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|Construction in Thailand Is building in Thailand as bad as it seems? Can properties really be built and fitted out to European standards? Would you like to Build your own house in Phuket, or a swimming pool in Bangkok? Solar water heating in Pattaya? Or maybe you want to build a resort or guesthouse on Koh Samui? If you want to build a luxury house in Thailand then this is the forum for you.|
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|12-01-2009, 10:30 AM||#1 (permalink)|
Solar Hot Water heaters
Has anyone had a recent experience fitting these?
I am looking at a heater with a tank about 200litres, supplied by an on-demand pump (so needs to be able to handle pressure variations) to fit on the roof
any recommendations for type, and supplier in Chiang mai area?
Please note, just a simple passive system is required, with collector tubes and a tank above
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|12-01-2009, 10:36 AM||#2 (permalink)|
Last Online: 03-06-2014 09:01 PM
Join Date: Oct 2008
Nice inquiry DrA, I too would be interested in pursuing a complete solar energy system....off the grid sort to speak. I trust those whom have knowledge and experience will respond. I'd like to know more about this shite myself.
|12-01-2009, 10:44 AM||#4 (permalink)|
Last Online: 03-04-2011 08:47 AM
Join Date: Jun 2008
I thought of a large stainless steel tank on the roof that ran into lots of tubes that ran accross the roof many time and then down into a very well insulated tank inside the roof. I dont know if this would be successful, but it would be virtually free hot water.
|12-01-2009, 10:53 AM||#6 (permalink)|
that is essentially what they are
Some use vaccuum tubes, others just copper pipes; they have a holding tank above the pipes for collection. It is all done by thermal movement, no pump
|12-01-2009, 11:07 AM||#9 (permalink)|
Last Online: Today 10:31 AM
Join Date: Jan 2006
Location: Dark side of the room
He is getting 75-85 degree hot water from solar 8 month a year between March and October.
No need for a pressure pump if the tank is positioned high enough over the usage points.
The solar collector should be positioned lower than the tank so that the hot water
in the collector auto-circulates up to the tank.
The auto-circulation will stop when tank water has the same or higher temp than
the collectors water.
Most important is the insulation of the tank, you don't want to get heat losses there.
There are two hard to handle things in computer science: cache invalidation, naming things, and off-by-one errors.
|12-01-2009, 11:12 AM||#10 (permalink)|
Join Date: Sep 2008
Location: left of center
Not water,….but here is a solar site.
Hope you get a lot of information (I am curious, also). I was thinking about setting up a system at the Khon Kean home and when I was looking around I found this site,………..
Hope it gets you started.
They have an office in BKK
119/50-51 Moo 8 Bangna-Trad Road, Bangna, Bangkok 10260, THAILAND
(66) 2746-9500, (66) 2746-8708
8.00 - 17.30 Monday - Friday
And they might be able to help you in your area????????? I think I read it someplace on their site.
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|12-01-2009, 11:18 AM||#11 (permalink)|
thanks for that SL, but that is for Solar electrics, not the same at all
to the others, I have done some research and just need to know a good supplier with reasonable prices
I don't want to make my own Marmite as I am lazy
|12-01-2009, 12:42 PM||#15 (permalink)|
On a walkabout
The best thing we have ever added to our houses and hot water you could boil an egg in.
We have only applied solar heating to our new houses and during the contruction as the systems use copper pipes. I am not sure whether normal plastic water pipes can handle the connection to one of these solar heaters.
Most large retail outlets sell this technology and it would be best to have an engineer visit you first and to have a look at the job, assess what type and size of unit you need and then to quote accordingly. As these units are normally roof mounted they must check your roof structure to make sure it can stand the weight of the working unit.
I have found the Thai manufactured systems are very suitable so no need to purchase an imported one and good luck.
|12-01-2009, 01:25 PM||#17 (permalink)|
yes, our local Global House burnt down recently, they used to sell them at about B35,000
As to pipe connections, we had copper installed at our house for the hot water system. They charged by the metre at extortionate rates, so I would be happy to know if they are importing plastic hot water pipes to Thailand yet. They say the blue water pipes eventually get fragile, which is a bad thing if buried in the walls behind tiles etc
|12-01-2009, 01:39 PM||#19 (permalink)|
On a walkabout
Up to you mate and to save some money I would purchase all the copper pipes and connections and just get a quote for the labour. Make sure your employed labour know how to silver solder correctly though!
|12-01-2009, 01:40 PM||#20 (permalink)|
yes, that's why I mentioned I need a tank that can take pressure without cracking
so it is the chlorine that causes it rather than the pressure variations?
|12-01-2009, 01:46 PM||#21 (permalink)|
On a walkabout
^ I have been using solar panel heating for about 8 years and have never had a tank crack. Yes they need servicing after about 5 years with some of the connection couplings being replaced but never a tank rupture.
Like anything mate things have to be serviced once in a while!
|12-01-2009, 04:19 PM||#22 (permalink)|
If the system is thermal-current driven (tank-panel), with gravity feed to the house, or draw-off to a pump suction, then the problem may not really show up as a serious failure, within a reasonable time.
Above 65'C is where the cracking really accelerates, although for most solar panels, they probably don't get up quite as high as that in the tank (well-mixed) too often (could, though in principle, if not careful on a very hot day, with excellent solar panel & very slow water circulation rate).
|12-01-2009, 05:34 PM||#23 (permalink)|
Last Online: 20-04-2015 07:37 PM
Join Date: Jun 2008
Location: in a state of mind
They do have the other material for hot water pipes here now, imported from germany I believe. I have a sample on my desk.
A company called SiamConsulting has it, not sure on prices though. No need for copper pipes anymore and the expense.
However the pool heater I have designed for Khao Yai will need copper pipe as it runs through 2 external heating sources.....fireplace and wood fired oven.
The black pipe coiled up on the roof works a treat....just looks ugly if you can see the roof, if not then go for it.
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