Aloha

26 ms·

511.
by Aloha 3y ago
ooh, thats a great source - now that I've updated my calculator, your numbers match mine - I went with local prices for propane and DOE prices for propane.
512.
by Aloha 3y ago
If you're trying to compare the caloric content of two forms of energy, knowing what you can get out of the energy by itself is helpful. In the end, the HP will be up to 30% more efficient than strip heat (in my case the crossover poin
513.
by Aloha 3y ago
I went off median prices from DOE and found oil to come in at 32 cents per 10,000 BTU's propane at 24 cents per 10,000 BTU.
514.
by Aloha 3y ago
Heat Pumps absolutely blow both Fuel Oil and very nearly Propane out of the water in run cost, even when electricity is high. At 30f - until you exceed 15-15.5 cents per kWh, heat pump is cheaper to run than median oil price.
515.
by Aloha 3y ago
Bear in mind, I'm pro alternative energy, I'm a major advocate for nuclear - because once all of fossil fuels externalities are priced in - its very attractive pricing wise. But fossil fuels are not going anywhere, and no one (but
516.
by Aloha 3y ago
Even if you add a carbon tax a 200 dollars a ton, because of the relative inefficiency of generation and transmission, natural gas ends up being cheaper.
517.
by Aloha 3y ago
This just isn't accurate - you use less electricity yes, but not less energy. 1 kWh of electricity run thru a resistive heater will generate 3412 BTU 1 Ccf of gas contains the equivalent energy as 29 kWh, but will only generate 8.7 kWh
518.
by Aloha 3y ago
In a parallel comment I ran the numbers - and you're absolutely correct here.
519.
by Aloha 3y ago
Even if you price CO2 emissions in, both electricity and natgas rise - because of how much electricity is generated by gas - and how inefficient thermal generation is. 1 metric ton of carbon is about 19 Mcf of gas burned. 19 Mcf of gas cont
520.
by Aloha 3y ago
Yes, in the same way your Electric Furnace is turned on to do defrost with a Heat Pump, it just fires up the furnace for 3-5 min.
521.
by Aloha 3y ago
How do you calculate policies specifically for gas? There are tax advantages allocated to fossil fuel exploration, but not specifically for gas - and mostly just exploration.
522.
by Aloha 3y ago
Indeed, we could make electricity cheaper relative to gas to encourage HP usage, but the cost delta is high, you need electricity under 10c kWh to be competitive.
523.
by Aloha 3y ago
Right now 50% of the power I can buy at any given time is generated by burning natural gas - this is true in 80% of the country. So it doesn't really matter - it might if we build some nuclear or whatever, but right now, it doesn'
524.
by Aloha 3y ago
Yes - defrost means turning on Aux heat with the HP in A/C mode.
525.
by Aloha 3y ago
Yeah, in a parallel comment I noted that in most of the country an 80% gas furnace is cheaper to operate.
526.
by Aloha 3y ago
Heat Pump + 80% Gas Furnace is the best combination for most of the country. Both in terms of cost and efficiency. You get all the advantage of heat pump, and the cheaper defrost cycle from gas furnace. Consider how much of power generation
527.
by Aloha 3y ago
Nope! I still use screen - I dont really understand the compelling advantage of tmux and its replacements. Maybe better split screen support? Its not something I have ever felt a compelling need to use.
528.
by Aloha 3y ago
I'd really love to hear Dave Cutler's take on Rust.
529.
by Aloha 3y ago
I know they dont in the States - I dont know about elsewhere.
530.
by Aloha 3y ago
Does Costco even take Amex anymore? Maybe they still do in Canada?
531.
by Aloha 3y ago
Ford also allegedly had a stroke upon seeing film of the concentration camps. He's a mixed bag, generally - he had the engineers problem, he presumed being good at one thing, would make him good at and give him expertise in other thing
532.
by Aloha 3y ago
This book has been fairly and as far as I can tell, widely debunked, and if you've read it, the holes in the arguments it advances are obvious and manifold. Also, the complete lack of documentary evidence doesn't help - it even ov
533.
by Aloha 3y ago
How was America's semiconductor industry built? Yes, the megabucks put in by the government for Apollo and Military Programs were important, they created static demand - but the government neither planned nor built the technologies nee
534.
by Aloha 3y ago
Between the music on Mr. Rogers and the Vince Guaraldi music on the Peanuts special, a generation of Jazz lovers were launched.
535.
by Aloha 3y ago
I think your post makes a good point - the answer is, "it depends": If your build process is so bespoke/complex (or can only be produced with licensed, hard to obtain software) and there is no way for a layman (meaning someon
536.
by Aloha 3y ago
I wonder how many of those are LED now.
537.
by Aloha 3y ago
That gets even more true when you look at the RPN calculators used for engineering, science and business - all have special use cases. There are even calculators to make construction estimation easier too. Most people who are just using it
538.
by Aloha 3y ago
They use pierce top cardboard or metal sided cans? I'm not talking about metal cans with a screw top or port on it, these were completely sealed, and you had to use an external opener which pierced the metal top. All of the metal oil c
539.
by Aloha 3y ago
Specialized != Legacy != Obsolete I know lots of legacy technologies that are far from even approaching obsolescence. I know many specialty technologies that used to be mainstream. Thats sorta my point - like my industry uses 2w analog cont
540.
by Aloha 3y ago
The difference in how good two pro bowlers are is often fractions of a percent. Maybe a step back in technology would make the sport more interesting. I think that can be said for a bunch of stuff like pool, snooker, darts, golf, and bowlin

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