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: 59

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

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Amber Vignieri posted a blog post

Relay Network Targets Multifamily Housing Upgrades Nationwide

Affordable apartment buildings are home to more than 10 million American households, making them a…See More
29 minutes ago
Tom White's video was featured

Robby Schwarz on Builder Collaboration

Hear Robby Schwarz, of EnergyLogic discuss the value Owens Corning brings to Thrive Home Builders.
4 hours ago
Profile IconLights N More, John Kamas and Chuck Santeler joined Home Energy Pros
5 hours ago
Crosbey Archery liked Don Hynek's discussion Testing "Magic Pak" units??
6 hours ago
Crosbey Archery joined Norm Bourassa's group
Thumbnail

Multifamily Buildings

For too long there has been relatively little EE focus on multifamily, but some new programs have…See More
6 hours ago
Crosbey Archery liked Crosbey Archery's blog post Energy Tips - Fresh Look at Heating and Cooling the Home
6 hours ago
tedkidd liked Luis Hernandez's discussion Airsealing an old basement ceiling
13 hours ago
Ryan T De La Rosa posted a blog post

The Clean Power Plan and What You Can Do

Last month, Jessica Hardcastle at Environment Leader described an especially non-polarizing…See More
15 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service