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2005-06 Seminars


Towards Systemic Analysis of Building Energy Systems

Chris Marnay
Berkeley Lab

Abstract
Currently building energy systems are designed and built almost in isolation one from another. The heat and electricity supplies, for example, are not obviously interconnected, except to the extent that electricity it needed to drive pumps and fans, etc. While not really a disruptive technology, small-scale (< 1-2 MW electric) combined heat and power for buildings necessitates a rethink of the traditional approach. In this work, a systemic model of building energy use is developed and demonstrated. The Distributed Energy Resources Customer Adoption Model (DER-CAM) is a pure cost minimizing approach that minimizes the total energy bill of a building over a test period, typically an historic year. Because occupancy is low in commercial buildings, the economics of self-generation is often not compelling and cooling which is endogenous to electricity use is typically the most lucrative load to serve by CHP, solving building energy systems to find optimal on-site generation, heat recovery, and cooling equipment proves very challenging.

Slides