I N V E N T O R Y S T U D Y O N D E V E L O P M E N T P O T E N T I A L F O R R U R A L E L E C T R I F I C A T I O N I N I N D O N E S I A B E T E N G S u l a w e s i S e l a t a n Bandung, September 18, 2001 Inventory Study on Development Potential For Rural electrification in INDONESIA 1 S I T E R E P O R T Beteng - Talu Wanua N 1. GENERAL INFORMATION Province : Sulawesi Selatan BETENG Regency : Luwu District : TaluWanua MAKALE Village : Batang PARE Site / Sub-village : Beteng PARE River : Tandung WATAMPONE Gross Head : 7 m MAKASSAR Estimate Design Discharge : 500 l/s Hydraulic Potential Power : 34.34 kW SULAWESI ISLAND Estimate Electrical Power : 16.56 kW 2. SITE DESCRIPTION 2.1. Location tation (buses, rented cars) which services Beteng sub-village is one of the potential site route among Palopo-Talu Wanua- Batang. for a Micro Hydropower (MHP) implementation. From Batang village, the MHP scheme Beteng sub-village is part of Batang village, Talu location (power house) could be reached in Wanua district, Luwu regency, Sulawesi Selatan 615 minutes (for more detail, see Table 1.) province. It is located geographically at S0200 57'13.3”and E 120 8'13.4”. Batang village 2.3. Topographic and Geological Condition north border is Walenrang village, Wara district at The MHP scheme will uses water from the southern side, Tana Toraja regency at the Tandung river. The river located on the west western side and Wara district at the eastern side. of Beteng sub-village. From the MHP scheme Table 1. Route of Access Line Route Distance Duration Available Layer (road) Transportation Type Palopo - Talu Wanua 5km 15 minutes Bus, rented car Asphalt Talu Wanua - Batang 4 km 10 minutes Bus, rented car Asphalt Batang - MHP scheme location (Beteng)6 km 15 minutes Bus, rented car Asphalt 2.2. Accessibility location (power house) the river goes to the Beteng sub-village located about 15 km to the north direction. Topographic conditions along north of Palopo, Luwu regency, Sulawesi Selatan the river are moderate slope. And the Province. The location could be reach by four materials around the river are gravel and wheel vehicle such Kijang or motorcycle in less loose soil. Topographic map of the than 1 hour from Palopo, or by a public transpor - catchment area is shown in Annex 3. Inventory Study on Development Potential For Rural electrification in INDONESIA 2 S I T E R E P O R T 3. SOCIO - ECONOMIC CONDITION Village settlement in Batang village are spread, -tural potential in the area, Beteng sub village not concentrated. There is an adequate distance are quite prospective to develop further. between every small group from one to another. There are existing public facilities such as Almost the villagers are farmers. Their main elementary school, mosque, public health crops are coffee, and clove. They still cultivate center, and village government office. There their land in traditional way, without any modern are also community organizations such as agriculture know-how. According to the agricul - LKMD, Farmer groups, and religious groups. Table 2. Sub-Villages which will electrified by The MHP Scheme Sub-Village Village Number of Latitude Line Longitude Line Household Beteng Batang 132 S 0200 57'13.3” E 120 8'13.4” Total 132 4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION The villages around the MHP scheme has not been electrified and will not get electricity from PLN grid, at least in the recent PLN Plan. The nearest PLN electricity grid is about 7 km. Existing main energy sources for villagers there are kerosene, oil, and diesel fuel for lighting. The village around MHP scheme location economically have many potential, especially in agriculture, and horticulture sectors. However, related production facilities are still insufficient, there are some possibilities such as: storage facility, and coffee grinding. MHP development is expected giving valuable support to increase community economics quality apart from lighting need. As shown at Table 2, the number of households which will electrified by MHP scheme at Beteng sub-village are6 132 houses. Based on empiric data of electrification project using MHP, the estimate electricity need or electrical power need assumption is about 100 watt per house. Including the electricity need for several public Figure 1 facilities, then total MHP Capacity expected for Village Settlement at Beteng sub-village; A good Beteng is about 14.15 kW. condition of access road (Asphalt-layered). Inventory Study on Development Potential For Rural electrification in INDONESIA 3 S I T