HOMEBREW Digest #2865 Mon 02 November 1998

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		Digest Janitor: janitor@hbd.org
		Many thanks to the Observer & Eccentric Newspapers of 
		Livonia, Michigan for sponsoring the Homebrew Digest.
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  Source for SS Scrubbies (AKGOURMET)
  re: Fixing chipped enamel / drain valves (John_E_Schnupp)
  Strange break formation (Dan Cole)
  Sloshing wort (Domenick Venezia)
  Long-term storage of yeast ("George De Piro")
  Re: bottling beer in wine bottles/methode champenoise (Jonathan Nail)
  re: Belgian Ale Styles (Clifton Moore)
  Re:  Too much foam from corny keg (Clifton Moore)
  IBUs (Laurel Maney)
  Re: Fluid Flow Study Comments (John Palmer)
  10 GALLON BATCH (David Monday)
  Aging cold? (The Greenman)
  Grainger and Corks (AlannnnT)
  Pre-prohibition brews (Robert Paolino)
  Re: Henry Weinheardt's Amber / pH Test strips ("Brian Dixon")
  Partial filling of corny keg (Henry Paine)
  Lauter Tun Fluid Mechanics (Jim Bentson)
  Re: Stainless Scrubbers (Jim Bentson)
  Refractometer use (Jim Wallace)
  40Gallon steam boiler and new system (Jim Wallace)
  Recipe Conversions (Alisa Johnson)
  Philly Competition (birman)

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---------------------------------------------------------------------- Date: Sat, 31 Oct 1998 00:47:12 EST From: AKGOURMET at aol.com Subject: Source for SS Scrubbies Fred Nolke, Anchorage wrote: >>Has anyone seen stainless steel scrubbies recently? Lots of copper >>in stores and as someone recently posted, lots of lint filters. I'm >>sure my local HB shop would order a bunch if he knew where to find them. Check your local kitchen store. Scanpan cookware includes a large stainless steel scrubbie with each of their pots and pans, so any store that stocks that line should have replacements. Also, RSVP (a kitchenware wholesaler in Seattle) distributes SS scrubbies in 2-packs. These are the ones I prefer to use as a filter on the end of my racking cane. They are smaller and have a finer mesh than the Scanpan scrubbies. Bill Wright Juneau, AK Return to table of contents
Date: Sat, 31 Oct 1998 07:33:46 -0800 From: John_E_Schnupp at amat.com Subject: re: Fixing chipped enamel / drain valves >Here's what I ended up doing. snip >"fender washers". I cut two 1-1/2 inch pieces of 3/4-inch copper pipe >longitudinally, flattened them out, and cut them in two. This gave me >four 1-1/2 inch by 1-1/4 inch copper plates. I drilled 1/2-inch holes in >the plates and reamed them out so they would slip over the compression It might have been easier to use end caps. They are usually a little thicker copper that the pipe. A 3/4" or 1" end cap should work. I'd probably use the 1" as it is larger. After the hole is drilled simply cut the flat end off with a Dremel tool or hack saw, the Dremel is my tool of choice, I think it is the best thing since beer :-) Not trying to criticize or say you did it wrong, just throwing out another idea. When it come to making special fittings, adapters and various other hardware there are many ways to skin the cat. >Again, thanks to everybody for the information. I'd welcome any >observations on the safety of using epoxy, enamel paint, etc. on the >inside of boiling pots. I don't know about epoxy but I just got some *super* solder that I mail ordered. It's supposed to solder almost all metals and says it's lead and cadmium free. I haven't tried it yet but if it works a advertised, it should be great for soldering my brass ball valve onto my aluminium brewpot (it's already threaded but I'd like a more secure connection) John Schnupp, N3CNL Colchester, VT 95 XLH 1200 Return to table of contents
Date: Sat, 31 Oct 1998 10:55:31 -0500 From: Dan Cole <dcole at roanoke.infi.net> Subject: Strange break formation Brewsters, This weekend I was brewing my second batch of my "I will never brew this again" Pumpkin Ale, and experienced a strange hot-break. Halfway through my batch sparge, the flow slowed and then stopped completely. OK, stuck sparge, that's expected with 2 cans of pumpkin in a 2.5 gallon batch of beer. So I dug up the mash bed (can you say paste?), let resettle, recirculated and started my sparge again. Meanwhile, to prevent overdue evaporation, I slowed my boil on the first half of the sparged wort to just a simmer for about 20 minutes. By the time I stared sparging the second half, my simmering wort now had a layer of almost-waxy scum (probably had a heck of a lot of junk from the pumpkin) on its barely moving surface. Using a shallow