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Found 2 results

  1. Parrothead

    Solar Water Heating

    During my time researching all aspects of solar power, solar water pumping, and anything else I could imagine regarding solar, I learned about solar water heating. Since I decided to become pretty dependent upon the ol' Sun, I figured that I might as well ask the ol' boy to help me take warm showers, too. So, after some more research to determine what it would take to do this, I sorted out that a thermosiphon system would probably the best way for me to go. I found some 12vdc high temperature water pumps on eBay. They would work perfectly for a forced flow water heater. I may end up going that way as well. But, it would take more time, and money, to build a thermosiphon panel / tank than I have at the moment. Something short and sweet is what I needed. Sometime back, I happened on to a site where a guy had put a lot of time, research, and energy, into building a solar water heater for his swimming pool. I figured it would work for showers just as easily. While he piped his six panels in parallel, I will make two of them and run them in series. (I may regret this later, especially on a really sunny day.) For now, I figure I can get by with two lengths of 1/2" X 60 meters of black plastic tubing, mounted on 4' x 4' (1.22 m x 1.22 m) sheets of plywood. That would give me, roughly, 16 gallons (~60 Liters) of hot - to really hot water, to mix with the cold water from the storage tanks. I will just set the two panels on the roof and let the sunshine go to work.
  2. Part of a previous project I wanted to work on in Battambang, was to initially get a fairly constant (clean) water supply to the house. Ultimately, I want to drill a well. However, I wanted to do whatever it took to get the home in order so that it was "barang" livable, first. So, my priorities, in order of importance, were - 1. Constant source of power - solar array. 2. Semi-constant source of water - rain water collection / harvesting. 3. Western toilet installed on grounds. 4. Pressurized water system, including DC pump, storage tank(s), and possibly a well. 5. Possible solar water heating project. 6. Anything else that I would need as a creature comfort. Since item number one was covered here, and will be completed by this up coming Tuesday, I figured why not go ahead and start on item number two, which will begin tomorrow. No better time than the present, I say. Currently, there are three of the Cambodian style water storage "jars" on the property. They provide a total volume of 3,150 liters, currently. Obviously, I will need much more. However, considering I will cover a well in item number four, above, I shouldn't need to depend on the 3,150 liters for too long. At the moment, I have 55 m2 of roof area, from which to collect water. I realize this doesn't sound like much. But, considering the volume of water that is dumped during these monsoon rains, and after having watched the water fill some of the smaller tanks simply from the water falling from the sky, I figure the roof will make short time of filling three - one thousand liter tanks. Some how, I just do not see Cambodia following along in the "typical" parameters that would apply to most mathematics calculations. In fact, according to the calculation to determine how much water you can harvest from a given roof area, the roof in question should only be able to provide a bit over 3,000 liters, over the course of an entire year! Let me tell you, folks, I found that quite laughable, to be completely honest. It was so funny, and so "out there", that I actually calculated the variable three times! Each time, it came up the same, exact figure. Anyway, tomorrow, the concrete pad for the tanks will be formed, poured, and will hopefully cure before the afternoon rains set in. Then, the gutters will go on the house, the PVC will be routed from the downspouts, and the tanks will be set in place and linked together via a 1/2" PVC pipe and a few other fittings. Considering we should still get a fair amount of rain through October, this should be a decent time to set in to test this new project out. Breakdown for labor and material costs: $49 USD - labor rate for one installer (boss) and three laborers. *Salary breakdown: $17 (journeyman), $7 (laborer), $10 (laborer), $15 (laborer) $57 USD - PVC, rain gutters, and all accessories necessary for assembly. $40 USD - big rocks for filler as sub foundation for concrete slab. $15 USD - small rocks for filler as sub foundation for concrete slab. $25 USD - sand to mix with cement. (We only used about 3/5ths of the sand for the project.) $33 USD - cement for foundation. $04 USD - We had to purchase 3 more 90 degree 2 1/2" elbows due to an - oooppps! $223 USD - TOTAL * The reason for the salary differences is because the laborers were there before the actual construction, moving the sand, rock, and cement to the work site. Please understand that, had I just made a simple harvesting system, I could have done so MUCH cheaper. However, I am using a design of a "First Flush System", similar to one made by a guy on YouTube, to prevent the initial water from the roof to be sent to the tanks. This alone, added significant cost to the over all collection system. But, it also guarantees cleaner water will be delivered to the storage tanks. ============================================ UPDATE 22-12-13: Since this thread was started, we have added another 30m2 of rain water catchment area to the farm house. Also, the original figure of 20m2 was incorrect. It was 25m2. UPDATE 18-01-14: The added roof, with steel supports and trusses, cost $13 / m2. The total cost was included in a $1,000 USD extension project. But, comes to $390 USD, total. Additionally, we finally got around to finishing connecting the added roof collection area to the rainwater harvesting system. We bought two additional lengths of 2.5" PVC. However, we only needed length for the job. The cost for each length was $4.00 USD.
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