1) Provided a fridge is not all the time, but is on some of the time, can you humanly input the same power as a fridge uses (different if not started warm)?
So could that much energy be supplied by human power? Yes, probably.
So that's coincidentally almost exactly 1kWh / day, which translates to 41.7 Watts per. hour average --
and I believe these are likely normal usage numbers involving opening / closing the unit often, adding new items to be refrigerated, making ice, things one could cut back on during a power outage.
On a typical leisurely workout I easily sustained more than 41W output according to my exercise bicycle so truly it could
be done even manually on a generator bicycle.
And of course one can buffer excess in a battery to avoid needing to be quite so continual.24 hours a day continuous activity? Again, feel free to demonstrate this, do make a video of you providing 1kWh a day. 99% of the population will fall over spectacularly.
Typical residential fridge+freezer, 300-400kWh per year:
Typical residential fridge+freezer, 300-400kWh per year:
https://www.energyrating.gov.au/calculatorPoster asked about a fridge, not fridge+freezer.
You can get standalone fridges that need half of that power easily.
To be precise I don't really agree with your statement that it is necessarily outside the range achievable by most people, rather a more likely correct statement would be that it's well outside the range *achieved* by most people between their late-teen years and middle age. Clearly it wouldn't be productive to consider "most people" numerically including infants, toddlers, octogenarians, et. al.
But "performance athlete" level endurance with moderate strength / power output anyway is precisely what we're mostly all genetically / biologically "equipped" to be able (biologically) to achieve (given suitable prerequisite fitness conditioning).
Nomadic physically active lifestyles, surviving harsh conditions without technology, struggling physically just to survive vs.
predation, starvation, migration, etc. Consider what may have been a much more "average person" level of fitness 13ky-1My ago for a hominid vs. today. So with regular exercise / effort I wouldn't be at all surprised if the "average" young/mid-adult could become fit to achieve / well exceed that output power for 12-18 hours anyway with sleep becoming a barrier past that.
It is after all an "endurance" level of power output so like running a marathon (which is routinely done by young and old even not-so-performance-athlete types) it's mostly about a baseline level of cardio fitness and then sheer willpower and routine.
From the graph you cited the required level of fitness to generate -- asymptotically -- an energy production rate meeting 1kWh/day
is actually under the curve of "NASA curve for healthy men" implying to me that normally healthy men should be able to do that for
say 55W/18h or maybe 41.7W average / 24 hours or some other power-time integral that meets the energy production rate.
That isn't seeming to say it is only achieved by uber-athletes, though being able to do that and still get sleep normally and carry that on beyond 24 hours is clearly challenging due more to the "down time" of sleep than the actual endurance level wattage needed.