bowl, I skimmed off the scum and added the second sparge. Now I didn't start my boil timer until all second wort was in the boil kettle, so it had another 60 minutes at a good rolling boil, but I didn't have anything approximating that first floating scum. Has anyone seen anything like this before? Also, with an n=1, let me do some unfounded speculation... could the additional movement due to a rolling boil actually work against you when you have a very dirty wort (roughly handled adjuncts) by keeping the junk/break stirred up and not allowing the material to float to the top where it can coagulate more and then be skimmed off? Drawing unfounded conclusions with insufficient information, Dan Cole Roanoke, VA Return to table of contents
Date: Sat, 31 Oct 1998 08:06:49 -0800 (PST) From: Domenick Venezia <demonick at zgi.com> Subject: Sloshing wort In HBD #2862, Chris P. Frey said, " ... Assuming the headspace is indeed filled with CO2, is there any reason to concern oneself with violently shaking and rocking the carboy, thus rousing the little yeasties awake? What say yea?" This technique is called "rousing the yeast" and I've done it almost since I started brewing and I've seen no signs of any problem. While I don't "violently shake" the carboy, I do vigorously swirl the contents. Usually I do this morning and evening for a few days toward the end of the fermentation and then let the carboy (primary or secondary) settle out for a day or two before bottling/kegging. And yes, the airlock can REALLY get chugging along! Rousing the yeast can help push the fermentation a few more points, by getting the drowsy yeast cells up off the bottom where nutrients are depleted and back into the wort where nutrients may remain. Rousing smooths out any local areas of depleted nutrient(s) and gives all the still waking yeasties a shot at those last few molecules of goodies. Tweaking the yeast is a good idea, but another important and useful effect of rousing is to reduce the amount of CO2 in solution. This will yield more consistent carbonation when bottling. At room temperature the solubility of CO2 is about 1 volume. At 68F (20C) it is actually 0.88 volumes, but that's for water at standard temperature and pressure - 1 volume is a good rule-of-thumb. After fermentation the beer is supersaturated with CO2 and any disturbance will cause foaming. This is simply precipitation of a solute much like a supersaturated sugar solution will grow crystals. Bubbles are "crystals" of CO2. You can swirl the carboy until it stops foaming but as long as the fermenter is airlocked you can not swirl out CO2 below the saturation point. CO2 will precipitate out of solution until the concentration is lowered to the saturation point which is about 1 volume. At the saturation point the only way to get more CO2 out of solution is to raise the temperature or lower the pressure. So if you swirl an airlocked fermenter until it stops foaming (or foams minimally) you can assume that you have 1 volume of CO2 in solution and calculate your priming rate from there. Using this technique can make your batch to batch priming results more consistent because the amount of CO2 that you start with will be more consistent. It will also reduce foaming during bottling. Cheers! Domenick Venezia Computer Resources ZymoGenetics, Inc. Seattle, WA demonick at zgi dot com Return to table of contents
Date: Sat, 31 Oct 98 11:22:29 PST From: "George De Piro" <gdepiro at fcc.net> Subject: Long-term storage of yeast Hi all, While Jim L.'s commentary about yeast storage was a tad abrasive, he did raise an interesting point: is using phophate buffer as the storage media an invitation for contamination? I have been storing yeast on slants (I have one strain in distilled water and will move my whole collection to either distilled water or phophate buffer after this contamination issue is resolved). A slant is about as nutrient-rich a media as a bug can find, yet I have not had any problems with bacterial contamination of my slants (as evidenced by streaking the yeast from my slants onto differential media). Perhaps there is something I am missing, and phophate buffer would be more bactria-friendly than my slants? Comments from microbiologists are welcome Have fun! George de Piro ("What's the difference between biologists and and microbiologists?" "I don't know; I think they are smaller.") with apologies to Spinal Tap... Return to table of contents
