Travis Jordan wrote:

...at 8.0 SEER, 3T (36K BTU) is 36,000/8 or 4.5KW/h.

That's just kW, vs "KW/h," ie 4.5 kW of power, vs 9 kWh of energy if
it runs 2 hours, but 8.0 may be the best case...

I actually measured 92 cfm of 45.3 F airflow cooled from 63.3 yesterday
with 537 watts and calculated 1802 Btu/h of cooling with a 0.98 COP, vs the
9.7SEER/3.412 = 2.84 I expected from the $98 Haier window AC box. I'll
measure the heating COP today, and the $69 "10.2 SEER" Daiwoo... Room ACs
are tested according to DOE 10 CFR 430 Subpart B, Appendix F, at 26.7C [80 F]
db/19.4C wb indoors and 35C [95 F] db/23.9 C wb outdoors. I suppose they are
designed to meet those conditions vs my 63 F room temp and hot fin airflow
restriction. This could heat water in summertime, but it doesn't seem likely
to work all year in a basement, which may kill the water heating economics,
where I live. More basement humidity might help, eg a damp basement floor.
We might dampen the basement floor in wintertime and let it dry in summertime.
We only need AC for 1-2 weeks/year.

A 50 F wet basement floor has Pw = e^(17.863-9621/(50+460)) = 0.367 "Hg, vs
Pa = e^(17.863-9621/(40+460)) = 0.252" Hg near a 40 F AC fin, so a 1000 ft^2
basement might provide 100x1000(Pw-Pa) = 11.5K Btu/h of latent heat, according
to one ASHRAE swimming pool formula, with a 100x0.252/0.367 = 69% basement RH.

I started measuring airflow by moving the Testo stick across a 2"x12" slot
in a cardboard box that collected the cool air, but the readings bounced
around a lot, even with no change in position, with 2:1 differences within
the slot. Next I tried a $400 Dwyer thermo-anemometer, which won't read as
low as the Testo but has more damping. Then I foil-taped a 12"x4" to 6" round
right-angle register boot to the cool outlet and added 5' of 6" pipe, which
reduced the airflow swirling a lot, while warming it a little. There was some
condensation on the outside of the pipe and more inside the AC, which ran out
when I tipped it later. Counting that would improved the COP (as would
disconnecting the fan motor.)

Nick