KitchenKatalog

Justin & Meredith Winokur's Kitchen Cooking Notebook

Sitemap · Our Recipe Book · Steven's Recipe Book · Ann's Recipe Book · Meal Ideas · Copied Recipes
Random · Random Links

Home > pages > notes > homebrew > fermentor-from-2013-08-08.html

Fermentor (from 2013-08-08)

/pages/notes/homebrew/fermentor-from-2013-08-08.html

You are viewing revision ad141888 from 2018-03-29 20:57:33 -0600 (specified "2018-03-29 20:57:33 -0600"). See current version and other versions

Links are to the current pages which may not exist or have changed. ID-based links may not work. Internal links have [@rev] links to this revision or add ?rev=ad141888 to a URL. See the help page for more information.

I wanted to be able to get a good estimate of my final wort volume from the fluid level in the fermentor. I taped apiece of paper_flush with the counter and the fermentor wall_ and I added a cup of water at a time. I shined a flashlight into the liquid so I could see the line and I noted it.

I made a cubic regression in Matlab. Linear looked okay until you looked at the error and saw that the error was not evenly distributed.Quadratic looked fine but I knew from the math, that the volume is related to r^2*h and h is related to r. Basically, a cubic is what the math says. Below is my data and the final Matlabcoefficients:

fermentor_fit

V(h)=c0 + c1h + c2h^2 +c3*h^3

c0:-1.695513348027587

c1:1.399445832910603

c2:0.018361545876323

c3:-0.000225590344486

The data is below:

Height (cm)

Volume (cups)

1.8

1

2.65

2

3.3

3

3.8

4

4.55

5

5.2

6

5.75

7

6.4

8

7.15

9

7.65

10

8.15

11

8.85

12

9.5

13

10.1

14

10.6

15

11.25

16

12.35

18

13.55

20

14.6

22


This page was converted from Wordpress with a custom script by Justin Winokur. Most links and images should still work. However, if any links are broken, see the HTML (or Markdown) source to try to deduce the intended destination.

Original WP Post ID: 6504

Original WP Pub Date: 2013-08-19_114733