Graham Chiu wrote:
John Pollard wrote:I used to live in FL and used collectors are abundant there so I might have to take a trip down there sometime.
Why is that? Don't they work anymore or have they been replaced by electrical heating?
Vulturul Ilie wrote:Heat pumps are 400 % more efficient than any induction or resistance heating .This efficiency drops if outdoor its minus 5 C but there are somme high efficient air conditioner units like Daikin wich defrost the the outdoor unit pipes periodically and these work until minus 20-25C.
One Kw of gas power( natural piped gas) its 10 times cheaper than electric where i live and even if the heat pumps( air conditioners working on heating) are soo much more efficient than electric heating,it cant still not beat the gas.
Joshua Myrvaagnes wrote:Thanks, this is awesome Creighton!
I guess the charger is not an inverter, but an anti-inverter (Ac-to DC), is its main function. My experience is it clearly heats up only when the computer battery is drawing power (charging), and it's cold when the battery is full or not connected.
I do have a solution which is kind of risky, a metal lamp...with (sorry Paul) a CFL bulb. It's protected from crunching by the lamp "shade" thing (metal), and it's worked for me. Problem was it was actually a bit too hot--I forget how many watts but it was the lowest wattage we had lying around, I used this mainly just as a night light. But even that was too hot. I want to say 12 watts. I looked for a smaller, lower-watt incandescent but for some reason I couldn't find what I was looking for.
So, the DC-DC voltage adjuster thing won't be a heat source, I take it. How does something change voltage in DC? i thought that was the whole point of AC, you can change voltages with a transformer...and I thought my computer and phone both ran on 12 volts. I guess not. Glad that there are heat blankets available to run on 12 volts already.
The soap stone trick I know, I heard of it with a brick, they teach that to kids in Vietnam that Ho Chi Minh used to take home a brick from his baking job for the night. I look forward to getting to feel it with my own hands and put a physical experience with theory. Thanks for the reminder.
Joshua Myrvaagnes wrote:Another question--I've rather come to depend on my computer chargers for heat.
1 they're warmer than an electric blanket. Even after a half hour I can barely feel the electric blanket, on top setting. Maybe it's partly broken? with all those 100 watts going in, I'm getting very little out, compared to (it says) six watts on the mac charger and nice hand-warming potential out.
2 they're placeable and localized
But--once i move into my shiny old homesteady type situation, then the electricity will be limited and these will be not an option--unless i wnat to run our battery at night to charge the computer.
My question--isn't the charger really an inverter?
so its only function is to go from AC to DC and lose a lot of energy as heat as its doing so?
In that case, if I'm on DC for all my appliances anyway (which is cell phone and computer and a few fans and lights only, maybe a few battery-powered power tools for occasional use, electric chainsaw etc.) then I don't need to invert. So I'd just plug the 12 volt cell phone into the 12v battery, same with the computer.
What if I want to arrange a targeted heat source like the computer charger?
I'm going to assume there's no good electrical solution to this, but I'd love to hear if there is something I don't know about--for example, a place where there's already a lot of heat lost in the system of photovoltaic-battery-appliance. The mac itself can heat up occasionally, but only in the summer. (the dinosaur PC heats up pretty good, but that's a huge energy hog).
Best I can come up with, plug in the energy hog into the PV panel during the day, charge its battery full while the sun shines. Then at night let that warm me up for a few minutes by sticking it under the blankets for the five minutes or so while I'm brushing my teeth and stuff. It'll probably not last much longer than that, but it'll take the edge off.
Travis Johnson wrote:I am not sure that it is a myth though, because per foot, the voltage is exactly the same allowing for almost twice the efficiency per foot of transmission line. High Phase Order Transmissions Lines have been experimentally built, and worked. At the house I would just use a transformer to get the high order phases back down to three phases as you propose.
Travis Johnson wrote:
What makes it crazy to me anyway is; it is only 3000 watts, yet single or 3 phase, and has a 4 cylinder liquid cooled gasoline or liquid propane engine. I can see a 10 kw or up unit having all that, but 3000 watts?
Travis Johnson wrote:My understanding was, 6 phase is close to being double the efficiency of 3 phase, but not quite.
Jeremy Baker wrote:Travis. Best wishes for your adventure into a new livelihood.
If the gravity feed pellet hopper experiment flops I’ll probably look at electric feed again. I saw one that is 120 VAC or 12VDC but it’s for a pellet smoker. I thought the feed mechanism might be adapted to a burn tube however.
David. Have you done 3 phase power supply with coupled inverters before? I’ve seen the diagrams in the manuals. I have two Victron Multiplus inverters. If I got a third Multiplus I could try it but what are the advantages? In reality I think Travis has a lot more need for 3 phase than I do. Due to my semi Nomadic life I’m forced to keep things simple. So I only have 3 solar energy systems currently lol. But working on a 4th system again after trading a van with one for a motorcycle.