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![]() | #16 |
BHPian Join Date: Feb 2023 Location: Kochi
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions
I feel like these are the same kind of questions being asked over and over when it comes to electrification. 🤔 |
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BHPian Join Date: Sep 2010 Location: Bengaluru
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
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BHPian ![]() Join Date: Aug 2017 Location: Faridabad
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions
Panels need to be cleaned once or twice an year. Majority of the plants currently use water to wash the panels but there are new water less ways being invented for cleaning the panels |
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BANNED Join Date: Aug 2023 Location: Mumbai
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Infractions: 0/1 (5) | Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
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BHPian ![]() Join Date: Apr 2020 Location: Delhi
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quick question to expert here - We have a family land (approx 6 acres) near Najafgarh, Delhi which is vacant with only boundary wall and gate done. I've been contemplating converting it into Solar land and selling power to discoms. Post incurring all the installation cost, do you guys think it can be a profit generation business ? What subsidy & other support does government provide ? |
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BHPian ![]() Join Date: Apr 2022 Location: Chennai
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
Further, IEA has listed the plausible reasons for increase in CO2 emissions in 2022. Quote:
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions There are no solutions, only trade-offs - said an often ignored wise man in the west. Nuclear energy is often ignored as it is politically incorrect and the perception of danger on the heels of Chernobyl and Fukushima is still widely prevalent. But safety standards have improved vastly and they can provide the energy needed to power any country's needs. Sadly they are being given up at an alarming pace. Solar and wind are not dependable throughout the year. Besides, both are a significant threat to native and migratory bird populations. Coal will remain the primary source of power in developing countries for the foreseeable future no matter however many climate accords these countries sign. |
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![]() | #23 | |
Senior - BHPian Join Date: Aug 2017 Location: Leeds
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Right, been meaning to chip in to this thread. Wearing my old offshore wind hat, wanted to add a few points: Yes, there's a valid criticism about offshore wind (and solar) being intermittent and thus not really capable of meeting baseload energy supply. The sexy solution is energy storage, either in the form of batteries or potential energy to name but a few (pump water up into a reservoir at a higher elevation to release later when you need to backfill the grid). One that gets overlooked is that we've not fully tapped the potential of offshore wind, that'll come with floating offshore wind most likely. The benefits of these are that they essentially allow you to have your turbines tethered to the seabed further out to sea where you have more persistent winds that the shallow ~50 m depths of current offshore wind where you need to be able to mount the turbine foundations on the seafloor. Thus not only do you get the benefit of being able to have ever bigger turbines that don't run afoul of NIMBYism and cries of ruining someone's view, but they avoid busy shipping lanes and fishing waters typically close to the coast. Furthermore, the lack of needing to physically embed the turbine foundations means you can avoid the costly ground engineering work for the build stage, not to mention the sort of pre-installation scoping studies (geophysical, geological, geotechnical) that you'd need. Going by my old consultancy rates, that's a hefty old cost saved, plus the floating turbines themselves are not that far off cost wise to existing fixed offshore turbines. You do raise a good point about many of the earliest turbines coming to the end of their service life. This is true, and it's not a problem that got much thought because it wasn't a large scale issue till now. That being said there is work already being done and some coming to fruition in terms of how to repurpose those turbine components. Check out this article a few days ago: https://www.bbc.co.uk/news/uk-northern-ireland-66735712 Take this excerpt for eg: Quote:
https://www.mapstand.com/mapstand-datasets-renewables/ ![]() Baseload power generation is a big issue granted. Right now that's still powered by thermal powerplants, typically coal. However proponents for nuclear will argue that with our current options, there's no other clean option that can meet that requirement. A problem with big nuclear projects that is still an issue is the fact they cost absolute mountains of money, and that they take a long time (take Hinckley Point C in the UK for eg). You can argue then that nuclear will be too late to make an impact. But what if we could standardise production of nuclear powerplants? It's fitting then that barely a week on from the death of the architect of France's nuclear power grid that I get to cite the incredible example of said country. France's decision to go all in on nuclear is the main reason they've consistently had the lowest per capita carbon footprint of their electricity grid in Europe and well up there globally amongst other clean national power grids. The French essentially picked a standard design and then went to town mass producing all the components for it. What that meant is that they were afforded veritable decades of clean power for their entire national grid. For those wanting a video explainer, Brian McManus of the Real Engineering Youtube channel has a great video I'd encourage you to watch. Another field being pursued is small modular nuclear reactors (SMRs). There's a fair few groups pursuing this at scale. At their simplest, we have the tech already, if you think about it you'll recognise them in all the world's nuclear submarines and aircraft carriers. Sure enough, speak long enough to anyone working in the defence space and they'll be very matter of fact about saying so. But the main benefit of the SMR is that it brings down the prohibitive cost of nuclear energy and the long lead time as well. Here's another great primer from Brian McManus on the same: I realise that I've not even delved into nuclear waste. I'm mindful that I've already written a pretty long treatise thus far so I'll be succinct. Modern nuclear fuel sources for the latest powerplants produce quite a lot less waste than you probably are picturing right now in your head. That being said, there's a number of projects globally pursuing geological waste storage. Simply put the best options are to