Date: Sat, 31 Oct 1998 09:23:39 -0800 From: Jonathan Nail <jnail at dvdexpress.com> Subject: Re: bottling beer in wine bottles/methode champenoise "Tomusiak, Mark" wrote: Subject: Re: bottling beer in wine bottles >>You definitely need to wire the corks down, as the >>pressure generated during conditioning will force >>the corks out and leave a mess wherever you stored >>them. The other beauty about using champagne bottles is the fact that you can affix a bottle cap to the top of the bottle. Thus having to do away with "wiring down" the cork, at first. This will prevent leaking, keep the escaping gas in and makes for a cleaner storage period. Then when your bottles are close to serving, you can then choose to use Matthew's idea of using the top of a mushroom cork as a spacer and add the wire cage. Remove the bottle cap carefully. Put the spacer (mushroomed cap on top) and put a new wire cage (can be purchased at most homebrew/winemaking shops). Use the end of a sturdy chopstick or thin painter's brush to "twist" the new wire cage close. This will save your fingers and any other hardware you choose to use. Practice a bit on an empty bottle with a cork and spacer/wire cage. I believe 3 and 1/2 turns will fit the cage nicely to your bottle and prevent flyaways (which is really dangerous). Again, the advantage of using champagne bottles (which come in various sizes) is that you can use a regular wine cork (as well as synthetic corks) and cap them to keep leakage and flyaways down. And on the subject of champagne bottles. Has anyone tried a real methode champenoise (sp?) with something like beer or mead? Results? Messes? Make your wife run screaming from the house??? Cheers, Jonathan Return to table of contents
Date: Sat, 31 Oct 1998 10:55:54 -0900 From: Clifton Moore <cmoore at gi.alaska.edu> Subject: re: Belgian Ale Styles Rob, I too am experiencing the same response after a spring '98 visit to Holland and a short time in Belgium. "I must try to make some of this", was my most recurrent thought. I have yet to take it on, but have collected several yeasts in preparation. I am counting on the yeast to be a primary contributor to the product. I would characterize the results I am looking for as: relatively smooth mouth feel in a big (OH %) brew, with effervescence; almost a Champagne like bubble profile. But then there is that issue of the candy sugar. What is with this? Can I use table sugar? And then the use of un-malted barley; how important is this? Lets hope we can get some threads going on this. I can contribute that I have had good results from harvesting bottle yeast off of Corsendonk, Chamay, and Westmalle. Clifton Moore cmoore at gi.alaska.edu Return to table of contents
Date: Sat, 31 Oct 1998 11:12:34 -0900 From: Clifton Moore <cmoore at gi.alaska.edu> Subject: Re: Too much foam from corny keg The one instruction I offer to users of my kegs is, "mash the handle full on". Any attempt to limit foam by slowly squeezing a glass out of the spigot only results in a glass full of foam. Clifton Moore cmoore at gi.alaska.edu Return to table of contents
Date: Sat, 31 Oct 1998 14:22:01 -0800 From: Laurel Maney <maney at execpc.com> Subject: IBUs Louis Bonham wrote: The *only* way to know your IBU's is to physically measure them in the finished beer. Once you have this data for several beers, you will probably have a decent idea of what *your* utilization rates are for *your* system and procedures, and thereafter you could tweak Tinseth/Garetz/Rager's formula to give more accurate guesses. But the bottom line is that the only way to know your IBU's is to measure them. This is by far the best summary I've seen about calculating BUs or predicting the results of a given addition of hops. You have to get the analysis in order to know your own system's utilization; from there you can dial in what you want by making 'best approximation' adjustments. Here's a really simple equation: A mg iso/L x B Liters x 100 mg alpha/C mg iso x 100 mg hops/D mg alpha = mg hops A = BU defined as mg isoalpha acids per liter in finished product B = liters of cooled wort (knockout volume x .96 for shrinkage on cooling) C = your overall utilization D = alpha acid content of the hops that really works. The beauty of it is that you measure BUs in the finished beer, so the utilization factor automatically takes in post kettle effects. Get the analysis, and solve for C under a couple of different conditions. Then you can extrapolate, using the same equation to figure out the quantity of hops for a desired BU. Do a separate calculation for each hop, if the alphas are different. Adjust the utilization rate for different timing of additions. (By the way, I gotta love the metric system when it comes to BUs.) So where do you get a cheap and convenient analysis? In Wisconsin, Milwaukee Area Technical College - Brewing Program expects to offer this service in Spring of 1999. Stay posted. Return to table of contents
