Water Heater Idea?

Hia! Would this work. I have a lava lamp base, which heats up (I think its a heat lamp). If i made a platform and put a metal kettle ( Hey! That rhymes!) on top, would it heat the water up? hat about other food uses for one? Thanks!

Question by Warlrosity   |  last reply


12v solar to heat water

Im looking to install a hot water cylinder with a 12v immersion heater powered by solar panels(to add wind later) to my hot tub. the idea is to either heat the whole thing all the time or to at least reduce my power usage on the heat side of the running cost. has anyone done anything like this and have any advice? the basic install idea i have is, solar panel/s to a controller controller to a battery controller to immersion heater was also thinking of installing a normally open relay onto the stat of the heater so when it is at temp a fan heater would kick in, but that would be a later install if the water heating would work. any info would be great, if i get enough info i will be doing this and making it into an instructable to further help adopt this to work better. thanks....

Topic by gareth.collier.1985   |  last reply


How to setup heating element to heat 2 gallons of water?

Hi All, I have a thought on something that I'd love to build, but I'm having some trouble figuring out the best way to do it.  I'm new to everything electricity, so please bare with me on my lack of knowledge on the subject. What I'm building is a coffee maker that you can take with you as you leave the house.  I need to figure out how to create a way to heat up the coffee to roughly 60-80 degrees, then once done you can detach it and take unit with you.   Now, here is the catch.  I don't want to rely on the battery source to heat the water, ideally I'd be able to setup a removable plug that both charges the batteries and heats the element that gets the water up to 60 degrees while plugged in.  Once the water is heated, I'd then like the ability to detach the cord, and you can take the coffee maker with you.  The batteries at this point just need to keep the water warm/hot, not heat it from scratch.   Also, I'd like to figure out how to have a timer on this with an LCD screen.  That way, just like with any coffee maker, you can set the time before you go to sleep and have it ready by the time you go on your commute. Any help on how I should set this up, battery sizes, places that I can find parts I would need would be a gigantic help!  I've been searching the internet for a few hours but cannot find anything. Thanks in advance.

Question by mgallo121   |  last reply


Solar Water Heater?

Does anyone know where I can find a solar powered water heater? I have an outdoor kitchen & would love to have heated water. Small size-under 15gl would be just great. Thanks-txrosee@yahoo.com

Question by txroee   |  last reply


Creating Multi Source power to store in batteries and convert for home use

 I am planning on using multi source electricity producers to store in batteries and convert to 110/220 AC for home use. I am going to set up as many generators as I can, including solar panels, wind generators, water flow generators and heat flow generators. I am building an underground storage room for the batteries. What would be the best batteries to use? What do I need to be able to use my generators to charge the batteries (I am thinking I will need a separate battery charger for each battery, but what do I need between the generators and the chargers?) and then how do I convert the DC to AC and hook it up to the house? As I will be doing this a little at a time, we will be using electricity from the power company at the same time. As we save money on the electric bill with the power we supply, we will expand our own generation of power, until we no longer need to buy electricity. Thank you in advance, Michael C. LaMay

Topic by MichaelL255   |  last reply


Collaberation Home Heating Effort

I'd like to start a collaborated effort for alternatives to heating a home for this winter. With the rising costs its all on our radar. Right now I'm looking at a solar air heater Solar Heater to make full instructions plus cost effective. I want to be able to do a water solar heater also but don't quite have the knowledge on getting something together. Possibly also other alternatives. Alternatives such as a permanent mount, portable, and all season benefit. Anyone up for it?

Topic by oddie1212   |  last reply


anybody using on demand hydrogen to heat hot water?

Hello all - I am interested in either converting an existing gas-fired hot water heater to burn homemade hydrogen gas, or building an on demand heater powered by same. Is anybody doing this? What are the issues, beyond safety of making your own highly flammable gas? lol... I am thinking jet/hole size on the gas burner ring for efficiency considerations, corrosion issues, etc..... THanks in advance... Matt

Topic by concreteblue   |  last reply


How to manipulate heated plastic water/pop bottles ?

I want to make flowers out of plastic water /pop bottles but not sure what heat source would work best nor what shaping tools would work best to create shape and curl.?

Question by fun2do   |  last reply


how can I heat my water for the home with flu pipe?

