It is an interesting these technologies you compare. Yes, a sand battery is in potential capable of storing higher temperatures if the source can generate these temperatures. We also have to look at the heat transfer that will seperate both energy buffers if seen from an application point of view. The heat transfer in sand is very low and this intrinsic insulation of sand begins to be very interesting when larger volumes are used. Water has a problem that it needs an extra insulation layer and larger volumes would be less interesting in comparison. However water is faster in exchange and is interesting as smaller buffer with shorter bursts and intake of heat.

Working on irrigation to all corners of my piece of land. Digging meters and meters and putting HDPE pipe connectors with water sockets. Digging is heavy work but I needed a workout actually

I perhaps can help you with this. I'm working in a company that is helping smallholder farmers over the world to increase their crop yield. We used to start with a small hydropowered waterwheel but moved to solar due to the reach of the sun. I am the technical person that is sourcing pumps, solar panels, inverters etc for irrigation.

So far as I can read your question you don't need a lot of water and also not a lot of pressure. It is quite easy to calculate.

• Hydraulic power need (W) / efficiencies = electric power requirement (W)-> *1.3 = solar panel (Wp)

• Hydraulic power = 9,81 * height differencence of water (m) * liter per second you want to pump

• Efficiencies = centrifugal pumps are approx 35% eff so (hydraulicp/0,35) *1,33= panelsize

• halve a liter per second is sufficient for halve an acre (2020m2) of crops.

Please if you have more questions I would glad to be of help

Glad to be of help. I think you can get away with a 12v pump as most panels of this power range are made for 12/24v. I suggest very simple centrifugal submergable pump with a bit of filtering around it and direct connection to panel. No inverter or battery, that would be way overkill in my opinion.

As an example case, if you need to pump from the pond nearby, 2m height difference and pump 0,25liter per second. ((0,25 *2 *9,81)/0,35)*1,33 = 18,6W ->20wp panel. I did not take into account the hose size butn0,25liter per second is not a lot. And every meter height difference added will add an extra 10W to the panel

I have studied the drying of fruits for my work. To get optimal drying the temperature should be 45-60degC with an airflow in it. Of course this design would work but the fruits will take 3 days before the moisture content is around 10%> The design would need a bit more solar surface and a small fan to make the evaporation go faster and exchange the humid air. But it will be a bit more complex though. Small chimney would also work

I am getting the same issue. Also have my current system in solar shed (3m3) and want to upgrade. It cools off here in winter -20. An idea would be to have at least an insulated space + exhaust fan on too high temp and two series places h4 headlights (=48v) switched on below 0 and turn off at 2 ( how?) would give enough heat to heat the insulated space. I am struggling with the triggering though. Also there are heat mats for ea seedling heating or pet heating. How to switch on/off though. I use home assistant at home but its way too bulky for a "thermostat switch". Only if i could find an old refridgerator for the switch.

They were not dying to find out, I hope?

Thanks of sharing your information. I was a bit frustrated but I would expect you also were last month. The spool that I bought new, could have been in a place where it could be moist. I'm not sure what the plastic is but if it's nylon it can absorb quite some moisture and then the yielding strength will drop? After I had changed the original spool with the spool with previous breaking cheap wire, it went better but could not get my finger on why. Perhaps the hole has been worn out.

Your suggestion of another trimmer head I will look into. The trimmer start to vibrate more so I'll check the bearing and see if the trimmer is disassembable (if that's a word)

Indeed, the man is painting the grass green.

I tried the same with a low cost grill iron ( to make sandwiches 🥪). With back in my mind that I not would buy another one but fix this one once it should break. The hinge broke and a few tabs that hold oneside metal in place. I glued it but after two weeks the it broke on another place. Could not live without tosties, have now a newer bigger one...I've tried...

For work in Malawi I am thinking of introducing a bricket press to make brickets from biomass. One person must pull a lever and a piston is pressing biomass into a cylinder and compresses it. The end of the stroke should be stronger and less fast. And with returning of the lever the pressed bricket or pellet is pushed out and new biomass is inserted. It can be an interesting design from scratch and nice context? It would be challenging to make it convenient for the person while large pressing forces are reached (5000n)

Very interesting. I always look into this opensource flowbatteries as I recognize the advantages that are discussed in the video, easy scalable, cheap, safe and probably diy-able in the future. I would like to experiment with two IBC's in scale. Following the FAIR project as well. Thanks PoVoq

So sad, there is nothing but contempt for life.

The summary pictures below

Good job @hamtron5000, you need to place the cats somewhere 😁. We also built a cat collector last month. The trick with us was the stovepipe that did not allow combustables nearby so the pathway is very small for the cats

And there are a lot of these bikes! Sorry just read the post as it was snowed under by other subscription channels that are mass messaging.

Installing electricity lines are always finicky and cost me also a lot of effort. I understand your procrastination. Last week I have separated installing electricity lines by one line per evening (really one box and a line + the other side button/socket). And this helped greatly in overcoming the great effort of fixing stuff after work and dinner. The streak eventually ends and this week Factorio had me snatched up unfortunately.

Nice to see another project of you. I'll post my chicken coop project in near future as well

Very interesting read. Time to make these sensory excursions open for public to understand the clouds physical existence.