Why Heat Pumps are Immensely Important Right Now

He made several excellent videos explaining residential heat pumps: [2021-02-28] [link] "Heat Pumps: the Future of Home Heating" (35m14s) [2021-04-01] [link] "Ground Source / Geothermal Heat Pumps and Other Info" (28m03s) [2022-03-26] ▶ this video "Why Heat Pumps are Immensely Important Right Now" (21m02s) [2022-04-13] [link] "Heat Pumps are Not Hard: Here's what it will take to start pumping" (46m32s)

in “Do heat pumps work in cold climates?” · View on HN

Heat pumps have come a long way. ▶ this video gets into the energy efficiency of heat pumps and their temperature tolerances.

in “TSMC ups Arizona investment from $12B to $40B with second semi fab” · View on HN

Yes, apparently there have been huge advances in the efficiency of heat pumps since then. And this is why ground source heat pumps are less of a thing these days: you don't need the help of that underground temperature as much. This guy gets really excited about heat pumps: ▶ this video [link]

in “Sierra Club, environmental groups petition EPA to ban natural gas for heating” · View on HN

This is not true since the vast majority of electric whole home heating units sold today are heat pumps, which are up to 300% efficient [1]. If the power generation and distribution is 33% or higher efficiency, then a heat pump will outperform a natural gas furnace operating at 100% efficiency. EDIT - Here's a video that explains it much better than I could, although it's a bit long, this YouTuber is great. [2] [1] [link] [2] ▶ this video

in “What a gas stove ban means for restaurants” · View on HN

Another one of my "came across this in YouTube" things (started with the design of a hurricane lantern) Why Heat Pumps are Immensely Important Right Now - ▶ this video The key is the Coefficient of performance [link]

in “No, you can’t save £30 per year by switching off your “standby” devices” · View on HN

>Burning something for heat is always more effective, cheaper, and produces fewer emissions compared to an electric heater... >If you’re getting electric heat from coal fired steam that’s always worse than burning the coal locally to heat something, and this is true for all emission-producing power sources. Apparently you can actually save natural gas with electric heat and a heat pump. ▶ this video

in “Interest in heat pumps has increased dramatically in recent years” · View on HN

Article failed to mention that wind/solar storage can be usefully teamed-up with the another (renewable) energy source, the heat in the ground ... which is nearby many of our houses. Today's heat pumps can work well for many down to outdoor temperatures of about 5 degrees F (-15C). They'll bring down the cost of using the other sources. [ ▶ this video ]

in “No Sun, No Wind, Now What? Renewable Energy Storage” · View on HN

So off-peak pre-cooling, did I read your comment right? That has been talked about quite a bit actually. Technology Connections made a nice YouTube video ( ▶ this video ) about it. I'm a bit surprised though that off-peak pre-cooling isn't more common or even widely incentivised, especially with the rise of smart home and IoT stuff. All I've seen is reduction (so less cooling) during peak, if I'm not remembering wrong, people were quite annoyed with that.

in “Energy crunch concerns lead Japan’s government to call for reduced AC use” · View on HN

I’m backtracking the debate here so feel free to ignore this. I just watched the latest Technology Connections video about heat pumps[1] where he talks about the total energy savings in replacing gas stoves with heat pumps to provide residential heating, with total energy savings up to 5 times. This goes to show my previous point about how “[w]e don’t need to replace carbon power 1:1 if we patch up the inefficiencies of our current energy use.” So to answer your concern that: > Electrifying railways and other transportation is going to increase electricity usage, not decrease it. All else being equal, yes. However we are not going to replace the energy consumption 1:1. Electrical railways have the potential to be far more efficient in the energy use. Especially if you consider the potential increase in traction allowing better track usage which will pull super inefficient cars and lorries from the road and onto the tracks. Also a minor correction: > So assuming that electricity consumption is going to decrease is a very dubious prospect. No, I don’t assume that. However I am hopeful that we can easily decrease our total energy consumption as we electrify. Meaning that if we are still pumping gas to put into our newly electrified infrastructure and consumer systems, there is a potential that we need to pump less of it for the same benefits because of how much more efficient these new electrified systems are over the old fossil fuel powered ones. 1: ▶ this video

in “Nuclear power helped prevent ~2M deaths in the last 50 years” · View on HN

Sure they exist. But it's more than just "swap one unit with another" which was the claim above. Heat pumps are actually pretty efficient, down to low temperatures. Have a look at [link] where Alec discusses that. Around Chicago you can expect to have only a few days in winter where the COP is bad: ▶ this video

in “Why Germany won’t keep its nuclear plants open” · View on HN