Date: Sat, 31 Oct 1998 14:01:01 -0800 From: John Palmer <jjpalmer at gte.net> Subject: Re: Fluid Flow Study Comments Thank you for all the kind words, I have received many comments and I am glad this will be of some use. Several people have written wondering what I think about false bottoms and the behavior of the wort to the single outlet tube. I pretty much said it all in the original post. It's a good question, I am not sure. How does the model apply to round coolers and sankey kegs? Good question. If you have a square or rectangular manifold in it, then the model probably applies to a large degree with differences due to the changing distance to the wall. With a round manifold (like I have: 8" dia of 5/8 tube) there probably is more of an r^3 relationship of the proximity a volume of wort sees to the drain. There are obviously positions in the grain bed that are equidistant from the entire circle and thus have a lot of potential. And it is probably more complicated than that. I suppose I will try to model it one of these days... The other question in Saturdays HBD about extraction efficiency between 1, 2, or 3 pipes is also a good one. Obviously, people have been getting good results from the Easymasher for several years now. It is a single tube manifold. Likewise, there are many people who have complained about low efficiency with it, and multi-tube manifold systems. There are those who swear by a change to a false bottom system, and those who curse the day they switched. What I am trying to say is that there must be a certain amount of technique involved to making any system work well. I think that more pipes allow better coverage of the grainbed so you don't have to employ as much skill (or luck) to get a good extraction. To better answer this question, we really need to do some side by side experiments with the same mash and control as many variables as possible. Heat, outflow rate, geometry, inlet area, constant head, etc. Not easy and it's one reason why I used corncobs. Perhaps some very resourceful club might like to do such an experiment. John Palmer Palmer House Brewery and Smithy page http://www.realbeer.com/jjpalmer/ Return to table of contents
Date: Sat, 31 Oct 1998 15:19:11 -0800 From: David Monday <dmonday at thegrid.net> Subject: 10 GALLON BATCH Dear fellow homebrewers, I am unsure which is the best technique for obtaining the needed boil volume for a 10 gal batch (I am very new to all grain brewing)- 1. 1) Do I increase the volume of sparge water used, or simply add water to the boil kettle to obtain my boil volume? Does it really matter which method is used if the OG obtained is the same? My gut feeling is to sparge with 5 gal, then dilute the wort in the boil kettle to reach boil volume and OG. 2. 2) This question is for another matter that I have read conflicting info on: Are the malted grains available today considered "modified" to the extent that a one step infusion mash is all that is necessary? I have read that a protein rest performed on todays malted grains could diminish the "head" on your resulting brews, and that the procedure is no longer "necessary". Yet, in the Williams Brewing Catalog, only a couple of malts are listed as "fully modified", which leaves me to question this article (I may have read it at BT on-line). Thank you in advance for any suggestions and help on these questions (e-mail response is fine). Return to table of contents
Date: Sat, 31 Oct 1998 04:53:07 -0700 From: The Greenman <greenman at sdc.org> Subject: Aging cold? Greetings fellow brewers, This is half a question. A while ago I brewed an extract European Ale. After weeks of waiting, (around 5 or so) I finally tasted it. It was probably the closest thing I've ever had to repulsive in homebrew. I aged it another 2 or so weeks, and again, awful. another month, and still awful. The esters were terrible, the diacetyl flavor overpowering, and another taste that was somewhat akin to chewing on pine. (Please don't ask how I know what chewing on pine tastes like) I know exactly what went wrong. I had a week where I wasn't able to pay attention to the temp, and it was too high (during fermentation). I was in the hospital, and the temp was in the 76 range. Well, I forced myself to drink the stuff, and it even became mildly drinkable if it was chilled to near freezing. Well, I forgot about a few beers I had put in the fridge for, and after a few weeks of sitting there, I tried one. It was gorgeous. I wish I had kept the whole batch. I couldn't figure it out. But I had been reading on how alt-beir is aged cold, so I found a bottle of the stuff that I had left in warm storage, and chilled it for a few hours. The warm stuff tasted awful. The cold stuff tasted wonderful. Has anyone else had the same results? or similar? Am I just nuts? Are there certain beers that aging cold is better for? Or should I start keeping all my beers in the fridge for an extended period of time? comments? Greenman .