Water cooled SSR for heating element control

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wnv
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Water cooled SSR for heating element control

Post by wnv »

I'm building a new still and will be using a 4500w heater element. I noticed the SSR I was using for my heat controller was getting really hot just running the 1500w element in my old still. I don't think its going to handle the 4500w element without any form of cooling. This is the relay I have http://dx.com/p/ssr-25da-25a-solid-stat ... ite-134494.

This may be a bit crazy but I had an idea come to mind, what about water cooling it. I have some copper flat bar that I can bolt to the back of the relay. I was thinking of taking some 1/2" copper pipe, flattening it a little bit and then soldering it to the back of the flat bar. Then I could connect it inline with my condenser. Obviously you would have to make sure all your connections are really good so there is no leak. I'm not worried about that though, what I'm wondering is if condensation might form on the copper plate. Has anyone done anything like this? Any thoughts?
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sambedded
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Re: Water cooled SSR for heating element control

Post by sambedded »

Just mount your SSR on a proper size heatsink and forget about water cooling.
whiskyb
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Re: Water cooled SSR for heating element control

Post by whiskyb »

Looking at the specs on that ssr. It has a very low input voltage. Is this ok for a 220V single phase 4500watt element.
rad14701
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Re: Water cooled SSR for heating element control

Post by rad14701 »

whiskyb wrote:Looking at the specs on that ssr. It has a very low input voltage. Is this ok for a 220V single phase 4500watt element.
That particular unit requires DC voltage rather than resistance to control the output... A more complicated arrangement than using a PSR which only requires a potentiometer...
whiskyb
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Re: Water cooled SSR for heating element control

Post by whiskyb »

Thanks for the clarification. I am still looking and reading about power controllers and noticed the cheaper price of the one originally posted. It seems to raise the level of problems that can occur though everytime additional pieces are added, I like the keep it simple route

Cheers
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