When consumer says fridge they almost always mean a 2 door fridge+freezer combination
When consumer says fridge they almost always mean a 2 door fridge+freezer combination1. This is EEVBlog, engineers should define things in specific terms.
logs\BikeBrake_05-11-2011_20h16m09s.raw 1:10:09.3 76.15
logs\BikeBrake_05-13-2011_14h12m10s.raw 1:10:07.0 88.05
logs\BikeBrake_05-16-2011_11h31m29s.raw 1:10:10.3 94.37
logs\BikeBrake_05-19-2011_08h34m19s.raw 1:10:08.3 92.38
logs\BikeBrake_06-19-2011_15h28m41s.raw 1:10:13.9 99.89
logs\BikeBrake_06-20-2011_12h35m14s.raw 1:10:10.2 91.49
logs\BikeBrake_06-21-2011_11h06m35s.raw 1:12:44.0 99.88
logs\BikeBrake_06-22-2011_12h24m06s.raw 1:10:06.0 101.35
logs\BikeBrake_06-23-2011_10h46m00s.raw 1:10:11.3 100.46
logs\BikeBrake_06-30-2011_16h42m45s.raw 1:10:08.0 100.60
logs\BikeBrake_07-02-2011_13h44m35s.raw 1:10:13.6 97.37
logs\BikeBrake_07-04-2011_10h47m49s.raw 1:10:09.0 102.89
logs\BikeBrake_07-05-2011_11h44m08s.raw 1:10:10.0 104.29
logs\BikeBrake_07-10-2011_12h56m26s.raw 1:10:08.6 101.98
logs\BikeBrake_07-11-2011_16h36m57s.raw 1:10:12.9 97.06
logs\BikeBrake_07-18-2011_13h12m12s.raw 1:10:09.1 100.71
logs\BikeBrake_07-20-2011_14h00m53s.raw 1:10:12.4 100.42
logs\BikeBrake_07-24-2011_13h41m13s.raw 1:10:20.2 103.44
logs\BikeBrake_08-01-2011_15h37m30s.raw 1:10:10.9 100.62
logs\BikeBrake_08-03-2011_13h47m30s.raw 1:10:11.3 104.12
logs\BikeBrake_08-04-2011_18h02m08s.raw 1:10:15.8 95.95
logs\BikeBrake_08-09-2011_12h59m31s.raw 1:10:14.7 104.57
logs\BikeBrake_08-18-2011_14h22m33s.raw 1:10:14.3 97.13
logs\BikeBrake_08-20-2011_16h52m49s.raw 1:10:10.5 96.79
logs\BikeBrake_08-22-2011_16h52m24s.raw 1:10:11.0 95.79
logs\BikeBrake_08-23-2011_14h59m23s.raw 1:10:06.5 93.97
logs\BikeBrake_08-28-2011_18h03m05s.raw 1:10:13.7 95.18
logs\BikeBrake_09-06-2011_14h59m03s.raw 1:10:14.0 90.67
logs\BikeBrake_09-11-2011_16h45m30s.raw 1:10:16.3 94.06
logs\BikeBrake_09-16-2011_17h30m48s.raw 1:10:15.0 101.04
logs\BikeBrake_09-18-2011_18h15m57s.raw 1:10:16.3 96.54
logs\BikeBrake_10-06-2011_10h59m14s.raw 1:10:33.8 86.90
logs\BikeBrake_10-10-2011_14h31m06s.raw 1:10:23.4 96.37
logs\BikeBrake_10-11-2011_14h32m33s.raw 1:10:14.6 100.29
logs\BikeBrake_10-22-2011_21h05m47s.raw 1:10:13.6 87.47
logs\BikeBrake_10-26-2011_17h27m12s.raw 1:10:08.3 82.98
logs\BikeBrake_11-04-2011_19h48m32s.raw 1:10:11.0 83.67
logs\BikeBrake_11-19-2011_20h21m35s.raw 1:10:15.0 87.35
logs\BikeBrake_11-21-2011_20h29m18s.raw 1:10:13.9 88.13
logs\BikeBrake_12-05-2011_11h36m14s.raw 1:10:13.3 76.95
logs\BikeBrake_12-07-2011_09h22m58s.raw 1:10:14.6 87.37
logs\BikeBrake_12-16-2011_11h47m23s.raw 1:10:22.3 87.33
logs\BikeBrake_12-18-2011_21h37m56s.raw 1:10:46.6 71.83
logs\BikeBrake_12-19-2011_20h31m55s.raw 1:10:20.1 75.96
logs\BikeBrake_12-29-2011_01h30m36s.raw 1:10:14.6 70.85
logs\BikeBrake_12-29-2011_15h31m58s.raw 1:10:19.7 85.47
logs\BikeBrake_01-01-2012_18h24m41s.raw 1:10:11.5 82.06
logs\BikeBrake_01-02-2012_23h40m48s.raw 1:10:21.0 75.89
logs\BikeBrake_01-03-2012_14h48m30s.raw 1:10:08.2 89.10
logs\BikeBrake_01-06-2012_00h08m40s.raw 1:12:28.3 91.47
logs\BikeBrake_01-09-2012_13h01m36s.raw 1:10:08.7 88.87
logs\BikeBrake_01-11-2012_19h10m47s.raw 1:10:11.7 94.32
logs\BikeBrake_01-14-2012_04h15m45s.raw 1:10:08.2 82.67
