Novel methodology toward nearly zero energy building (NZEB) renovation: Cost-effective balance approach as a pre-step to cost-optimal life cycle cost assessment

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Reaching environmental targets set by the European Union (EU) requires a constant renovation of the existing building stock to nearly Zero Energy Buildings (NZEB) in a cost-optimal manner. Studies show that the renovation rate of the existing building stock is more than two times less than what is necessary to reach the targets. Furthermore, the majority of performed renovations across the EU reach just a small amount of energy savings, whereas NZEB renovations are rarely achieved. This paper proposes a methodology for the evaluation of renovation measures, aiming to provide decision support related to the selection of what to renovate and to what extent. The proposed method is rooted in the well-established cost-optimal methodology, yet it suggests a prestep to package evaluation. This is done by means of a simplified cost-effective parameter (CEP), linking cost, lifetime, and energy savings. The methodology is demonstrated using a case study building in Denmark. The results show that the CEP provides good grounds for the compilation of single actions to packages. Further developments could focus on the sensitivity of the model inputs and integration of additional evaluation parameters to cost, such as environmental, architectural, comfort, risk, etc.

Original languageEnglish
Article number4141
JournalApplied Sciences
Volume11
Issue number9
ISSN2076-3417
DOIs
Publication statusPublished - 30 Apr 2021

Keywords

  • Assessment method
  • Cost-effective renovation
  • Energy efficiency cost
  • NZEB renovation
  • Renewable energy cost
  • Residential renovation

Fingerprint

Dive into the research topics of 'Novel methodology toward nearly zero energy building (NZEB) renovation: Cost-effective balance approach as a pre-step to cost-optimal life cycle cost assessment'. Together they form a unique fingerprint.

Cite this