-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-. T. Daniel "Greenman" Griffin "Knowledge is the herald of Sorrow" "When it is dark enough, you can see the stars" Student/Spod/ANGSTer/Brother/SysAdmin '-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-' Return to table of contents
Date: Sun, 1 Nov 1998 08:36:14 EST From: AlannnnT at aol.com Subject: Grainger and Corks There is some discussion of buying controls and pumps from Grainger, the mega- distributor. If you do not have a Federal ID or sales tax number, you may not be able to buy from Grainger. You can buy from Grainger at regular Grainger catalogue prices through their secondary supply method. Grainger gives True Value and Servistar hardware stores a discount from their catalogue price. You can ask your local hardware store to get your Grainger items for you. The hardware store can then buy the item from Grainger and sell it to you at the catalogue price and make a (very) small markup. Hardware stores are under no obligation to deal with Grainger, and the profit margin is small, but maybe for an occasional homebrew, you'll make a friend and a good helper out of your local hardware store owner. Some hardware store owners may not even be aware of this discount program. The program is only a couple years old, and many stores would not otherwise need to use Grainger as a source. These discounts were 'negotiated' by the national management of True Value and Servistar and Coast to Coast (called Tru Serve Corporation) and are available to all store owners in the organization. You may be the first person to tell the store owner he can buy from Grainger at discount, so you might get a funny look at first. About corks. I find that the corks that are called 'pore filled' leak less and cost about the same as the regular corks. I have used them for wine with good results. They don't require as long a soak either. An hour or less should do it. In case you have not guessed, I am a True Value member. I am not trying to promote True Value or any affiliate store. I am only disseminating information you may find useful. Alan Talman Homebrewer, beer geek, and True Value member store owner Return to table of contents
Date: Sun, 1 Nov 1998 10:34:37 -0600 (CST) From: Robert Paolino <rpaolino at execpc.com> Subject: Pre-prohibition brews I'm going to trying posting this one more time.... > Date: Thu, 29 Oct 1998 09:09:33 -0500 > From: Jeff Renner <nerenner at umich.edu> > To: rpaolino at earth.execpc.com > Subject: Re: Homebrew Digest #2862 (October 29, 1998) > > Bob > > I don't know if you keep up on HBD. I could answer the question in > paragraph 2 of the post below but I thought you'd do it better regarding > [snip] > >Date: Wed, 28 Oct 1998 12:13:13 -0400 > >From: Gordon Strong <strongg at earthlink.net> > >Subject: Classic American Pilsner > > [snip] > > >Are there any credible commercial versions of this style (particularly > >in the midwest)? One of the perks of judging (and brewing for that > >matter) is getting to sample these little-known styles. But I'm looking > >for examples that might be more accessible to non-brewers/judges. > >Anyone? > > > >Gordon Strong > >Beavercreek, OH > The Wisconsin Brewers Guild did a project with "pre-prohibition" beers as a Wisconsin Sesquicentennial promotion. (It was similar to the Oregon pale ale thing at the craft brewers' conference.) Participating members of the WBG brewed a beer according to a somewhat flexible recipe guideline and were supplied with the grain (6 row and white corn) and hops by the sponsors. Kirby Nelson, brewmaster at Capital Brewery of Middleton (Madison), Wisconsin developed the recipe based on early 20th century brewing logs from a large Milwaukee brewery, modified (pun not intended) to reflect today's ingredients. Ingredients, target OG and IBU ranges were specified; ale or lager yeast was at the discretion of the brewer. The brewers who participated served