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2
votes
1answer
59 views

Simple solar light system

I've been looking for a simple solar powered lighting system for a carport I just built. I bought these without realizing how small they are: 2 Pack Solar Lights Outdoor. Unfortunately they look ...
4
votes
2answers
45 views

Does oil spilled in backyard contaminate groundwater?

A poster near a recycling station mentions that one liter of cooking oil contaminates 1 million liters of water and suggesting cooking oil recycling. If I spill cooking oil in the dirt of the backyard,...
1
vote
1answer
33 views

What alternatives exist for bean bag filler?

One of my kids has asked for a bean bag for their room. I'm hesitant, mainly because of the styrofoam/plastic filler beans which (I assume) are generally terrible for the environment when they ...
2
votes
1answer
44 views

Efficiently freezing an ice pack once per 48 hours

Question: What are some good electricity-efficient ways to cool an ice pack down to ~5 degrees C once every 48 hours? Background: I am in a warm climate and connected to the grid in a US city. I don't ...
0
votes
1answer
25 views

Callibrate a battery monitor for a ~5yr old 360Ah solar panel installation

I am looking to calibrate a new battery monitor for an off-grid battery bank that's ~5 years old, since the previous battery monitor stopped working recently. I'm not sure how to go about it given the ...
1
vote
1answer
67 views

How to dispose ultra-processed food?

A friend of mine just recently started avoiding any ultra-processed food because of health concerns. However he already had some in his storage room and some have passed their expiration date.This ...
5
votes
2answers
160 views

Water electrolysis for storing energy

When wind and solar generate surplus energy, can it be used to break water into oxygen and hydrogen and to store the gases in liquid form for later use as an energy source? Was this ever tried in any ...
2
votes
2answers
39 views

What is the most efficient disposition of windows to prevent thermal loss and improve lighting?

Glazing is expensive and causes thermal loss. With those two considerations in mind, what configuration of windows is the most efficient in terms of reducing the area used by windows and maximizing a ...
1
vote
3answers
59 views

Why do most car manufacturers prefer electric batteries over hydrogen fuel cells?

Is this due to cost, or infrastructure, or path dependency, or incentives? I understand that batteries are more efficient (1) - but this does not take into account the quantity of rare materials ...
3
votes
1answer
31 views

Effects of refrigerating vegetables that I'm supposed to freeze

I recently experimented with storing "frozen edamame" in my refrigerator for 7 days (about 45 degrees F/7 deg C), instead of the freezer. There were seemingly no ill effects. So that made me ...
1
vote
0answers
29 views

Calculating U values - Am I doing it correctly?

I have recently moved into a property that needs refurbishment and insulation. It has late 60s - early 70s cavity walls. I wanted to work out what the current U value is across the property and what ...
1
vote
1answer
44 views

Gnat problem with a rotating composter

I use a Maze Compost Tumbler, which is a 2-sided rotary composter, to compost kitchen scraps. By volume, I add equal parts kitchen scraps, sawdust and peat moss whenever I add the scraps. It is ...
4
votes
4answers
84 views

Soil Restoration Issue - How to deal with thousands of small pine stumps?

Background: Just acquired a 4-acre lot in Southern Virginia. It was recently cleared of a ton of small (roughly 6-foot-tall) pine saplings that look like they were mechanically planted. I am not ...
0
votes
0answers
22 views

Trying to read display data on my new MPPT solar controller

I've got a new EPEver 30a MPPT solar controller and single 320 watt 40v solar panel connected 4 feet away with 12awg wire. Very simple van setup my battery is a single 12v deep cycle 115AH. Note: ...
4
votes
1answer
46 views

How do solar panels degrade after 25 years of warranty?

This question is focused on high quality solar panels (certified Tier 1) which are more and more mainstream. The 25 years warranty is becoming standard, and producers describe degradation in 25 years ...
1
vote
1answer
51 views

Are a significant portion of electric vehicle batteries reused as grid-connected batteries?

I've heard lots of people mention that concerns about the sustainability of electric vehicles are mitigated when you consider that at end-of-life the batteries can be reused as stationary, grid ...
3
votes
3answers
87 views

How can smaller businesses go carbon neutral?

