Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > DIY Projects > Conical Fermenter cooler/chiller (peltier)
Reply
 
LinkBack Thread Tools
Old 05-18-2012, 09:34 AM   #1
mysobry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Ivrea, Italy
Posts: 81
Liked 16 Times on 8 Posts

Default Conical Fermenter cooler/chiller (peltier)

Hi
I have moved the discussion in a specific thread form the thread dedicated to fermentation chamber peltier cooled since the two project, a part from cooling technology, have different solutions and development.

The idea is to use an immersion water chiller inside the conical fermenter and recirculate cold water. The cooling is provided by a peltier air-water heat exchanger using a technology for PC watercooling (overclocking CPU)

I have sourced a surplus COOLIT freezone…that was made by a Canadian company. I got it from a surplus ebay auction



The basic principle is very simple the cool water is recirculated inside the conical fermenter via a stainless steal coil and is cooled by the peltier cells.



The coolIT exchanger is a very nice piece of engineering…very compact, colplete with pump, peltier cells, reservoir, fan…and it comes with a controller board that can control the power applied to the 6 cells and the speed of fun/pump according to set point and current measured temperature. So I expect that once the worth has reached the target temp the power will be adjusted in order to compensate just the heat produced by fermentation and loss of the system





The unit can be controlled by software PC via USB but it can works also stand alone…it is possible also to log temperature and power during the whole time !

The stainless steel coil has a diameter of 20cm and an height of 30cm. The pipe is 8mm OD , 7mm ID. The terminal are 90degree bended in order to exit the side wall of the fermenter so all the coupling and fittings are external (safer !). Two compression fittings keeps the coil in the canter of the fermenter



In order to avoid dispersion I have insulated the fermenter (both the side wall and the cone) using a foil of polistirolo and some neoprene.



Than after some trial I have substituted the original small 12V pump with a bigger one capable of 500l/h. The pump is a Thermaltake P500 pump and the fittings again comes from the PC modding / watercooling thecnology. It’s very low noise with ceramic bearings for long term usage. It’s compatible with high flow systems utilizing ID 6.4mm(1/4”) and 9.5mm(3/8”) tubing.



Last addition is a water reservoir..it’s very usefull when you fill the circuit and for eliminating bubble in the flow. It’s very compact and transparent so you can se water flowing. It has 4 1/4’’ port one used for the inlet, one for the outlet , one for temperature sensor and the top one for refilling.



I have also added a small water temperature monitor with a sensor inside the reservoir. It is not connected to the control board that has it’s own sensor but is just to monitor the temp without connecting to the PC via USB. The small circuit in front of the thermometer is a DC-DC step down converter in order to have 5V supply form 12V main power supply.





Here is the complete assembly. Up to now I have tested the fan, the controller and the water recirculation and it works fine…very compact , low noise, easy to mange. In order to complete the test I need to connect a proper power supply (12V -150-200W0 and I’m waiting for the delivery)

next post hopefully some results and experimental data
enjoy
Davide

__________________
mysobry is offline
ClaudiusB Likes This 
Reply With Quote Quick reply to this message
Old 05-18-2012, 02:30 PM   #2
microbusbrewery
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
microbusbrewery's Avatar
Recipes 
 
Join Date: Jan 2011
Location: West Jordan, UT
Posts: 1,140
Liked 87 Times on 67 Posts
Likes Given: 44

Default

That's a pretty sweet setup! It's definitely more compact than a traditional fermentation chamber.

__________________
http://www.microbusbrewery.org/
microbusbrewery is online now
 
Reply With Quote Quick reply to this message
Old 05-18-2012, 06:12 PM   #3
wyzazz
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: Atwater, OH
Posts: 4,263
Liked 39 Times on 39 Posts
Likes Given: 48

Default

Nice, it will be interesting to see how it performs. Thanks for the write up!

__________________
Quote:
Originally Posted by Revvy View Post
And I'd like to see my 1.080 beers ready from grain to glass in a week, and served to me by red-headed twin penthouse pets wearing garter belts and fishnet stockings, with Irish accents, calling me "master luv gun," but we can't always get what we want can we? :)
wyzazz is offline
 
Reply With Quote Quick reply to this message
Old 05-20-2012, 08:34 PM   #4
mysobry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Ivrea, Italy
Posts: 81
Liked 16 Times on 8 Posts

Default performance

At the end of the day after few tunings and mechanical/hydraulic optimization I succeed in testing the system.

Saturday I have brewed 30L of ESB and I had the chance to cool it in the new fermenter.

the video below show you details of the rig (as soon I have time I try to insert some label in English)


As far as performance concern it seem to work fine.. the temperature was dropped from 21C to 19.5C (my set point) in less than an hour...than the temperature was stable and the power applied to the pletier cells at the minimum (40%).

