ES 17 06 2024 theoretical test

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POWER PRODUCTION FROM RENEWABLE ENERGY AY 2023-24 17th June 2024 Prof. Andrea Giostri Time: 1 hour NAME and SURNAME:.................................................................................................................................................. COURSE and CFU:......................................................................................................................................................... Instructions for the examination: 1) Clearly indicate your name on all the sheets you will deliver. 2) Give a synthetic and clear answer to as many questions as possible. The final score will be normalized according to the average results. 3) Talk with colleagues and / or cheating will cause the cancellation of the exam. OPEN QUESTIONS (points 18) 1. For All students: Express the energy of a photon as a function of the wavelength and plot its trend. Referring to this plot, discuss the theoretical limit for a single junction cell and discuss the choice of cell material. How this limit could be improved with a multi-junction cell? 2a. For Mechanical Engineering students and Management Engineering students (5CFU): Discuss the effect of a thermal storage system on the LCOE for a CSP plant. Consider also the impact of solar multiple on LCOE. 2b. For Energy Engineering students and Management Engineering students (8CFU): Consider having a geothermal well with liquid geothermal fluid at 130°C and 20 bar. Choose the best solution that, in your opinion, allow s producing electricity exploiting this resource . Draw the layout and discuss the main characteristics of the plant. MULTIPLE-CHOICE QUESTIONS (points 12) Answer to the following 15 questions. Select the box with correct answer (0.8 points if correct, -0.3 points if wrong). For a Horizontal Axis…