Mike's Brew Shop Fermentation System Project

h1. Mike's Brew Shop Fermentation System

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The goal of this project is to create a beer fermentation system that is temperature controlled using off the shelf hardware and open source software and by trying to keep the cost down.  The following picture gives the *"Big Picture"* of the project.

h2. Big Picture Of The Project

!{width:70%}http://173.177.31.197:10084/attachments/download/18/Big_Picture.jpg!

h2. Description

A pump will be controlled by the Arduino Uno to send the cooled liquid inside the 50' cooper coil.  The coil will be cooling the water inside the bucket surrounding the carboy, hence cooling the wort inside the carboy. The "Assembly" will be located into an insulated chamber to help keep the temperature. The temperature we are aiming for is between 10°C and 18°C, by providing a setpoint to the Arduino Uno controller. The first version of the temperature control algorithm will be based on the reading of the temperature of the wort inside the carboy using the thermowell. The algorithm is simply an on/off based on a hysteresis value, which will be also provided to the controller.

Using the RF communication, all the readings of all the parameters are going to be sent to the server (Raspberry Pi) and logged into a Influxdb database.

h2. Hardware

h3. Non-electronic

h3. Electronic

h3. Tools required

A *beer fermentation system* is composed of:

* *1 aruino uno board* (and all the required hardware is described in the Wiki tab)

* *1 pump* 

* *3 thermocouples*

* *1 50' cooling coil*

* *1 big bucket*

* *1 6.5 gal carboy*

* *1 thermowell*

* *1 fermentation chamber*

* *1 cooled liquid source* (in my case it's a keezer)

There is one thermocouple inside the beer wort, one in the surrounding water that cools the wort and one in the fermentation chamber to get the ambiant temperature.

The pump control is base upon these 3 temperature. The controller receives a setpoint and try to maintain it reliably and accuratly. In version 0.0.1 only the temperature inside the thermowell that measures the beer wort temperature will be used to control the pump.

Communitcation with the server (*raspberry pi*) is done using *nRF24l01* board and it's corresponding libraries. More information is available in the Wiki.

h2. Software

h3. Controller

h3. Server

h2. Cost

There is also a *cost* section in the Wiki for those who are willing to put a system like this together.