Methodology for design decision support of cost-optimal zero-energy lightweight construction

Mohamed Amer, Mohamed Hamdy, Thomas Wortmann, Ahmed Mustafa, Shady Attia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The interest to find cost-optimal zero-energy solutions for building, using multi-objective optimization, has risen dramatically over the last decade. Accordingly, several studies have been carried out, proposing new methods and tools. None, however, has introduced a simplified approach that is viable by a broader range of users. This study addresses this lack, offering a methodology that supports the decision making process on cost-optimal zero energy building, using a novel approach, namely Multi-Objective Parametric Analysis (MOPA), rather than optimization algorithms. This study adds to the domain of roof stacking construction by setting the weight of construction as a third objective. The current methodology is applied to a newly developed theoretical Reference Building (RB) for a Belgian passive roof stacking house. Different options of the building's superstructure components (walls, roof, and windows) have been examined. MOPA follows three consecutive steps: modeling setup, parametric simulation, and ends up with evaluation and selection. The results show cost-optimal zero-energy and lightweight packages of design variables for the building envelope.

Original languageEnglish
Article number110170
JournalEnergy and Buildings
Publication statusPublished - 15 Sept 2020
Externally publishedYes


  • Building performance
  • Multi-objective optimization
  • Roof stacking
  • Simulation
  • Solution space
  • Urban densification


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