I have about 6 foot of single wall flu pipe from my wood heater to the ceiling where it gets into triple wall.I want to wrap coils of 3/8 or 1/2 copper pipe around single wall to get hot water free. Now how would I connect it to my existing hot water heater? Or I can put a 2nd tank outside insulated horizontal and let the water gravity feed into the bottom of the copper coils...would the heat fron flu pipe cause the water to rise up and out into the outside tank?what about the supply of water to the outside tank? concerned about pressure back to water supply line...could use check valve i guess.This system sounds like it should be simple but just want to construct it right and safely, please help thank you so much

Question by rockytop44   |  last reply


How might I heat a basement space with solar heated water running through radiant underfloor tubing?

I live in the northeast and have a basement meant to be used by the kids as a hang out and studio space. It's cold. I'd like to heat it cheaply and environmentally. My preference is to use radiant floor heating with hot water supplied by a solar water heating system. I need to build both. I've seen great ideas for heating the ground and upper floors but I'm snagged on how to adapt any of them to a basement space. Oh, and I have practically no budget at all - tubing to be purchased but most everything else scrounged/salvaged/adapted. Any helpful suggestions?

Question by vexx2   |  last reply


Can I combine my oil-fired forced air furnace & oil-fired domestic hot water heater? And then tie in solar heated water?

Currently, we have an oil-fired forced air furnace and an oil-fired domestic hot water heater.  I would like to combine the domestic hot water heater and the furnace somehow so we can heat them both by solar heated water from a panel on the roof, and use oil as a back up fuel.

Question by cscott2008   |  last reply


Water rocket plastic fusing

Hi, I'm a senior in a physics class.  We're currently building and launching water bottle rockets.  Our teacher told us of people that had tried to put two bottles together to increase the pressure they could build up, but said that they had failed because the pressure would leak from the point where they were joined.  Does anybody have ideas on how to make a water-tight double bottle rocket?  I had the idea to fuse the plastic together using heat, but I'm not sure how well this would work. This is my first post, so I'm hoping this is the right section to post in.  Thank you for any help and comments you could offer.

Topic by kemosabi4   |  last reply



Solar Hot Water Preheater Idea?

Hi everyone, I'm new, from the UK, I will shortly be moving into a static caravan/mobile home on family land for a few years to save up, so with money saving being the aim, I'd like to run this little project by you all.  I'm thinking about making a solar collector and placing it on the roof of the home, as large as I can afford (caravan is 12 wide) and feeding that into a heat exchanger inside an old 47kg LPG gas cylinder (I have access to several old cylinders and believe it can hold around 110 litres, so could even use 2?) and having the mains inlet at the bottom and outlet to the boiler at the top.  For the heat exchanger, I'm thinking cut both ends off and drop a coil through from top to bottom and weld back up but i'm open to suggestions. I want to a heat exchanger instead of having the mains water go round the solar collector, as it can get cold in the UK at night, even in the summer and I dont want it freezing in the winter (i'll have enough worry of water pipes freezing anyway), so will use some form of copper friendly anti-freeze. I'll need a pump for this, as the collector will be on the roof, above the cylinder, so thinking to run it on a light sensor, but how complicated would a thermal switch be, so when the temp in the collector ir warmer then the cylinder be to make? If anyone knows of a  place for the circuits (or of the shelf product), I can see if it's something i'm competent enough to take on.  One last thing, Would having the cylinder painter black and left in sunlight be a good idea. Would it get hot enough to cause problems with the water mains pressure?  Look forward to your feedback and advise.  Tuns

Question by tuns   |  last reply


How do I hook my gas water heater to a wood stove safely?

I heat my house with a barrel stove(w/plenum surround) that is in my basement. My propane water heater is 3 feet away and I wonder if I can add a coil of sometype and connect to the water heater and be able to control the water temp. Are there any plans out ther? Thanks for your help, David

Question by    |  last reply


What is the fastest most energy efficient way to evaporate seawater on a small scale and collect the salt that reminds?

I tried standard sun evaporation in trays (1 gallon) and it takes far too long (not to mention all the debris that collects in the water during the evaporation process). Heating it over the stove uses too much energy. I am thinking a solar fan / heat combination. Your thoughts? (Note: The goal is to collect the sea salt.)

