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Evaluation of phase change materials for a light-weight building in Morocco:Effect of building’s volume,window orientation&infiltration

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energy and Built Environment 2024年第6期5卷 863-877页

作者： Imad Ait Laasri Niima Es-sakali Abdelkader Outzourhit Mohamed Oualid Mghazli Laboratory(LaMEE) Faculty of Sciences SemlaliaCadi Ayyad UniversityMarrakeshMorocco Laboratory(LMAID) Rabat National School of MineRabatMorocco Green energy Park(UM6P/IRESEN) km2 R206BenguerirMorocco ENTPE LTDS UMR CNRS 5513Universitéde LyonCedexVaulx-en-VelinFrance

In this study,we will model a light-weight building made of phase change materials(PCMs)to analyze the impact of the building volume,window orientation,and air infiltration on the PCM *** is done by calculating the energy savings attained by the use of PCM across all of ***’ll use the commercial Rubitherm panels with RT28HC as a phase change material in this ***,the energyPlus simulation engine is chosen to perform the *** impact of building volumes is also evaluated on the PCM activation for light-weight square buildings with different side lengths of 10 m,9 m,8 m,and 7 ***,we looked at how well the PCM performed in terms of energy savings and thermal regulation at different window orientation placements(south,north,west,and east)and various air infiltration rates(0.5,1,1.5,and 3 ACH).This paper’s primary objective is to determine the energy savings for the PCM-enhanced building in Morocco,as well as the effect of building volume,window orientation,and infiltration on the PCM capabilities for stabilizing the indoor room *** results show good indoor temperature stabilization during the summer,for the light-weight square building with a south-facing window and no air *** configuration was able to achieve a total fluctuation reduction of 1303.3℃for the 10 m building in a semi-arid ***,a high energy savings percentage of 69.56%was achieved for the PCM-enhanced building with the south-oriented window and air infiltration of 0.5 air change per hour.

关键词： Building energy efficiency Phase change materials Passive thermal regulation

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Research on Planning and Design of Multi-Story Prefabricated Electric Bicycle Charging Parking Lot in Urban and Rural Areas

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Journal of Architectural Research and Development 2024年第4期8卷 77-91页

作者： Liya Fang Guangzhou Administrative center of Major Public Construction Projects Guangzhou 5100360China

In recent years,disorderly parking and difficult charging of electric bicycles have been challenges in urban *** rapid growth of electric bicycles is in contradiction with the lack of dedicated parking spaces and charging service facilities in towns and *** solve the issue of parking and charging electric bicycles in limited urban and rural spaces,prefabricated building technology is applied to the design of a multi-story electric bicycle parking *** multi-story prefabricated electric bicycle parking lot is utilized in urban and rural planning and design to upgrade parking facilities in old urban areas,land-constrained commercial areas,as well as counties,towns,and rural areas with inadequate municipal ***-story prefabricated electric bicycle parking lots are the application exploration of industrial buildings,and promote the high-quality development planning and construction of towns and counties and *** with the single-story metal charging station,the multi-story assembled electric bicycle parking lot has the characteristics of integrating parking and charging,being more durable and safer in structure,accommodating a large number of vehicles,and improving the space utilization rate.

关键词： Prefabricated building Electric bicycle Parking lot

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A maximum power point tracking strategy applied to building integrated photovoltaics

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Clean energy 2022年第1期6卷 35-42页

作者： Jian Cui Jianjun Fang Department of center for Green energy and Architecture National Institute of Clean-and-Low-Carbon EnergyBeijing 102211P.R.China

To solve the problem of permanent-shadow shading of photovoltaic buildings,a maximum power point tracking(MPPT)strategy to determine the search range by pre-delimiting area is proposed to improve MPPT *** single correspondence between the solar-cell current-voltage(I-V)curve and the illumination conditions was proved by using the single-diode model of photovoltaic cells,thus proving that a change in the illumination conditions corresponds to a unique maximum power point(MPP)search *** to the approximate relationship between MPP voltage,current and open-circuit voltage and short-circuit current of a photovoltaic module,the voltage region where the MPP is located is determined and the global maximum power point is determined using the power operating triangle strategy in this *** carried out in MATLAB proves the correctness and feasibility of the theoretical *** results show that the MPPT strategy proposed in this paper can improve the average efficiency by 1.125%when applied in series as building integrated photovoltaics.

关键词： photovoltaic power generation MPPT efficiency buildings integrated photovoltaic permanent shadow

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L-proline feeding for augmented freeze tolerance of Camponotus japonicus Mayr

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Science Bulletin 2019年第23期64卷 1795-1804页

作者： Mengjia Dou Yazhou Li Ziqiao Sun Lei Lia Wei Rao C4S Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China School of energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Engineering Research center of Sustainable energy and buildings Beijing University of Civil Engineering and ArchitectureBeijing 100044China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Cryo-Biomedical Engineering Beijing 100190China

