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Floating solar: a small but vital role for India’s sunrise sector

Posted on May 17, 2022 by dishanth

India’s G20 presidency next year offers a “golden opportunity” to accelerate the deployment of renewable energies, environment minister Bhupender Yadav told reporters on April 26 in a meeting with the International Renewable Energy Agency (IRENA). This year is a litmus test for progress, representing a deadline for India’s renewable energy target of 175 gigawatts.

While floating solar photovoltaic (FSPV) was not originally envisaged as part of the mix, which only included terrestrial and rooftop solar, it has emerged as a small but not insignificant catalyst for the figures.

Despite later including large hydropower in the renewable category to help meet the target of 175 GW, which originally included only small hydropower, India is still set to miss the goal, with 156.6 GW of utility-scale renewables as of March 2022, plus an estimated 11 GW of rooftop solar.

The shortfall, due mostly to the slow development of rooftop solar, highlights the need to further diversify India’s portfolio of green energy sources.

Solar cookers designed by engineers of Barefoot College in Tilonia, Ajmer, Rajasthan, India tower over a woman. Image: Knut-Erik Helle, CC BY-SA 3.0, via Flickr.

An alternative to terrestrial solar

India’s journey with floating solar began in 2014 when it was approved by the Ministry of New and Renewable Energy (MNRE), in Kolkata. S P Gon Chaudhuri, a veteran of the country’s renewable energy sector, told The Third Pole: “The organisation tasked with implementing this project was NBIRT [the NB Institute for Rural Technology], of which I was chairman at the time.”

When we start looking for a piece of land, it isn’t easy. In places with a lot of land, there are too many projects and hence, transmission is a challenge. Floating solar addresses so many problems

Manu Srivastava, commissioner for new and renewable energy, Madhya Pradesh

Once the project was completed, “officials from organisations such as the World Bank visited the site and examined how a floating solar plant is set up, how it works”, Chaudhuri recalls. “Basically, it was a study centre.”

Plants in Punjab, Kerala, Gujarat and Tamil Nadu followed, among others. India’s reservoirs cover 18,000 square kilometres with the potential to support 280 GW of floating solar, according to a report by think tank The Energy and Resources Institute (TERI).

High costs and design challenges are still holding back the deployment of the new technology, which as of November 2021 had an estimated cumulative installed capacity of just 2.7 megawatts, making it little more than a pilot project.

However, according to the think tank Council on Energy, Environment and Water (CEEW), India now has about 170 MW of operational floating solar capacity and another 1.8 GW under different stages of development. The steep increase, a CEEW spokesperson explained, is due to the fact that the first plants deployed were small, and India has only started implementing large-scale floating solar in recent years.

Terrestrial solar PV is land-intensive, and the TERI report recommends exploring alternatives such as floating solar to keep pace with India’s national target of 100 GW of additional solar capacity by the end of 2030. The state of Maharashtra, the authors say, has the most potential and could generate 57.9 GW on 3,173 sq km of its reservoirs’ surfaces.

“The FSPV addition is small in relation to the entire market for solar energy, but it could be a viable alternative for speeding up solar power deployment in India,” a 2021 study by researchers at Effat University in Saudi Arabia stated.

Floating solar milestones

Recent developments in the floating solar space hint at the sector’s promise. In August last year, government-owned NTPC, India’s largest integrated energy company, commissioned a 25 MW project on the reservoir of its Simhadri thermal power station, in the state of Andhra Pradesh.

The plant has the potential to generate electricity from over 100,000 solar PV modules, which could light around 7,000 households and avoid the emission of at least 46,000 tons of carbon dioxide every year over its lifespan.

In January 2022, the state-owned hydropower corporation NHPC signed a deal with a developer in the eastern state of Odisha to build a 500 MW floating solar plant. It will initially invest over INR 20 billion (USD 261 million) in 300 MW-worth of floating solar projects. The project will help the state to meet its renewable energy generation targets, besides creating investment and employment opportunities.

