Isn’t that entirely dependent on your electrical rate? There must be some break even point right?
Kind of weird to think of mining as a way to reduce your carbon emissions but in some cases it certainly can be.
I'll definitely look more into heatpumps when it comes time to replace my furnace or air conditioner, but my understanding is they perform quite poorly in Canadian winters.
It has to be more inefficient as you are not spending energy on calculation but if you substitute it with selling your bitcoins you would need to compensate your co2
edit: quick google -> and here it is :)
So the mining itself doesn't use any energy, it's just that instead of dumping power into a dumb coil of wire, you dump it into a smarter coil of wires and various components that produce some output (that happens to be valuable to the Bitcoin network and it rewards you in exchange) as a side-effect.
For any given watt of electricity, the heat output is the same, just that with a miner you also get useful calculation results out of it.
Heat is the most retrograde form of energy - the form with the most entropy. You can put 100W into a resistor, and you’ll get out 100W of heat. You can put 100W into a lightbulb, and it will generate less than 100W of light and some heat (because it’s not perfectly efficient) but in a room with no windows that light will bounce around until it’s absorbed by the walls and turned into heat so the room will heat up the same as if you had a 100W heater. If you put 100W into a miner, it will mine bitcoins and shed 100W of heat.
Water always runs downhill, energy always follows entropy down into heat.
Edit: Maybe this example will make more sense - consider an old fashioned record player. If the turntable is magnetically levitated, and is in a vacuum chamber, you can spend a tiny amount of energy to spin the table up to 45 rpm, and then (with no needle on the record) it will spin at that speed basically forever, because it's in a frictionless environment (there's no real frictionless environment, of course - you'll need a tiny amount of energy to keep it going). If you have an old turntable from the 70s where all the cheap grease has hardened, then to keep it spinning, the motor will have to do some work. Let's say you're putting 5W in to keep it turning. That 5W is overcoming the friction from the air, and from the old grease, and from the belt drive that runs the turn table. That friction is generating 5W of heat. It has to be, because if it was generating less than 5W of heat then either we'd be using less than 5W to maintain a steady state, or the else the turntable would be accelerating until we were using 5W to maintain a steady state.
If you can get a water-water heat pump you'll be fine for sure (requires drilling a rather deep hole in your backyard tho, so the initial investment is a bit bigger)
Heat pumps don't perform very well, or at all, when it's -30° or -40°, so a secondary heat source is needed. Usually, that will be natural gas, in which case why bother with a heat pump when you can just burn much cheaper natural gas?
In my mind they're just different kinds of heat pumps.
And yeah, drilling is pretty expensive, but once the system is installed, heating is ridiculously cheap. When my parents installed geothermal, ROI was estimated to about 5 years for their house iirc.
But then it may well be that drilling is cheaper here by virtue of being more common, idk.
Have you actually done that calculation out? You say "primarily provided by", but I wonder what that means, given just how much electricity you need to actually heat a home via GPUs.
(You may of course be saving money given the profit you generate, but that's not the same thing as reducing emissions.)
Of course, I'm not heating my entire home with a single GPU, merely offsetting a small portion of my overall heating cost.
I think you are likely mistaken, although it is a surprisingly common misconception. Most places in the world, if you are using an extra kWh of power, the system needs to generate up to an extra marginal kWh from coal or gas.
Example 1: France generates power 70% from nuclear. However if a French person uses an extra kWh during base load, that could easily lead to one less kWh exported, which would most likely mean one extra kWh is generated from say coal somewhere else in Europe.
Example 2: New Zealand generates 60% of power from hydro. If I use an extra kWh of power at the moment (even at cheap rates), then if we have a drought in 6 months time, then an extra kWh needs to be generated from coal in 6 months time. I am presuming the coming critical storm[1] this weekend won’t fill our hydro lakes[2] and that the predicted long term dry weather pattern[0] will occur. I am a New Zealander.
You could be right if you are only using your power when it is cheapest (which usually implies the usage of base load nuclear), although it is surprisingly difficult to actually figure out whether you have generated zero extra carbon.
[0] https://www.rnz.co.nz/news/national/441393/hydro-power-more-...
[2] https://www.transpower.co.nz/system-operator/security-supply...
[1] https://www.newshub.co.nz/home/new-zealand/2021/05/rare-red-...
Edit: on second thoughts in NZ I am sure our lakes can’t fill that quickly from one good storm - the inflow rate is limited by the size of the river and the inflow rate is small compared to the storage size?
While it's true that fossil fuels do provide an important role in variable management of the grid still, this is also accomplished with hydroelectric quite heavily in my area and over time the rates of each production method will adjust accordingly so I think it's still a reasonable assessment to look at overall production.
For example, during any period that the nuclear and hydro are running at capacity. If you reduced your constant power usage by 1kWh then during those peak periods, 1kWh less gas generation would be used by the network.
If your constant 1kWh of electricity would otherwise be exported to the US if you didn't use it, then it could be that 1kWh less coal generation would be used at some times.
Most people find it difficult to think about how their marginal increase in usage very often will cause extra CO2. Even writing this comment down has made me think about how CO2 production also depends on the future predictions of generators. It is complicated, but worth spending time to think about.
Except now you have to compare efficiency of your natural gas system vs efficiency of the power plant + electric heater. Chances are that energy efficiency of the power plant + an electric space heater (which is what you're turning your PC into) is smaller than the efficiency of your furnace. Quick googling comes up with energy efficiency of 60% for natural gas powered plants, while I don't think you'll be able to buy a gas furnace that has efficiency smaller than 80% these days...
IIUC, the only way you can mine without worrying about energy usage is if you have electric space heaters in your home - then it doesn't matter if you turn on the PC or the heater. Or if you own solar panels and you are producing more than you are not able to use (or sell).
Last I checked, heat pumps didn't produce assets of potentially increasing value as a side effect of moving heat around.
It tried to compare it with heat pumps.
The break-even point is 8c per kWh. But there will be other overheads, so you probably need 6c per kWh to actually make a profit.
Such prices most be possible to obtain in a few oil rich countries like Saudi Arabia and Iraq.
Of course this is moot when you're not paying the bill, as this story says.
It doesn't include Transmission, distribution, taxes or whatever a "Capacity Charge" is.
The bill previous was 3.9.
The majority of those fees are fixed cost so don’t scale linearly with usage.
If you shut off your bitcoin miners during the warmest parts of the day, your capacity charge will go down.
Hourly rates/smart meters were not yet available to consumers (commercial customers could get different plans, IIRC).