I'm 90% sure this is how it works. Not 100%. Will be happy to be corrected if this is wrong
Cooling eff on Smurfy is really simple (My mechlab fu actually sucks)
For instance, let's consider
http://mwo.smurfy-ne...d5344f23b81ab64
Smurfy takes the entire cycle of an alpha, in this case, weighted average of (the duration + cooldown of the IS LPL) and (duration + cooldown of IS ML) which is ~3.9 s
Calculation would be [3 * (LPL cycle) + 4* (ML cycle)] / 7 (no of weapons)
Now multiply this cycle value by the amount of heat dissipated by your mech every second. Since we have 20 DHS split as 10 engine DHS (0.2 h/s) and 10 ext DHS (0.14 h/s) we get 3.4 h/s as our dissipation. On multiplying, you get the value of heat dissipated per weapon cycle i.e. 3.4 * 3.9 = 13.3 heat.
Now divide this by the total heat generated on an alpha strike 13.3/37 (7*3 + 4*4)
~0.35 = 35%, which is the number displayed.
What this cooling efficiency number means is that,
35% of your alpha strike heat will be dissipated before the next alpha. It does NOT take into account quirks or skills (in which case my heat efficiency with this build is ~39%).
http://mwo.smurfy-ne...2426e78530c2cd6
Consider this next, cycle value would be [3 * 1.66 + 2* 3.9]/5
[Cycle value (5) * 2 (dissipation/s) ] / 11 is 0.46 which is 46%. (smurfy shows 47)
If you want ACCURATE sust/max DPS and cooling eff estimates, you'll have to do it all by hand, or download Li Song mechlab.
https://steamcommuni...s/?id=686548357 Smokey's excellent guide, includes information on how MWO's mechlab calculates cooling efficiency.
Edited by Keshav Murali, 06 August 2016 - 08:40 AM.