practical test 20210218 final

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SOLAR AND BIOMASS POWER GENERATION AY 2020-21 18th February 2021 Prof. Giampaolo Manzolini Time: 90 minutes Instructions for the examination: 1) Clearly indicate your surname and name on all the sheets you will deliver. 2) The score refers to exercises done in a comprehensive manner with exact numerical results. Numerical results correct but not accompanied by expla- nations will not be taken into account. The final score can be normalized according to the average results. 3) Answer briefly and clearly only to the asked questions. Calculations and explanations which do not respond to the questions will not be considered for evaluation even if correct. 4) Talking with colleagues and / or cheating will cause the cancellation of the exam. 5) All the needed data for the resolution of exercises lies on this paper. It is NOT ALLOWED to use material other than this (e.g. books, clipboard etc.). 6) Not all the provided inputs are necessary for the problem solving PV exercise (16 points) Question A: Design a PV plant to be placed on an industrial roof. The roof sizes are 90 m length and 50 m width with the longest length in the N/S direction. Assuming the PV module and inverter characteristics, determine the nominal power installed (AC), the num- ber of inverters and the PV connections discussing the results (it’s not necessary to check the conditions at minimum and maximum temperature). The PV modules are 30° tilted, their distance is determined so to have no shading on the 1st of December at solar noon assuming the plant to be located in Amsterdam (52.4 N, 4.9 E) (6 points). PV modules Inverter Power @STC 333 W Power input in CC 55000 W Open circiut voltage @STC 64.8 V Maximum voltage 900V Short circuit current @STC 6.24 A Power point operating voltage 360-700 V Voltage at…