Hygrothermal Performance Assessment on Bamboo Building Envelope in Typical Climate Regions

2019 ◽  
pp. 189-221
Author(s):  
Zujian Huang
Keyword(s):  
Performance Assessment ◽  
Building Envelope ◽  
Hygrothermal Performance

Simultaneous hygrothermal performance assessment of an air volume and surrounding highly hygroscopic walls

2019 ◽  
Vol 148 ◽  
pp. 677-688 ◽  
Author(s):  
Thomas Busser ◽  
Mickael Pailha ◽  
Amandine Piot ◽  
Monika Woloszyn
Keyword(s):  
Performance Assessment ◽  
Air Volume ◽  
Hygrothermal Performance

PERFORMANCE INDICATORS FOR ENERGY EFFICIENCY RETROFITTING IN MULTIFAMILY RESIDENTIAL BUILDINGS

2019 ◽  
Vol 14 (2) ◽  
pp. 109-136
Author(s):  
Chaitali Basu ◽  
Virendra Kumar Paul ◽  
M.G. Matt Syal
Keyword(s):  
Energy Efficiency ◽  
Performance Assessment ◽  
Performance Indicators ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Building Envelope ◽  
Assessment Process ◽  
Second Phase ◽  
A Priority

The energy performance of an existing building is the amount of energy consumed to meet various needs associated with the standardized use of a building and is reflected in one or more indicators known as Building Energy Performance Indicators (EnPIs). These indicators are distributed amongst six main factors influencing energy consumption: climate, building envelope, building services and energy systems, building operation and maintenance, occupants' activities and behaviour, and indoor environmental quality. Any improvement made to either the existing structure or the physical and operational upgrade of a building system that enhances energy performance is considered an energy efficiency retrofit. The main goal of this research is to support the implementation of multifamily residential building energy retrofits through expert knowledge consensus on EnPIs for energy efficiency retrofit planning. The research methodology consists of a comprehensive literature review which has identified 35 EnPIs for assessing performance of existing residential buildings, followed by a ranking questionnaire survey of experts in the built-environment to arrive at a priority listing of indicators based on mean rank. This was followed by concordance analysis and measure of standard deviation. A total of 280 experts were contacted globally for the survey, and 106 completed responses were received resulting in a 37.85% response rate. The respondents were divided into two groups for analysis: academician/researchers and industry practitioners. The primary outcome of the research is a priority listing of EnPIs based on the quantitative data from the knowledge-base of experts from these two groups. It is the outcome of their perceptions of retrofitting factors and corresponding indicators. A retrofit strategy consists of five phases for retrofitting planning in which the second phase comprises an energy audit and performance assessment and diagnostics. This research substantiates the performance assessment process through the identification of EnPIs.

Experimental and numerical thermal performance assessment of a multi-layer building envelope component made of biocomposite materials

2020 ◽  
Vol 214 ◽  
pp. 109846 ◽  
Author(s):  
Beñat Arregi ◽  
Roberto Garay-Martinez ◽  
Julen Astudillo ◽  
Miriam García ◽  
Juan Carlos Ramos
Keyword(s):  
Performance Assessment ◽  
Thermal Performance ◽  
Building Envelope

scholarly journals Highly Insulated Wall Systems with Exterior Insulation of Polyisocyanurate under Different Facer Materials: Material Characterization and Long-Term Hygrothermal Performance Assessment

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3373 ◽  
Author(s):  
Emishaw Iffa ◽  
Fitsum Tariku ◽  
Wendy Ying Simpson
Keyword(s):  
Performance Assessment ◽  
Control Strategy ◽  
Energy Efficient ◽  
Material Characterization ◽  
Air Leakage ◽  
Material Development ◽  
Hygrothermal Performance ◽  
New Construction ◽  
Wood Frame

