Question

A micro hydro system is to be designed to supply a 1 phase, 220 V, 50 Hz electrical distribution system having a predicted demand of 5 kW at 0.8 p.f. lagging. An ELC governor and AVR are used to regulate the output. Calculate the required VA rating of the generator. A water cooled ballast comprising ordinary kettle element rated at 230 V, 1 kW is to be used. The temperatures of water entering and leaving the ballast tank are 25 C and 50 °C respectively. Calculate the required flow of water in the ballast tank. Assume specific heat of water as 4200 J/ kg ko