Lots of big companies are making grand pledges to go carbon-neutral (or even carbon-zero, removing historical emissions). It is feasible for a smaller company (that is, businesses that’d never be ...
1
vote
1answer
40 views

Is Hygenic Earth Energy feasible?

This company: https://proton.energy/ Is trying to inject oxygen into old oil wells for it to combust and extract only hydrogen using steam reforming and a filter. Making steam reforming happen ...
6
votes
1answer
21 views

How to account for second life usage of lithium ion batteries in a life cycle analysis?

I am looking to conduct a life cycle analysis (LCA) to investigate the total greenhouse gas (GHG) emission contributions from lithium ion (Li-ion) batteries. The first part of their lifecycle is ...
4
votes
2answers
107 views

Is it safe to compost a pumpkin that has paint on it?

I have recently seen some pumpkins being curved for Halloween into jack-o'-lanterns and noticed it in some cases they are also being decorated with paint. I understand that pumpkins should normally be ...
1
vote
0answers
19 views

Life cycle inventory data or information concerning Ferrocyanide production

I am working in the modelling and environmental evaluation of redox flow batteries based on Anthraquinone and Ferrocyanide. Currently I am having difficulties in finding information on how ...
2
votes
1answer
63 views

What happens to all the shards of broken glass that get recycled?

I searched for recycling glass and there are no results. https://www.chestercountyswa.org/DocumentCenter/View/1646/New-Mixed-Paper-Guidelines?bidId= What happens with the broken glass in the recycling?...
2
votes
2answers
60 views

How can I recycle an enameled cast iron dutch oven?

I have an enameled cast iron dutch oven that has become unusable due to how cracked and chipped the enamel is. I need to get rid of it, and I'd hate to throw it away because there are several pounds ...
0
votes
0answers
15 views

How to identify electric blankets that are likely to be durable?

Are there any design elements or other indicators that could help me identify whether a particular type of electric blanket is likely to be durable (and how durable)? Are there any resources out there ...
1
vote
0answers
15 views

Partial Passive Solar Jury-Rigs?

I live in an apartment, with the authority to make minor modifications, and I am wondering whether there are any fairly low-effort passive solar design elements that I can incorporate. Any ideas? ...
2
votes
0answers
23 views

Long-run marginal energy cost of my water use?

As a residential water consumer on US city water, I am used to thinking about the marginal environmental cost (particularly energy cost) of my additional water use, based on considerations like ...
1
vote
1answer
24 views

How does the cost of wastewater treatment scale?

Is it the case that some of the energy expenditure associated with wastewater treatment is more proportional to the amount/type of waste than to the amount of treated water (meaning that my water has ...
0
votes
1answer
31 views

Where in the US water system does most chilling occur?

A few studies I've seen investigating the energy intensity of water use in the US specifically enumerate the energy use of chilling*. Where in the system does most of that happen? How common/for what ...
1
vote
0answers
15 views

Residential water pumping

Is it common for people on city water in the US to have their own on-site pumping as part of the "standard" delivery system, or is the pressure usually entirely supplied by the municipal ...
2
votes
0answers
16 views

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not?

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not? Under what circumstances would this be an ecologically reasonable way to provide water to ...
2
votes
0answers
43 views

Embodied energy of cold water

There is a significant chance that this has been covered on SE, but I haven't yet found anything similar enough for my taste (see related questions, below). Question: How could I go about coming up ...
1
vote
0answers
15 views

DIY Powdered Biodegradable Soap

I love Dr. Bronners unscented liquid soap! I can use it as dish washing liquid, body wash, laundry detergent, and shaving soap. And it's biodegradable so I can use it on the trail when backpacking! It ...
0
votes
1answer
30 views

Will this work to prevent my pipes from freezing?

I live in an apartment in the US midwest, and during the winter my pipes freeze unless I trickle my faucet. I think that the point at which it freezes is in a difficult-to-access exterior wall on the ...
2
votes
0answers
39 views

How do 'Eco' vs 'Quick' modes compare for washing clothes?

A lot of washing machines offer different washing modes which change various run settings: Cotton (or 'General'), Towels, Bedsheets, Wool and so on. Most even have settings for 'Eco Mode' - which (if ...
0
votes
1answer
31 views

How much coil do I need to heat a given length of pipe (as a function of x,y,z)?