the beers at their pubs/draught accounts and all had them at the Great Taste of the Midwest<sm> (in August) for patrons to sample. Those who still had some left served it at the Wisconsin Brewers Guild fest (in September). To my knowledge, no one bottled it... sorry. Before all the details came together, I included a preliminary discussion of the project in an article in Great Lakes Brewing News (if you don't already receive it or otherwise missed the article, contact Bill Metzger at glbrewing at aol.com, to ask about purchasing back issues), and I'm going to be writing a post-project story on it for publication elsewhere if there's an interested publisher ;-) As Gordon said, done right these can be damn fine beers and I had a few personal favourites of the bunch. You won't find any available now, but some of the brewers may repeat them as a seasonal brew for sometime in the future. Capital's Kirby Nelson liked the beer (and the reception by the pub-patronising public) so much he is looking at the idea of going through the whole label approval thing to make it again as a bottled product. I had a couple of pints with Jeff "Now go have a prepro" Renner when he was on his way through Wisconsin, and Jeff absolutely loved the Capital product that was on tap at the bar where we met to have those pints. I don't know whether he got to sample any of the others during his Badger State travels. I'd mention some of my other favourites, but the only one that I _know_ is likely to be available again is the Capital. I'll leave it at saying that there were some other very good ones, both lagers and "lager-like" ales, some similar to each other and others quite distinct from the others. Now go have a beer, Bob Paolino rpaolino at earth.execpc.com Madison I can taste my beer. Can you? Bland Beer is the Worst Sort of Tyranny! Don't drink bland industrial swill; it only encourages them to make more. Return to table of contents
Date: Sun, 1 Nov 1998 10:43:35 -0800 From: "Brian Dixon" <mutex at proaxis.com> Subject: Re: Henry Weinheardt's Amber / pH Test strips >BTW: There is a new brewer amongst us. Her name is Nicole Diane >Christian. She was born Sept. 17--healthy and happy. This is one brewer >who is counting his blessings: thanks god for a healthy child, barley, yeast, >hops, and water ;-O! > >Keith >Chattsworth CA >kchris1 at lausd.k12.ca.us ... Might as well start brewing only at night. You're going to be up anyway ... Signed, Father of Two (and going on a decade of interrupted sleep ...) (Brian) Return to table of contents
Date: Sun, 01 Nov 1998 13:06:39 -0600 From: Henry Paine <hpaine at iglobal.net> Subject: Partial filling of corny keg I'm finally making the switch to kegging. Is it possible to fill a 5 gal. keg only half full and bottle the rest of your batch? Thanks for any info. Hank Henry C. "Hank" Paine, Jr. hpaine at iglobal.net Return to table of contents
Date: Sun, 01 Nov 1998 15:14:32 -0500 From: Jim Bentson <jbentson at longisland.com> Subject: Lauter Tun Fluid Mechanics Hi All: I had not read the digest for about a week and in catching up, I started to write a comment on the many posts regarding the fluid mechanics of lauter-tuns when I saw John Palmers great post. I was in the process of posting my own opinion that the best way to analyze this problem was precisely what John did, i.e. build a transparent lauter tun and use dye to track the streak lines. I would like to congratulate John on a terrific job. The experimental photos that he got clearly show the true flow in the tun under actual lautering conditions. Regarding the modelling, as John found out and stated in his post, his first model based on Darcy's law was not really applicable to the situation being studied. From a fluid mechanics standpoint, his second model is close to what is known as a "Two Dimensional Sink" flow that is based on inviscid potential flow. I am in the process of sending John a rather lengthy E-mail discussing this and will delay commenting on this modeling until later. I would like to point out a number of things that have immediate practical implications: 1) John's manifold layout is not ideal. As he found out, you do not want the "drain" point very far from the wall. The reason is quite simple, if the straight line path from the top of the grain bed to the drain is considerably shorter than the flow path down the outer edge and along the bottom (i.e. as it is with a shallow bed or large area tun) then , assuming the resistance in the grain bed is proportional to flow length, the outer edges of the tun represent a much