On March 10, 2022, Tamil Nadu’s chief minister MK Stalin inaugurated India’s largest floating solar power plant, which was constructed at a cost of INR 1.5 billion (USD 19.6 million).

Scarce land, more water

Most Indian states lack land, but have enough water for FSPV. Installing solar on water can increase the panels’ efficiency due to lower temperatures that prevent overheating, Chaudhuri explained.

Manu Srivastava, commissioner for new and renewable energy with the government of Madhya Pradesh, said: “When we start looking for a piece of land, it isn’t easy. In places with a lot of land, there are too many projects and hence, transmission is a challenge… Floating solar addresses so many problems.”

Avnish Shukla is executive engineer at Rewa Ultra Mega Solar Ltd, a joint venture that has commissioned solar projects in Madhya Pradesh. Shukla told The Third Pole that a 600 MW floating solar plant in the state of Madhya Pradesh will be commissioned by August 2023, likely to be one of the largest in the world.

Shukla said that solar projects often occupy barren land, not used by agriculture, industry or people. “Since there is scarcity of such a type of land, we face trouble… In such a scenario, water bodies are perfect. Moreover, water will evaporate if we do not use it to install solar panels [to reflect the sun’s rays].”

Vinay Rustagi, the managing director of Bridge to India, a renewable energy consultancy, pointed out that some floating solar sites that are located near hydropower projects or in thermal plant reservoirs already have ready access to their transmission infrastructure.

Falling costs

Ground-based installations still form 93.1 per cent of India’s grid-connected solar PV, according to a 2020 report by TERI. Utility-scale solar costs fell 84 per cent between 2010 and 2018, making large-scale solar cheaper in India than anywhere else.

According to Chaudhuri, the cost of setting up a floating solar plant is currently INR 50-60 million (USD650,000-780,000) per MW, while conventional land-based solar projects cost the equivalent of USD 520,000 per MW, a difference that explains the slow take-off of the technology. However, he said, floaters and maintenance are becoming more cost-effective.

“India needs to meet certain targets it has committed to by 2030, which means states need to adopt more such [floating solar] plants, as they do not have so much land to spare,” he said.

According to Srivastava, transporting the lightweight but big floaters the panels sit on can be a challenge. However, these are low-tech components, so manufacturing plants installed near the development site could bring costs down further.

Floating solar projects do require longer due to the need for more detailed assessments of sites’ hydrography and water-bed topography. Furthermore, both the capital and operating costs are slightly higher due to the more complex design and risks of working in water, Srivastava added.

Rustagi, however, said the local governments and municipal agencies in charge of most inland water bodies must push for them.

Binit Das, deputy renewable energy programme manager at New Delhi think tank the Centre for Science and Environment, agreed but said there are other, more technical hurdles to overcome: “The solar floating system needs to hold solar panels on the water for over 25 years, so the racking system needs to be highly resistant to corrosion, must have a long lifespan and high load capacity.”

He added: “Since this is a relatively new solar power technology, it requires specialised solar power equipment and more niche solar panel installation knowledge.”

This story was published with permission from The Third Pole.

Source Eco Business

The world has a new path to sustainable energy and net zero emissions — ‘green hydrogen’

Posted on January 3, 2022 by dishanth

The time is right to tap into hydrogen’s potential to play a key role in tackling critical energy challenges. The recent successes of renewable energy technologies and electric vehicles have shown that policy and technology innovation have the power to build global clean energy industries.

Hydrogen is emerging as one of the leading options for storing energy from renewables with hydrogen-based fuels potentially transporting energy from renewables over long distances – from regions with abundant energy resources, to energy-hungry areas thousands of kilometers away.

Green hydrogen featured in a number of emissions reduction pledges at the UN Climate Conference, COP26, as a means to decarbonize heavy industry, long haul freight, shipping, and aviation. Governments and industry have both acknowledged hydrogen as an important pillar of a net zero economy.

