![]() | #46 |
Distinguished - BHPian ![]() ![]() Join Date: Jan 2008 Location: Gurgaon
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| ![]() Sorry but your plumber is probably nuts. Install the pump at the base of solar heater HOT tank. You can get one cold water line there as well (or create a shunt from incoming cold water line of solar heater). The output (pressurised) is then to be routed to needed locations. Using pressure inside the solar water heater would not work as a) tubes need to be robust enough and even more importantly b) the solar water heater works on convection circulation and not forced circulation. Assumption that solar water heater's cold water holding tank is below the level of over head tank or there is arrangement in place to feed cold water to solar water holding tank. |
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![]() | #47 |
BHPian ![]() | ![]() @deep_bang Well first of all your plumber is correct regarding the pressurised heater part, I install pressurised solar water heaters for customers who are going to use a pressure pump for the same purpose as you here in Goa. A normal SWH cannot be used if you will be using a pump. I do not know which company in Bangalore will have the pressurised heaters, but here in Goa I deal in multiple brands and I mostly install VGuard's pressurized systems as I found them reliable. So you can contact your local Vguard dealer for the same. The cost will be a little expensive but it is safer to go with a pressurised system rather then trying your luck with a non-pressurised one . Last edited by richie4u : 1st May 2011 at 10:38. |
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![]() | #48 |
Distinguished - BHPian ![]() ![]() Join Date: Jan 2008 Location: Gurgaon
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| ![]() Can you please elaborate expensive? |
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![]() | #49 |
BHPian ![]() | ![]() the pressurised system will cost around Rs.10,000 more than the non pressurised system. |
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![]() | #50 |
Senior - BHPian Join Date: Oct 2005 Location: Faridabad/Delhi
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| ![]() Sudev Ji, I have a few queries:
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![]() | #51 |
Distinguished - BHPian ![]() ![]() Join Date: Jan 2008 Location: Gurgaon
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| ![]() No softener but running it direct from municipal and bore well water. Have run it for two years without problems. Unfortunately as I am moving house this has been dismantled this weekend. Did not find any significant scaling. It is donated to a charitable hospital where I hope it continues to provide many years of service. I doubt solar heaters with distillation are available. It would need evaporation and there after condensing unit too. And distilled water is not good for drinking. There has to be minimum salt/mineral content. Infact pure water is virtually a poison for human body as it will start to "leach" salts from body. I do not think solar - steam - electricity is viable cost economics with today's tech. Future? |
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![]() | #52 | |
Senior - BHPian Join Date: Dec 2010 Location: Ghaziabad/Hyderabad/Mysore
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Distilled water is not poisonous for the human body. In fact ASAIK some companies abroad actually sell bottled distilled water. It is just that it is waste of money when even hard water will do you no harm. thermo-solar is slowly becoming more and more viable (in fact it is cheaper on a kWh basis than photovoltaics), the problem is not in generation of elecricity, the problem is that it can not done at a small scale (like photovoltaics) and large scale generation has to be done in areas where land is cheap and you get a very good amount of sun - i.e. hot deserts In such areas water availability is obviously one problem, the other is that they are far and so electricity produced has to be sent to populated area via expensive new grid systems increasing the installation cost. Last edited by vina : 3rd May 2011 at 14:06. | |
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![]() | #53 |
BHPian ![]() Join Date: Nov 2009 Location: Bangalore
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| ![]() Friends, there is a government subsidy of 30% announced by the Government for installing solar water heaters in residence. This is being advertised in both deccan herald and Times of India in Bangalore. I am not sure if this is applicable for whole of India or just Karnataka state. You can save a cool 12K towards cost of solar water heater in your home. I have a solarizer water heater 200 liters capacity which was installed 3 years ago and has been saving atleast Rs.400 per month on electricity bills and BESCOM gives a subsidy of Rs.50 every month on top of that for the electricity bill. I had paid 34K to get it installed at that time. Now the same 200L model costs only Rs.27K because of the government subsidy. Whoever have plans to install solar water heater in their home, do act now. My father in law got the connection this week and he said the salesman indicated to him that government alloted about 50 crores towards subsidy and people can claim subsidy only until this amount is exhausted. Beyond that, they will have to shell out the fill cost of Rs.36K which is the current MRP. We will never know if the state government would allot more funds later towards the solar water heater subsidy. So make hay while the sun shines. Trust me, it is a very worthy investment. |