The application of exterior insulation in both new construction and retrofits is a common practice to enhance the energy efficiency of buildings. In addition to increased thermal performance, the rigid insulation can serve to keep the sheathing board warm and serve as a water-resistive barrier to keep moisture-related problems due to condensation and wind-driven rain. Polyisocyanurate (PIR) rigid boards have a higher thermal resistance in comparison to other commonly used exterior insulation boards. However, because of its perceived lower permeance, its use as exterior insulation is not very common. In this study, the hygrothermal property of PIR boards with different facer types and thicknesses is characterized. The material data obtained through experimental test and extrapolation is used in a long term hygrothermal performance assessment of a wood frame wall with PIR boards as exterior insulation. Results show that PIR with no facer has the smallest accumulated moisture on the sheathing board in comparison to other insulation boards. Walls with a bigger thickness of exterior insulation perform better when no vapor barrier is used. The PIR exterior insulation supports the moisture control strategy well in colder climates in perfect wall scenarios, where there is no air leakage and moisture intrusion. In cases where there is trapped moisture, the sheathing board has a higher moisture content with PIR boards with both aluminum or fiberglass type facers. An innovative facer material development for PIR boards can help efforts targeting improved energy-efficient and durable wall systems.

Impact of combined moisture buffering capacity of a hemp concrete building envelope and interior objects on the hygrothermal performance in a room

2016 ◽  
Vol 9 (6) ◽  
pp. 589-605 ◽  
Author(s):  
Anh Dung Tran Le ◽  
Chadi Maalouf ◽  
Omar Douzane ◽  
Geoffrey Promis ◽  
Ton Hoang Mai ◽  
...  
Keyword(s):  
Buffering Capacity ◽  
Building Envelope ◽  
Hygrothermal Performance ◽  
Concrete Building ◽  
Moisture Buffering

Effect of Zeolite Admixture on Freeze/Thaw Resistance of Concrete Exposed to the Dynamic Climatic Conditions

2014 ◽  
Vol 982 ◽  
pp. 27-31 ◽  
Author(s):  
Václav Kočí ◽  
Miloš Jerman ◽  
Jiří Maděra ◽  
Robert Černý
Keyword(s):  
Service Life ◽  
Computational Simulation ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Point Of View ◽  
Freeze Thaw ◽  
Hygrothermal Behavior ◽  
Hygrothermal Performance ◽  
Concrete Building ◽  
Positive Effect

This paper aims at computational simulation of effect of zeolite admixture on service life of concrete building envelope from point of view of freeze/thaw resistance. Hygrothermal behavior of two types of concrete is studied in this paper: reference concrete without any admixtures and zeolite concrete with 40 % zeolite as cement replacement. The computations are performed using computer simulation tool HEMOT, which processes the input parameters using finite element method. The simulation is assumed under dynamic climatic conditions of Prague. As the results of the computational simulations showed, assuming analyzed amount of zeolite, any positive effect of on freeze/thaw resistance was not found related to unprotected building envelope. However, the results indicated, hygrothermal performance of zeolite concrete can be very considerate to applied external layers and thus extend their service life.

scholarly journals Hygrothermal performance of the building envelope with low environmental impact: case of a hemp concrete envelope

2021 ◽  
Vol 2069 (1) ◽  
pp. 012006
Author(s):  
A Kabore ◽  
W Maref ◽  
C O Plamondon
Keyword(s):  
Environmental Impact ◽  
Air Conditioning ◽  
Energy Performance ◽  
Building Envelope ◽  
Glass Wool ◽  
Mould Growth ◽  
Cement Block ◽  
Hygrothermal Performance ◽  
The City

Abstract This document is a case study of hemp-based materials integrated into the building envelope for African and North American’s applications. The objective is to evaluate the energy performance of hemp concrete for construction in Montreal, Canada, where heating predominates and in Dori, Burkina Faso, where air conditioning predominates. The effect of thermal and hygrothermal comfort of hemp concrete, glass wool, cement block and compressed earth brick walls were simulated to quantify the benefits on overheating during the hottest months for the city of Dori and the risk of mould growth in the walls of the building in winter for the city of Montreal.

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