[BLDG-SIM] Validation of simulation predictions

[Joe Huang]

Validation of simulation predictionsEd is referring to a study that Fred Winkelmann, Rene Meldem, and I did for the California Institute of Energy Efficiency back in 1993. The attached abstract is from the Simulation Research Group Web site. The full report is available only on paper.

Joe Huang


LBL-37979     COMPARISON OF DOE-2 WITH MEASUREMENTS IN THE PALA TEST HOUSES 
Abstract: 
The predictions of the DOE-2 program for building energy analysis have been compared with measurements in the Pala test houses near San Diego, California. This work is part of the California Institute for Energy Efficiency's "Alternatives to Compressor Cooling in California Transition Zones" project in which DOE-2 is being used for parametric analysis of cooling strategies that reduce peak electrical power in hot and dry climates. To establish the validity of DOE-2 for this kind of analysis the program was compared with room air temperature measurements in a "low-mass" however with conventional insulated stud wall construction and a "high-mass" house with insulated concrete walls. To test different aspects of the DOE-2 calculation, four different unconditioned thermal configurations of these houses were considered: unshaded windows, shaded windows, white exterior surfaces, and forced night ventilation. In all cases, DOE-2 agreed well with the air temperature measurements, with a mean deviation between simulation and measurement ranging from 0.2 to 1.0K depending on configuration and type of house. Using a development version of DOE-2, comparisons with inside surface temperature measurements were also made. These comparisons showed good agreement. 

  ----- Original Message ----- 
  From: Edward F. Sowell 
  To: BLDG-SIM at gard.com 
  Sent: Thursday, June 26, 2003 7:38 PM
  Subject: [BLDG-SIM] Validation of simulation predictions


  Peter,

  One study that comes to mind quickly is a comparison of results from the "solar test cells" at Poway, CA
  with DOE-2, perhaps in the early 80s. Fred Winkelmann at LBNL can perhaps provide specifics. These
  tests were under controlled circumstances rather than actual building. But, IMHO, comparisons
  with field data from occupied buildings will have so many uncontrolled and confounding factors as to
  be meaningless.

  Ed Sowell

     Can anyone point me to papers that discuss the validation of whole building energy models (DOE2 or others) with measured building data? I am looking for papers discussing the accuracy that can be achieved for both simulations based on comprehensive energy audits of existing buildings and simulations based on design documents that are then compared to measured performance of the building after occupation.

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