours off daily Haramosh & No No No Bagrote shedding shedding Shedding 2. SKARDU Kharmang No No No shedding Shedding Shedding Skardu city 2 hours 04 Hours 20 Hours off daily Shiger No No No Shedding Shedding Shedding Fig 5: Demand and Supply in Summer Season. ICRANET2018 Page 39 Proceedings of the International Conference on Renewable, Applied and New Energy Technologies ICRANET-2018, 19-22 November 2018, Air University, Islamabad, Pakistan Roundu No No No Shedding Shedding Shedding 3. DIAMER Bunner Area No 16 Hours 08 Hours shedding Chilas City 6 hours 12 Hours 12 Hours & off daily Surroundings Darel No No No Shedding Shedding Shedding Tangir No No No Fig 7: Part Flow Efficiencies [9, 8]. shedding shedding Shedding 4.1 Calculation of Flow rate (Q), Effective Thore No No No Shedding Shedding Shedding head and Power (P). To obtain high accuracy of the measurement, proper selection of device range is very important. For 4. METHODLOGY. calculation of Flow rate, Effective head and power the Electro mechanical devices used are [10]. The methodology adopted in this paper is to calculate and plot the efficiencies of these mini/micro hydel 1- Differential Pressure devices /Pressure time plants (MHPs) and compared it with the standard plot. method to calculate flow rate. For a hydro power plant, the general formula for 2- Electronic Transducers for measurement of efficiency (ȵ ) calculation is [7]. effective head. 3- Power meter for calculation of turbine shaft P(Mechanical power Produced at Turbine shaft) power. ȵ = (1) ρgQH where ȵ is the turbine efficiency, P is mechanical For three sites (Sumayar, Chamugar & Kamri) the power produced at the turbine shaft (watts), ρ is the parameters are shown in the tables below.
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