3 ms·
Wouldn't switching to DC motors for both the fan and the compressor save a lot of power?
by kylehotchkiss 9y ago
Wouldn't switching to DC motors for both the fan and the compressor save a lot of power?
- jngreenlee 9y agoNot the source of significance, according to the article: "New research from the Lawrence Berkeley National Laboratory in California indicates that adding improved efficiency in refrigeration and phasing out fluorinated gases used for cooling, as mandated by international agreement, could eliminate a full degree Celsius of warming by 2100. Given that the “business as usual” trajectory leads to 4 to 5 degrees Celsius of warming, that is shaving off a pretty big slice. Hydrofluorocarbons, or HFCs, account for about 1 percent of global greenhouse gas emissions, but they can be thousands of times as potent than carbon dioxide "
- 21 9y agoI think you are talking about "inverter A/C"
- LeifCarrotson 9y agoThose require expensive rare-earth permanent magnets, and BLDC require expensive inverter controllers. Plus, even though the best BLDC are maybe 93% (after inverter losses) compared to a 90%, that's on the wrong side of the optimization problem, analogous to Amdahl's Law: Doubling insulation means you need half the energy in the first place, while doubling motor efficiency from 90% to 95% only saves 5%.