Effective Moisture Penetration Depth Model for Residential Buildings: Sensitivity Analysis and Guidance on Model Inputs

Research output: Contribution to journalArticlepeer-review

21 Scopus Citations

Abstract

Moisture buffering of building materials has a significant impact on the building's indoor humidity, and building energy simulations need to model this buffering to accurately predict the humidity. Researchers requiring a simple moisture-buffering approach typically rely on the effective-capacitance model, which has been shown to be a poor predictor of actual indoor humidity. This paper describes an alternative two-layer effective moisture penetration depth (EMPD) model and its inputs. While this model has been used previously, there is a need to understand the sensitivity of this model to uncertain inputs. In this paper, we use the moisture-adsorbent materials exposed to the interior air: drywall, wood, and carpet. We use a global sensitivity analysis to determine which inputs are most influential and how the model's prediction capability degrades due to uncertainty in these inputs. We then compare the model's humidity prediction with measured data from five houses, which shows that this model, and a set of simple inputs, can give reasonable prediction of the indoor humidity.

Original languageAmerican English
Pages (from-to)216-232
Number of pages17
JournalEnergy and Buildings
Volume165
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

NREL Publication Number

  • NREL/JA-5500-68907

Keywords

  • Building energy modeling
  • Effective moisture penetration depth
  • Humidity
  • Moisture
  • Moisture buffering

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