IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-09-25 DOI: 10.1002/bapi.70079

Dip.-Ing. Georg Eßer

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Titelbild: Bauphysik 5/2026 物理学报，第5 - 2026页。

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 DOI: 10.1002/bapi.70086

引用次数: 0

Vorschau: Bauphysik 5/2026 检索日期：2015-05-26。

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 DOI: 10.1002/bapi.70087

引用次数: 0

Luftdichtheit von Klebeverbindungen – eine kritische Betrachtung 空气动力学：一个关键的考虑

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-09-15 DOI: 10.1002/bapi.70078

Philipp Kölsch M.Eng., Dr.-Ing. Sebastian Treml, Dipl.Ing. Rolf Gross

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Aktuell: Bauphysik 5/2026 检索日期：2015-05-26。

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 DOI: 10.1002/bapi.70083

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Sommerlicher Wärmeschutz der Holz-Strohballenbauweise – dynamisch-thermische Simulation und experimentelle Validierung 木材秸秆结构的夏季隔热：动态热模拟与实验验证

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-08-20 DOI: 10.1002/bapi.70075

B. Eng. Felix Peter, Prof. Dr.-Ing. Martin Schäfers, Prof. Dr.-Ing. Meike Deck

{"title":"Sommerlicher Wärmeschutz der Holz-Strohballenbauweise – dynamisch-thermische Simulation und experimentelle Validierung","authors":"B. Eng. Felix Peter, Prof. Dr.-Ing. Martin Schäfers, Prof. Dr.-Ing. Meike Deck","doi":"10.1002/bapi.70075","DOIUrl":"https://doi.org/10.1002/bapi.70075","url":null,"abstract":"Summer heat protection of wood-straw bale construction method – dynamic thermal simulation and experimental validationDue to climate change, which is mainly influenced by greenhouse gases, temperatures worldwide are steadily increasing. Ecological and low-emission buildings with good summer heat protection are therefore essential to meet these challenges. Straw insulation is becoming increasingly relevant in Europe, combining considerable building physics potential with environmentally friendly properties. There has been no sufficient classification of the summer heat protection of the wood-straw bale construction method, which is why it was investigated and compared to conventional construction methods. Dynamic thermal simulations were performed according to German standard DIN 4108-2 Section 8.4, the construction type was determined in accordance with Section 8.3, and experiments were conducted in a double climate chamber. The results from simulation and experiment were compared using values of overheating degree hours and temperature curves, and the positive effect of the straw bale construction method on summer heat protection was quantified in comparison with the timber frame construction method. Overall, for the exemplary room situations considered – within the range of simulation results spanning between timber frame and solid construction method – the straw bale construction method was determined to have up to 77% lower overheating degree hours compared to a conventional timber frame construction, while on average 31% higher overheating degree hours were found compared to solid construction. The straw bale construction method can be evaluated as having a solid summer heat protection of a medium-heavy construction type.","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"48 5","pages":"418-427"},"PeriodicalIF":0.3,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Influence of blind size on heat transfer and natural ventilation in double-skin façades: A CFD study 盲窗尺寸对双层幕墙传热和自然通风影响的CFD研究

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-08-20 DOI: 10.1002/bapi.70077

Maha Fguiri M.Sc., Assoc. Prof. Ali Fguiri, Prof. Mohamed Razak Jeday, Prof. Zouhaier Mehrez

{"title":"Influence of blind size on heat transfer and natural ventilation in double-skin façades: A CFD study","authors":"Maha Fguiri M.Sc., Assoc. Prof. Ali Fguiri, Prof. Mohamed Razak Jeday, Prof. Zouhaier Mehrez","doi":"10.1002/bapi.70077","DOIUrl":"https://doi.org/10.1002/bapi.70077","url":null,"abstract":"The thermal performance of double-skin façades (DSFs) is strongly affected by the design of shading devices integrated within the cavity. While previous studies have mainly focused on blind angle and position, the influence of blind slat size remains insufficiently explored, particularly under hot climate conditions. In this study, a two-dimensional computational fluid dynamics (CFD) model, validated against experimental data, is developed to investigate airflow patterns, temperature distribution, and heat transfer within the DSF cavity. Five blind sizes ranging from 40 mm to 240 mm are analysed. The results show that increasing blind size enhances solar radiation absorption, leading to higher cavity air temperatures, with peak values reaching approximately 315.8 K. However, larger blinds significantly reduce the inner glass temperature and decrease heat transfer towards the indoor environment due to improved shading performance. In addition, the airflow structure is modified, with noticeable changes in velocity distribution and natural ventilation behaviour within the cavity. Overall, the findings highlight that blind size is a key design parameter that can improve the thermal behaviour of DSF systems and reduce heat gains in buildings located in hot climates.","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"48 5","pages":"428-439"},"PeriodicalIF":0.3,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bauphysikalische und strukturanalytische Untersuchung von Bio-Sandsteinen 生物砂岩的物理和结构分析

