Paper Conference

Proceedings of Building Simulation 2011: 12th Conference of IBPSA


Understanding Net Zero Energy Buildings: Evaluation of load matching and grid interaction indicators

Jaume Salom, Joakim Widen, José A. Candanedo

Abstract: Although several alternative definitions exist, a NetZero Energy Building (Net ZEB) can be succinctly described as a grid-connected building that generates as much energy as it uses over a year. The “net-zero” balance is attained by applying energy conservation and efficiency measures and by incorporating renewable energy systems. While based on annual balances, a complete description of a Net ZEB requires examining the system at smaller time-scales. This assessment should address: (a) the relationship between power generation and building loads and (b) the resulting interaction with the power grid. This paper presents and categorizes quantitative indicators suitable to describe both aspects of the building’s performance. These indicators, named LMGI - Load Matching and Grid Interaction indicators, are easily quantifiable and could complement the output variables of existing building simulation tools. The indicators and examples presented here deal only with electric generation and loads.
Pages: 2514 - 2521