On 25/08/2020 19:48:52, wrote:
On Tuesday, 25 August 2020 15:00:49 UTC+1, John Rumm wrote:
On 25/08/2020 01:47, tabbypurr wrote:
On Monday, 24 August 2020 23:16:30 UTC+1, John Rumm wrote:
On 24/08/2020 02:47, tabbypurr wrote:
On Monday, 24 August 2020 02:32:40 UTC+1, Fredxx wrote:
On 24/08/2020 02:02:46, tabbypurr wrote:
On Sunday, 23 August 2020 16:51:48 UTC+1, Fredxx wrote:
On 22/08/2020 23:26:37, tabbypurr wrote:
On Saturday, 22 August 2020 11:58:39 UTC+1, T i m
wrote:
On Sat, 22 Aug 2020 10:46:34 +0100, newshound
wrote:
On 21/08/2020 20:55, tabbypurr wrote:

Why use ac when you could use a swamp cooler?

UK weather?

It's as if someone has heard a name and then
thinks it's going to be a solution everywhere, like
'WD40'. ;-)

If 'swamp coolers' actually worked here (with our
humidity), I'm guessing we would all have them by
now and we obviously don't, well, unless you
actually wanted a humidifier. ;-)

Cheers, T i m

I use a crude swamp cooling setup here when it hits
heatwave. It works and costs near nothing. We did
have 2 or 3 days when it was raining real hard & you
don't get significant cooling, the rest of the summer
it's good. And no, it doesn't make indoors any
damper.

Yes it does.

The humidity increases, actually making it more
difficult for sweat to evaporate.

On paper, yes the temperature has dropped.

Which part of 'And no, it doesn't make indoors any
damper' was beyond you? Lemme give you a hint: the way
the system works means it does not add water to the
indoor air, and does not make the place damper. Are you
able to comprehend that yet?

What part of a "crude swamp cooler" passing air over water
that enters the room, making the room air moist don't you
understand.

I didn't say the water vapour entered the room

Yes there are evaporative coolers that can work effectively
and using heat exchangers, but a "crude swamp cooler"
doesn't,

bzzt, wrong answer

and by the very nature of reliance of evaporation
increases humidity.

somewhere yes, where is controllable. It need not be indoors

Or do you think the water vapour magically disappears?

Get back when you're willing to stop being an idiot

So out of interest how does your swamp cooler manage to
separate the cooled air from the humified air? Does it have an
air to air heat exchanger and secondary fan (or at least air
path)?

If one were to install something, what I'd suggest considering
is passing (incoming or recirculated) air through a pipe covered
with shaded wet soil. All you need is a fan, and you get a little
cooling for your 20-40 watts. With other basic heat preventing
measures such as shading this can keep a house pleasant at
trivial energy use & cost.

The UK really is not hot enough to need refrigeration ac.

In your humble opinion obviously...

What I do here (in heatwaves only) is far cruder. The flat
roofed extension, despite being fully insulated, is like an oven
in a heatwave. Flood the roof with water & that effect stops. It
no longer heats some of the rest of the house. It could hardly be
simpler, and no, no water vapour is added to indoor air.

So is that what you meant by "I use a crude swamp cooling setup
here when it hits heatwave"?

I also use differential thermostat controlled ventilation -
that's my main go-to. When it's cooler outside, ventilation runs.
It cools the masonry over a period of hours, leaving the house
cooler through the next day. 20-40 watts cools by a varying
amount upto 6C. In the first property I did this, due to poor
building design it gave over 10C improvement.

After this year's heatwave I think it's time to consider
installing some sort of automated & permanent swamp cooling. The
variations & permutations are numerous.

And yes, swamp cooling is effective.

But not for doing many of the things that people buy AC for.

More to the point, in the form that many people experience swamp
coolers (i.e. COTS evaporative coolers, wet towels draped over fans
etc), they don't work very well in our climate.

Installing ac in the UK has such downsides that really it just
shows a lack of comprehension of the situation.

And yet so many people do it. Perhaps they have heat generating
equipment that can't be turned off. Perhaps they have medical
conditions that put them at risk in high temperatures or high
humidities, perhaps they want better productivity from their
workforce and have found that keeping them cool and comfortable
pays for itself many times over.

There are many houses designed or retofitted to stay cool in hot
climates without ac. The technology is known. AC is not required even
in hotter places than here.

Yes, typically in places where night temperatures drop close to zero. In
all hot humid places traditional AC is used.

People use it as a knee jerk reaction to excess heat due to a
complete failure to understand the available technologies or even
quite basic aspects of the situation. Even my very simple
differential thermostat system is beyond the grasp of most, why I
don't know but it certainly is.

I'm going to bite, how does having a differential thermostat assist in
cooling a room?

They think that any time the fan isn't running it's not cooling, the
fan should be on!

That might be because the passing of air, even if hot and close to
saturation, can create a real cooling effect on skin. Fans tend to
assist this and why I use a fan in my office on very hot days.

You can remain in your seemingly constant state of denial.