longer path from surface to drain and consequently will flow slower on average than the center due to increased resistance. This will appear to give "preference" to the portion of grain above the drain which can clearly be seen in John's time lapse photos. From a fluid mechanics point of view, John's tun would have worked better if he ran his straight manifold pipes parallel to the long dimension (the length) rather than the short dimension ( the width) as he would have reduced the distance from the drain to the wall in both cases. Most of the designs I have seen published use this arrangement rather than John's. 2) John's photos show that even with the "better" geometry of two manifolds, it takes about ten minutes for the flow to establish itself at the edges , i.e. when the dye actually reaches the bottom near the edges, indicating vertical flow that has finally reached the bottem.This has important implications about the rate of lautering and clearly shows why we all should avoid rapid draining of the lauter tun. If you use Narziss' optimal value of 0.18 gals/min/sq ft of tun area ( which is for commercial cylindrical tuns) then for a 12" diameter tun ( typical of a 5 gal batch ) you would collect 6.36 gals in 45 minutes. This is within our normal guideline of 45 - 60 minutes for lautering used by homebrewers. For larger batchs your tun will be proportionately wider and the collection time will still be about the same. 3) John's experiments are most applicable to rectangular coolers. The flow in a cylindrical cooler or tun would be an axisymmetric flow rather than two-dimensional as in this John's case. While these two types of flow often look similar in cross-section, they can be quite different in terms of the magnitude of spatial changes ( gradients). If a reasonable math model evolves from all this, this geometry effect will be trivial to account for. 4) Regarding John's comments on false bottoms, the flow under a false bottom is flow through a multiple orifice plate into a plenum much like the injector plates of a rocket engine. Since the volume under the false bottom is a "fluid only" region, and due to the low vertical velocity of the flow in the grain bed, the flow under the plate acts like a Sink flow and can be modelled as such. As the height of the false bottom above the tun bottom is reduced, the flow gets more three dimensional and harder to analyze. [BTW . The volume INSIDE the "Easymasher screen is also a plenum in that it is a region of pure fluid with lower flow resistance than the grain bed. This makes the collection 'region more distributed in space than the slots of a copper manifold and will also lead to slightly more uniform collection flow fields] 5) John's results shows that the larger the number of drains and the more that the drain collection points are evenly distributed over the tun floor the more the flow will be uniform through the grain bed. This support's what I would have suspected based on many years of working in fluid mechanics. To this end , when I built my tun, I use an "H" arrangement in my 13" diameter cylindrical tun, with an "Easymasher" knockoff at the 4 tips of the "H" and a center tap on the bar of the "H" to feed the collected flow to the outside world. This "knockoff" design is much larger than Jack Schmidling's design. I use stainless screen with 1/16" wire spacing. I rolled these into 3/4" diameter by 4" long cylinders and seal the open "far" end of each of them with a 1/2" long , 3/4' dia. stainless bolt and a hose clamp. Works great. I got the idea of multiple "Easymashers" from the fact that the lauter tun in the micro-brewery I worked in used 4 drain points under the false bottom rather than one. This got me thinking about the need to get a uniform collection pattern rather than using a single centrally located collection point and hence my "H - Masher" was born. This distribution of collection points is also what a false bottom does. Again, I would like to give John a standing ovation for the tremendous job he has done. This work will be quoted frequently and John should be properly recognized as the author in any such quotes Jim Bentson Centerport NY Return to table of contents
