Mentors Comments:
- https://ourworldindata.org/fossil-fuels
- Amidst growing global fossil fuel consumption over the long-term and consequent scarcity it is essential for us to evaluate options of renewable resources and in this context Solar energy.
- The steady increase in energy consumption coupled with environmental pollution has promoted research activities in alternative and renewable energy fuels. Many countries in the world are continuously developing materials and methods for effectively utilizing the alternative fuel resources available in their region. Thus one must discuss the potential Solar energy has for us to overcome the energy shortages of present and future. Your discussion should focus on the availability of raw material required for the generation of Solar energy in India and in the world.
- Start with a brief highlight of the current energy consumption patterns across the world, the crisis World is facing.
- Discuss the following points in detail in the body of the answer:
- Explain how the world is gradually marching towards a severe energy crisis, with an ever-increasing demand of energy overstepping its supply and that the energy we use every day is not unlimited, yet we take it for granted.
- Discuss the causes of energy crisis
- Then move on to discuss the potential of Solar energy as a renewable source of fuels.
- Discuss the factors associated such as – availability of raw material required for the generation of Solar energy in India and in the world – Tropical nature of the country, technology – PV solar cells, capacity in terms of skills etc.
- Conclude with the inevitableness of exploring newer and renewable resources given the conditions of the present global energy crisis.
Answer:
Fossil fuels (coal, oil, gas) have, and continue to, play a dominant role in global energy systems. Fossil energy was a fundamental driver of the Industrial Revolution and the technological, social, economic and development progress which has followed. Energy has played a strongly positive role in global change.
India and fossil fuels:
- As Indian population continues to grow and the limited amount of fossil fuels begins to diminish, it may not be possible to provide the amount of energy demanded by the world by only using fossil fuels to convert energy.
- India’s current energy use is unsustainable.
- India has been dependent to a large extent on energy imports to meet its national energy requirements.
- India imports almost 80% of her oil needs, generates 60% of her electricity from coal-based thermal power plants.
- However, these being fossil fuels, they are dwindling at quick rates.
- The geo-political scenario is volatile leading to energy insecurity of India
- It is estimated that at current rates of production, oil will run out in 53 years, natural gas in 54 and coal in 110.
- Nearly 300 million people in rural India lack access to grid-connected power, promoting the use of archaic sources of energy such as kerosene, diesel, wood-fired chulhas, etc.
- It not only results in huge government subsidies, but also substantial health and environmental hazards.
Solar energy in India:
- National Solar Mission envisages establishing India as a global leader in solar energy.
- The Mission has set the ambitious target of deploying 100GW of grid-connected solar power by 2022. (40 GW Rooftop and 60 GW through Large and Medium Scale Grid Connected Solar Power Projects).
- The country’s solar installed capacity reached 21 GW as of 31 December 2018.
- India along with Paris, on the sidelines of UNFCCC’s CoP 21 at Paris (2015) decided to set up International Solar Alliance.
- The ISA’s major objectives include global deployment of over 1,000GW of solar generation capacity and mobilisation of investment of over US$ 1000 billion into solar energy by 2030.
Raw Material for Solar Energy in India and world:
- A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.
- The basic component of a solar cell is pure silicon, which is not pure in its natural state.
- Pure silicon is derived from such silicon dioxides as quartzite gravel (the purest silica) or crushed quartz.
- The resulting pure silicon is then doped (treated with) with phosphorous and boron to produce an excess of electrons and a deficiency of electrons respectively to make a semiconductor capable of conducting electricity.
- The silicon disks are shiny and require an anti-reflective coating, usually titanium dioxide.
- copper, silver, silicon, indium, etc. are also vital to produce existing and future solar technologies.
- As domestic manufacturing of solar cells and panels was limited, the country is dependent on imports from China and other countries, including Germany.
Distribution of raw materials in India and the world:
- The silicon that you’ll now find in a solar cell is highly processed. The material is sourced in silica mines, which are often found in regions with heavy quartz concentrations.
- Silicon is not produced in India, we are totally import-dependent for it. Though we have plenty of sand as raw material, we don’t have the technology to process it into silicon wafers for solar cells or panels
- Quartz reserves in India are found in Rajasthan, Behror, Haryana, Himachal Pradesh, Andhra Pradesh, and Madhya Pradesh. Deposits in Rajasthan are spread over the districts of Alwar, Ajmer, Bharatpur, Tonk, Sawai Madhopur, Pali, Udaipur, Churu, and Chittorgarh.
- Rare earth minerals in India mainly exist in the form of monazite and monazite distributed in coastal placers and inland placers.
- China is by far the world’s largest producer of silicon, including thereby silicon content for ferrosilicon and silicon metal.
- Globally, more than 90% of the rare earth metals are located in China.
India although has more than 300 days of sunny weather and the technology to manufacture PV cells to harness solar energy, we lack raw materials. Thus, it is imperative to sign bilateral treaties with countries which have the raw materials to push our solar industries and achieve our target of 100 GW of solar energy.
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Please review
The discussion on fossil fuel and the intro is quite lengthy and your discussion on the availability of the raw materials for solar energy starts really late.
The 1st part of the main body of the answer should be discussed in a minimalistic manner.
The 2nd part of the main body is the real demand of the question and hence it should come into the scene bit early.
Your paragraphs are very lengthy and it does not bode well for the structure of your answer.
Your subheadings are getting hidden in the crowd of points or paragraphs. Highlight them properly.
Underline imp points in your answers otherwise, your answer looks quite monotonous with points after points and pints.
In lengthy discussions, use flowcharts to make the content better as well as bringing the X-Factor.
The 2nd part of the answer is decent.
The overall depth of the answer but the proper balance between 1st and 2nd part is missing.
Good conclusion.
Use some sort of image or flowcharts to make your answer interesting and content relevant.
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Underline imp points.
The balance is off in the answer because the 1st part is discussed with great details but the 2nd part, which was the main demand of the answer, is not.
Read the model answer for more points in the 2nd part.
Do not over-explain. This is the issue in the 1st part.
Keep your bullet points small. Right now they seem like small paragraphs and hence their purpose is lost.
The very purpose of bullet points is to make your content short and crisp.
Do not cut too much in your answers. This shows indecisiveness on your part to the examiner. Hence, think properly before writing. Take that extra second before framing the statement.
Good conclusion.
MOJO0101500D20984167
Very good answer.
The overall content is amazing and it has been structured decently.
The flow is fine and the language is short yet crisp.
All in all very good attempt
Underline the important points in your answers.
Give some space in your paragraphs.
MOJO9c30X00D35455509
Good answer.
Detailed answer.
The content is well placed.
The overall balance is decent in the main body.
You catered to the demand of the question perfectly.
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Do not mix your content and subheading. That is a bookish presentation style. The subheadings should be written separately from the ensuing discussion and highlighted properly.
Discuss the availability of raw material required for the generation of Solar energy in the world as well. Do not keep your discussion solely on the Indian aspects.
The 1st part of the answer is decent.
2nd part could have been handled in a better manner with more points and more dimensions.
Good conclusion.
Decent use of flowchart in the 1st part
payment id MOJO0108200A53118559
There is no conclusion in the answer.
The content is over-explained in the 1st part.
Underline imp points.
Do not make so many corrections in your answers.
Keep your intro and other paragraphs short and crisp.
The 1st part of the main body of the answer should be discussed in a minimalistic manner.
The main demand of the answer is the 2nd part of the answer.
The 2nd part is handled really well.
The overall structure is OK but can be improved by keeping the 1st part short.