Formulation of Electromechanical Cost Estimation Nomogram for Small Hydropower Project in Nepal
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I.O.E. Pulchowk Campus
Abstract
Power generation from flowing water is known as Hydropower generation. It is one of
the major capital-intensive projects that require detailed technical as well as financial
analysis before making an investment decision. The cost of Electro-Mechanical (EM)
equipment including turbines, generators, controls autonomous and auxiliaries hold the
remarkable portion of the hydropower project budget. The cost of the EM equipment
is mainly related to the installed capacity and net head of hydropower. This research
aims to develop the mathematical relation as well as the cost estimation nomogram to
estimate the unit cost (per kW) of EM equipment accounting for the installed capacity
of the hydropower plant and available water head. Technical and Financial Details of
eighteen hydropower projects with either Pelton or Francis type turbine units were
collected and analyzed for the actual unit cost by multivariate linear regression method.
Obtained mathematical relationships were then compared against the primary data of
actual costs. The developed relations show that the MAPE (Mean Absolute Percentage
Error), Standard Deviation (SD), and adjusted R2 for Pelton and Francis-based
hydropower yields 5.81%, 6.9%, 75.89% and 8.12%, 10.2%, 80.93% respectively.
From the value of MAPE obtained, it can be inferred that the modeled equation
provides an excellent accurate estimation. A cost estimation nomogram for the range
of 50m to 800m net head for Pelton and 30m to 300m for Francis-based hydropower
Description
Power generation from flowing water is known as Hydropower generation. It is one of
the major capital-intensive projects that require detailed technical as well as financial
analysis before making an investment decision.