This discussion forum is to attempt to answer Steve's question regarding better ways to model domestic hot water systems.  Here is his question.

 

"Things appear rather quiet over here in Building Simulations, so I thought I might stir up some discussion on the subject of DHW storage temps, as they apply to dishwasher usage. Cruise on over to "Top-10 just launched" on the home page under Forums and go down to "comments" where J.C. and I went somewhat off topic with a discussion of DHW temps. I'm reasonably sure simulations would support maintaining DHW @ 115-120 F, and using electric heat in the DW to boost the temp as the most energy efficient approach, but have found no difinitive study. I suspect this issue has been settled, but would appreciate your thoughts and the results of any simulations you may have run or encountered. "

Views: 57

Replies to This Discussion

Perhaps time to put this situation aside and move on. While I never did locate a rigorous study, the sheer volume of information advocating booster electric heat in the dishwasher vs maintaining a higher DHW storage temp would seem to support the former as the preferred approach. I believe Energy Star DW's use less than 10 gallons of dihydrogen monoxide and the delta T should be on the order of 20-25 degrees, so probably no big deal...unless your fuel source is dollar bills.

Still, would have liked to see results from running a "what if" program...

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Home Energy Magazine posted a discussion

Home Energy's Sept/Oct issue is live!

The September/October issue is now live on …See More
8 hours ago
Home Energy Magazine posted a blog post

Twenty-First-Century Energy Efficiency—with Carbon on Our Minds

After the first oil embargo, in 1973, our nation recognized the need to save…See More
8 hours ago
Eric Guldenstein joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
11 hours ago
Diane Chojnowski added a discussion to the group Habitat for Humanity
Thumbnail

Central Missouri Habitat for Humanity "Zero Energy" House

A net zero home in Columbia Missouri. Affordable, efficient, and attractive. Lile Engineering…See More
17 hours ago
Crosbey Archery posted photos
19 hours ago
Benjamin Mailian replied to Kevin Eigel's discussion What is the best energy auditing software?
"This is an old post but it's still very relevant so I thought I'd give our app a mention…"
23 hours ago
Profile IconMarissaCortese, Justin Tyrrell, McHale Insulation and 1 more joined Home Energy Pros
yesterday
Diane Chojnowski replied to Jose Macho's discussion Google Sunroof Project- Where Are They Going with Solar?
" "
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service