Question

5.4 A large mini-grid is expected to have a daily load of 980 kWh. Assume the energy is consumed at a constant rate throughout the day. Let the fuel cost be US$1.25/liter. Three options are being considered to serve the mini-grid: . five equally loaded 10 kW gen sets; . one 50 kW gen set; one 100 kW gen set. Compute the annual cost associated with each design. Refer to Table 5.2 for the fuel consumption for each gen set. Assume the fuel consumption varies linearly between the loading percentages given in Table 5.2. Table 5.2 Typical gen set fuel consumption Loading Capacity 25% 50% 75% 100% 1.3 2.5 3.54.3 10 4.9 8.7 12.5 16.4 50 15.9 22.3 27.6 100 8.3 39.7 73.8 89.7 118.1 500

Answer 1

5-4) daily Consumed wils98o K 8 D 2 ase 5 leading 어 X. 81'667% 75 between CxSumim en. Cem : one 5okw generato set 40.833 kw power in One dau Comcum vom chart ,'-8T667 % loading wiLe Consume us虫17.0137 5 . ust (13.611 치.25). .. . 'Totap Cost Caselli. : one 100 kw generah γ set % age load 40.83 3 у. 40 822 x 10o toodina Constumes 5.92*t in houv Consumes om chayh 50% Total cost(12-984X 25) U. 16-23