This project goes over the build of a homemade efficient rocket mass heater which is portable ,uses less fuel and burns clean. This heater is made out of reclaimed and repurposed materials. The cool thing about a rocket mass heater is that it stays warm long long after the fire is out.
The whole thing is powered by a rocket stove, which is a j shaped burn chamber. Fuel goes in the short side of the J, the fire burned sideways and the bottom of it. And then the draw is created by a tall vertical heat riser.
The gases then come out of that chimney go all around the inside of the barrel, a lot of the heat is given off into the room right off of the barrel. That’s your radiant heat source for the room. The barrel acts as that radiant heat source. The gases then go through a valve in the barrel down below and through a series of tubes that are encased in mass such as aircrete or cob .The gases are able to shed the heat into the cob. And the cob stores it as a thermal battery. The gases make its rounds through the tubes and goes out through the exhaust pipe.
The rocket mass heater shown here is made of a burn chamber, heat riser, bench for containing the tubes , the exhaust pipe and an insulation refractory material like aircrete which is a high temperature cement mix. The burn chamber is made from an old sheet metal pressure tank and a stainless steel water heater tank. The pressure tank insulated with aerated concrete sits inside the water heater tank.
The combustion or gasification chamber is connected to the heat riser chimney through a three inch pipe insulated inside a six inch pipe. This pipe is also insulated with a refractory mix. The vortex chamber is connected to this pipe.
The vortex chamber is made from a saw blade and a left over piece of pressure tank material . It is insulated with the refractory material . Six glue stick 3/8th inch air holes are drilled at right angles around this refractory material that creates a vortex extra air suction effect .So as that heat comes up and creates a negative pressure up the riser, it swirls around the vortex chamber and enhances the burn.
The initial combustion creates enough heat to release way more gases than it has oxygen to burn. By introducing a vortex air intake system, the burn output is amplified.
For making the insulated heat riser, we are going to use an aerated concrete refractory material called aircrete . We make the mould for the four inch heater riser using a metal mesh fabric, sarnafil roofing material and a thin gauge wire. Then it is filled it clay sand up to to the top . We take this mould and put it inside the six inch stove pipe and pour aircete through the sides all the way up to the top and let them sit to cure.
We pull the sand out of the center of the heat riser. And then eject the liner that went against the inner fabric webbing that acted as a mold for the aircrete.
The Aircrete heat riser is installed on top of the vortex chamber .The heat riser is double insulated with a old water tank and an old 55 gal oil barrel. Also the water tank is insulated from the 55 gal barrel using some pea gravel .The insulated water tank has an outlet pipe at the bottom for extension into the mass bench .
The exhaust pipe coming out the insulated heat riser has a two foot drop to a directional valve connecting two pipes ,one pipe acts as a flue chimney that goes out into the outdoors through the window, the other goes into the mass bench. The valve allows us to redirect the air to pass to the bench once the heat riser is all warm.
The eight foot long wooden mass bench houses the six inch stove pipes coming out the exhaust of the heat riser. It has a mylar reflective insulation sheet on the floor. This helps prevent the heat escape through the floor .The mass bench is then insulated with pea gravel which absorbs the heat and holds it and slowly radiate out over a period of time. The pipe coming out of the bench goes out of the window through the valve.
The flue chimney pipe that goes out through the window to the outdoors is made of double walled stove pipe. A five inch pipe is inserted inside a seven inch pipe. The space between them is insulated with a aerated concrete refractory material .All this insulated exhaust pipe is doing is taking and adding an element of acceleration up the chimney to negate the net negative you get from dropping two feet down into the bench from the heat riser.
- How to build a Homemade Copper Pipe Solar Water Heater and get super hot water fast and freeThis project goes over the build of a Homemade Copper Pipe Solar Thermal Water heater which can produce super hot water fast .This reaches temperature at or above 150F with air temperature from high 40's to low 50's. Here are the materials needed for this project are : Two 10 foot half inch copper pipes - Type L 16 half inch 90 degree elbows 18 tube straps 23 X 35 half inch plywood for the back 18 X 20 half inch plywood for the pipe support 2 X 2 lumber at 20 and 35" for the sides 4 and 3/8 inch square dowel rods for the glass support 1/2 inch threaded pipe adapter 3/4" to 1/2" garden hose PVC adapter 1/2 inch coupler. The first step is to cut down a bunch of two foot sections out of the 10 foot sections using a copper cutter. We cut 7 of them and 2 more for the top and bottom which are 30 inches each. Next we cut 8 sections of 1 1/8" for the connecter pieces between elbow joints. This allows the pipe to be spaced exactly two inches apart on the board evenly all the way up and down Connect the pipes using couple of elbows and a 2 inch connecter piece and solder them .Do it for the rest of the pipes. Slide the pipes into the plywood frame collector and fasten them onto it using 3/8 inch screws to be more secure. A small internal board is placed onto this frame which helps the pipe to lay flat inside .Also it holds the pipe at right height so that it exits through the right holes. It allows for the pipe to be easily removed from the collector frame. Cut the wooden dowel rods and put inside the collector to support the glass. Sand them a little bit so that the copper pipe will fit back through. A straight coupler is welded on to the end of outlet then you can add any pipe or connecter or wherever you want the water to go. The inner board is secured to the back board using some three quarter inch screws. The 4 corners of the 2 X 2 wood frame is secured using 2 and half inch wood screws and the corners of the back board is secured by one and one half inch screws. A 20 X 32 inch glass is placed on the frame with the help of some silicone caulk around the edge. The highest piece of copper in there is eighth of an inch away from the glass and its painted black. https://www.youtube.com/watch?v=7uOQEXmyHRs
- How to build a Simple Homemade AC Air Cooler using an Old Juice CartonThis project goes over the build of simple and cheap homemade Air Cooler made out of an old juice carton and other simple items which can be bought from Home Depot. The whole setup is powered by solar energy . The cost to build this AC Cooler is only $8.50 The drink bottle was a dollar at the store. The PVC pipe about $1.50, the DC Fan was $4.99 and the square dowels was 98 cents. The materials you need for this project are : 1/2 gallon container 3/8 inch square wooden dowel 1 1/2 inch PVC pipe coupler threaded on one end 80mm case fan Solar Panel Ice cubes Take the 80mm fan and put it down on the side of the container. Cut the three eighth inch square dowel and cut them the width of the container. Glue the fan on to the dowels on both the sides and the middle ones. Take a pencil and mark around in a circle on the inside and using a small knife , cut out the circle from the carton. Place the PVC coupler against the container and mark a small circle around it and cut along it. Widen the hole using a sandpaper such that the pipe fits in there properly. Take out the fan and grab some pieces of ice cubes and put them into the carton through the hole and put the fan back on. The fan is hooked to a solar panel. The fan has only 100 milliamps 12V power. The opening of the juice carton can be used as drain pipe which be used to drain out the water as needed. Don't waste the water. Just drink it, put a glass under there. Now you can get a nice cold drink of water after a couple hours. https://www.youtube.com/watch?v=ZnI7oXTzxbM
- DIY Video :How to heat your Home by building an Smokeless Outdoor Wood Boiler from Start to finish