ES 08 07 2024 theoretical test

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POWER PRODUCTION FROM RENEWABLE ENERGY AY 2023-24 8th July 2024 Prof. Andrea Giostri Time: 1 hour NAME and SURNAME:.................................................................................................................................................. COURSE and CFU:............................................TYPE (Complete or Theory only):................................................. 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 Consider a modern wind turbine (large in installed capacity) and draw an ideal Power-wind speed curve highlighting and defining cut -in speed, rated speed and cut -off speed. Explain the control strategies that can be adopted between the nominal speed and the cut-off speed. U nderline the advantages in response to wind gusts. 2b. For Management engineering (5 CFU): Considering CSP technologies, explain and demonstrate the reason why concentration of solar energy is necessary to reach high conversion efficiency of solar energy to electricity. Summarize the ideal characteristics of a solar concentrator. 2c For Mechanical Engineering students and Management Engineering students (8 CFU) and Energy Engineering: Describe and discuss the characteristic of an anaerobic digestion plant. Draw the layout of a plant to generate both electricity and heat. 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). Consider a…