[BLDG-SIM] Inlet water temperatures

[Griffith, Brent]

NREL researchers Craig Christensen and Jay Burch put together a useful correlation for mains water temperature for the Building America Benchmark.  It is in the conference paper:
 
Hendron, R., Anderson, R., Christensen, C., Eastment, M., and Reeves, P.  2004.  "Development of an Energy Savings Benchmark for All Residential End-Uses", Proceedings of SimBuild 2004, IBPSA-USA National Conference, Boulder, CO, August 4 - 6, 2004. 
 
The correlation is also now in EnergyPlus V1.2.2 and documented in the Engineering Reference.
 
Brent
 
 

-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com]On Behalf Of Rich Brown
Sent: Wednesday, June 29, 2005 12:26 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Inlet water temperatures


For the purposes of modeling residential water heating energy use, 
can anyone suggest a source for annual average water inlet temps 
(from the municipal water system)? 
I've been using the annual average outdoor dry-bulb (offset by a few degrees) 
or estimated shallow ground temperatures in the TMY2 files, but these don't 
seem to give plausible values in cold climates like Alaska 
(annual averages are well below freezing, even at 4m depth). 
(a related question might be how they get piped water in places with ground 
temperatures that low). 

thanks, 
Rich Brown 
--------------------------------------------------------------- 
Rich Brown * REBrown at lbl.gov 
Energy Analysis Department * Phone: (510) 486-5896 
Lawrence Berkeley National Laboratory * Fax: (510) 486-4247 
---------------------------------------------------------------



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