[MakeLV] Make Leigh Valley Digest Subject: Fans

[Josiah Ritchie]

Oh, there is a stream, but it is a good distance. We'd certainly need
some impressive pumps to get the water up the hill and lots of tubing
and insulation between the river and the building. Might also need to
check with Allentown and there is a park on the other side so
maintenance might be an issue.

JSR/

On Fri, Jun 22, 2012 at 10:45 AM, Rob Roschewsk <rob at pabut.org> wrote:
> Exactly ..... now if there was a swimming pool or stream nearby we
> could circulate that water ...... you would need to make up for the
> temperature difference in the water (stream water about 60F vs. ice
> water about 40F) with more efficient radiator .... just a simple coil
> wouldn't cut it ....
>
> But I think we're getting there ..... :)
>
> On Fri, Jun 22, 2012 at 2:39 PM, Josiah Ritchie
> <josiah at josiahritchie.com> wrote:
>> Yeah, scale was the biggest problem mentioned at the meeting last night.
>>
>> This is more like geothermal stuff than it is like a swamp cooler or a
>> traditional A/C unit. The heat being put into the coil is then put
>> into evening out the room and the ice in the cooler. In other words,
>> transferring heat from one location to another using the liquid in the
>> pipe. In my mind, the biggest problem of scale is keeping enough ice
>> around to keep it operating on the hackerspace to a point of
>> usefulness. This doesn't matter as much if you're just trying to cool
>> your bathroom I guess. Basically the cooler is operating like the
>> ground in a geothermal system. It's just a lot colder so long as you
>> keep ice in it.
>>
>> JSR/
>>
>> On Fri, Jun 22, 2012 at 10:17 AM, Rob Roschewsk <rob at pabut.org> wrote:
>>> Agree ... with what you're saying 100% ...
>>>
>>> http://www.fiscalgeek.com/2009/07/homemade-air-conditione/
>>>
>>> but I don't think this is a "swamp cooler" in that it's not using the
>>> evaporation of water to reduce the temperature ...... it's passing
>>> chilled water through a coil which air is moving over ... so in fact
>>> it should cause humidity to condense .....
>>>
>>> Problems I see are those of scale ..... water cold enough ..... water
>>> supply large enough ..... need more cow bell !!!!
>>>
>>> On Fri, Jun 22, 2012 at 2:03 PM,  <rsjames at ix.netcom.com> wrote:
>>>> Ever wonder why it is called "air conditioning" instead of "air cooling"?  A
>>>> key element of air conditioning is the removal of humidity from the
>>>> air.  That has as much to do with comfort as lowering the temp.  For those
>>>> of you old enough to remember cars from say, the 70's and earlier, the
>>>> defrosters never worked really well.  They just blew warm, moist air on the
>>>> windshields.  In modern cars, when you put the defroster on, it also turns
>>>> on the A/C.  This pulls the humidity out really fast, and the widows (all
>>>> the windows) clear up in seconds, rather than minutes.  Swamp coolers work
>>>> well in places with low humidity.  They don't work if the humidity is high.
>>>> Let's say you are in a room that is 80 degrees with a relative humidty of
>>>> 85%.  This is pretty warm, but bearable.  With the breeze from a fan,
>>>> you probably would not mind it.  Then you run your in-room swamp cooler and
>>>> knock the temperature down by 5 degrees, to 75, without removing
>>>> the moisture.  Now the relative humidity about 100%.  You will feel very
>>>> damp.  And you might even have fog!  This is not comfortable, and not good
>>>> for equipment.
>>>>
>>>>
>>>>
>>>> Bob James
>>>>
>>>>
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>>
>>
>> --
>>
>> http://about.me/josiah
>>
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