logs\BikeBrake_01-15-2012_03h09m43s.raw 1:10:12.4 81.97
logs\BikeBrake_01-16-2012_14h10m47s.raw 1:10:13.3 92.30
logs\BikeBrake_01-18-2012_14h23m24s.raw 1:10:12.5 92.82
logs\BikeBrake_01-19-2012_16h36m15s.raw 1:10:11.2 94.84
logs\BikeBrake_01-24-2012_18h00m16s.raw 1:10:14.1 86.09
logs\BikeBrake_01-27-2012_21h35m06s.raw 1:10:13.1 80.81
logs\BikeBrake_01-28-2012_16h19m43s.raw 1:10:16.9 95.11
logs\BikeBrake_01-30-2012_15h49m53s.raw 1:10:11.4 93.37
logs\BikeBrake_01-31-2012_13h51m08s.raw 1:10:10.1 96.24
logs\BikeBrake_02-01-2012_16h09m28s.raw 1:10:09.7 93.08
logs\BikeBrake_02-04-2012_21h23m43s.raw 1:10:13.6 88.37
logs\BikeBrake_02-06-2012_19h30m21s.raw 1:13:33.4 94.25
logs\BikeBrake_02-07-2012_18h22m55s.raw 1:10:07.9 97.75
logs\BikeBrake_02-16-2012_20h55m57s.raw 1:10:16.5 91.16
logs\BikeBrake_02-18-2012_09h27m13s.raw 1:10:11.5 93.05
logs\BikeBrake_02-20-2012_03h36m49s.raw 1:10:14.2 87.21
logs\BikeBrake_02-22-2012_07h04m19s.raw 1:10:16.9 101.13
logs\BikeBrake_03-04-2012_09h29m26s.raw 1:10:14.8 90.05
logs\BikeBrake_03-08-2012_14h48m36s.raw 1:10:12.0 91.71
logs\BikeBrake_03-09-2012_13h29m48s.raw 1:10:10.3 91.68
logs\BikeBrake_03-11-2012_13h28m52s.raw 1:11:03.5 93.60
logs\BikeBrake_03-14-2012_11h28m55s.raw 1:10:10.4 95.04
logs\BikeBrake_03-20-2012_14h26m45s.raw 1:10:08.5 90.43
logs\BikeBrake_03-22-2012_17h51m00s.raw 1:10:13.6 80.35
logs\BikeBrake_03-26-2012_11h08m58s.raw 1:10:09.1 92.26
logs\BikeBrake_04-01-2012_12h51m17s.raw 1:11:52.7 93.29
logs\BikeBrake_04-08-2012_12h49m27s.raw 1:10:11.8 96.27
logs\BikeBrake_04-09-2012_12h56m02s.raw 1:10:23.2 96.09
logs\BikeBrake_04-10-2012_14h00m14s.raw 1:09:43.7 89.43
logs\BikeBrake_04-13-2012_12h09m35s.raw 1:10:07.4 91.89
logs\BikeBrake_04-18-2012_16h30m32s.raw 1:10:12.3 98.31
logs\BikeBrake_04-22-2012_02h17m41s.raw 1:10:25.1 91.99
logs\BikeBrake_04-24-2012_16h13m45s.raw 1:10:08.8 93.04
logs\BikeBrake_04-28-2012_14h41m58s.raw 1:10:31.0 86.68
logs\BikeBrake_05-01-2012_13h21m44s.raw 1:26:09.8 102.90
logs\BikeBrake_05-03-2012_14h12m54s.raw 1:26:14.1 102.70
logs\BikeBrake_05-06-2012_09h04m57s.raw 1:26:17.1 103.71
logs\BikeBrake_05-07-2012_08h05m04s.raw 1:26:17.0 102.40
logs\BikeBrake_05-09-2012_19h12m18s.raw 1:10:14.4 84.59
logs\BikeBrake_05-12-2012_11h53m24s.raw 1:42:08.4 122.16
logs\BikeBrake_05-15-2012_11h20m21s.raw 1:42:18.3 125.05
logs\BikeBrake_05-19-2012_17h51m19s.raw 1:10:14.0 79.32
I think it depends on the particulars.
For instance as the poster is flying a Canadian flag I might assume they're in Canada and not Belize, so the *actual* energy required could be quite different.
After friction, belt, poor efficiency of using the treadmill motor at too low an RPM and as a generator, I'm guessing I was applying approximately double the wattage at the pedals.
Time to get modern power-meter pedals, mount them on my exercise bike to see how truly efficient my generator setup is so that I can see how well I actually performed.
Belt drive to a small (DC permanent magnet?) motor/generator like that is probably around 70% or more.
You seem to be arguing for the sake of argument to try to prove me wrong or something which is odd since it was only as an theoretical aside that I (and presumably the original poster) mentioned the possibility (not practicability or desirability) of human power.
Crosley Icyball