JNTU
JNTU B.Tech III RENEWABLE ENERGY SOURCES Previous Question Paper (March - 2024 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Distinguish between the term irradiance and irradiation.
Answer
Irradiance is the instantaneous solar power incident on a unit surface area, measured in Watts per square meter (W/m²). Irradiation is the total amount of solar energy incident on a unit surface area over a specific period, measured in Joules per square meter (J/m²) or Watt-hours per square meter (Wh/m²).
Explain the variation of Wind speed with consideration of height from the ground.
Answer
Wind speed generally increases with height from the ground due to the reduction of surface friction and obstacles. This relationship is typically modeled using the power law equation:
Where V is the wind speed at height H, V₀ is the known speed at reference height H₀, and n is the surface roughness coefficient (Hellman exponent), which varies based on the terrain type.
What do you understand by solar thermal Energy?
Answer
Sign in to view the complete answer paper.
List the factors responsible for distribution of wind energy on the surface of the earth?
Answer
Sign in to view the complete answer paper.
List the various Biomass Resources.
Answer
Sign in to view the complete answer paper.
Enumerate the different types of Concentrating Solar collectors.
Answer
Sign in to view the complete answer paper.
List the difficulties in tidal power developments.
Answer
Sign in to view the complete answer paper.
What do you understand by Valence band, Conduction band and Forbidden band with respect to a semiconductor?
Answer
Sign in to view the complete answer paper.
List the advantages of Small hydro power plant.
Answer
Sign in to view the complete answer paper.
Explain the equivalent circuit of a Solar cell.
Answer
Sign in to view the complete answer paper.
Part B
Explain the following terms used in Solar radiation analysis: i) Hour angle ii) Solar azimuth angle iii) Declination angle
Answer
Sign in to view the complete answer paper.
Explain the terms extraterrestrial radiation and terrestrial radiation with respect to solar radiation.
Answer
Sign in to view the complete answer paper.
Explain in detail about the Beam radiation and diffuse radiation.
Answer
Sign in to view the complete answer paper.
Determine the Local Apparent Time corresponding to 1500 h (IST) Mumbai (190 07’, 750 51 E) on 1 July. In India, IST is based on 82.500 E. On 1 July, equation of time correction is equal to – 4.
Answer
Sign in to view the complete answer paper.
What do you understand by Solar radiation data? What is the need of solar radiation data?
Answer
Sign in to view the complete answer paper.
Calculate the number of day light hours in Srinagar for 1 January and 1 July. Take latitude of Srinagar as 340 05’ N.
Answer
Sign in to view the complete answer paper.
Define Solar constant. What are the reasons for variation in solar radiation reaching the earth and that received outside the earth atmosphere?
Answer
Sign in to view the complete answer paper.
Calculate the i) Zenith angle and ii) Solar azimuth angle for a place with latitude 430 at 9.30 AM solar time on Feb 13.
Answer
Sign in to view the complete answer paper.
Explain in detail about the Flat plate Collectors and give its advantages and disadvantages.
Answer
Sign in to view the complete answer paper.
Draw the schematic diagram for Solar Pond based electric plant along with its working.
Answer
Sign in to view the complete answer paper.
Compare between the concentrating collector over Flat collector.
Answer
Sign in to view the complete answer paper.
Explain the working of Solar Water heater with component-based diagram.
Answer
Sign in to view the complete answer paper.
Explain the significance of following factors in Flat Plate collectors: i) Fin efficacy factor ii) Collector heat removal factor.
Answer
Sign in to view the complete answer paper.
Explain the working of a Solar furnace with the help of a neat sketch.
Answer
Sign in to view the complete answer paper.
Explain the different factors that affect the performance of a Flat plate collector.
Answer
Sign in to view the complete answer paper.
A cylindrical parabolic concentrator is 9 m long and 2 m wide. The diameter of absorber tube is 10 cm. Find the concentration ratio.
Answer
Sign in to view the complete answer paper.
Derive an expression for efficiency and power produce by PV cell. Explain the various factors that affect the performance of cell.
Answer
Sign in to view the complete answer paper.
Explain the significance of Perturb and Observe MPPT method and how it can realize.
Answer
Sign in to view the complete answer paper.
Explain the effect of radiation intensity and temperature on the short circuit current, open circuit voltage and power generated by PV cell.
Answer
Sign in to view the complete answer paper.
Explain with a neat algorithm of Hill climbing MPPT Technique and give its merits.
Answer
Sign in to view the complete answer paper.