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Andy
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Post by Andy » Fri Nov 24, 2006 9:36 pm

You don't seem to have a flow restriction valve on the pump outlet ?
Is that correct ?
Dan!

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Andy
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Post by Andy » Fri Nov 24, 2006 9:36 pm

SNAP!
Dan!

Seveneer

Post by Seveneer » Fri Nov 24, 2006 9:37 pm

Yeah, but I was first :P

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Post by Andy » Fri Nov 24, 2006 9:47 pm

Seveneer wrote:Yeah, but I was first :P
Mine was a more considered post! :wink:
Dan!

Seveneer

Post by Seveneer » Fri Nov 24, 2006 9:48 pm

:roll: :lol:

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Andy
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Post by Andy » Fri Nov 24, 2006 9:50 pm

Hefe's flowing well BTW 8)
Dan!

Vossy1

Post by Vossy1 » Fri Nov 24, 2006 9:55 pm

I was aiming for a 50% flow rate per min, thinning my mash to aid is ness

I was hoping to use the HE to restrict the flow without using a valve.

I have just done 3 trial runs and the output from the return manifold is 11 ltr per min, which I'm quite happy with.

Wether I'll stay happy with that with a mash is another question.

When I conducted initial trials with the clear tube I got some interesting results.

With the tubing taught from tap to pump inlet the tubing was fine. Initially however I cut the tube with some slack and this caused the tube to collapse as the temperature hit mash temp :!:
Last edited by Vossy1 on Fri Nov 24, 2006 9:56 pm, edited 1 time in total.

Seveneer

Post by Seveneer » Fri Nov 24, 2006 9:55 pm

That's great Andy. 8)

I had a couple of pints of my Christmas brew last night and had a wicked headache this morning :lol:

Seveneer

Post by Seveneer » Fri Nov 24, 2006 10:00 pm

I really think you'll need to restrict the flow. Also, I'd not be concerned with trying to get a high flow rate. Slow is good for this application.

Vossy1

Post by Vossy1 » Fri Nov 24, 2006 10:05 pm

The reason I went for a high flow rate was for thermal efficiency.

My other pump managed 6lrt per min, I thought that was going to be adequate...it wasn't.

The finger is slowly being pointed at the HE, from my point of view.

I'm thinking aloud, but maybe the 4ltr HE volume is too gr8 too allow for quick heat transfer!

What do you think 7 :?:

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Post by Andy » Fri Nov 24, 2006 10:10 pm

Not wishing to preempt Phil but I would think that 4L is fine and the thermal response would be adequate - at the end of the day with a single temp mash it's all about maintaining a constant temp which the PID will do. The mashout stage wouldn't take long to take place either.
Dan!

Seveneer

Post by Seveneer » Fri Nov 24, 2006 10:14 pm

Well, mine is 2l which works beautifully. I don't think you'll have a problem with a 4l HE maintaining a constant temperature. It will be slower to react to changes in set temperature though.

I got some questions...

When you say "thermal efficiency" what do you mean?
What temperature is the water in the mash tun you are trying to run through the heat exchanger?
Are you starting with cold water and using the heat exchanger to heat it to mash temps?

Vossy1

Post by Vossy1 » Fri Nov 24, 2006 10:14 pm

Thanks Andy 8)

I think the 1st point of call is a reliable thermometer and maybe one of yours and 7's pump as back up 8)

Seveneer

Post by Seveneer » Fri Nov 24, 2006 10:14 pm

Nice one Andy :lol:

Vossy1

Post by Vossy1 » Fri Nov 24, 2006 10:19 pm

I mean heat transfer when refering to thermal efficiency, which is wrong :oops:

Tonight I started with the water, pre heated, at 75 deg c to save some time.

I don't actually pay any attention to any readings until the water hits mash temp of 65 deg c.

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