Full Description

The most recent version of DOE-2, the Department of Energy’s major computer program for building energy analysis, includes three new capabilities that make the program a state-of-the-art tool for analyzing cogenerafion systems in commercial and residential buildings. First, the internal representation of the electricity generators available for cogeneration has been modified to permit easier specification of full- and part-load performance. Second, the algorithms used to allocate loads to the prime movers have been modified to permit modeling of more sophisticated operating strategies, including thermal load following. Third, DOE-2 can now accurately evaluate the economics of cogeneration, because the program can now accommodate sophisticated electric utility tariffs, including time-of-use rates, demand charges with ratchets, and the sell-back of electricity mandated by the Public Utilities Regulatory Policies Act. Examples of these capabilities are presented with results from a study of the economics of cogeneration in a hypothetical hotel building, using current utility tariffs and weather data from Southern California.

Units: Dual

Citation: Symposium, ASHRAE Transactions, 1988, vol. 94, pt. 1, Dallas, TX