RemRate allows for a ground source heat pump and you can couple it to the domestic hot water system.  However I need to convert the Water Furnace's 5.0 COP to an equivalent EF.  Any ideas?????

Views: 329

Reply to This

Replies to This Discussion

One would be tempted to put in 500%, but refrain, the stated COP is just for the unit, not the HP system, which will include pumping power and other distribution losses.  Probably system COP closer to 3.

Hi Elizabeth -- If you look at the last page of this article (http://www.luntmarymor.com/condensing_heaters.pdf), you'll see a nice description of how EF is measured.  From this, and factoring in the additional consumption that Michael mentioned, you can probably come up with a reasonable approximation of the EF for your scenario.  The toughest part may be to figure out the standby losses, if the DHW is a tank-type system.

Note that in REM the EF is entered as a decimal, not a percentage -- and for a heat pump, the decimal will be larger than 1.0.

I was looking at REM/Rate and the GSHP only needs COP entered. It looks like you only need to model the type of water heater you are using for EF and also check desuperheater in the heat pump section if they are coupled.
Also to add the pump watts. Are you using the GSHP to supply 100% of the domestic hot water?
Thanks for the help.  Didn't want to reinvent the wheel if someone had already been down this path.

RSS

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Amber Vignieri liked tedkidd's discussion What if more efficient homes were actually worth more?
2 hours ago
Amber Vignieri posted a blog post
3 hours ago
Eric Kjelshus replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"I have been using air advice for 5 yr or so - I end up with a report in 35 min I can e-mail or show…"
5 hours ago
Profile IconBill Gartner, Shane Matteson, Jay Cooper and 1 more joined Home Energy Pros
5 hours ago
Kim Burnett commented on Diane Chojnowski's group Home Energy Pros on Twitter
"Good morning, would you please add me. Thank you. Kim Burnett A+ Abundant Energy Experts"
yesterday
Kim Burnett joined Diane Chojnowski's group
Thumbnail

Home Energy Pros on Twitter

We've created a twitter list of members of Home Energy Pros who tweet about home performance and…See More
yesterday
Luke Langhals replied to Luis Hernandez's discussion ERV Configuration
"Very good reading. Thank you for posting this."
yesterday
Luke Langhals replied to Diane Chojnowski's discussion Poll: How confident do you feel about the future of home performance?
"This poll would change on a day to day basis :) I'm cynical one day and extremely optimistic…"
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service