The Green Hydrogen Catapult, a United Nations initiative to bring down the cost of green hydrogen announced that it is almost doubling its goal for green electrolysers from 25 gigawatts set last year, to 45 gigawatts by 2027. The European Commission has adopted a set of legislative proposals to decarbonize the EU gas market by facilitating the uptake of renewable and low carbon gases, including hydrogen, and to ensure energy security for all citizens in Europe. The United Arab Emirates is also raising ambition, with the country’s new hydrogen strategy aiming to hold a fourth of the global low-carbon hydrogen market by 2030 and Japan recently announced it will invest $3.4 billion from its green innovation fund to accelerate research and development and promotion of hydrogen use over the next 10 years.

You might encounter the terms ‘grey’, ‘blue’, ‘green’ being associated when describing hydrogen technologies. It all comes down to the way it is produced. Hydrogen emits only water when burned but creating it can be carbon intensive. Depending on production methods, hydrogen can be grey, blue or green – and sometimes even pink, yellow or turquoise. However, green hydrogen is the only type produced in a climate-neutral manner making it critical to reach net zero by 2050.

We asked Dr Emanuele Taibi, Head of the Power Sector Transformation Strategies, International Renewable Energy Agency (IRENA) to explain what green hydrogen is and how it could pave the way towards net zero emissions. He is currently based with the IRENA Innovation and Technology Center in Bonn, Germany, where he is responsible for assisting Member Countries in devising strategies for the transformation of the power sector, and currently managing the work on power system flexibility, hydrogen and storage as key enablers for the energy transition. Dr Taibi is also a co curator for the World Economic Forum’s Strategic Intelligence platform, where his team developed the transformation map on Hydrogen.

Green hydrogen technologies

What motivated you to develop your expertise in energy technologies and how does your work at IRENA contribute to it?

It was during my Master’s thesis. I did an internship in the Italian National Agency for Energy and Environment (ENEA), where I learnt about sustainable development and energy, and the nexus between the two. I wrote my thesis in management engineering about it and decided this was the area where I wanted to focus my working life. Fast forward almost 20 years of experience in energy and international cooperation, a PhD in Energy Technology and time spent in private sector, research and intergovernmental agencies, I currently lead the power sector transformation team at IRENA since 2017.

My work at IRENA is to contribute, with my team and in close cooperation with colleagues across the agency and external partners such as the World Economic Forum, in supporting our 166 Member Countries in the energy transition, with a focus on renewable electricity supply and its use to decarbonize the energy sector through green electrons as well as green molecules like hydrogen and its derivatives.

What is green hydrogen? How does it differ from traditional emissions-intensive ‘grey’ hydrogen and blue hydrogen?

Hydrogen is the simplest and smallest element in the periodic table. No matter how it is produced, it ends up with the same carbon-free molecule. However, the pathways to produce it are very diverse, and so are the emissions of greenhouse gases like carbon dioxide (CO2) and methane (CH4).

Green hydrogen is defined as hydrogen produced by splitting water into hydrogen and oxygen using renewable electricity. This is a very different pathway compared to both grey and blue.

Grey hydrogen is traditionally produced from methane (CH4), split with steam into CO2 – the main culprit for climate change – and H2, hydrogen. Grey hydrogen has increasingly been produced also from coal, with significantly higher CO2 emissions per unit of hydrogen produced, so much that is often called brown or black hydrogen instead of grey. It is produced at industrial scale today, with associated emissions comparable to the combined emissions of UK and Indonesia. It has no energy transition value, quite the opposite.

Blue hydrogen follows the same process as grey, with the additional technologies necessary to capture the CO2 produced when hydrogen is split from methane (or from coal) and store it for long term. It is not one colour but rather a very broad gradation, as not 100% of the CO2 produced can be captured, and not all means of storing it are equally effective in the long term. The main point is that capturing large part of the CO2, the climate impact of hydrogen production can be reduced significantly.

There are technologies (i.e. methane pyrolysis) that hold a promise for high capture rates (90-95%) and effective longterm storage of the CO2 in solid form, potentially so much better than blue that they deserve their own colour in the “hydrogen taxonomy rainbow”, turquoise hydrogen. However, methane pyrolysis is still at pilot stage, while green hydrogen is rapidly scaling up based on two key technologies – renewable power (in particular from solar PV and wind, but not only) and electrolysis.