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![]() | #54 |
Distinguished - BHPian ![]() ![]() Join Date: Jan 2008 Location: Gurgaon
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| ![]() There are three savings: 1. Capital subsidy of ~10k at time of purchase 2. Electricity bill rebate. I get Rs200per month in Haryana 3. Reduced electricity bills. |
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![]() | #55 | |
Senior - BHPian ![]() Join Date: Dec 2005 Location: Ridin earth now
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I don't know if this is feasible ,but can you not settle for non pressurized shower ? Last edited by black12rr : 31st October 2011 at 16:03. | |
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![]() | #56 |
BHPian ![]() Join Date: Dec 2006 Location: KA 05, MH 10
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| ![]() I stay in Purva Fountain Square in Bangalore (its a high rise apartment with 13 floors) and I have installed a solar water heater. I have a terrace so this was possible. Had to struggle a bit while getting the plumbing modified so this heater could be connected. Its a Solarizer water heater and is pressurized. Its been working for 2.5 years now and is doing well, hope it continues to do the same. Except for fully cloudy days it gives good amount of hot water for my family of 4. Further its very useful if I have to fill up my bathtub as I assume conventional geysers capacity wont be enough. During rainy seasons, I need to switch on the electric heater present in this model. Average difference of rainy season monthly bills and other months has been around 400-500, so I assume thats the saving I am getting as of now from installing this. The only problem has been the quality of water in Marathahalli area, 6 months back I got it serviced and there was scaling formation inside the storage tank which was removed. |
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![]() | #57 | |
BHPian ![]() Join Date: Mar 2007 Location: Bangalore / Boise
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Secondly, the pump has a cutoff as soon as a preset pressure is reached. In my case it has been set to cutoff at 4bar, and cut in at 2bar. So, with these settings, i see that the pump is ON for about 10 seconds, and OFF for about 40 to 50 seconds, while the shower is being used. So, it would hardly consume much power as compared to the water heater. However, what is a big pain, is that for this one pump, i had to install a pressurised solar system that costs about 10k more. Further, plumbing for pressurised hot line, pressurised cold line, non-pressurised cold line - all this made it very complicated. Yes - like you suggested, it would have been nice if i could have settled for a regular shower - but it was wifey's long standing requirement, and hence i went for it. Not at all practical - but ![]() | |
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![]() | #58 | |
BHPian ![]() Join Date: Mar 2007 Location: Bangalore / Boise
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How was the scale formation removed? The water in my area is also pretty bad, and surely i would need to get similar maintainance work done. | |
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![]() | #59 | |
Senior - BHPian ![]() Join Date: Dec 2005 Location: Ridin earth now
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![]() | #60 | |
BHPian ![]() Join Date: Dec 2006 Location: KA 05, MH 10
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Apologies for the delayed reply. My apartment doesnt have any rules that prohibit use of solar water heater. Solarizer has supplied me this equipment and they do a regular service. They sent a person after I booked a call with them. Scaling was in storage tank which was removed by shaking the tank and draining the existing water through the outlet pipe. I could see the small white gravel and stones like material flowing out with water. I didnt have any scaling in the panels but the service person told me that it can also be removed with help of a pressure pump, which they bring if required. Charge was Rs 250 plus cost of replacement of bushings that were worn out due to exposure to weather. Its better to do a regular service (once in 6 months is recommended by the company) if water quality is a problem. Last edited by deepaktpatil : 7th November 2011 at 16:17. | |
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