A simulation-based tool developed to allow the DOE Institutional
Conservation Program (ICP) staff and participants to reliably determine
the energy savings directly attributable to ICP-supported retrofit
measures implemented in a building. RESEM (Retrofit Energy Savings
Estimation Model) calculates long-term energy savings directly from actual
utility data, with corrections for weather and use variations between the
pre-retrofit and post-retrofit utility data collection periods.
Keywords: retrofit, institutional buildings
Expertise Required: Moderate level of computer literacy; familiarity with building energy concepts.
Users: Over 50.
Audience: Building managers and energy retrofit engineers.
Input: Minimal required input includes: original year of building construction, total floor area, building type, utility data for both pre- and post-retrofit periods, and a description of the installed retrofit measures. Detailed building component description data may also be entered. All data are entered and viewed through a DOS-based graphical user interface.
Output: Long-term energy consumption and retrofit savings for each fuel type.
Computer Platform: PC-compatible running MS-DOS.
Programming Language: C with third party user interface library
Strengths: Interactive user interface tailored to the retrofit energy savings estimation process, complete simulatable building description generated from minimal user input, fast embedded simulation engine, semi-automated process for tuning building simulation to measured utility data, numerous retrofit measures can be automatically applied to the building description.
Weaknesses: Restricted to standard 640K of RAM.
Availability: Through the web site.
U.S. Department of Energy
Last updated: 24 March 1997