store either ultra deep in a granitic body (what the Scandinavians are pursuing, so Sweden and Finland) or explore the use of salt caverns in the subsurface (being studied in the US and the UK). Happy to share some resources on these if anyone wants more info. Before I sign off, one area being missed SmartCat is that a Huge chunk of the energy budget of northern hemisphere countries goes towards their heating bills. Space heating uses conservatively a quarter of total energy. Finding ways to mitigate this can vastly reduce our carbon footprint. Therein lies the potential to exploit heat networks (at district scale ideally) connected to clean heating solutions like geothermal waters. Typically when you think of geothermal one imagines the powerplants in Iceland but to generate electricity from geothermal you need a particular combination of geology and geography (Iceland for eg sits above a mantle plume - think a blow torch somewhere below the crust pointing right up). Instead we can make use of the fact that the deeper down you go, the warmer it gets to exploit warmer waters in the subsurface. Coupled to ground source heat pumps, you could then conceivably have lukewarm waters available under many urban centres becoming the source for clean heating energy. (Shameless plug) This is essentially what my research boils down to (pun intended). Oh and for the energy storage afficionados on here, there's also the prospect of seasonal heat and cooling, where in summer we recharge the heat in the subsurface to exploit in the winter. (I probably lost most of you long ago - I'll do a TLDR at some point) | |
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Team-BHP Support ![]() ![]() | Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
https://ndb.technology/. NDB, or Nano Diamond Battery, is an innovative energy generator and storage that redefines and revolutionizes the battery as we know it. Its long-lasting properties and longevity are ensured by converting the radioactive decay energy from nuclear waste into energy. NDB is tiny, modular, cost-effective, and scalable from chipset to industrial applications. ![]() The technology is actually quite old. Spacecraft that NASA sends to jupiter or pluto or out of the solar system are powered by similar tech. Quote:
Last edited by SmartCat : 20th September 2023 at 09:52. | ||
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Team-BHP Support ![]() ![]() | Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
Wikipedia articles or random news articles about "global warming" is simply not enough to understand all the issues and solutions that are being worked by people in this field to solve such issues. That's because one article or few articles will not cover the entire topic. Last edited by SmartCat : 20th September 2023 at 10:27. | |
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![]() | #26 | |
BHPian Join Date: May 2023 Location: Riyadh
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Infractions: 0/1 (5) | Re: Unanswered Questions about Renewable Energy & CO2 Emissions All is not bad. Engineers/Scientists do their job at the back end. You will be able to see a drastic change (hopefully) in the graphical representation from 2024 onwards. I Have been indirectly involved on a project "Carbon capture and storage", its a state of the art project, Norway (equinor) is leading from the front and other players are following, in short, the process is like, 1. Capture the CO2 at the source. (Atmosphere/refineries/Thermal Power Plants/Cement Plants etc.) 2. Once captured will be transported to a geological storage facility. 3. CO2 will be injected deep into rock formations and stored there forever (Safely). The depth can range from 1-3kms under earth’s crust I don't know how bad is it to store CO2 deep within the earth's crust (I bet a lot of brain storming must have done prior to reaching to this idea). But I feel All is not bad, it’s a work in progress to undo the damage which have been done due to the industrialization over hundreds of years. Catch 22 situation. Environmentally speaking, this is the new "in-thing" for the coming decades. Countries having developed this technology and storage facilities will have the upper hand. Subjected to people at higher ups are actually serious about global warming and it' s not only a lip service. Also, such large-scale offshore/onshore CO2 storage is a viable means to help meet net-zero carbon emissions over a period of time. I hope the world has sufficient technical prowess and commitment to achieve this. Link 1 Link 2 Link 3 Quote:
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BHPian ![]() Join Date: Aug 2017 Location: Faridabad
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
Simple example - 5 why approach for root cause analysis. The emphasis is not on the questions, questions are way to reach the cause so that a solution can be found. I am stating my intention again as I wrote in my previous post Quote:
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
The Northern Lights consortia actually has two project components as shown in this schematic below. Longship, which is centred around collecting and transporting the captured CO2 from industrial processes, and the actual injection and storage ![]() Here's a cartoon schematic of what the subsurface looks like vaguely for those interested ![]() Quote:
For more on Denmark's Energy Islands: Well actually we've been injecting CO2 into depleted reservoirs for decades now. The Sleipnir project in the North Sea has had CO2 injected into it since 1996, with the behaviour of the CO2 plume within this subsurface reservoir being monitored closely since. There's absolute reams of data regarding this. Quote:
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Thinking big picture, if we could make a carbon value chain, a carbon economy of sorts, then it could be industrially beneficial as well for say India to explore setting up similar schemes whereby it too exploits its offshore to sequester carbon produced by its growing economy. I'm not familiar as to where India is in this domain but it's definitely a sector that deserves leaving simmering on the back burner at the very least, less we get caught playing catch up when CCUS is mature. | ||||
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Senior - BHPian Join Date: Aug 2017 Location: Leeds
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| Re: Unanswered Questions about Renewable Energy & CO2 Emissions Quote:
To bring it back to the nuclear waste issue, the last time I came across such a seemingly ludicrous sounding proposal as the NDB was at a nuclear waste conference. Rather predictably the speaker was American, and he was proposing utilising the latent heat emitted by the stored nuclear waste in it's first level containment (think large oil drums, except lead and cement lined). What this speaker seemed to miss that this nuclear waste powered geothermal energy solution would compromise the very integrity and purpose of the geological disposal facility (GDF). Quote:
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