One point that I have to verify is that the controller software doesn't allow me to set minimum power=0 the lower value accepted is 40%...this could be an issue if the room temperature is not so hot the 40%of power continuously applied even if you reach the set point could lead temperature too low..
I have to verify this point when fermentation starts to produce heat..menwhile I try to contact the manufacturer in order to see if there is any chance to set lower limit =0

The system generally speaking is very compact, easy to manage, and …hi tech !

I will let you know further progress
Stay tuned
Davide
__________________
mysobry is offline
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 08:43 AM   #5
mysobry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Ivrea, Italy
Posts: 81
Liked 16 Times on 8 Posts

Default final set up

Some more picture with the final set up...all components have been have been tighten on the base and some neoprene foil have been inserted in order to reduce noise and thermal transfer








do you like it ?

Davide

__________________
mysobry is offline
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 09:57 AM   #6
Pilgarlic
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Tampa Bay, Florida
Posts: 1,304
Liked 126 Times on 99 Posts
Likes Given: 36

Default

This is a gag, right?

__________________
Pilgarlic is online now
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 10:01 AM   #7
ChandlerBang
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2010
Location: Earth
Posts: 3,038
Liked 24 Times on 23 Posts
Likes Given: 2

Default

Quote:
Originally Posted by mysobry View Post

do you like it ?

Davide
Very nice. What is the maximum theoretical BTU/hr rating on that?
__________________
Quote:
Originally Posted by D_Struct View Post
I would've made a crayon schematic if I thought this was going to hang people up.
ChandlerBang is offline
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 10:44 AM   #8
mysobry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Ivrea, Italy
Posts: 81
Liked 16 Times on 8 Posts

Default

Quote:
Originally Posted by Pilgarlic View Post
This is a gag, right?
Sorry I don't catch the question...maybe is my not so good english...but the project and the implementation is very serious and....it works !
__________________
mysobry is offline
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 11:19 AM   #9
wyzazz
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: Atwater, OH
Posts: 4,263
Liked 39 Times on 39 Posts
Likes Given: 48

Default

This is very cool, once you've given it a good run through you should submit it to BYO Magazine.

__________________
Quote:
Originally Posted by Revvy View Post
And I'd like to see my 1.080 beers ready from grain to glass in a week, and served to me by red-headed twin penthouse pets wearing garter belts and fishnet stockings, with Irish accents, calling me "master luv gun," but we can't always get what we want can we? :)
wyzazz is offline
 
Reply With Quote Quick reply to this message
Old 05-21-2012, 01:20 PM   #10
mysobry
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Ivrea, Italy
Posts: 81
Liked 16 Times on 8 Posts

Default some numbers and figures

Quote:
Originally Posted by ChandlerBang View Post
Very nice. What is the maximum theoretical BTU/hr rating on that?

Thank you for the compliment…I term of performance I have not calculated a sophisticated thermodynamic model…my approach was more empirc based on what I’m able to source on the surplus market at a reasonable price. Nevertheless some figures are available and I’m pleased to share..maybe you can help me in a math model.

I’m not familiar with US/GB unit measurement so everything is expressed in wat, Celsius etc..



The core of the unit are 6 peltier cells that are rated 72W maximum power..this is the absorption…I discovered that are under powered in order to work in a safer condition. Some PC modding project overpowered the cells or substituted with more powerful one.



According to this graph the unit is capable to dissipate around 120W with 0 delta to ambient temperature…so assuming that 30L of fermenting wort produce 100W heat you can cool at room temperature…If you want to go below room temperature you can dissipate 50W with 10C delta..

From my experimental test I was able to cool the fluid with no “load” (empty fermenter) up to 10-11 Celsius with 22C ambient.

One point that I’m still investigating is that the minimum power unit that you can configure via control software is 40%...even if the temp reach the set point the control unit still apply a minimum power of 40%...that is not so low..infact with water experiment I had a temperature slowing decreasing. In case of fermentation I’m still verifying if the heat produced by the fermentation compensate the 40% minimum power…I’m also investigating with the manufacturer if I can configure the minimum = 0



Last graph is related to thermal resistance according to power @100W it’s 0.1W/C that if I understand the number is quite low compared other cooling system (air-air)

Hope this data are useful..maybe we can start a more analytic thread for dimensioning peltier cells in such an application

Davide
__________________
mysobry is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Conical Fermenter Chiller/Heater Build JasonO DIY Projects 46 02-21-2014 01:28 AM
Simple Conical Fermenter Cooler Idea. Will this work? 18DPA DIY Projects 14 05-01-2012 02:25 PM
Fermentation Control with Peltier Cooler? Brewing Clamper DIY Projects 14 01-31-2012 03:21 PM
Peltier cooler given to me rcrabb22 DIY Projects 3 01-23-2010 02:32 PM
Peltier fermenter cooler using water heat exchangers mattd2 DIY Projects 13 10-01-2009 04:30 AM