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-09-27 DOI: 10.1002/bapi.70080

Christopher Diehl, Jonas Bachert M.Sc., apl. Prof. Dr. Svenja Carrigan, Dr.-Ing. Niklas Erdmann, Dr.-Ing. Dorina Strieth, Prof. Dr.-Ing. Kristin de Payrebrune, Dr.-Ing. Kai Nikolaus, Prof. Dr.-Ing. Sergiy Antonyuk

{"title":"Bauphysikalische und strukturanalytische Untersuchung von Bio-Sandsteinen","authors":"Christopher Diehl, Jonas Bachert M.Sc., apl. Prof. Dr. Svenja Carrigan, Dr.-Ing. Niklas Erdmann, Dr.-Ing. Dorina Strieth, Prof. Dr.-Ing. Kristin de Payrebrune, Dr.-Ing. Kai Nikolaus, Prof. Dr.-Ing. Sergiy Antonyuk","doi":"10.1002/bapi.70080","DOIUrl":"https://doi.org/10.1002/bapi.70080","url":null,"abstract":"Building physics and structural analysis of a bio-sandstoneThe production of bio-sandstone using microbial-induced calcium carbonate precipitation (MICP) represents a promising sustainable alternative to, for example, conventional natural sandstone. In MICP, sand grains are bound together by ureolytic bacteria, such as Sporosarcina pasteurii, through the formation of calcium carbonate crystals, following the addition of a urea-containing solution and a calcium source. For the use of biologically produced bio-sandstone in the construction industry, a comprehensive characterisation of its material and structural properties is required. This paper presents the experimental investigations into the thermal conductivity and specific heat capacity of bio-sandstone. The test benches developed and calibrated for this purpose are based on the applicable normative requirements. Furthermore, a geometric structural analysis using computed tomography is presented, which enables a detailed characterisation of the microstructure and the spatial distribution of the precipitating calcium carbonate crystals. The bio-sandstone samples investigated meet the thermal requirements for structural applications.","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"48 5","pages":"407-417"},"PeriodicalIF":0.3,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inhaltsverzeichnis: Bauphysik 5/2026 检索日期：2015-05-26。

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 DOI: 10.1002/bapi.70085

引用次数: 0

Analyse vertikaler CO2-Gradienten der Raumluft in Bildungsstätten mit natürlicher und mechanischer Lüftung 自然通风和机械通风教育机构室内空气的垂直二氧化碳梯度分析

IF 0.3 4区工程技术

Bauphysik Pub Date : 2026-10-12 Epub Date: 2026-08-17 DOI: 10.1002/bapi.70076

Mag. Daniel Plörer, Dr. Sascha Hammes M.Sc., Assoc. Prof. Dr. Julian Huber, Prof. Silvia Öttl PhD, Assoz. Prof. Dr.-Ing. Rainer Pfluger

{"title":"Analyse vertikaler CO2-Gradienten der Raumluft in Bildungsstätten mit natürlicher und mechanischer Lüftung","authors":"Mag. Daniel Plörer, Dr. Sascha Hammes M.Sc., Assoc. Prof. Dr. Julian Huber, Prof. Silvia Öttl PhD, Assoz. Prof. Dr.-Ing. Rainer Pfluger","doi":"10.1002/bapi.70076","DOIUrl":"https://doi.org/10.1002/bapi.70076","url":null,"abstract":"Indoor air vertical CO2 gradients in educational buildings with natural and mechanical ventilationThe indoor air CO2 concentration in educational buildings serves as an indicator of occupancy-related emissions and ventilation efficiency. Current recommendations for sensor placement typically rely on a single measurement height, yet it remains unclear whether vertical concentration differences in occupied spaces affect the representativeness of such positions. This study investigates the robustness of common CO2 measurement heights in naturally and mechanically ventilated classrooms and a lecture hall. Multiple sensors installed at different heights recorded data under real operating conditions, including window operation and ventilation events. Results show no pronounced long-term stratification and only small vertical differences under steady conditions. Short-term deviations occurred mainly during transient events and were more pronounced in naturally ventilated rooms. The findings confirm that common sensor heights provide robust estimates of long-term CO2 trends, while highlighting limitations of single-point measurements.","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"48 5","pages":"384-393"},"PeriodicalIF":0.3,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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