Unlike renewable power, which is the cheapest source of electricity in most countries and region today, electrolysis for green hydrogen production needs to significantly scale-up and reduce its cost by at least three times over the next decade or two. However, unlike CCS and methane pyrolysis, electrolysis is commercially available today and can be procured from multiple international suppliers right now.

Green hydrogen energy solutions

What are the merits of energy transition solutions towards a ‘green’ hydrogen economy? How could we transition to a green hydrogen economy from where we are currently with grey hydrogen?

Green hydrogen is an important piece of the energy transition. It is not the next immediate step, as we first need to further accelerate the deployment of renewable electricity to decarbonize existing power systems, accelerate electrification of the energy sector to leverage low-cost renewable electricity, before finally decarbonize sectors that are difficult to electrify – like heavy industry, shipping and aviation – through green hydrogen.

It is important to note that today we produce significant amount of grey hydrogen, with high CO2 (and methane) emissions: priority would be to start decarbonizing existing hydrogen demand, for example by replacing ammonia from natural gas with green ammonia.

Recent studies have sparked a debate about the concept of blue hydrogen as a transition fuel till green hydrogen becomes cost-competitive. How would green hydrogen become cost competitive vis-à-vis blue hydrogen? What sort of strategic investments need to occur in the technology development process?

The first step is to provide a signal for blue hydrogen to replace grey, as without a price for emitting CO2, there is no business case for companies to invest in complex and costly carbon capture system (CCS) and geological storages of CO2. Once the framework is such that low-carbon hydrogen (blue, green, turquoise) is competitive with grey hydrogen, then the question becomes: should we invest in CCS if the risk is to have stranded assets, and how soon will green become cheaper than blue.

The answer will of course differ depending on the region. In a net zero world, an objective that more and more countries are committing to, the remaining emissions from blue hydrogen would have to be offset with negative emissions. This will come at a cost. In parallel, gas prices have been very volatile lately, leaving blue hydrogen price highly correlated to gas price, and exposed not only to CO2 price uncertainty, but also to natural gas price volatility.

For green hydrogen, however, we might witness a similar story to that of solar PV. It is capital intensive, therefore we need to reduce investment cost as well as the cost of investment, through scaling up manufacturing of renewable technologies and electrolysers, while creating a low-risk offtake to reduce the cost of capital for green hydrogen investments. This will lead to a stable, decreasing cost of green hydrogen, as opposed to a volatile and potentially increasing cost of blue hydrogen.

Renewable energy technologies reached a level of maturity already today that allows competitive renewable electricity generation all around the world, a prerequisite for competitive green hydrogen production. Electrolysers though are still deployed at very small scale, needing a scale up of three orders of magnitude in the next three decades to reduce their cost threefold.

Today the pipeline for green hydrogen projects is on track for a halving of electrolyser cost before 2030. This, combined with large projects located where the best renewable resources are, can lead to competitive green hydrogen to be available at scale in the next 5-10 years. This does not leave much time for blue hydrogen – still at pilot stage today – to scale up from pilot to commercial scale, deploy complex projects (e.g. the longterm geological CO2 storage) at commercial scale and competitive cost, and recover the investments made in the next 10-15 years.

Several governments have now included hydrogen fuel technologies in their national strategies. Given the rising demands to transition towards decarbonization of the economy and enabling technologies with higher carbon capture rates, what would be your advice to policymakers and decisionmakers who are evaluating the pros and cons of green hydrogen?

We will need green hydrogen to reach net zero emissions, in particular for industry, shipping and aviation. However, what we need most urgently is:

1) energy efficiency;

2) electrification;

3) accelerated growth of renewable power generation.

