Suppose you are the consulting engineer of a project in which you have been asked to design a PV plant for a small college in LAS Vegas, NV to supply almest 10% of its demand. Refer to the Solar Insolation Table of this city. The total anmal demand of the college is 70,000 kWh/yr. LAS VNV Ta Mar Apr May Je Latitude 360N July Aug Sept Oct Nov Dec Year L-15 La La+15 1-Atis (La) 44 53 53 59 67 56 61 66 50 51 47 62 73 25 78 74 73 68 6.5 39 30 74 65 34 102 106 77 75 7.1 6.1 48 42 23 12 9 62 26 26 111 04 10.3 72 66 55 49 70 68 65 59 54 45 53 52 50 42 93 86 67 59 Temp (C 141 174 204 253 310 379 411 396 348 278 197 142 36.9 (0.5 point) a. What is the annual energy (kWh/yr) to be met by your PV system design? (2 points) b. Use the single-axis tracker (ie., 1-Axis (Lat)) for your design. Assume the de-to-ac efficiency factor is 0.75. Start your design by calculating the total required P (kW). From the following three tables, indicate the manufacturer and the model of the PV module (select the one with the highest efficiency) and the inverter you plan to order for your design (Hint: The first table is associated with your PV modules. The last two tables present the available inverters. Make sure the rated power of your selected inverter is not less than the calculated Pa or is not considerably greater than Pa. If you are using the third table to select your inverter, assume the power factor (PF) of 0.75 to find the associated KVA as the model of the inverter. As you know, KVA multiplied by PF is equal to kW) 125 W 260 V Module Material Rated power Paste Voltage at max power Sharp Куосега NE-K125U2 KC158G Shell SP150 Poly Crystal Multicrystal Monocrystal 158 W 150 W 232 V 34 V Current at mas power 4.30 A 6.82 A 4.40 A Open-circuit voltage Voc Short-circuit current Isc Length 32.3 V 289 V 414 V 5.46 A 7.58 A 48 A 1.190m 1.290 m 1.619 m 0792 m 0.990 m 0814 m Efficiency 13.3% 12.4% 11.4% Manufacturer Xantrex Xant Xantes Model STXR1500 STXR2500 AC power 1500 W 2500 W 10,000 W 583000 2000 W PV 10 Sunny Boy Sunay Boy 582500 2500 W AC voltage 211-364 V 211-364 V 208 V, 36 198-251 V 198-251 V PV V voltage range 44-85 V 44-85 V 330-600 V 125-500 V 250-550 V MPPT Max input voltage: 120 V 120 V 600 V 500 V 600 V 31.9 A 10 A 11 A Maximum efficiency 92% 94% 959 96% 94% Manufacturer: Giant Power 2KVA 48V Plus 1KVA 24V INVERTER MODEL 2KVA 24V 1KVA 48V 3KVA 48V 2KVA 24V Plus 3KVA 24V Plus 3KVA 48V Plus 4KVA 3KVA 24V SKVA 600W 3000W Rated Power 900W 1500W Efficiency 98.0% max. Max. PV Array Open Circuit Voltage 75Vdc max 102Vdc max 145Vdc PV Array MPPT Voltage Range 30-66Vdc 60-88Vdc 30-115Vdc Min battery voltage for PV charge Standby Power Consumption Battery Voltage Accuracy 17Vdc 34Vdc 17Vdc 60-115Vdc 34Vdc 2W +/-0.3% PV Voltage Accuracy +1-2V Charging Algorithm 3-Step (2 points) c. Indicate the number of PV modules you should order. (2 points) d. Indicate the array configuration for your design. (Hint: how many strings? How many modules in each string?) (1 point) e. Verify that the total voltage of your PV array design properly falls into the MPPT voltage range of your selected inverter.