Thank You Tarig. One thing I am aware of is what might help people might not work for a city. There are a couple of different ways this might work. I'll post some specific configurations and see what you think of them. With a reservoir for heating water in, a wood box sealed with a rubber type paint might work. Then it could have a plastic covering on it. The reflecting mirrors could be curved wood with a metalized reflective coating. What would be important is what would be the evaporation chamber. With the heating reservoir, greenhouse material could be placed over it to create a heated air pocket. But when converting hot water to steam, direct reflection would probably be best. The reservoir for heating water could be filled full but it might help to keep the water shallow. It would heat a little quicker. I'll give some thought to what might be a good way to try an evaporation chamber. It would need a pump to remove water from it unless the vacuum is released. If so, then purified water could drain out and then a hand pump could be used to restore the vacuum. One way to modify a hand pump to become a vacuum pump; http://lifehacker.com/5618718/convert-a-bike-pump-into-a-manual-vacuum-pump By the way Tarig, with an evaporation chamber, the reflective area might need to be 2 1/2 times the surface area of what is used to heat the water. And because it is for evaporation, water would need to fill only about 1/2 of it or less. The reflective coating can be found at a gardening supply store or hydroponic shop. I saw it online for use inside greenhouses. Maybe you could ask for a sample if you try it. Then you'll know how reflective it really is. Tarig, This is a basic diagram of how flat surfaces can reflect as curved surfaces. The specific anfgles and dimensions would need to be worked out if you try it. Would need to know what your needs are. http://i979.photobucket.com/albums/ae278/bessler_supporter/ReflectiveAngles_zpsa5a40db9.jpg

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Thank You Tarig. One thing I am aware of is what might help people might not work for a city. There are a couple of different ways this might work. I'll post some specific configurations and see what you think of them. With a reservoir for heating water in, a wood box sealed with a rubber type paint might work. Then it could have a plastic covering on it. The reflecting mirrors could be curved wood with a metalized reflective coating. What would be important is what would be the evaporation chamber. With the heating reservoir, greenhouse material could be placed over it to create a heated air pocket. But when converting hot water to steam, direct reflection would probably be best. The reservoir for heating water could be filled full but it might help to keep the water shallow. It would heat a little quicker. I'll give some thought to what might be a good way to try an evaporation chamber. It would need a pump to remove water from it unless the vacuum is released. If so, then purified water could drain out and then a hand pump could be used to restore the vacuum. One way to modify a hand pump to become a vacuum pump; http://lifehacker.com/5618718/convert-a-bike-pump-into-a-manual-vacuum-pump By the way Tarig, with an evaporation chamber, the reflective area might need to be 2 1/2 times the surface area of what is used to heat the water. And because it is for evaporation, water would need to fill only about 1/2 of it or less. The reflective coating can be found at a gardening supply store or hydroponic shop. I saw it online for use inside greenhouses. Maybe you could ask for a sample if you try it. Then you'll know how reflective it really is. Tarig, This is a basic diagram of how flat surfaces can reflect as curved surfaces. The specific anfgles and dimensions would need to be worked out if you try it. Would need to know what your needs are. http://i979.photobucket.com/albums/ae278/bessler_supporter/ReflectiveAngles_zpsa5a40db9.jpg