ibis
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Post by ibis on Jul 26, 2021 22:42:07 GMT 1
This is also a good system - Evaporative Cooling Systems without over watering..
this is a good reference - PDF
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Post by houpla on Jul 26, 2021 22:58:24 GMT 1
'They' don't have electricity in polytunnels But 'we're' working on it! Even the systems of roped covers allowing the sides to be lifted in summer aren't ideal, as the heat is trapped in the top half. They do have the advantage of offering protection from fungal-disease-ridden rain, though.
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Post by houpla on Jul 26, 2021 22:59:52 GMT 1
This is also a good system - Evaporative Cooling Systems without over watering..
this is a good reference - PDFThanks for that! Interesting reading...
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ibis
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Post by ibis on Jul 27, 2021 7:15:20 GMT 1
It is possible to heat a greenhouse/tunnel during the cold months and make a profit from or break even with electricity costs.
A bitcoin miner creates about 5000w of usable, excessive heat that needs to be dispersed; so while you are heating your greenhouse you will also be mining bitcoin which as of today is reaching $39,000+ a piece. You are going to or want to heat your greenhouse; so why not pay nothing or profit from it? Well, except for the initial investment which has a pretty fast ROI and is not much more than a normal set-up.
If you are a commercial grower, then this could also lead to positive publicity for your enterprise.
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Deleted
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Post by Deleted on Jul 27, 2021 21:03:06 GMT 1
It is possible to heat a greenhouse/tunnel during the cold months and make a profit from or break even with electricity costs.
A bitcoin miner creates about 5000w of usable, excessive heat that needs to be dispersed; so while you are heating your greenhouse you will also be mining bitcoin which as of today is reaching $39,000+ a piece. You are going to or want to heat your greenhouse; so why not pay nothing or profit from it? Well, except for the initial investment which has a pretty fast ROI and is not much more than a normal set-up.
If you are a commercial grower, then this could also lead to positive publicity for your enterprise.
All a bit beyond me I’m afraid.....
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ibis
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Post by ibis on Jul 27, 2021 21:23:35 GMT 1
It will be just a normal looking, plug in or hot-wire press on-off, programmable thru your smart phone(if wanted) fan driven heater either mountable or floor mounted. Size of a small, under-unit refrigerator.
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Deleted
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Post by Deleted on Jul 28, 2021 20:54:16 GMT 1
It will be just a normal looking, plug in or hot-wire press on-off, programmable thru your smart phone(if wanted) fan driven heater either mountable or floor mounted. Size of a small, under-unit refrigerator.
Doesn’t sound just a matter of plugging in a unit according to this: www.investopedia.com/tech/how-does-bitcoin-mining-work/Think I’ll give it a miss, sorry. My toms are still hanging in there....👍👍👍
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Post by Olave H on Jul 28, 2021 21:10:42 GMT 1
No sign of blight in our polytunnel grown toms ( don't grow 'em outdoors) but slight problems with a few of them splitting due to the sudden & excessive rise in temperature. That just means you have watered them too much. No we haven't ! Check your facts.
Split skins caused by a sharp rise in pressure. However, in hot weather, when plants are using and losing a lot of moisture, the pressure variation can be much wider causing tomato skins to burst when pressure suddenly increases.
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Post by Crystal on Jul 28, 2021 21:31:13 GMT 1
That just means you have watered them too much. No we haven't ! Check your facts.
Split skins caused by a sharp rise in pressure. However, in hot weather, when plants are using and losing a lot of moisture, the pressure variation can be much wider causing tomato skins to burst when pressure suddenly increases.
If you had read the facts in the article from which you quoted, you would have realised that the 'pressure' referred to is the water content of the tomato www.tomatogrowing.co.uk/tomatoes-split I think you owe ibis an apology...
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Post by Olave H on Jul 28, 2021 21:48:25 GMT 1
No we haven't ! Check your facts.
Split skins caused by a sharp rise in pressure. However, in hot weather, when plants are using and losing a lot of moisture, the pressure variation can be much wider causing tomato skins to burst when pressure suddenly increases.
If you had read the facts in the article from which you quoted, you would have realised that the 'pressure' referred to is the water content of the tomato www.tomatogrowing.co.uk/tomatoes-split I think you owe ibis an apology... Rather than talk about apologies I think you should try & understand why temperature affects the internal pressure of the tomato.
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Post by Crystal on Jul 28, 2021 21:56:36 GMT 1
I thought that hot weather causes tomatoes to lose moisture (pressure)...as stated in the article you quoted from...but maybe you'd care to enlighten us on your theory.
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ibis
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Post by ibis on Jul 28, 2021 22:59:49 GMT 1
It will be just a normal looking, plug in or hot-wire press on-off, programmable thru your smart phone(if wanted) fan driven heater either mountable or floor mounted. Size of a small, under-unit refrigerator.
Doesn’t sound just a matter of plugging in a unit according to this: www.investopedia.com/tech/how-does-bitcoin-mining-work/Think I’ll give it a miss, sorry. My toms are still hanging in there....👍👍👍 The unit would be designed to be "plug and play"; just like your printer. (e)That is the end game and with cloud computing it is easily feasible.(/e)
A wifi connection would be needed though in addition to the electricity.
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ibis
Banned Member
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Post by ibis on Jul 28, 2021 23:11:48 GMT 1
have a search on your fav search engine -bitcoin mining and heating your greenhouse
Many people are doing this..
The heat produced from the minig can also be used to create electricity to run the LED grow lights. All in one package if need be.
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exile
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Massif Central
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Post by exile on Jul 28, 2021 23:40:27 GMT 1
I thought that hot weather causes tomatoes to lose moisture (pressure)...as stated in the article you quoted from...but maybe you'd care to enlighten us on your theory. I have not seen tomatoes shrivel in the sun and the skin start to go wrinkly - although if picked and left in the sun that is what happens. I have however seen the leaves become very limp in hot weather and if under watered. This suggests to me that the water in the fruit is largely locked in and once in does not easily flow back out. If hat is the case then an increase in temperature will cause the water to expand and th pressure inside the fruit to increase.
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ibis
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Post by ibis on Jul 29, 2021 0:23:26 GMT 1
It could also be at the nutrient or genetic level but over-watering is the amateurs first culprit.
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