Once this is achieved, we are left with ca. 40% of demand to be decarbonised, and this is where we need green hydrogen, modern bioenergy and direct use of renewables. Once we further scale up renewable power to decarbonise electricity, we will be in a position to further expand renewable power capacity to produce competitive green hydrogen and decarbonise hard-to-abate sectors at minimal extra cost.

The future of green hydrogen

Where do you see energy technologies relating to hydrogen evolving by 2030? Could we anticipate hydrogen-powered commercial vehicles?

We see the opportunity for rapid uptake of green hydrogen in the next decade where hydrogen demand already exists: decarbonising ammonia, iron and other existing commodities. Many industrial processes that use hydrogen can replace grey with green or blue, provided CO2 is adequately priced or other mechanisms for the decarbonisation of those sectors are put in place.

For shipping and aviation, the situation is slightly different. Drop-in fuels, based on green hydrogen but essentially identical to jet fuel and methanol produced from oil, can be used in existing planes and ships, with minimal to no adjustments. However, those fuels contain CO2, which has to be captured from somewhere and added to the hydrogen, to be released again during combustion: this reduces but does not solve the problem of CO2 emissions. Synthetic fuels can be deployed before 2030, if the right incentives are in place to justify the extra cost of reduced (not eliminated) emissions.

In the coming years, ships can switch to green ammonia, a fuel produced from green hydrogen and nitrogen from the air, which does not contain CO2, but investments will be needed to replace engines and tanks, and green ammonia is currently much more expensive than fuel oil.

Hydrogen (or ammonia) planes are further away, and these will be essentially new planes that have to be designed, built and sold to airlines to replace existing jet-fuel-powered planes – clearly not feasible by 2030: in this sense, green jet fuel – produced with a combination of green hydrogen and sustainable bioenergy – is a solutions that can be deployed in the near term.

In conclusion, the main actions to accelerate decarbonisation between now and 2030 are 1) energy efficiency 2) electrification with renewables 3) rapid acceleration of renewable power generation (which will further reduce the already low cost of renewable electricity) 4) scale up of sustainable, modern bioenergy, needed – among others – to produce green fuels that require CO2 5) decarbonisation of grey hydrogen with green hydrogen, which would bring scale and reduce the cost of electrolysis, making green hydrogen competitive and ready for a further scale up in the 2030s, towards the objective of reaching net zero emissions by 2050.

This article was originally published in the World Economic Forum.

Source The Print

‘No time for invention’: path to net-zero is there for the taking, Irena chief says

Posted on July 6, 2021July 6, 2021 by dishanth

“There is no time to reinvent the wheel.”

This is according to Francesco La Camera, director general of the International Renewable Energy Agency, based in Abu Dhabi.

Proven technology for net-zero energy production already largely exists today but it will take political will and nation-led action to reverse climate change, he told The National.

Mr La Camera took up his post in 2019 and is a little over halfway through his four-year term. He joined Irena at a decisive time for climate change and the achievement of the Paris Agreement. He is tasked by the agency to “redefine the structure and operations” to keep its 180 member countries actively engaged in the fight.

The inter-governmental body, now 12 years old, promotes renewable energy and technology and helps countries plan and carry out energy transitions.

“At the end of this decade, the world will know if the Paris Agreement will be reached or not,” said Mr La Camera. Political will around the climate change agenda “is much better” than when he took up his post two years ago, he said.

‘When we look at implementation, we notice it is very far from what is written down on paper”

Franceso La Camera, director general of Irena

Global renewable energy capacity rose by 10.3 per cent to 2,799 gigawatts in 2020, according to Irena. China and the US, the world’s two biggest economies, were the best-performing countries in terms of renewable energy growth.

Globally, more than 260 gigawatts of wind capacity were added, a 50 per cent increase compared with 2019. Solar energy made up more than 48 per cent of last year’s renewable capacity additions, accounting for 127 gigawatts.

“The reality is overcoming my expectations,” Mr La Camera said of the renewable energy capacity added in 2020.

Over time, countries are also increasing ownership of their climate agendas.

A key piece of the Paris Agreement are the “nationally determined contributions”, or NDCs. These are plans that outline climate actions and policies that each nation aims to enforce in response to climate change.

