[time-nuts] Cheap Rubidium

Sat Dec 26 15:38:06 UTC 2009

2009/12/27 Bob Camp <lists at cq.nu>:
> Hi
>
> Around here when you drill a well, it's often unclear exactly how deep the water is *really* coming from. I think that anything that's safe to drink will be pretty constant temperature at the source. A typical well system here pumps the water into an above ground holding tank to keep the pump from running each time you wash your hands.  Since the pump is a non-trivial energy load that makes sense.

Once the bore is drilled to below the water table, a pipe is lowered
down into the hole and attached to the pipe. Assuming that once the
water table is reached, there is still water below this point, the
water should be coming from the point level to where the end of the
pipe is, as this source has the highest pressure.

Indeed, well pumps do feed large storage containers for this purpose,
with some of them perched seeming precariously high up on towers to
obtain the pressure required. Living next door to a large concrete
storage tank full of water and standing on tall wooden trestles in a
land that is prone to earthquakes and volcanoes is quite interesting.

It is a trivial task to tap off some water coming straight from the
pump in these setups but would require the pump to basically cycle
continuously. You could put a smaller continuous duty pump T'd into
the well pipe for this cooling application but this starts to get
complicated and expensive.

> I suspect that the same thing would get you using a deep well for geo-thermal.

Up in Rotorua in the North Island, the Earths crust is very thin there
and the extraction of geo-thermal energy is widely used. If you ever
come here it is a definite place to see and you will soon get used to
the very pungent smell of hydrogen sulphide in the air for the
duration of your visit. To see steam coming out of cracks in the road
and the storm drains is a sight to see. If you visit the Maori village
you are presented with a cemetery with steam coming out of the
monuments, quite a disturbing sight. Just don't fall into the boiling
pools there or you will be poached, as some visitors have discovered.

73,
Steve

> Bob
>
> On Dec 26, 2009, at 5:52 AM, Steve Rooke wrote:
>
>> Hi,
>>
>> In most rural or semi-rural areas over here in Canterbury, New
>> Zealand, water is provided by a well on the domicile section. Wells
>> are drilled into the natural aquifer formed by volcanic ash which we
>> live on so it is relatively easy to create a bore hole and take
>> advantage of the naturally filtered water from quite a distance below
>> the surface. I wouldn't mind betting that this water comes out of the
>> ground at a very constant temperature season by season and the amount
>> needed to flow over the rb heatsink to hold it steady would not be so
>> great as to be able to be wasted back into the drains.
>>
>> Ths would save all the messing about pumping water down into a bore
>> and pumping it back up again. Although I appreciate that not everone
>> is in the position to do this but some may already have a water supply
>> like this, even for garden irrigation. When I lived out in the sticks
>> I had reticulated water on the drip for the house uses but my own bore
>> for garden irrigation.
>>
>> 73
>> Steve
>>
>> 2009/12/25 Bob Camp <lists at cq.nu>:
>>> Hi
>>>
>>> Actually burying a recirculating loop might work pretty well. The gotcha is that going much deeper than 18" would require significant amounts of blasting powder. I suspect the neighbors *might* object ....
>>>
>>> Bob
>>>
>>>
>>> On Dec 24, 2009, at 3:32 PM, Don Latham wrote:
>>>
>>>> Actually, couldn't you just squeeze your fish before you eat it? Should
>>>> have a lot of mercury in notime, according to the scaremongers.
>>>> Also, consider a heatsink buried about 10-15 feet deep. The temperature at
>>>> that depth in the ground does not vary very much at all. The trick to all
>>>> of this is to have a heatsink/source at a constant temp somewhere...
>>>> Merry Christams to all the nuts!
>>>> Don
>>>>
>>>> Bruce Griffiths
>>>>> Magnus Danielson wrote:
>>>>>> Bruce,
>>>>>>
>>>>>> Bruce Griffiths wrote:
>>>>>>> At your location, at present, it wouldnt be a significant problem as
>>>>>>> long as the basement was unheated.
>>>>>>
>>>>>> Depends. But having 3 dm snow on the ground helps to keep the ground
>>>>>> around the house warmer, as it will insulate against the cold of the
>>>>>> open sky. -12.8 C is the lowest so far. Since winter is reoccuring, we
>>>>>> build the houses accordingly.
>>>>>>
>>>>>>> Also good ventilation would help, together with a thin layer of oil
>>>>>>> on top of the mercury.
>>>>>>
>>>>>> Mmm. Yes, didn't think about covering the baths with fluids.
>>>>>>
>>>>>>> The biggest obstacle would be the cost of the Mercury.
>>>>>>
>>>>>> Actually, it could be an obstcle just obtaining in those amounts it
>>>>>> here within EC, so it would involve some form of approval of some form
>>>>>> of excempt since it is mercury is a ROS element.
>>>>>>
>>>>>> Cheers,
>>>>>> Magnus
>>>>>>
>>>>>>
>>>>> Guidline price is around $US600/flask (1 flask = 34.5kg).
>>>>> Thus cost for 145 ton would be around $US2.5million.
>>>>>
>>>>> The Canadians have a liquid mercury mirror telescope about 6m in diameter.
>>>>> Whilst this doesn't use 145 tons of mercury the surface area would be of
>>>>> the same order.
>>>>>
>>>>> Bruce
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>
>>>>
>>>> --
>>>> Dr. Don Latham AJ7LL
>>>> Six Mile Systems LLP
>>>> 17850 Six Mile Road
>>>> POB 134
>>>> Huson, MT, 59846
>>>> VOX 406-626-4304
>>>> www.lightningforensics.com
>>>> www.sixmilesystems.com
>>>>
>>>>
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>>>
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>>
>>
>>
>> --
>> Steve Rooke - ZL3TUV & G8KVD
>> A man with one clock knows what time it is;
>> A man with two clocks is never quite sure.
>>
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>
>
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-- 
Steve Rooke - ZL3TUV & G8KVD
A man with one clock knows what time it is;
A man with two clocks is never quite sure.