Subjects -> ESTATE, HOUSING AND URBAN PLANNING (Total: 304 journals)
    - CLEANING AND DYEING (1 journals)
    - ESTATE, HOUSING AND URBAN PLANNING (237 journals)
    - FIRE PREVENTION (13 journals)
    - HEATING, PLUMBING AND REFRIGERATION (6 journals)
    - HOME ECONOMICS (9 journals)
    - INTERIOR DESIGN AND DECORATION (21 journals)
    - REAL ESTATE (17 journals)

HEATING, PLUMBING AND REFRIGERATION (6 journals)

Showing 1 - 7 of 7 Journals sorted alphabetically
Eating Behaviors     Hybrid Journal   (Followers: 6)
Eating Disorders: The Journal of Treatment & Prevention     Hybrid Journal   (Followers: 16)
Facilities     Hybrid Journal   (Followers: 4)
International Journal of Refrigeration     Full-text available via subscription   (Followers: 3)
International Journal of Ventilation     Full-text available via subscription  
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Facilities Management     Hybrid Journal   (Followers: 3)
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Journal of Building Physics
Journal Prestige (SJR): 0.786
Citation Impact (citeScore): 2
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1744-2591 - ISSN (Online) 1744-2583
Published by Sage Publications Homepage  [1174 journals]
  • Hygrothermal performance of highly insulated external walls subjected to
           indoor air exfiltration

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      Authors: Klaus Viljanen, Jari Puttonen, Xiaoshu Lü
      Abstract: Journal of Building Physics, Ahead of Print.
      The study comprises three laboratory tests in which typical Finnish highly insulated (HI) walls were exposed to concentrated leakages of indoor air under steady outdoor temperatures of 1–5°C. Airflows with a relative humidity of 50% and at rates of 1–3 L/min were directed close to the wooden frames inside the walls. The thermal resistance ratios between the exterior sheathing(s) and the whole wall (Γ) were 20%–22% and 1%–10% for the HI and baseline (BL) walls. The HI walls that presented Γ values of at least 20% were observed to be resistant to air exfiltration, and their durability was not affected by the addition of a gypsum sheathing outside the wooden frame or a more permeable vapor retarder. This is related to the negative linear correlation that exists between the moisture accumulation rate in wood-based material and the dew point depression (DPD) value. The developed approach, called the DPD method, shows that a significant degree of moisture accumulation does not occur even for DPD values of as low as −2°C if the exterior sheathing is vapor permeable. The airflow does not penetrate into the rigid mineral wool sheathing, which helps to avoid interstitial condensation. Regardless of thermal transmittance, the HI and BL walls with maximum Γ values of 1% were exposed to a high relative humidity and even interstitial condensation because the DPD values were often below −2°C. For these walls, the mold index analysis and visual observations confirmed the local risk for mold growth on the opposite side of the leakage point. In practice, long-term mold growth may be limited if the seasonal periods during which the outdoor temperature is 1–5°C last for a maximum of about 1 month every year.
      Citation: Journal of Building Physics
      PubDate: 2022-08-10T09:40:56Z
      DOI: 10.1177/17442591221109956
       
  • Didactic device for teaching the importance of the time-dependent model
           for heat transfer calculations in constructive systems of buildings

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      Authors: Guillermo Ramírez-Zúñiga, Guillermo Barrios, Guadalupe Huelsz Lesbros, Vanessa Sattele
      Abstract: Journal of Building Physics, Ahead of Print.
      There is a worldwide effort aimed at reducing energy consumption in buildings. Part of this effort includes bioclimatic design in the curricula for architects and engineers. The selection of constructive systems for the building envelope according to the climate is of significant importance for bioclimatic design. This has to be done by calculating the heat transfer through the constructive system using the time-dependent model. However, because the time-dependent model is easier to use it is also more commonly employed. To contribute to the teaching of the importance of using the time-dependent model, a didactic device and a practice were proposed. This paper presents the physical problem and the heat transfer models; the didactic device’s design process, its components and operating method; as well as the methodology for the practice. The didactic device and practice were created by the interaction of experts and students who gave their opinions and suggestions during different workshops.
      Citation: Journal of Building Physics
      PubDate: 2022-05-16T05:44:36Z
      DOI: 10.1177/17442591221093057
       
  • Analysis of condensation and ventilation phenomena for double skin
           façade units