Question by ericrowe   |  last reply


Closed system-conductive heating of pool with solar

Hi clever folks, We've been reading the Instructables for making solar hot water systems to heat a swimming pool (4000 litres) in our very shaded backyard (in Australia). We like the idea of using a coil of black poly pipe or garden hose laid out in the sun to heat up and then pumping this through the pool during the day, but the thought of bacteria building up in the pipe has struck fear in us! Sooooo....we may need another plan. I've read way too much on Legionalla and now think it would be safer to have a closed system. What we had in mind is a network of thin poly pipe either in 2D or 3D that would float (or be weighted slightly to sit in a good portion of the water "column"in the pool) and connect this to a long length of black polypipe that would receive solar heating. Obviously this would be a heating system that takes place when no one is using the pool (i.e. when the kids are at school). We'd keep a pool blanket on to insulate it too. When someone wants to use the pool, which would typically be in the evening for us, we'd remove this so-called radiator. Hopefully it would not be too heavy as the thin poly pipe network will be filled with water. Hmmm...so tempting to try it this weekend. We just would love to hear from folks that have knowledge to share on these topics. Thank you, Elise

Topic by ebb_au 


How to harness waste heat from a gas hot water system? Answered

I have a outdoor gas hot water system in the courtyard of my rental property. So much waste heat blows out of a vent at the top of it, I want to harness this somehow but there is a sign on it that says specifically not to cover it. I was thinking about building a box type arrangment on top of it to use for drying clothes. Even beter would be a way to use it to heat the house as it is winter here in melbourne and freezing cold but. It seems like venting and flow is a bit of a complex subject. Anybody with any expertise here? Cheers (Edit: I have decided not to go ahead with this project as the amount of heat the water heater emits on standby isn't enough to worth bothering with. Thanks to everyone for their replies)

Question by xkravx   |  last reply


how to make a water bed for dog? Answered

I want to build my dog a water bed that is just like a regular water bed. i wanted it to be heated and all. i have a water bed that my dog loves but i am having to get rid of it. the dog is a toy poodle so wont have to be to big. if you have any suggestions please tell me them. i can use my current water bed for parts.

Question by mstudinger   |  last reply


Energy underneath your house?

Hi all! I've being thinking on how to get off grid for a while now, in the first stage to use solar power to get the energy bills go down and in second place to get my stamp on earths energy consumption, using my house in a greener way. So solar energy and wind energy are on my mind, but recently i started to think about more possibilities. Like using my crawlspace to work for me. Maybe its posible to make a wind turbine underneath the house, or use the constant temperature to cool my house during summer. I've seen plans on the internet ( and cant find them anymore... ) about using a sort off vacuum chamber that has a constand wind flow comming in, trough a system of pipes that drive a wind turbine inside. The idea is that, because of the vacuum effect, you need only a small gust of wind to power the turbine. Where i live theres always wind, sometime a little, sometimes waaay to much. The crawlspace i have isnt that high, about 50CM in hight, and during the Fall and Winter months theres a high level of water, about 25CM. Durring summer its mostly muddy sand, so there's stil a lot off cool water trapt in there. So about the idea on cooling my house, how about a water cooling system that runs trough the house? How would you guys make such systems, have you already tryed this out, and are there some enthousiastic folks out there willing to go all the way and show these idea's are doable, so everyone can make it??? Hope to hear from you soon ;-) Greets, Arie

Topic by AriedeB   |  last reply


What's the best type of solar water heater?

I am in the process of renovating a bathroom that hasn't been used since before i was born, which currently lacks a water heater. Being poor, it is very unlikely that i will be able to buy an on-demand heater for this bathroom, and i know how inefficient normal water heaters are, so i am looking into solar water heaters. I live in a sub desert climate, so catching sun is not a particularly big issue, but i am looking to find out what type of heater is most efficient, both as far as heating water, and cost. would i be better off with a passive, or active system, and what other recommendations do you have for solar water heating?

Question by cyc4015   |  last reply



Boiling a fluid to make a inverse water wheel?

