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1500 questions
4
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Which is best for dealing with food waste -- composting or a biogas digester?
Let's say I have the option to send my food scraps to either a composting site, or a biogas digester. Both are industrial scale, following best practices.
The output from each is high quality and replaces conventional product in the market, to the…
LShaver
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What can be used to power an incinerator that produces electricity?
What can and cannot be sent to an incinerator plant (Virginia) for producing electricity from heat? Can there be anything other than plastics, metals, and paper products in the bin?
Jessica Campbell
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4
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1 answer
Are foam netting sleeves recyclable?
I am wondering if foam netting sleeves that are often used to protect glass bottles in transport (see picture) can be recycled in a soft plastic stream? (like RedCycle in Australia)
stragu
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4
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Which measure of solar irradiance is needed to calculate the energy output of PV systems?
According to "E = A * r * H * PR" global formula to estimate energy generated, the solar irradiance value is needed. I have Horizontal irradiance, Tilted irradiance, and Normal irradiance values but which measure of irradiance to use here? Or is it…
yash
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4
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2 answers
What was the repowering programme that caused a spike in Danish turbine decommissioning in 2002?
This pdf on Danish Renewable Energy Policy by Preben Maegaard refers on page 11 to
A repowering programme that had been launched by the previous government resulted in a short term revitalisation of the sector in 2002
The figures from the Danish…
410 gone
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4
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How much increase in GHG emissions is caused by Amazon Prime?
From Wikipedia:
Amazon Prime is a paid subscription service offered by Amazon that gives users access to free two-day delivery (one-day in some areas) [...] and other benefits for a monthly or yearly fee. In April 2018, Amazon reported Prime had…
LShaver
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4
votes
1 answer
Solar charging an e-bike's lithium battery while riding
I would like to know what parts I would need to charge a 36V lithium battery for an ebike? I want to charge the battery while riding the bike for greater range.
zorrindrax
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4
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4 answers
Alternatives to bottled water in the UK
I live in Devon, and tap water in my household does not taste consistently. When I moved in my current property, the neighbours warned me that they had been buying bottled water since 20 years, because of the bad taste and other suspects about the…
usumdelphini
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4
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3 answers
What sort of pellet mill can be used for biofuels?
I'm thinking that it would be useful to have a pellet mill at home to turn biowaste into fuel pellets. It would be nice to turn sawdust and wood shavings into fuel pellets as well but that I think is a different ball game as it requires much greater…
Graham Chiu
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4
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2 answers
Differences in efficiency between oven, toaster oven, and stove?
Wondering how efficient different cooking methods are (for the sake of example, assume a dish in a cast iron pot heated by stovetop vs. oven).
Stove seems to use less energy than an oven (as the heating elements are smaller), but both of the former…
Jamie PW
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4
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1 answer
Which type of BBQ grill has less of an environmental footprint, charcoal or propane or what?
Of course buying used vs. new makes a big difference, but in any case, if one is set on purchasing a BBQ grill, is there less environmental impact in the production & use of a charcoal vs. a propane grill?
I figure charcoal doesn't necessarily rely…
cr0
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4
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1 answer
Large-scale test data on LED, CFL, and incandescent brightness and longevity
A google search for "comparing LED, CFL, and, incandescent brightness" returns hundreds of charts showing what equivalent wattage of LEDs and CFLs are to match an incandescent bulb. This is fine for figuring out what bulb to use at home -- I'm…
LShaver
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4
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1 answer
How can I install solar panels far from the regulator?
I'm building a solar installation for a summer camp, and we were looking at the following kit (1000W, 12V) We wanted to have the regulator+inverter in a closed little stall, but that stall is usually in the middle of the campsite so we need to have…
dieortin
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4
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3 answers
Can the heat generated in a data center be used to heat households and offices?
I've just read the article Microsoft sinks a data center off the Scottish coast (The Verge, 6 June 2018)
I understand that the cooling of a data center is a problem. Data centers produce huge amounts of heat, and they have to run at normal…
Jonas Sourlier
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4
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1 answer
Can Asphalt and concrete be recycled at long term?
Asphalt and concrete are substances where a lot of heavy metals and other materials being hazardous to one's health are being "deposited". But what to do with them when concrete and asphalt have passed their life time or when they are substituted by…
Salt
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