<![CDATA[he utilization of water energy to generate electrical energy is carried out using a technology called Hydroelectric Power Plant (PLTA). Hydroelectric power plant simulation tools that use software are indeed practical, where students immediately get data and graphs of test results, however, as a result, students do not understand the measuring tools at all. And do not know how to measure data obtained in practicum. The hydroelectric system simulation tool located in the mechanical engineering laboratory of Mercu Buana University experienced trouble with the software so it could not be used. An analysis will be carried out on the hydroelectric simulation tool that will be modified. Therefore, the simulation tool needs to be modified, the modification is done using the VDI 2221 method. Modification of the hydroelectric system simulation tool with the VDI 2221 method so that it can display water discharge, turbine RPM, regulate turbine torque, generator output voltage and amperage. Based on the design results using the VDI 2221 method, 5 variant combinations were produced. Where the design variant 5 best meets the criteria and parameters that suit the needs of the hydroelectric system simulation tool, with an OWV value of 7.76 greater than other variant combinations. This OWV value is an ideal solution that suits the needs. Data processing from the test resulted in a pump brake horsepower of 946 watts, a pump water horsepower of 407.7 watts, a turbine power of 243.99 watts, and a generator output power of 175.2 watts.]]>
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