EcoRenovator  

Go Back   EcoRenovator > Improvements > Geothermal & Heat Pumps
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 02-20-15, 07:17 PM   #11
Mikesolar
Master EcoRenovator
 
Mikesolar's Avatar
 
Join Date: Aug 2012
Location: Toronto
Posts: 958
Thanks: 40
Thanked 158 Times in 150 Posts
Default

I just ordered the driver from Pololu for $7 which is pretty cheap. This process will take some time as i have to determine how well the subcooled temp can track the outdoor temp or even if it has to. The old system I am copying only has the bulb on the liquid line and no other control (other than defrost). It will be interesting to see if an EEV with one sensor can emulate a traditional valve and bulb.

Mikesolar is offline   Reply With Quote
Old 02-21-15, 03:59 AM   #12
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,423
Thanks: 427
Thanked 618 Times in 516 Posts
Send a message via Yahoo to jeff5may
Default

A head pressure sensor is cheap assurance of accuracy. Just a single (or double) thermometer takes lots of trial and error to make the valve track reality. Most equipment mfrs state that pressure sensing at least doubles precision, even after dsp or modeling parameters.

Is this for your milk cooler valve heat pump? I am curious about it. I was waiting for some info on the beast, as it looks attractive in the sense that only one valve works both heating and cooling modes. Somewhat the same end result as EXV/EEV without additional electronics to be invented/made. Randy and Brad got their heat pumps going well enough to save ample energy, my window shaker finally shook itself to death before I could complete an autonomous controller for it.
jeff5may is offline   Reply With Quote
The Following User Says Thank You to jeff5may For This Useful Post:
buffalobillpatrick (02-21-15)
Old 02-21-15, 05:24 AM   #13
Mikesolar
Master EcoRenovator
 
Mikesolar's Avatar
 
Join Date: Aug 2012
Location: Toronto
Posts: 958
Thanks: 40
Thanked 158 Times in 150 Posts
Default

Yes it is for the milk cooler project but other than for defrost, there is no cooling function (in my application). For a better description of it, look up westinghouse HiReLi. There isn't a lot of info around and you have to dig for it but it is there.

Mikesolar is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design