4 ms·
What an article of fluff. Doesn’t give any real technical/engineering information. It’s completely useless unless you show us the COP of the system at varying a
by 10u152 3y ago
What an article of fluff. Doesn’t give any real technical/engineering information. It’s completely useless unless you show us the COP of the system at varying ambient temps. Heat pumps can get to around 4.0 that’s the number to beat.
- drtgh 3y agoA whole article for to say that researchers found a ZT of 3.1 for certain temperatures. This is what since several years ago many researchers are obtaining (those ZT=3.1, that is 20% of efficiency? for eventual temperatures) with a mean of ZT=2 as much. Peltier effect cells remain inefficient, they are electricity guzzlers. I don't understand then the article's purpose.
- MichaelZuo 3y agoIEEE Spectrum's writing and editorial quality does seem to have gone down over the last decade. Though I'm not even sure what the target audience is anymore.
- nirolo 3y agoCame for this comment. Why is there no COP/SCOP mentioned at all... If you want to get into the market you should be competitive. And the COP of 4.0 you mention is actually the lower end. I'm heating with an AC as air-to-air heatpump now for the second winter and I chose the most efficient that I could get with a SCOP of over 6. And for the first winter I also could reach these numbers.