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      Authors: Francesco Squadroni, Giuseppe De Michele, Enrico Sergio Mazzucchelli, Ingrid Demanega, Sara Mangialardo, Stefano Avesani
      Abstract: Journal of Building Physics, Ahead of Print.
      This paper presents a study of the thermo-hygrometric behaviour of a Double Skin Façade (DSF) unit. The study aims (i) at comparing currently used calculation procedures according to European and American standards (UNI EN ISO 10077, UNI EN ISO 12631:2018, ISO 15099:2003, ANSI/NFRC 100 for the thermal performance and ISO 13788:2012 (2012) for the condensation risk), and (ii) at assessing the 2D hygrothermal performance of a double skin module through a Finite Element Method (FEM)-based model. According to the current standards, a detailed characterization of thermal and fluid dynamic phenomena in closed and ventilated cavities is neglected and a simplified approach is proposed, which tends to overestimate the overall U-value of the curtain wall (UCW) due to an incremental thermal resistance that depends on the thickness of the air gap layer and the level of ventilation. The potential risk of this simplification is that the DSF estimated design performance, whilst complying with regulatory requirements, present inconsistencies respect to the real behaviour, impacting energy, comfort, material degradation, etc. Accurate assessments could be done already during design through detailed FEM multi-physic analyses. Nevertheless, those require a specific knowledge, are cost and time-consuming. As a first step, this study focuses on comparing the normed calculation approach for the design, against a detailed FEM-based multi-physics methodology. Specifically, this couples CFD, hygrothermal and Ray Tracing physics in a tool for the calculation of thermal transmittance, g-value and relative humidity of a DSF with a customizable geometry. As a second step, given a real DSF unit that showed unforeseen phenomena of surface condensation inside the cavity during several hours in spring and autumn, the multi-physic tool has been used to evaluate the condensation risk with the current and modified DSF design, under static and time-dependent boundary conditions.
      Citation: Journal of Building Physics
      PubDate: 2022-04-12T09:25:53Z
      DOI: 10.1177/17442591221084351
       
  • On the potential of clustering approaches for hygrothermal material
           properties based on three degradation risks in solid masonry constructions
           

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      Authors: Bruno Vanderschelden, Klaas Calle, Nathan Van Den Bossche
      First page: 882
      Abstract: Journal of Building Physics, Ahead of Print.
      Historic masonry has a rich and colorful history making it a treasured part in our society. To preserve and protect this heritage, adequate moisture control, retrofit, and restauration strategies are required. However, due to the large range of material properties inherent to historic brickwork, a single uniform renovation strategy appears impossible. To describe similarity in brickwork, the existing clustering approach developed by Zhao was evaluated. The idea is that different types of bricks with similar properties can be represented by a single representative brick for that cluster, for example, when conducting hygrothermal simulations. It could help improve existing retrofit practice by reducing characterization processes and minimizing time-consuming laboratory measuring tests. However, in this paper the approach presented by Zhao is questioned since the clustering is solely based on an equal impact of the material properties and the response behavior and associated degradation risks are neglected. The aim of this paper was twofold. Firstly, similarity in brickwork obtained by clustering according to Zhao was evaluated by means of hygrothermal simulations to see whether bricks in the same cluster show similar degradation risks. Zhao’s clustering provides homogenous clusters regarding physical material properties, but significant variation was found in degradation risks for different bricks within the same cluster. Secondly, a methodology is presented to translate similarities in degradation profiles toward similarities in material properties. Sensitivity analyses were used to study the response behavior based on three degradations risks: mold growth, wood rot, and frost damage. Finally, an overall clustering scheme was generated for brickwork, based on classification trees for different degradation phenomena.
      Citation: Journal of Building Physics
      PubDate: 2022-04-21T06:05:44Z
      DOI: 10.1177/17442591221085734
       
  • Evaluation of moisture diffusion characteristics and the effect of
           moisture treatment on flexural properties of expanded perlite-based
           building material

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      Authors: Md Arifuzzaman, Ho Sung Kim
      First page: 941
      Abstract: Journal of Building Physics, Ahead of Print.
      The expanded perlite-based building material for drywall application consisting of sodium silicate solution as a binder was manufactured by varying the degree of compaction and sodium silicate content to investigate moisture diffusion behavior and the effect of moisture treatment on flexural properties of the composites. Moisture treatment was conducted on specimens in a climatic chamber at a temperature of 37°C and a relative humidity of 90% until saturation. Results show that moisture absorption decreased with increasing compaction ratio for a constant sodium silicate content in binder and increased with increasing sodium silicate content in binder for a constant compaction ratio. A range of volume fractions of solid sodium silicate in the foam is identified, in which the fully Fickian diffusion gradually transformed to non-Fickian diffusion as sodium silicate content in foam increased. The concentration-dependent diffusion method was found to be suitable to explain this behavior. The moisture diffusion below this transition range showed an entirely Fickian diffusion and changed to concentration-dependent diffusion above the range. As a result of moisture treatment, the flexural strength of medium density foams was decreased but the lowest- and highest-density foams were not affected while the flexural modulus was increased only for the highest density foam and no significant effects were seen in other cases. The bending failure mechanism of the composite was not affected by the moisture treatment.
      Citation: Journal of Building Physics
      PubDate: 2022-02-08T05:24:12Z
      DOI: 10.1177/17442591211073972
       
