tel jetson

steward
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since May 17, 2007

zone 7? 8?: woodland, washington and portland, oregon. grower, builder, beekeeper, engineer.
woodland, washington
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Recent posts by tel jetson

this is increasingly an issue. enough so that large operators are starting to refrigerate their colonies over the winter to postpone brood-rearing.

I've got some opinions about how best to address it, but I'll keep them to myself for now.
1 day ago
is the wall that the river flows over man-made? is it a dam? what's above it?
3 days ago

Chris rain wrote:The common problem with the few that have showed them was that the combs are tricky to handle, and heavy.  But good point, maybe that is less of a concern than experimenting with split top bar, or less than half a barrel!



I wasn't suggesting that it's a bad idea to reduce comb size. it's a good idea sometimes. folks use shallow supers, for example, because they're a lot easier to move around as a whole box. even a big single comb won't be too heavy, though.

you will want to make sure that the top bars are very stout and don't bend under the weight. bending can be disastrous, as it will lead to the comb unzipping from the top bar either inside the hive or when you remove it for harvesting.
6 days ago

Chris rain wrote:The reason I wanted to split down the length is to reduce the comb size, and weight.



and why do you want to reduce comb size and weight?
6 days ago
what's the motivation behind the idea? maybe we can brainstorm some other ways to accomplish what you're after.
1 week ago

Kelly Pakes wrote:How in the world are they going to inspect the beehives in the building in that video? Aside from the logistics of even opening a box and pulling frames, it is dark, and imagine the cloud of angry bees in that enclosed space. Yikes. It did not look like it would have anywhere nearly enough ventilation, either.



there's a long tradition of keeping bees in a similar arrangement in Slovenia. there are some drawbacks, but it can work very well.
1 week ago
I believe that brood nests are approximately spherical in shape, so the smallest dimension of a hive sets the limit of a brood nest size. cutting the barrel in half like that would dramatically decrease the size of the brood nest, which would then limit the rate that bees are born and replaced.
1 week ago

S. Bard wrote:Any chance you could help me crack the numbers on that calculation? Could you perhaps explain what variables I’d need to measure in this situation, so I can take them as exactly as possible next time I go out to the site.



sure. might have to dig my hydraulics textbook out, but I'll give it a shot when I find a few minutes.

S. Bard wrote:As for your link to the direct hydro power: I did consider that option if hydro-electricity turned out to be a dud. In fact I was considering powering a pottery wheel with it if nothing else was possible. I throw a decent pot!
The shaft of the wheel comes out into an area that needs to be used as a living space, so we can use a small area to dedicate to some sort of use for the wheel, but we can’t install a sawmill for example.



it should be relatively simple to use the same turbine for electricity generation and mechanical power if you ever want to go that route. your turbine will take up much less space than the water wheel, so you'll have much more flexibility for placement.

which reminds me: if you want to maximize hydro resource, consider putting your turbine toward the lowest part of your property. there are obviously some advantages to having it near or in the existing house, so you may not choose to put it elsewhere. it's at least worth considering.
1 week ago
this looks like a lot of fun. I agree with the others: water wheels are beautiful and have a lovely nostalgic effect. they aren't the best for maximizing your power, though.

55 feet is a lot of head. a bigger pipe will have smaller head loss, though it will also be more expensive and difficult to work with. avoiding sharp bends will also help. if you want to calculate this stuff exactly, you can do it with the Darcy-Weisbach equation and a Moody Diagram. the Hazen-Williams equation is quite a bit easier and probably more than accurate enough for your purposes.

in case you don't have enough dreams already, consider direct power, too: https://www.lowtechmagazine.com/2013/08/direct-hydropower.html
1 week ago

Jay Angler wrote:Cloud cover vs no clouds appears to make a difference of 4-6 C in the overnight lows where I live, but we get a lot of "ocean effect" mixing in with that.



to make that slightly more technical, water vapor is opaque to an important band of infrared radiation, so the higher the humidity, the more heat energy is absorbed and re-emitted back at the ground.
1 week ago