A multi-objective optimization model for determining the building design and occupant behaviors based on energy, economic, and environmental performance

Taehoon Hong, Jimin Kim, Minhyun Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)


Buildings are becoming considerably more energy-efficient and thus achieving greater thermal comfort. This study was conducted to develop an optimization model that simultaneously takes into consideration the occupants’ thermal comfort, thermal energy consumption, and life cycle economic-environmental values. To this end, a multidisciplinary approach was adopted involving the analysis of the thermal comfort and thermal energy consumption through the EnergyPlus, and the quantification of the economic-environmental values through a life cycle cost analysis and life cycle assessment analysis. For the validation of the proposed model, a case study was conducted. A library facility in a monsoon climate as the target was chosen for this. A total of 4.26 × 1012 possible building design scenarios (31 window types × two ventilation types × 812 (eight set points: 18–25 °C, 1 °C intervals per month)) were generated and used to calculate the optimal building design solution. Based on the tables for making a better decision, trade-off analyses among the five optimization objectives were conducted. In terms of efficiency, the results showed that the time required for determining the optimal solution was only 2 s for each scenario, excluding the EnergyPlus running time. The proposed model may therefore be applied to other energy-saving techniques and buildings.

Original languageEnglish
Pages (from-to)823-834
Number of pages12
Publication statusPublished - 1 May 2019


  • Economic and environmental assessment
  • Energy
  • Indoor environmental quality
  • Multi-objective optimization
  • Occupant behavior
  • Thermal comfort

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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