Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Reducing reliance on deterministic asset ratings to improve the operational energy performance of buildings

Minu Agarwal 1, Parag Rastogi 2, George Mavromatidis 3
1 CEPT, Ahmedabad, India
2 arbnco Ltd., Glasgow, UK
3 ETH Zurich, Switzerland

Abstract: Deterministic building rating methods that rely on standard operating conditions to rate an asset encourage designers to focus on the building envelope and systems. However, the energy performance of buildings and their systems varies greatly with weather and usage/occupancy. This variation is often classified as an unavoidable performance gap, and is a by-product of an evaluation process that assesses performance under a limited set of conditions. If rating methods take the expected performance variation into account, they could lead to more pragmatic and effective design decisions. This paper examines an example early-stage planning design decision using deterministic and probabilistic approaches towards compliance. A sample decision is examined to show how the design decisions would differ under the two different compliance regimes. Since buildings are expected to have limited robustness in practice, we discuss the challenge of enforcing probabilistic compliance measures after occupancy and show potential solutions for continuous evaluation and enforcement in practice.
Keywords: Design Decisions, Uncertainty, Probabilistic Compliance Metrics
Pages: 3342 - 3349