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

  • Salom J
  • Widén J
  • Candanedo J
 et al. 
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Abstract

Although several alternative definitions exist, a Net- Zero 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 buildings 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.

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Authors

  • Jaume (Irec) Salom

  • Joakim Widén

  • José a Candanedo

  • Igor Sartori

  • Karsten Voss

  • Anna Joanna Marszal

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