The Cottage Smallholder


stumbling self sufficiency in a small space

Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
12v greenhouse ventilation solar
Wed 27-Jun-12
10:39 pm
Avatar
fatfatjake
UK

1st Grader
Members

New members
Forum Posts: 3
Member Since:
Wed 27-Jun-12
sp_UserOfflineSmall Offline

Hi all I'm planning making a 12v solar fan powered ventilation system for my greenhouse / glasshouse

 

My plan is to use a 12v car battery

 

a 12v computer fan,

 

A Thermostatic switch

http://www.ebay.co.uk/itm/130469371806?ssPageName=.....146wt_1163

A 12v solar trickle charger for the car battery

http://www.ebay.co.uk/itm/4-Watt-12v-Volt-Solar-Pa.....4347wt_905

 

The greenhouse has a automatic opening window, which will open at 15 to 25 C

 

The fan will come on at about the same temp, is this a practical setup?

 

Thanks

 

Jake

Thu 28-Jun-12
6:47 am
Avatar
Aly
Normandy France

Supreme Being
Members

New members
Forum Posts: 9421
Member Since:
Sun 2-Oct-11
sp_UserOfflineSmall Offline

Welcome to the forum Jake. wave
Bit technical for my brain but there some inventive bods here who will be able to help. You are obviously into self sufficiency and it would be good to hear a bit about you. There is an introduction page you could post on. Lots of us are doing for ourselves and not just in the UK. Hope you will stick around smile

Trying to enjoy life as it is

http://www.letertregites.com

Thu 28-Jun-12
2:10 pm
Avatar
Xahha
Suffolk

Supreme Being
Members

New members
Forum Posts: 4231
Member Since:
Mon 3-Oct-11
sp_UserOfflineSmall Offline

How big is the greenhouse?- a computer fan is very small, so not sure if that will be enough to ventilate it. I am sure the set up will function- depends on what wattage the solar power panel can give out- have one on my caravan to trickle charge the battery to keep the alarm functional, but at times even this is not enough to hold the charge. I think mine is 15 W from memory.

 Are we having fun yet? I am!

Sat 30-Jun-12
7:24 pm
Avatar
fatfatjake
UK

1st Grader
Members

New members
Forum Posts: 3
Member Since:
Wed 27-Jun-12
sp_UserOfflineSmall Offline

8 x 6 foot

 

The fans are only 0.16 amp

 

Was playing with the idea of putting two in one set to in one to out to generate more flow

 

both on the same wall in opposite corners and sides so one top left the other bottom right

 

Cheers

 

Jake

Sat 30-Jun-12
7:46 pm
Avatar
Xahha
Suffolk

Supreme Being
Members

New members
Forum Posts: 4231
Member Since:
Mon 3-Oct-11
sp_UserOfflineSmall Offline

I think you can only try and see what happens- and if it works, let us all know- it may be something we can all copy.

My greenhouse is a similar size to yours.

 Are we having fun yet? I am!

Sat 30-Jun-12
10:52 pm
Avatar
Toffeeapple
North Bucks

Members

Moderators
Forum Posts: 16217
Member Since:
Tue 22-Sep-09
sp_UserOfflineSmall Offline

fatfatjake said: 

 two in one set to in one to out to 

I have read this section seven times and it still makes no sense what so ever - - -are you speaking binary here?  Eight times now - still no idea.

I'll try that again!

Sun 1-Jul-12
5:30 am
Avatar
ep
Bulgaria

Supreme Being
Members

New members
Forum Posts: 3967
Member Since:
Mon 7-Jun-10
sp_UserOfflineSmall Offline

I saw ebay and thought...advert....so moved on...sorry...if I'm wrong Jake...

Who lives long sees much : The diary of my life in Bulgaria

Sun 1-Jul-12
3:21 pm
Avatar
fatfatjake
UK

1st Grader
Members

New members
Forum Posts: 3
Member Since:
Wed 27-Jun-12
sp_UserOfflineSmall Offline

@ EP.....No advert 

 

@ Toffeeapple ......Hope this makes it bit clearer

 

1 fan making air go inn top right corner

1 fan making air go out bottom left corner

Thus creating air movement as well as flow and ventilation

 

May be able to make it cheaper by using the auto window to become the switch also, and just using a push switch

 

Try and make something and post back later in the week

Mon 2-Jul-12
6:03 am
Avatar
Danny
Scarborough, England
Admin
Forum Posts: 5514
Member Since:
Sat 12-Aug-06
sp_UserOfflineSmall Offline

Interesting idea, Jake. I am less technical with electrics than Martin (Liquineer) is but I understand your objective. This is a question for somebody with a bit of an electrical engineering background who may understand the flow rates and power consumption of fans.

I guess at worst your set-up may not be effective enough and you might have to go for a bigger fan even at a slower RPM.

Do please update us as you make progress.

Never knowingly underfed

Mon 2-Jul-12
6:39 am
Avatar
seth
lincolnshire fens

Councillor
Members

New members
Forum Posts: 1380
Member Since:
Fri 10-Sep-10
sp_UserOfflineSmall Offline

wave As warm air rises would it not be more effective to reverse the in and out ?what_the_heck

Seed catalogues are responsible for more unfulfilled fantasies than the web and playboy combined . (after Michael Perry)

Forum Timezone: Europe/London

Most Users Ever Online: 262

Currently Online:
22 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

brightspark: 10485

danast: 10232

Aly: 9421

Sooliz: 7980

Hattie: 6920

Ambersparkle: 6665

JoannaS: 4800

Terrier: 4518

eileen54: 4396

Xahha: 4231

Member Stats:

Guest Posters: 9

Members: 15369

Moderators: 2

Admins: 2

Forum Stats:

Groups: 6

Forums: 25

Topics: 2246

Posts: 122513

Newest Members:

AntoshkaSof, Freemanwat, sanhvcVah, Jeromejeods, breckjensen, Dennisreick

Moderators: Toffeeapple: 16217, AdminTA: 10

Administrators: fn: 321, Danny: 5514


Copyright © 2006-2012 Cottage Smallholder      Our Privacy Policy      Advertise on Cottage Smallholder