This document contains exam questions related to renewable energy topics. Question 1 involves estimating the power generated by a small hydropower system and calculating the electric energy generated in a month. It also asks about the three types of turbines and finding the optimum tilt angle for solar panels in Tucson on a given date. Question 2 asks about designing a stand-alone photovoltaic (PV) system and the types of inverters used in grid-connected PV systems. It also involves battery calculations related to depth of discharge. Question 3 defines a hydropower plant, classifies hydropower plants, and lists requirements for obtaining a river for hydropower. It asks about three methods for measuring water flow

1. Question 1
a. Power from a Small Source. Suppose 150 gpm of water is taken from a creek and
delivered through 1000 ft of 3-in.-diameter polyethylene pipe to a turbine 100 ft
lower than the source. Use the rule-of-thumb to estimate the power delivered by the
turbine/generator. In a 30-day month, how much electric energy would be generated?
I. Find the friction loss 3 mark
II.Find the net head available 3 mark
III.Find the electrical power delivered 3 mark
b. Explain the three types of turbine 5 mark
c. Find the optimum tilt angle for south-facing photovoltaic module in Tucson (Latitude
32.1°) at solar noon on March 17.
I.Find the solar declination 3 mark
II.Find the altitude angle 3 mark
III.Find The tilt angle 3 mark
Question 2
a. Explain the steps to be taken in order to design a STAND ALONE PV SYSTEM
4 mark
b. Mention how many types of inverter there is when we design of grid-connected pv
system 4 mark
c. Using the battery connection diagram, calculate the time of battery bank to supply 2
A loads if the batteries have
I. Find the 18% DOD 3 mark
II. Find the 23% DOD 3 mark
Student’s Name:________________________________________________ ____________ ID: ___________
Faculty: Engineering
Department:
Year: 3st
Class: _________
Lecturer: Eng Munasar Abdirahman Ali
Subject: Renewable Energy
Exam: three Hours
Date: ____/____2021
Hormuud University
Final exam
Academic Year
2021-2021

2. III. Find the 75% DOD 3 mark
d. explain the steps to be taken in when it comes to design grid connected pv system
4 mark
Question 3
a. define what is hypro power plant 4 mark
b. explain the classification of hypro power plant 4 mark
c. what are the requirement survey in order to obtain the river as hydro power plant
3 mark
d. explain the three method of water flow measurement 5 mark