JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV RENEWABLE ENERGY SOURCES Previous Question Paper (July - 2021 - R16)
Answer any five questions. All questions carry equal marks.
Main
A Hyderabad based MNC wants to setup a Power Plant in a rural area around 100 km north to Hyderabad, What kind of power plant would be good? Using SWAT or similar analysis recommend them what kind of power plant they should prefer.
Answer
For a rural location 100 km north of Hyderabad, the most viable and sustainable power generation solution is a Solar Photovoltaic (PV) Power Plant, potentially integrated with a small-scale Biomass gasification unit to ensure base-load reliability. The region experiences high solar insolation typical of the Telangana plateau, making solar energy the most abundant and accessible resource.
A SWOT Analysis (Strengths, Weaknesses, Opportunities, Threats) is provided below to justify this recommendation:
| Strengths | Weaknesses |
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| Opportunities | Threats |
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Recommendation Rationale:
- Resource Availability: The geographical location north of Hyderabad receives consistent sunlight throughout the year, minimizing the risk of fuel supply chain disruptions associated with coal or biomass-only plants.
- Economic Viability: Given the rural setting, a decentralized Solar-Biomass Hybrid system is recommended. The biomass component can utilize agricultural waste (common in rural Telangana) to provide power during non-sunny hours, ensuring a more stable supply than standalone solar.
- Sustainability: Solar energy aligns with national carbon reduction targets and minimizes the environmental footprint in a rural ecosystem, avoiding the water consumption and pollution issues associated with conventional thermal power plants.
Differentiate between:
Answer
- Primary Sources are energy forms that occur naturally and have not undergone any conversion process. They are extracted directly from nature. Examples include coal, crude oil, natural gas, solar radiation, wind energy, and biomass.
- Secondary Sources are energy forms derived from the transformation or conversion of primary sources. They are often referred to as energy carriers because they are more convenient for transmission and end-use. Examples include electricity generated from coal or wind, hydrogen produced via electrolysis, and gasoline refined from crude oil.
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Calculate the angle made by the beam of radiation with the normal to the flat collector on June 1 at 11.00AM solar time for the location latitude 16°98'N. The collector is tilted at angle of latitude plus 15° with horizontal and it is pointing due south.
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Consider a Propeller type wind turbine of 120 m with an operating speed of 40 r.p.m. at its maximum efficiency. Calculate:
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The following data are given for a family biogas digester suitable for the output of 8 cows, the retention time is 15 days, temperature is 35°C, the dry matter consumed per day is 2.5 Kg and the biogas yield is 0.28 m³/Kg. The efficiency of the burner is 65% and methane proportion is 0.7, and the heat combustion of methane is 28MJ/m³. Calculate the volume of the biogas digester and the power availability from the digester.
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Discuss about the anaerobic digestion and the factors helping the anaerobic digestion with the factors affecting the anaerobic digestion. Name the various models of biogas plant.
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A hot water geothermal power plant received waters at 250°C, the pressure at turbine inlet is 11.5 kg/cm². The plant uses a direct contact condenser that operates at 0.35 kg/cm². The turbine has a polytropic efficiency of 0.7. For a cycle output of 15 MW calculate:
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Describe the Closed cycle OTEC system with its advantages over Open cycle OTEC system.
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