I'm imagining heating some water pipes using heating coils similar to these. Under various conditions, would I need to apply almost continuous lengths of heating coil to the entire length of pipe? Or ...
0
votes
0answers
48 views

How much do I need to trickle my faucet in cold weather (as a function of x,y,z)?

I am told that, in cold weather, I should let my faucet trickle a little to prevent pipes from freezing, especially if some portion of my above-ground pipes are likely to get cold. Are there any rules ...
2
votes
0answers
53 views

How to hatch eggs at home without a bulb-based incubator?

I came across some videos on YouTube where they used a home-made incubator to hatch hen eggs. The system was nothing fancy: A cardboard box with a light inside Some aluminum foil near the bulb (...
1
vote
1answer
31 views

Help me safely mod my freezer

I want to connect my freezer to an external thermostat like this to maintain a higher temperature than it otherwise could. Are there any thermostats or other control devices that would keep the ...
1
vote
1answer
38 views

Why do the best energy star freezers have higher capacity and lower rated power consumption than the best refrigerators?

The title says it all; I'm looking for any qualitative information that can help me. Freezers: https://www.energystar.gov/productfinder/product/certified-residential-freezers/details/2255167 ...
0
votes
0answers
10 views

How long can I safely store tofu at various temperatures?

I'm talking about store-bought water-packed tofu. I'm sure it depend partially on the expiration date. The main thing I want to know is the highest temperature that I can probably get away with ...
2
votes
1answer
36 views

Can I insulate my refrigerator to improve efficiency?

Any "reasonable" methods would be appreciated. I have heard that this can be done but I'm dubious that it would do much. Maybe if I put polyethylene on the right bits?
1
vote
3answers
67 views

Keep my hands warm while working on a laptop?

I want to keep my hands warm(er) while working on a laptop in a cold room. Would it make sense to take a polar fleece blanket, fold it in half, sew together the two edges that are perpendicular to the ...
3
votes
0answers
23 views

How to keep my tankless water heater safe in a cold room?

I have a room in my apartment that can sometimes get around 40°F (4°C), and that's where my new tankless water heater is stored. Should I take any special precautions to keep my pipes from freezing or ...
2
votes
1answer
43 views

Most energy-efficient way to keep my pipes from freezing without tearing up walls/floor?

I live in a second-floor apartment in the US Midwest. For a few weeks per year, I have found that I need to turn on the baseboard heater in my kitchen in order to prevent the pipes in the kitchen and ...
2
votes
1answer
89 views

Most efficient cheap heating system for small apartment in the US midwest?

I live in the US Midwest and am looking to upgrade from my current old baseboard heaters to a more energy-efficient solution. Any ideas? I am already well advanced on a parallel project of home ...
1
vote
1answer
26 views

What is the difference in CO2 emissions between new and old double decker buses?

The Euro 6 bus WHTC test cycle here shows a value of 4.0 carbon dioxide and the Euro 5 ESC & ELR test cycles show a value of 1.5 CO. https://en.wikipedia.org/wiki/European_emission_standards It ...
2
votes
0answers
23 views

Help me estimate my annual refrigerator power consumption from this data sheet?

I am shopping for refrigerators and looking at this model. Feel free to let me know if that's stupid. But my main question is this: I'm trying to come up with a moderately conservative power ...
1
vote
0answers
13 views

How does the EPA estimate annual power consumption for refrigerators?

I'm trying to get a simplified idea of how the EPA estimates annual power consumption for refrigerators, e.g. here. There are a number of reasons why I want to know this, but there are three big ones: ...
0
votes
1answer
37 views

How much of glacier ice in the Alps already melted?

Various news media articles claim that Two-thirds of glacier ice in the Alps 'will melt by 2100' https://amp.theguardian.com/environment/2019/apr/09/two-thirds-glaciers-alps-alpine-doomed-climate-...
0
votes
1answer
16 views

How do I find an efficient AC-DC converter for low-power applications?

My understanding is that AC-to-DC converters each have their own "sweet spot" in which they achieve their rated or advertised maximum efficiency. I want something with maximum efficiency at ...

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