Ok, how about this; Submerge a waterwheel type structure with cups facing downwards on one side. Under the cups you have some kind of heating element. The fluid is methanol or some other low boiling fluid. A very small amount of heat from the element will produce bubbles, which rise and are caught in the cups, the wheel turns and can generate electricity or whatever. I'm using this principle in another application, but thought it could be quite an efficient means of generating electricity from heat. If the meths is sitting at forty something degrees and boils around 50, it shouldn't take hardly any energy to tip it over. And since you're effectively generating force from gravity (the weight of the fluid on the other side of the wheel) you're kind of getting ten times your force back. ie producing one litre of bubbles will give you 9.8 Newtons of force (for water, 8ish for meths). So (excuse my dodgy maths) 125 litres of bubbles in an hour would give you 1 kiloWatt hour? One cola bottle per minute, doesn't sound very much and that much energy could easily be produced through concentrated solar. Slight risk of explosion... How efficient do you think it would be, overall?

Topic by SolarFlower_org   |  last reply


How can I heat my unheated basement using the existing hotwater pipes but without altering the hot water system? Answered

My basement is freezing as it doesn't have a radiator. Its does however, have two 3m hot water pipes from the central heating system above running accross the ceiling. How can I use the heat from these without altering the hot water system? I was considering encasing them in ducting and using a 12v fan to blow cool air in one end and warm air out of the other. Thoughts? Would painting them with a specific paint help? I need ideas. I'm FREEZING! :D

Question by Tassle   |  last reply


Why hasn't the steam engine been reborn for modern cars?

With present gas/pollution concerns and green tech merging with cars left and right... Why hasn't the steam engine been reborn? I mean what takes MORE power, Electricity to move a 1000lb car or heat up a heating element to heat water and make steam? With tanks strong enough to hold Hydrogen for cars why cant the same tech be used for a steam engine? All the fuel you would need would be water (solar panels/batteries to power heating) but just water for fuel. Thoughts?

Question by Green_Primus   |  last reply


how to fix holes in a polyethylene/polypropylene solar heat exchanger Answered

This solar heat exchanger is a 5m sq flat sheet consisting of two layers of black polypropylene or polyethlene (not sure which)with rows of fine bore plastic tubes sandwiched between through which water is pumped from the pool at low pressure.The water warms whilst passing through the system, then empties back into the swimming pool, hence, free pool heating. After 2 seasons of use, there are a few leaks at the joints where the fine tubes meet the main inlet tube. I tried to seal them with glass fibre, then cyano-acrylate resin...nothing stcks to this type of plastic. Any ideas for sealing these holes? The plastic is too fine to use a heating method.

Question by MalKnowles   |  last reply



Can I make a wind powered resistive water heater with an old AC motor?

I've got a bunch of old ac motors and a cold pool. If I made wind generators out of them to power an old water heater, I could heat my pool. I'm making the blades for the wind generator now, but I'm worried something might blow, but I don't see what would.I know the frequency and voltages would be wrong, but does that really matter? As long as I don't over amp it, wouldn't it be fine? I figure some one else must have thought about this, so I'm asking!

Question by brdstf40   |  last reply


Proposed Evaporative Air Conditioner

Have an idea for a Evaporative Cooler.  In most conventional coolers a fan pulls warm air through a panel that is constantly soaked in water, the water pulls the heat from the air.  Another form of this system is the simple "Mister Jets" that spray a fine mist into the air which pull the heat from the air dropping the temperature.  My idea is a combination of the two... See Image. The concept is simple... - Fan pulls warm air in and forces it into the body of the cooling unit. - A mister sprays a fine mist that combines with the air pulling the heat out. - To remove the fine air molecules a synthetic membrane (like pond filter material) is used to collect the vapor and allow the air to pass freely through. - The resulting water will make its way down the membrane and drip into the water basin below. - The pump will then recirculate the water back through the system. Seems like an easy enough system, the only problems I can see are... - Mildew - Leaks - Filter doesn't remove all the water So let me know if you guys think this will work.

Topic by scubaru   |  last reply



what could I use for.....

Hello! For a project that i will transform into an instructable I would need a color with following properties: - Stick to metal - Possible to remove using solvents - Water resistant - possibly sprayable - Protect sprayed material from direct contact with water. (not long term.. half an hour is enough.. ) - NOT heat resistant. if heated the color should be damaged and come off the metal without the use of any solvents. - must be as dark as possible any Idea of what could be used? Thanks!

