Wool shrinks due to mechanical action not temp so any agitation causes
shrinkage. YMMV depending on the knit of the fabric.
I occidentally put a hand knitted jumper in once and when it came out it
was doll clothing sized rather than a 12. That was a 30C wash but the
synthetics setting. Daughter was not pleased.
Normal cycle alternates between rotating the drum slowly and pausing to
tumble the wash, I use a cool synthetic was for most things and a hot
cotton wash for towels, and never have a problem with the machine
getting mould or smells or whatever.
I'd never used wool mode before, until I noticed non-iron shirts suggest
being washed on wool mode, so I did. It turns out the wool cycle
rotates drum very briskly non-stop, no doubt to "pin" the load against
the drum and stop it stretching etc.
However the brisk rotation manages to dislodge *so* much fluff from
between the inner and outer drum it absolutely coated the shirts ... I
tried running several full or empty washes, boil wash, with or without
washing machine cleaner and/or detergent, probably 10 washes in total
and I could *not* stop the wool cycle from dislodging this fluff - hence
I just won't use it again.
The suggestion was that people with solar panels on their roofs might
also install storage batteries that would not only store excess solar
power generated by the householder but also excess grid power when the
wind was blowing strongly*, and feeding that power back to the grid
when the wind wasn't blowing etc.
It has been discussed here recently.
These batteries would presumably be much like the Tesla Powerwall
http://tinyurl.com/h7juart although at a miserable 6.4kWh that example
is pretty useless for anything much. But Tesla are now offering a
bigger battery for their cars, at 100kWh, http://tinyurl.com/zvb2byy
so assume the Powerwall may eventually reach that capacity.
There are approximately 900,000 solar installations in the UK,
although by no means all are domestic http://tinyurl.com/j7cypmt .
Call it 1 million for simplicity and assume they're all domestic, and
that all those installations have a 100kWh battery. That gives a total
battery storage capacity of 100GWh. Assume the average UK grid
consumption across the year is ~33GW. So these batteries would keep
the UK's lights burning for ~3 hours on average, assuming no other
sources of electricity. On a cold windless winter night grid
consumption will be higher and they'd certainly all be flat by the
But they'd possibly be useful for smoothing out the peaks and troughs
caused by variable supply, along with load shedding, smart devices etc
as discussed in this thread. But there would have to be a massive
increase in numbers and/or battery capacity for them to act as primary
Wind and solar are complimentary across the year. Solar is useless in
winter but wind performs better, especially offshore. Wind drops a bit
in summer, and solar picks up a bit. Capacity factors, aka load
factors (why can't they just call it efficiency?) for 2015 as follows:
Q1 % Q2 % Q3 % Q4 %
Offshore wind 46.7 33.4 30.4 50.9
Solar 6.6 17.8 14.5 4.4
From http://tinyurl.com/hgre2bk Table 6.1 p.51
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