Date: Sun, 01 Nov 1998 12:35:24 -0500 From: Jim Bentson <jbentson at longisland.com> Subject: Re: Stainless Scrubbers Recently Fred and Sue Nolke asked<fnolke at alaska.net> >Subject: Scrubbies and Malt Freshness > >1. Has anyone seen stainless steel scrubbies recently? Lots of copper >in stores and as someone recently posted, lots of lint filters. I'm >sure my local HB shop would order a bunch if he knew where to find them. Fred and Others: Here on Long Island almost every supermarket carries both Copper and Stainless pot scrubbers under the "Chore Boy" label. They are in the section with steel-wool pads. They cost about $1.40 for two scrubbers. Try asking your supermarket to special order them for you. The company that makes the Chore Boy brand can be reached via snail-mail at Reckett and Coleman Inc Wayne NJ 07474-0945. As a last ditch effort, if anyone out there really needs them and can't get them I would be willing to send them for the cost plus postage but please try your supermarket manager or writing to the company first. Jim Bentson Centerport NY Return to table of contents
Date: Sun, 01 Nov 1998 17:22:18 -0500 From: Jim Wallace <jwallace at crocker.com> Subject: Refractometer use I have been spoiled... during my last brewing session I was lucky enough to have the use of a refractometer for gauging my OG.. I am now looking for any input from those who have had experience with some of the less expensive instruments ($95-$125) ___________________________________________ JIM WALLACE ... jwallace at crocker.com http://www.crocker.com/~jwallace ___________________________________________ Return to table of contents
Date: Sun, 01 Nov 1998 17:33:29 -0500 From: Jim Wallace <jwallace at crocker.com> Subject: 40Gallon steam boiler and new system during a recent auction trek I came up with a great deal on a boiler ..a 40 gallon steam kettle all set up with an electric steam generation system ($75) ... problem is it calls for 3 phase service which is just not included in my basement any ideas on working with this boiler ??? my thoughts so far are: ... ignoring the electric and putting a burner under it, it already has the sight glass pressure guage and blow off valve ... finding an alternate source for steam?? (I have a steam heating system already in my basement) I already have a 30 gallon fermenter (height to width 2:1) with both bottom and side drains but still looking for mash tun for the system.. thinking about using my HLT for mash temp boost any suggestion welcome here ___________________________________________ JIM WALLACE ... jwallace at crocker.com http://www.crocker.com/~jwallace ___________________________________________ Return to table of contents
Date: Sun, 1 Nov 1998 16:34:37 -0500 From: aj at zebra.net (Alisa Johnson) Subject: Recipe Conversions I appreciate HBD for the excellent forum it has provided for the advancement of homebrewing. I was wondering if anyone would be so kind to provide me with some advice? How much grain would I need to make a stout from an extract stout recipe. E.G.: 4 #, Mountmellick Irish Stout Extract 3 #, Munton Fison Amber DME Does Papazian say 1.3# of grain for every pound of dried malt and 1.1# of grain for every pound of extract syrup? Any help would be much appreciated. Sincerely, Kurt Roithmayr kurtr at zebra.net Return to table of contents
Date: Sun, 01 Nov 1998 21:11:13 -0500 From: birman at netaxs.com Subject: Philly Competition The main competition for the Philly Hombrewers has been moved up to the spring so in place this fall (Novbember 15, 1998) we are having a more free form competition. The criteria for this competition will be- Is it clean?, Is it good?, Is it well balanced?--Beer style be damned!entries will be judged in the following categories:Ale, Lager, Other, Cider & Mead, and subsets: Light , Amber, Dark, Strong. Classic styles are still welcome, within the criteria. So the gloves are off, restrictions are off- and may the best beer win! details can be found at: http://www.netaxs.com/~shady/hops/archives/events/199811.html For further information please call Home Sweet Homebrew at 215-569-9469, or e-mail Nancy at homesweet at voicenet.com. Judges may register with Joe Uknalis by email at birman at netaxs.com. HOPS BOPS will also be holding a benefit raffle in memory of Mark Johnston, a local National BJCP judge. Mark was tragically killed in an automobile accident last summer. We will be donating the proceeds from the raffle tickets to his wife and family in his memory. For all those who had the opportunity to know Mark or to judge with him, his loss leaves a void amongst our community of homebrewers. His wry wit, good humor and exurburance for the hobby always made him a welcome addition to any competition. Raffle tickets may also be purchased by mail or phone for those wishing to help get his family through this horrible loss. Return to table of contents
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