Topic by sharkyenergy   |  last reply


Is it sensible to work out how long it takes to heat your hot water tank? To set your timer.

I'm thinking, how long should it take from cold, to user temperature. I rarely run out of hot water, but the wife set it to come on at 4.30pm and go off at 7.30pm, the boiler clicking on and off throughout this period. If the boiler clicks off, does that mean its hot enough, or does the system build up the temperature in stages? I don't want to waste energy with trial and error, if someone can guide me roughly. Kind regards Mike

Question by mikee55   |  last reply


Is oogoo (DIY Silicone Putty) Oven-safe?

Hello! I have a question for people who use oogoo, or generally DIY silicone molding putty made from 100% silicone caulk. I want to cast oogoo molds of lego bionicle masks with polymer clay, but my issue is I need to keep the clay inside the mold in order to prevent any kind of warping, as most of it is spread a little thin (1-2mm thickness) and I don't want to end up warping it even in the slightest. Is oogoo or cured 100% silicone caulk oven-safe as long as it's within the specified temperature range? (I already know most DIY silicone putties aren't food-grade.) The silicone caulk I'm using is GE all purpose silicone I, mixed with corn starch, acrylic paint, and baby oil. The back of the tube says that it should not be used on surfaces that will exceed 400F/205C. The polymer clay I plan on using is cured at 110C, so I don't think it'll be a problem, but I'm worried exposing the silicone caulk mold to high temperatures will cause it to release some harmful chemical compounds. I looked up an MSDS sheet for GE silicone, and they had a generalized one stating exceeding the maximum temperature will cause the release of formaldehyde. Since I plan on baking these in our kitchen oven, I wouldn't want harmful chemicals contaminating a space where we cook our food. Also, if baking isn't an option, since the polymer clay is spread thin, and cures close to 100C, would curing it in boiling water be an option? (That way any water soluble chemicals would remain contained while the clay hardens.) All help is appreciated!

Topic by SixFootBlue   |  last reply


Has anyone ever made a room furnace with a light bulb? I've heard of using light bulbs contained in a metal box. Answered

Any ideas. This principle could work along the same lines as an oil hot water heater pumped through a radiator (you know those 300 lb.+ radiators from older houses), but using the bulb in place of the hot water.. If it was portable, that would be great. I could make a nice cover or wood cabinet around it myself. What would be a good metal to line it with that could magnify the heat of a light bulb. Obviously, this would need to be a safe product. Getting a little warm on the outside is not a problem in our home. I mostly just need some idea as to what metal to use to magnify the heat of the bulb. Thank you in advance for any help or ideas.

Question by Lori216   |  last reply


need ideas on greenhouse

Hi there,I live in Boston, MA and I am looking for some advice on Greenhouse construction for winter gardening only (and vegetables that are appropriate for that as well). I am looking to build a greenhouse that I can put up in the fall and take down in the spring for growing a winter garden. It will have to be able to be taken apart into its components and stored in a shed in summer months since my family has no need for it then. Due to the fact that it will be used in the winter, it will have to be highly insulated and have a heat sink that will be able to help maintain a constant growing temperature for the plants inside. Ideally I would like to avoid expending much energy heating the greenhouse. I am, of course, also doing this on a budget. Here is what I have come up with so far. 1. I will use triple-wall or 5 wall polycarbonate panels for the walls of the greenhouse2. I have found a few insulating products that look like they could be useful3. I am thinking of using a solar collector water heater as part of the heat sink- easy to construct on my own : https://www.instructables.com/id/Solar-Thermal-Water-Heater-For-Less-Than-Five-Doll/ that could circulate hot water into the heat sink4. I am learning about heat sinks and thinking that I want to use the simplest design and organic materials (mud, rocks, or water) to hold the heat during the day and release it at night.5. The greenhouse footprint can’t be larger than 8’ x 10’ 6. I prefer the simplest construction that meets my needs (and the easiest to put up and take down)Questions that I have:1. What are the possibilities for using compost as a source of heat?2. What about a PVC frame?3. How would I circulate hot water through the heat sink?4. What are methods to reduce daily management of the project?5. Types of hinges to use?6. What type of material should I place the greenhouse on?- it will be sited on the concrete area around our swimming pool and I don’t know what sort of insulation is necessary after that. I had the idea of wood pallets with insulation inside them but that may not be enough at all.7. Any ideas of ways to re-use materials to do this cheaply and reduce waste?8. Any suggestions on the optimal shape of the greenhouse roof/sides to increase heat retention and circulation of warmer air.9. Any suggestions of retailers that might have the materials that I am looking for.Some links that have been useful so far:http://attra.ncat.org/attra-pub/solar-gh.html#storagehttp://growerssupply.com/farm/supplies/cat1;gs1_greenhouse_building_materials;gs1_corrugated_sheets_panels.html

