skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: HAMT extension for EnergyPlus encompasses moisture sources due to air leakage

Abstract

As building envelopes become more energy efficient, new buildings are more prone to hygrothermal failure. The combined Heat and Moisture Transfer (HAMT) model in EnergyPlus is able to provide moisture profiles through multiple material layers of an envelope assembly using a coupled, one-dimensional, finite element model simulating the movement and storage of heat and moisture. However, HAMT is currently unable to properly assess the effects of moisture sources inside an assembly to determine impacts on durability, indoor air quality, and energy performance.This paper reviews existing tools for modeling moisture sources due to air leakage and the HAMT model equations in EnergyPlus. A sub-model is then developed that enables air leakage to be applied to a moisture sink/source at an arbitrary location by extending the existing mass transfer equation with a source term that includes water vapor deposit from air flow through an assembly. We demonstrate use of this model, discuss limitations, and make the source code publicly available for external use.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1494004
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: ASHRAE Winter Conference - Atlanta, Georgia, United States of America - 1/12/2019 5:00:00 AM-1/16/2019 5:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Antretter, Florian, and Pallin, Simon B. HAMT extension for EnergyPlus encompasses moisture sources due to air leakage. United States: N. p., 2019. Web.
Antretter, Florian, & Pallin, Simon B. HAMT extension for EnergyPlus encompasses moisture sources due to air leakage. United States.
Antretter, Florian, and Pallin, Simon B. Tue . "HAMT extension for EnergyPlus encompasses moisture sources due to air leakage". United States. https://www.osti.gov/servlets/purl/1494004.
@article{osti_1494004,
title = {HAMT extension for EnergyPlus encompasses moisture sources due to air leakage},
author = {Antretter, Florian and Pallin, Simon B.},
abstractNote = {As building envelopes become more energy efficient, new buildings are more prone to hygrothermal failure. The combined Heat and Moisture Transfer (HAMT) model in EnergyPlus is able to provide moisture profiles through multiple material layers of an envelope assembly using a coupled, one-dimensional, finite element model simulating the movement and storage of heat and moisture. However, HAMT is currently unable to properly assess the effects of moisture sources inside an assembly to determine impacts on durability, indoor air quality, and energy performance.This paper reviews existing tools for modeling moisture sources due to air leakage and the HAMT model equations in EnergyPlus. A sub-model is then developed that enables air leakage to be applied to a moisture sink/source at an arbitrary location by extending the existing mass transfer equation with a source term that includes water vapor deposit from air flow through an assembly. We demonstrate use of this model, discuss limitations, and make the source code publicly available for external use.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: