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In considering energy storage, the energy/power ratio is important. This is unlike vehicles. Most current battery development is with batteries where that ratio is < 2-3 hours, and energy density both by weight and volume important. The reason is that such batteries can ALSO be used when the ratio i...

Before going to university I worked over summer at a chemical site. On site they had 2 spherical storage spheres for liquified gas (iirc it was Propene), The critical temperature of propane is a little under 100C. If you fill a pressure vessel with liquid propane and close the valve, some of it wil...

We regularly produce about 8 MWh of photo-voltaic electricity. Because the rules are different, the program we were on allows "net billing" up to what we were using before the solar was installed. So no battery, because we are allowed in effect to use the grid as a giant battery, unlimited...

I have heard of a few underperforming systems, but this isn't something intrinsic to HPs, it is cause by things such as: undersized pipework, undersized emitters (rads), excessive zoning, etc. I fear that you are regurgitating FF industry misinformation! But THAT is why I was describing the issues ...

I am going to refrain from giving another Physics lecture. Just mention a few factors folks might want to look up) 1) The critical temperature for O and N (the temperature above which both will remain gasses regardless of how high the pressure) 2) Whether pressure vessels "scale" or not (i...

I was not trying to be condescending But it isn't possible for folks to understand misleading "hype" and manufacturer's claims about ASHP without basic Physics. Or why, IF GSHPs or WSHPs are practical alternatives at your location, they can perform better than ASHPs. Take "average&quo...

Interesting how often I hear “HPs are not effective in cold weather” however the exact same models we use are popular in Scandinavia. And here in the Austrian Alps, although in Scandinavia and here when it is really cold it is usually very dry too so not so much moisture in the air to cause icing i...

........ temp doesn’t warm the house enough - maintain log burners for those times when we are without power for a few days...... Moxi Not JUST for providing all the heat when no electric power. The "efficiency" (COP) of an ASHP heat pump decreases as the air temperature outside decreases...

Sorry, can't resist this. Snowing now, 2-4" expected 1000' elevation and above (this house is at about 1050'). Mind I am in a very different climate. The most I have experienced (in April) since moving to New England was 26"!. That sas before we bought this place in 1983, so maybe 1981v or...

PS Had someone tell me today I will regret getting a heat pump installed as they don't work :lol: I guess they don't know what a "heat pump" IS. Don't realize that THEY have them in their house. Working just fine, thank you, pumping heat out from the inside of an insulated into the room -...