Topic by ocea46   |  last reply


Simple, efficient, low-cost, solar energy equipment

I am looking for a DIY simple, low-cost solar water heater and solar light that will work in any kind of weather and still be able to supply atleast some working heat and light. Please suggest.

Topic by rseni   |  last reply


If I mist my condenser while it help cool my house? Answered

Lets say I put a mister on my condenser outside, and when the air conditioning comes on it sprays water mist on the condenser. The idea would be: as the water evaporates on the coil it will remove more heat from the unit and it wont run so much.

Question by BluTiger   |  last reply


Reusing Plaster of Paris?

...or simply plaster, is a type of building material based on calcium sulfate hemihydrate... It is created by heating gypsum to about 150°C....When the dry plaster powder is mixed with water, it re-forms into gypsum...So...if I heated the gypsum to +302F (150C), it would turn back into plaster of paris, to be reused agian? Of course you would need to powder the used plaster (gypsum), but would it work?

Topic by John Smith   |  last reply


hot glue in a dishwasher?? Answered

I am repairing broken locking mechanism in the door of a dishwasher. Of course there will be a bit of force involved when pressing the handle and the dishwasher will heat the water which can melt the glue. What's your opinion? Should i use it??

Question by Karletto555   |  last reply


How can you make a fridge more efficient? Uses of solar, heat exchangers, etc. Any ideas?

I was thinking of a heat exchanger, on one end a constant stream of cold well water, on the other end, the fridge coils. Or maybe use solar to cool it with peltier effect device? To keep it from coming on too often. Throw out any ideas, just though of this but have not seen it around, probably for a reason. It would be nice to use this idea at a cottage or camp eventually with little to no power, but at a cost worth building. The point would be to save money over the long run, so like a full blown solar would work, but it would cost a lot. Thanks again

Question by newinvestor23   |  last reply


Solar cookery

Hi there. I am just new to the site, I have been wanting to practice solar cookery for a while when i stumbled upon this site. Guys I am amazed at what i have found here. I live in Noosa, Australia and its a very eco minded community. I have wanted to go and build a solar oven for a while but i live in an appartment so space is limited. we have a balcony which gets a large amount of sun in the morning till about 1pm. So i have an idea to build a water heater of sorts which i would like to be able to used to preserve food in the form of jams chutneys and any jared preserve basicly ( I'm also a chef so i have a know of alot ot things i can preserve including meats ) . I think my only issue is reaching high enough temperatures to be deemed safe ( above 78 C for long periods) .  My idea to do this is to use a larger sized container say around the size of a 5 litre bucket and set up a heat sink to help the temperature to get higher longer.  For the heat sink materials i was thinking of using aluminium cans and perhaps to line the bucket with it too ( perhaps just foil instead for ease). I would like to set up and array around the bucket to help collect as much sun as possible for as long as possible and seal the entire container to help condense the water pressure to sustain the heat.  I guess i question is will a large abound of heat sinks help to heat the water significantly. any advice would be welcome and yes i wull document this when i make it on my next days off work.

Topic by jramsay1   |  last reply


Drawing a Parabola for Solar Cooking

I'm building something using a parabolic curve mirror to heat water with the sunshine. I've been out of math class too long....I found these nice sites to help simplify drawing a parabola.Parabola Design Wood ModelDraw a Parabola, using pencil and string

Topic by robbtoberfest   |  last reply


Glass covered solar trough?

I have seen a lot of designs for solar troughs but I have not seen any with a glass cover on them. Why not? I want to build a solar trough to heat water for the hot tub but I need it to be able to shed michigan winter snow without filling with snow and wondered if the glass would interfere with the operation

Question by Rainh2o   |  last reply


Where can I find a/an (ideally black) watertight fabric that could be used for a solar water heater?

