The March/April 2013 issue of Sierra (the club magazine) says wind is
now
cheaper than any other form of electrical energy generation, at
$48-95/MWH, vs
$61-89 for a natural gas combined cycle plant with 60%
efficiency or coal at
$62-141 or $200-231 for an industrial gas turbine (eg
Capstone?), IF we remove
all subsidies for all forms of generation. But
conservation and energy
efficiency are still cheaper, at $0-50/MWH.
I
use a fully-enclosed shower with a continuous 1/4 gpm brass nozzle head
and
swivel fitting from McMaster-Carr in parallel with occasional 1 gpm sprays from
a hose
with a hand valve...
http://www.homedepot.com/p/RINSE-ACE-Snap-n-Spray-6-ft-Quick-Connect-and-Detacha\
ble-Hose-with-On-and-Off-Sprayer-4170/202519744#.UeJLZTbD_IU
Drilling a hole
through the plastic disk shutoff valve in the sprayer T will
keep the 1/4 gpm
shower head going when you are using the sprayer to wash off
soap.
http://www.sunfrost.com/efficient_shower.html describes the benefits of a fully-enclosed shower.
This $9.17 nozzle uses 0.2 gpm at 40 psi with a 60 degree spray cone...
http://www.mcmaster.com/#32885k11/=nm45ot
Here's a $15.60 swivel fitting... http://www.mcmaster.com/#34615k71/=nm48wo
This uses about 5 times less water than a 1.5 gpm "low-flow" shower
head...
http://www.homedepot.com/p/American-Standard-FloWise-Single-Function-1-7-8-in-Wa\
ter-Saving-Showerhead-in-Polished-Chrome-1660-710-002/100649323#.UeJN0TbD_IU
McGill U's "Water Conservation and the Mist Experience" pamphlet suggests using a garden sprayer, eg this $8.57 1-gallon sprayer... http://www.walmart.com/ip/RL-Flo-Master-1-Gallon-Sprayer/13376324
Bucky Fuller's Dymaxion pressure mist shower used 1 pint per hour, ie 0.002 gpm, ie 2 milligpm, 750 times less than a "low-flow showerhead."
Nick
sweet!
ReplyDeleteI'd suggest a thermostatic pressure-balanced shower mixer too. They're so wonderful, and far better than thermostatic or pressure balancing alone:
http://www.lawlervalve.com/index.php?p=product&id=65&parent=53
http://webbase.ostnor.net/FMMattssonWeb/default.aspx?catName=katalogdatabas&lang=12
-mathew
mdml.co/
Looks expensive. A 2'x5'x6' shower enclosure with 2x2x5+2(2+5)6 = 104 ft^2 of surface consisting of a 5'x5' R2 access door and 79 ft^2 of R10 fixed walls with a 25/2+79/10 = 20.4 Btu/h-F thermal conductance could stay 105 F in a 70 F room with (105-70)20.4 = 714 Btu/h of heat.
ReplyDeleteIf a person supplies 300 Btu/h, the rest could come from 414/(110-105)/60/8.33 = 0.166 gpm of 110 F shower water cooling to 105 before leaving the drain, at a cost of about (110-60)0.166x60x8.33 = 4140 Btu/h.
Alternatively, a $49 digital thermostat with a 16 amp relay http://www.amazon.com/RANCO-ETC-111000-Digital-Temperature-Control/dp/B0015NV5BE/ref=pd_sim_sbs_hi_1 could run Aldi's $9.99 1500 watt 1.8 quart Crofton electric teakettle with a steam tube into a dry shower enclosure to keep it 105 F to make a steam room with about 414 Btu/h.
If the shower tub is filled with water and the steam tube enters below the water level, it could keep the tub water 105 F for about 1.8x2/0.414 = 8.7 hours (a long soak) with a single teakettle full of water.
Nick
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