E R E P O R T Table 3. Estimate Energy Demand in The Catchment Area Item Amount Capacity per Unit Capacity Remark Households 132 100 W 13.2 kW - School 1 100 W 0.1 kW Elementary School Mosque 3 100 W 0.3 kW Public Health Center 1 100 W 0.1 kW - Village Government Office 1 100 W 0.1 kW Meeting Facility Public Facility (Street Lighting) - 0.35kW Total 14.15 kW 5. HYDRO-POWER POTENTIAL According to topographic measurement, water -teng sub-village is about 14.15 kW. To fulfil from Tandung River will be flowed through intake this requirement, the future MHP discharge then to headrace which the length is about 200 m have to be about 500 l/s with the estimate (see detailed site plan at Annex 4). For this MHP net head 6.5 m, with this calculation the MHP scheme, measured gross head is about 7 m and scheme could generate electricity power estimated penstock length is about 18 m. Detail about 16.56 kW and still have reserved power penstock profile is shown at Annex 5. about 2.41 kW (see detail calculation at Table Estimated minimum power electricity need in Be - 4.). Actual discharge measured of Tandung River is6 808 liter/second. Recorded discharge data or annual discharge are not available and discharge measurement done not in the driest month, therefore maximum discharge in the dry season estimated about 500 l/s. However, design discharge has to be determined in detail and more accurate, considering all factor, and catchment area when a further feasibility study for this MHP done. 6. TRANSMISSION LINE The village settlement surrounding the MHP scheme is spread and in small groups which have significant distance from each other. Main transmission line to those sub-villages, Figure 2 as shown in Table 2, is about 4 km length. The selected location for penstock route; an underbrush area The transmission line design of Beteng sub- in part of Beteng sub-village, TaluWanua village is shown in Annex 6. Inventory Study on Development Potential For Rural electrification in INDONESIA 4 S I T E R E P O R T Table 4. Estimate Power Capacity of The MHP Scheme I t e m Symbol Amount Estimate Gross Head Hg 7 m Measured Discharge ( when surveyed) Qm 808 l/s Design Discharge (max 60% from Qm ) Qd 500 l/s Hydraulic Power Potential Ph 34.34 kW Estimate Net Head Hnet 6.5 m h Estimate TurbineEfficiency T 0.7 h Estimate Generator Efficiency G 0.85 h Estimate mechanical transmission efficiency M 0.97 Estimate Electrical Power Generated at the power house Pel1 1 8.4 kW Estimate transmission Losses Ploss 1.84 kW Estimate Electrical Power delivered to the village Pel2 16.56 kW Expected MHP Capacity (refers to table 3) Pexp 14.15 kW Reserved Power (Pel2 - Pexp ) Pres 2.41 kW I. DEMOGRAPHIC & SOCIAL Item / Description Amount / Remarks Site / Sub-village Beteng River Tandung Village Batang District Talu Wanua Regency Luwu Province Sulawesi Selatan Distance to PLN Grid 7 km Number of Population - Number of Households 132 Means of Livelihood Trading, Farming Economic Potential (Local Commodity) Coffee, and Clove II. HYDRAULICAL CONDITION Item / Description Amount / Remarks Gross Head 7 m Estimate Design Discharge 500 l/s Hydraulic Potential Power 34.34 kW Estimate Electrical Power 16.56 kW III. C I V I L Item / Description Amount / Remarks Estimation of Weir & Intake Type of Weir Gabion Material Stone Masonry Width (of Weir) 8 m Type of Intake Side Intake Material Stone Masonry Estimation of Headrace (Channel) Type Open Channel Material Stone Masonry Length 200 m Estimation of Head Tank (Forebay) Material Concrete, Stone Masonry Estimation of Penstock Length 18 m Diameter 57 cm Material Welded (Rolled) Steel Estimation of Power House Material Brick Masonry IV. ELECTRO-MECHANICAL Item / Description Amount / Remarks Estimation of Turbine Type Crossflow Estimate Turbine Efficiency 0.7 Estimation of Mechanical Transmission Type Flat Belt Estimate Mechanical Transmission Efficiency 0.97 Estimation of Generator Type Synchronous Estimate Generator Efficiency 0.85 Estimation of Control System Type Electronic Load Controller Ballast Load Air Heater V. TRANSMISSION LINE Item / Description Amount / Remarks Estimation of Transmission Line Length 4 km Photograph 1 Nature of stream bed of of Tandung river; Beteng sub-village, Batang, TaluWanua Photograph 2 The selected location for Dam and Intake scheme; a gravelly area in part of Beteng sub-village. Photograph 3 The selected location for head tank (forebay) scheme; an underbrush area in part of Beteng sub-village Photograph 4 The selected location for Power House; Beteng sub-village, Talu Wanua. .