  • Hygrothermal performance of a brick wall with interior insulation in cold
           climate: Vapour open versus vapour tight approach

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      Authors: Paul Klõšeiko, Targo Kalamees
      First page: 849
      Abstract: Journal of Building Physics, Ahead of Print.
      Interior insulation of historic buildings is well-studied in Central Europe; however, their conclusions might not be directly applicable to colder climates. Heat, air and moisture (HAM) modelling can be a valuable tool for studying those solutions in different conditions. Recently, incorporating the capillary condensation redistribution (CCR) test into the material characterization process has shown to cause dramatic improvement in correlating hygrothermal modelling results to measurements in certain situations. It is also noteworthy, that the HAM modelling errors made using material data from conventional characterization process can be severely non-conservative. In this article a parametric study of a 51 cm thick mass masonry wall is undertaken to determine the effect of the improved material properties on the reliability of a vapour open ‘capillary active’ autoclaved aerated concrete (AAC) and calcium silicate (CaSi) interior insulation solutions and to compare them to a vapour tight insulation system. A 49-year real weather dataset from Estonia is used. The results show that compared to conventionally characterized material properties the CCR-optimized material data causes more critical conditions directly behind the interior insulation, while having a similar performance in the exterior part of the masonry. The differences occur close to the performance limits and highlight the importance of using the CCR test in material characterization process. The vapour tight and vapour open systems showed a very similar impact on the freeze-thaw cycles and on the maximum ice saturation of the exterior part of the masonry. The vapour open solutions perform better than the vapour tight PIR in terms of frost damage and possible mould growth behind the insulation – even though the advantage has been reduced when using the CCR-optimized material data. Regardless of the insulation solution, a case-specific approach is still required to avoid damaging the original wall and/or the added insulation system.
      Citation: Journal of Building Physics
      PubDate: 2021-11-12T09:29:18Z
      DOI: 10.1177/17442591211056067
       
  • Vapour resistance of wind barrier tape: Laboratory measurements and
           hygrothermal performance implications

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      Authors: Ida-Helene Johnsen, Erlend Andenæs, Lars Gullbrekken, Tore Kvande
      First page: 923
      Abstract: Journal of Building Physics, Ahead of Print.
      In the building industry, the interest into adhesive tape to achieve a more tight and robust building envelope has increased rapidly in recent years. With an increasing demand for energy efficiency in buildings, national building authorities are strengthening building requirements to mitigate and adapt to future climate impacts. This paper studies the water vapour permeability of adhesive tape for building purposes. A water vapour permeable wind barrier is essential to enable drying of the external side of the building envelope. Laboratory measurements have been conducted to evaluate how the drying conditions of the wind barrier layer are affected by the use of wind barrier tape. The results show that all the wind barrier tapes tested can be defined as significantly more vapour tight than the wind barrier itself. The wind barrier used as reference was found to have an sd-value of 0.03 m while tape ranged between 1.1 and 9.24 m. To ensure adequate drying and minimize the risk of moisture damages, the wind barrier layer should be vapour open. In an investigated construction project, the amount of tape constitutes 13% of the area of the building’s wind barrier. Further simulations need to be conducted to accurately determine the drying conditions and the following consequences.
      Citation: Journal of Building Physics
      PubDate: 2021-11-25T09:29:47Z
      DOI: 10.1177/17442591211057188
       
  • WITHDRAWN – Administrative Duplicate Publication: Editorial volume
           41 no 1 (September)

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      Abstract: Journal of Building Physics, Ahead of Print.

      Citation: Journal of Building Physics
      PubDate: 2019-12-16T10:45:41Z
      DOI: 10.1177/1744259117711197
       
  • REMOVAL NOTICE: Field research study for investigating wetting and drying
           characteristics in wood-framing walls subjected to cold climate

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      Abstract: Journal of Building Physics, Ahead of Print.

      Citation: Journal of Building Physics
      PubDate: 2019-12-03T07:05:24Z
      DOI: 10.1177/1744259119891184
       
 
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