AmyJoseph AmyJoseph's posts

Posted by AmyJoseph AmyJoseph on Aug 22, 2010 03:26 am

#1 -  Renewable Energy > Technical Discussion: Solar Heating - Solar Thermal > Re: SHW & Existing Oil-fired Boiler w/storage tank
Reprinted


I'm looking at SHW. I've got an existing 3 year old oil-fired boiler that provides radiant heat and domestic hot water. The domestic hot water is stored in a 40gal tank. (We use very little water each day - typically 50-100gal/day total - hot & cold for the 3 of us).

What I'm wondering about is the configuration of a SHW system. I'd like to have our cold water line run into the SHW tank, then have the outflowing hot water go into the existing 40 gal tank, then out to the supply lines to faucets, etc. I am not interested in electric backup on the SHW tank. In this reasonable? Thanks.
 

Posted by AmyJoseph AmyJoseph on Aug 17, 2010 07:20 am

#2 -  Renewable Energy > Technical Discussion: Solar Heating - Solar Thermal > Re: leak on Db drainback tank act model 15-15xss
A general answer to leaking stainless steel threaded fittings is that threaded stainless joints do tend to leak especially with thermal cycling. The cause is generally that the threads werent cut very well in the stainless fitting. The use of low grade imported fittings is usally where its most prevalent. Its real important to use something as a lubricant on the threads as stainless threads can "gall" quite easilly, and when they gall, about the only solution is the cut out the fitting.

Generally an anerobic teflon pipe sealant like Loctite PST will work on most threads but there are some people who use both PST and teflon tape. On occasion in industry we had to resort to backwelding SS threaded fittings. I have seen some people try to make up the joint with silicone rubber sealant but I cant vouch for it 
 

Posted by AmyJoseph AmyJoseph on Aug 8, 2010 03:53 am

#3 -  Renewable Energy > Technical Discussion: Other > Windmill with rotating sails
Windmill with rotating sails is a new type of windmill. It has a vertical axle around which three sails spin around.
 

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