I'm in sunny New Orleans, and we are encountering a ridiculously cold snap.  I don't keep my house too warm, so I'm dying with electric heater cost.  Since I know my windows are one place where a lot of solar might be collected, and energy is lost, I am trying to find a way to collect passive solar energy. The idea is to sew several tubes into watertight fabric in a design like a radiator, and then fill them full of water.  The idea is that this will absorb the heat from the sun and then, as night falls, act as insulation against the cold.  And I am hoping that I could hang them in the windows of my house and remove them when it warms up. Does anyone have a suggestion for watertight fabric that I could use for such a project? Thanks D. Adrian

Question by Bannanaman   |  last reply


Whats the best way to charge a 48 volt battery bank with a 110 volt(140 max) DC Wind generator?

I would like to use my 110 volt Jacobs windcharger to charge my 48 volt battery bank. Then possibly switch over to water heat elements as a dump load when the battery bank is full. This last step could use the full 110 volts. The Jacobs is rated at 20 amps, about 3000 watts.

Question by ShadowB 


Night time Solar cooking

How would you like to cook with Solar power...after the sun went down?  It looks like MIT is on to something for the next step in Green tech. I found this idea very inspiring and it really makes the mind think of other uses beside just cooking after dark with the Sun. Think about useing this as a home heating device or water heater.  We could get millions of people off the electric grid with this type of invention if scaled up or engineered for the right useage. Any other ideas out there folks?

Topic by RedneckEngineer 


Cracked Marbles menagerie

How do I find instructions for making cracked marble animals? I used to do it and had a little design book of critters but can't find it now. You started by heating marbles on a cookie sheet at a high temp. I think it was 450 for 15? minutes? Then pour them into cold water in the sink to make them crack. Then you used some awfully smelly glue and other small pieces of arts and crafts to make critters such as a worm, dog, cat, mouse, etc. They were really cute and I would love to do them again.

Question by da451 


Softening Candle Wax (lost wax casting)

Well, I made my first lost wax casting yesterday using lead, and a Plaster of Paris mold. It worked great, except that I didn't have enough lead. But, after searching on the great web, I realized that the wax I used was much harder than what the sculptors use. Why is this? Is it a different type of wax? I searched Google, and couldn't find anywhere to get the wax I needed. Maybe I typed in the wrong name. I don't know. I'd much rather use my own wax, as my mom has a stockpile of large-er sized candles that softened and deformed in the Florida sun. How would I soften it, other than heating it in water? Is that water method thing how they normally do it? I'm really into melting metal, and want to do more casting, so can someone help?

Topic by John Smith   |  last reply


Best adhesive to attach used wine corks to wood and/or plastic? Answered

I'm making a door mat of old natural corks, so the adhesive needs to be heat resistant and waterproof.  The corks will be spaced, to allow dirt & water to pass through; so, the adhesive should be strong enough to withstand the daily treading, without the benefit of the support of other corks packed closely together. My first thought was to hot glue, but that has no flexibility and the corks would probably pop loose very quickly. I've seen wine cork instructables using wood glue, Gorilla (R) glue and rubber cement. I haven't worked with the first two.  Any experience with these materials? Your input is appreciated; thanks, Community!

Question by meowzebub   |  last reply


Kyoto trough 2 wing concept. Try it in a panel cooker?

Panel cookers are simple solar cookers that are made by folding cardboard. When folded, sunlight shines on the panels and gets reflected to the cooking pot. (Normally the cooking pot is painted black and it is often covered in an oven bag to keep heat in better). But, I have never seen a picture of a panel cooker with the side folds in towards the cooking pot instead of out away from the pot. My tests indicate that it will cook for a longer time if you face the side panels in. Anyone want to try it? Also, the tests in software show that a normal panel cooker might give better if it was made with a long tail in line with the path of the sun. Would you like to make small ones and compare this to a normal panel cooker? Small ones heating pint jars of water might be very good for comparison. I have too much cloudy weather to do this. Also, do not worry too much about parabolic. A part circle is just as good for solar cooking and the important thing is to have the axises of curve (Perhaps there is a correct word?) of the troughs or panels at right angles to each other. Brian

Topic by gaiatechnician   |  last reply