FOREBAY, PENSTOCK, POWER HOUSE, AND TAILRACE PLANNING IN CIROMPANG MINIHYDRO POWER PLANT, CIHIKEU, DISTRICT BUNGBULANG, GARUT REGENCY, WEST JAVA

• Main Author: ZAKIYAH (NIM : 15813028), ANNISA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21153
• Institution: Institut Teknologi Bandung

The needs of energy is increasing along with the development of human needs. One of energy which considered as society’s main needs is electricity. In Indonesia, there are a lot of villages which hasn’t had electricity, especially in the remote area. It happens because of the difficult access to reach the remote area, so the cost to install the electricity become expensive. Besides that, Indonesia has a biggest number 5th of water resources potential in the world. Because of that, with current technology, we should be able to develop this big potential of water resources so it could be optimally utilized. One of them is by the provision of water power to be converted to electrical energy by the construction of Minihydro Power Plant. <br /> <br /> <br /> This Final Report will explain the design plan of Minihydro Power Plant in Cihikeu, District Bungbulang, Garut Regency, West Java. First step of power plant planning is hydrology analysis to get the results of flood discharge and dependable flow based on rain and climate data processing. From the hydrology analysis, the result for dependable flow using NRECA method is 3,12 m3/s with 65% reliability, and flood discharge using SCS Method is 598 m3/s for return period of 100 years. By Minihydro Power Plant layout analysis which based on topographic data, the result for head is 151,956 m and by calculating the loss of energy in the whole hydraulic building which is 13 m, so the head netto is 138,956 m. Cirompang Minihydro Power Plant generating 3,615 MW power with 2 Francis turbine. <br /> <br /> <br /> And then the work continues to building dimension planning. The building dimension that calculated are forebay, penstock, turbine choosing on the powerhouse, and tailrace. By using all results of data processing which is done before, the building dimension for forebay is 6 m wide, 12 m long, and the height of the cross section is 6,4 m. While the dimension design for 2750 m longpenstock is 1,8 m diameter and 9 mm thick. And for the 88 m long tailrace, the dimension is 1,3 m wide and the height of the cross section is 1,2 m. <br /> <br /> <br /> Checking of soil bearing capacity stability is carried out for all buildings and the result is stating that all of the buildings is in the safe condition. In terms of cost, the construction cost of Cirompang Minihydro Power Plant is Rp 43,71 Billion, and the operational and maintenance cost is Rp 872,473 Million/year.