Central to the UN’s plan for the NDCs was the concept of national determination. But “a failure of the NDC was the big role of the consultants”, as well as the lack of real buy-in from governments, said Mr La Camera.

“When we look at implementation, we notice it is very far from what is written down on paper,” he said.

To that end, Irena is increasing its efforts to tailor recommendations and projects for regions and nations. In addition to its work with net-zero scenario planning, “there is support for national planning. Doing it in a way that we don’t do consultancy, we work together. It is really important that the planning is owned”.

As an agency that works among governments and the private sector, not as a political organisation, he said the rigour and objectivity of Irena’s analysis is what sets it apart from a crowded field of players aiming to set the agenda.

The “future of the agency”, Mr La Camera said, is on an online platform Irena unveiled in 2019 to connect renewable energy project owners, potential financiers or investors, services providers and technology suppliers.

Mr La Camera said the marketplace has fielded more than 200 ideas for projects since its start.

He likened it to zooming in a camera – from the global analysis done by the agency’s number crunchers, primarily based in Bonn, Germany, down to the planning and financing of a renewable energy project on the ground and monitoring its output once operational.

He pointed to the recent inauguration of one of the largest solar projects in West Africa and the first renewable energy complex in Togo, which became fully operational earlier this month.

The Sheikh Mohamed Bin Zayed solar photovoltaic power plant in Togo, one of the largest in West Africa, has the capacity to provide electricity to about 160,000 homes and small businesses. Courtesy: Abu Dhabi Fund for Development

The 50-megawatt Sheikh Mohamed Bin Zayed solar power plant, financed under the Irena-ADFD Project Facility, has the capacity to provide electricity to about 160,000 homes and small businesses, significantly reducing the country’s dependence on firewood, charcoal and fuel imports for energy consumption.

“This project is showing that in Africa this [energy transition] is possible,” said Mr La Camera.

Abu Dhabi financed the project and is a climate leader in the region, placing itself “in the middle” of the climate conversation, he said.

Over the past six years, the UAE has led the way in driving down the price of solar energy through some of the most competitive bids on utility-scale projects. Mr La Camera said he believes the region can help lead again in lowering the cost of hydrogen as well.

Record low tariffs for solar power projects among oil-exporting states of the Middle East could allow for the development of low-cost green hydrogen, which refers to the clean fuel produced entirely from renewable sources.

“Renewables are the cheapest source of power,” he said.

Declining costs for renewables are a challenge to coal’s dominance as a cheap source of fuel, particularly in developing economies.

Irena is also engaging with the world’s biggest economies. India, Indonesia, the US and China are of particular interest because they are “countries that are more like continents”.

This month, Irena and China announced that they will prepare a comprehensive energy transition road map to help China achieve its medium- and long-term national renewable and decarbonisation goals.

China, currently the world’s biggest emitter of greenhouse gases and biggest oil importer, pledged to hit its carbon dioxide emissions peak by 2030 and has vowed to become carbon-neutral before 2060.

Mr La Camera said the agency is “quite confident” in China’s ability to hit its goals.

Globally, Irena forecasts that the transition to net-zero carbon emissions will be dominated by renewable power from wind and solar, green hydrogen and bioenergy.

A combination of different technology is needed to keep the planet on a 1.5°C climate pathway – nothing entirely new is needed, but incremental improvements to efficiency and the will of markets and governments can go a long way in this “decade of action”.

Mr La Camera is also a firm believer that the market will not turn back. Investors and the private sector are anticipating the energy transition and are actively looking for investment, allocating capital away from fossil fuels and towards energy transition technology and sources such as renewables.

An analysis of the S&P Clean Energy Index in 2020 by Irena found that clean energy stocks were up by 138 per cent, as compared to the fossil fuel-heavy S&P Energy Index which was down by 37 per cent.

“Will climate change? The process is unstoppable,” said Mr La Camera.

But he said one questions lingers: “will we be in time to win the fight?

Source The National News