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yes but in a sealed system the oxygen is consumed by the corrosion so the corrosion must stop.
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AFTER HOW MUCH CORROSION - PERHAPS IT'S THEN TOO LATE!
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Wow! That Solar heating WVO post has attracted a few hits. An update...Well, the 'ol solar panels are still working fine at heating up the WVO (up to 450 litres). Had to replace a few of the 55 watt pool pumps that circulate the oil... most of them are cheap plastic things and the mounts eventually break...otherwise things are going well. Er.. I had to replace a panel when a cow trod on the glass and smashed it!!
I highly recommend used solar hot water panels for heating oil. Very efficient and cheap! Scube |
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Hi Scube,
Great to hear that someone out there realized tapping the sun's energy isn't that far off into the future. I just took a class on solar, and I am really stoked about designing a solar heater to run the biodiesel reaction. I was hoping you had the time to answer a few questions for me... What model solahart are you using and what size? to heat that many Liters of oil, i'm guessing quite large 4-5 m^2 range? Are you still using Veggie oil as the heat transfer fluid? Does the system automatically turn the pump on to maximize heat gain? or do you do it manually? How do you maintain the reaction temperature throughout the reaction period? I will probably have more questions as I delve into designing a small scale solar heated system. Anyone else out there working on such things? Thanks!! Solar for the win! ~Ryan Chemical & Energy Engineering -- The Pennsylvania State University |
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Hi tokashila,
Ok I can answer some of those questions right now, the others I will have to get some more info for you. What model solahart are you using and what size? to heat that many Liters of oil, i'm guessing quite large 4-5 m^ Don't know the model, have to check. Using two panels- 4 square metres is prob right. Scube Are you still using Veggie oil as the heat transfer fluid? I am circulating the vegie oil directly through the panels to heat up the oil for the reaction. if that is what you mean then yes! Does the system automatically turn the pump on to maximize heat gain? or do you do it manually? The system is simple, no automatic pumps or anything. Sunny day and i want to make some fuel, I go and turn on the pump in the morning. Oil is circulating and heating up. I leave it for 3 or so hours and feel the side of the tank to see how hot it is. How do you maintain the reaction temperature throughout the reaction period? As soon as the oil is drained out of the storage tanks it is losing heat so I basically prepare to make the fuel as soon as I drain the tanks into my reaction vessel. I should get around to posting some photos eh!! |
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scube,
"on a cloudy day it took 3-4 hours to heat 250 l to 50-55ºC" what time of the year and what is your North or South latitude? And did you ever measure the size of the panels? You need to be aware that copper catalyzes the oxidation of points of unsaturation of the fatty acid chains. Best regards |
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I am looking to build a WVO/UCO solar heater on top of our shipping container. The pipe work will be 1" black Polyethelene with fussion welded joints. The box structure will be painted black with perspex front. The whole unit will be conected to the bund so that should the pipe burst the spill would be contained.
slabs Home of Good Biodiesel http://www.cambridgebiodiesel.org 2000 Vauxhall (GM) Combo now with coolant type fuel heater. Veg oil blends 1996 VW Passat 1.9 Tdi. VP37 under repair. Single cyl Petter diesel generator powering tokheim forecourt pump. |
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I have been thinking of making a solar pre-heater using an insulated box mounted to the side of my shed, facing the sun, with double pane glazing. The oil would flow through 3" black plastic sewer pipe, and the interior of the box would also be painted black to attract heat. I would install this between my initial settling tank and processor, and size it so it would hold enough oil for a batch.
Will it work or will I have problems with the sewer pipe? Jeff 1995 F250 4x4 Powerstroke 2000 TDI Beetle 1982 300D project |
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Is there some reason you keep posting the same sort of completely irrelevant and useless comments?? Looking up your posts, all you have been doing is making the same kind of comments over and over which are becoming idiotic through their volume and irrelevancy. Perhaps you are practicing to become a full blown scammer or something? I would suggest you either contribute something useful or don't say anything at all. **** * 1978 Merc 300D. Running Blend and 2 tank system with Home Made HE and water injection. |
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Solar powered motion sensor lamp
Solar power is a clean and ecologically sound alternative to electric, battery and other sources of power. There is no pollution produced, no non-renewable resources used, and it costs far less than other power sources. Even if you don’t choose to use solar power for all your household needs, you can still help the environment by choosing solar motion lamps . Every small bit of solar power used decreases the worlds usage of less ecological methods. The principle of work for solar motion lamps: solar motion lamps work by collecting solar power during the day through solar cells located on the light. This solar energy is used to recharge a battery (usually a NiCad rechargeable battery), which in turn powers the lamp at night. solar motion lamps usually use a strong LED lamp. LEDs are an excellent choice for solar lamps because they use far less power than traditional bulbs and halogen lamps. The application of solar motion lamps: solar motion lamps are built with weather resistant materials, so they can be left on your homes exterior in all types of conditions. Some models of solar panels include solar motion lamps that are strong enough to collect energy even in overcast conditions, making the lamp even more useful. You can set the duration that the lamp shines when it detects motion (any where from 0.5 minute to 3 minutes), as well as being able to position it so that it can detect motion up to 90 feet away. The trigger for the motion lamp is a passive infrared motion detector that is safe for use around all people and animals, and does not require additional high tech equipment. solar motion lamps are an excellent way to keep your home and property safe from intruders and other problems, all while being cheaper and more green than other choices. You also have the choice of mounting your solar motion lamps on a post (this will be provided) or on the side of your house or garage. If you need just one or many, the solar powered versions of motion lamps are the easiest choice for your lighting needs. www.sunnybp.com |
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What has this dribble about "solar motion sensors" got to do with heating WVO with the sun??? Anway, anybody that thinks that "solar" products are environmentally friendly and somehow "save the planet" needs a brain transplant. Either that or join those other idiots like Barrak Osama and Kevin 747 Dudd. |
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DCS, Sorry to appear confrontational, but just what is your problem with Stellar ? He/She appears to have posted just three times since signing on on the 19 march this year. None of the posts are in any way offensive or abusive. If you don't like the posts, don't read them. dva |
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Junkman.
I would suggest using metal pipes instead of plastic. The heat transfer is much better. dva |
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G-day Junkman,
Further to DVA's post above I'd be concerned that your plastic pipes may "melt" if you did receive any significant heat from the sun. Metal is better (but not copper). Peter |
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