The successful cryopreservation of organs is a strong and widespread demand around the world but faces great challenges. The mechanisms of cold tolerance of organisms in nature inspirit researchers to find new solutions for these challenges. Especially, the thermal, mechanical, biological and biophysical changes during the regulation of freezing tolerance process should be studied and coordinated to improve the cryopreservation technique and quality of complex organs. Here the cold tolerance of the Japanese carpenter ants, Camponotus japonicus Mayr, was greatly improved by using optimal protocols and feeding on L-proline-augmented diets for 5 days. When cooling to -27.66 ℃, the survival rate of frozen ants increased from 37.50% ± 1.73% to 83.88% ± 3.67%. Profiling of metabolites identified the concentration of whole-body L-proline of ants increased from 1.78 to 4.64 ng g-1 after 5-day feeding. High Lproline level, together with a low rate of osmotically active water and osmotically inactive water facilitated the prevention of cryoinjury. More importantly, gene analysis showed that the expression of ribosome genes was significantly up-regulated and played an important role in manipulating freezing tolerance. To the best of our knowledge, this is the first study to link genetic variation to the enhancement of ants’ cold tolerance by feeding exogenous cryoprotective compound. It is worth noting that the findings provide the theoretical and technical foundation for the cryopreservation of more complex tissues,organs, and living organisms.

关键词： L-proline Cryopreservation Freeze tolerance Metabolomics Gene expression

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Monitoring and evaluation of building ventilation system fans operation using performance curves

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能源与人工环境(英文) 2020年第3期1卷 307-318页

作者： Mahendra Singh Muhyiddine Jradi Hamid Reza Shaker center for energy Informatics University of Southern DenmarkCampusvej 555230Denmark

Ventilation fans are an important component of any mechanically ventilated *** fan performance could significantly affect the whole building performance *** are several issues such as dirty blades,mechanical wear,aging of fans could impact the fan’s *** present work,a novel,indirect and data-driven methodology is introduced to monitor the ventilation fan unit *** proposed method is able to perform continuous monitoring of ventilation fan unit in *** real-time performance of 3 Air handling unit(AHU)fans is examined in an academic *** fan performance is modeled with the help of manufacturer data and compared against the real-time *** data-driven models are developed and *** first model is used to compute expected total fan pressure at a given airflow rate while second is a Support Vector Regression(SVR)model,to predict the fan *** performance monitoring of the ventilation fan unit is determined in terms of expected and actual fan energy *** indicated a significant performance gap in three ventilation fan unit in a case building known as OU44,located in city Odense,*** advantage of this method comprises simplicity,no direct human intervention and scalability to the series of ventilation units.

关键词： buildings Ventilation system Fan unit Performance curve Modeling Fan efficiency energy consumption HVAC Performance testing Support vector regression(SVR) Polynomial regression

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Highly Transparent Fire-resistant Coatings with Intumescent Three-source Integration

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Chinese Journal of Polymer Science 2024年第7期42卷 907-915,I0005页

作者： Xiao-Liang Zeng Xin-Sheng Lan Yan Wang Lin Zhang De-Ming Guo Hai-Bo Zhao State Grid Sichuan Electric Power Research Institute Chengdu610041China The Collaborative Innovation center for Eco-Friendly and Fire-Safety Polymeric Materials(Ministry of Education) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu610064China

Wood,a readily available and sustainable natural resource,has found widespread use in construction and ***,its inherent flammability poses a potential fire *** intumescent fire-retardant coatings effectively mitigate this risk,achieving high transparency in such coatings presents a significant *** our approach,we employed a cross-linked network of phytic acid anion and N-[3-(trimethoxysilyl)propyl]-N,N,N-trimethylammonium cation to create a transparent"three-in-one"intumescent *** collaborative P/N/Si flame-retardant effect markedly improved the intumescent char-forming capability,preventing the wood from rapid *** resulted in a substantial reduction in heat release(13.9%decrease in THR)and an increased limiting oxygen index(LOI)value of 35.5%.Crucially,the high transparency of the coating ensured minimal impact on the wood's appearance,allowing the natural wood grains to remain clearly *** innovative approach provides a straightforward method for developing transparent intumescent flame-retardant coatings suitable for wooden *** potential applications extend to preserving ancient buildings and heritage conservation efforts.

关键词： Fire-resistant coating Flame retardancy Wood Transparency

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Focal mechanics and disaster characteristics of the 2024 M 7.6 Noto Peninsula Earthquake,Japan

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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1378-1387页

作者： Guang-qi CHEN Yan-qiang WU Ming-yao XIA Zhi-yuan LI School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300131China Graduate School of Engineering Kyushu UniversityFukuoka 819-0395Japan The First Monitoring and Application center China Earthquake AdministrationTianjin 300180China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China

On January 1,2024,a devastating M 7.6 earthquake struck the Noto Peninsula,Ishikawa Prefecture,Japan,resulting in significant casualties and property *** information from the first six days after the earthquake,this article analyzes the seismic source characteristics,disaster situation,and emergency response of this *** results show:1)The earthquake rupture was of the thrust type,with aftershock distribution showing a north-east-oriented belt-like feature of 150 km.2)Global Navigation Satellite System(GNSS)and Interferometric synthetic aperture radar(InSAR),observations detected significant westward to north-westward co-seismic displacement near the epicenter,with the maximum horizontal displacement reaching 1.2 m and the vertical uplift displacement reaching 4 m.A two-segment fault inversion model fits the observational data well.3)Near the epicenter,large Peak Ground Velocity(PGV)and Peak Ground Acceleration(PGA)were observed,with the maxima reaching 145 cm/s and 2681 gal,respectively,and the intensity reached the highest level 7 on the Japanese(Japan Meteorological Agency,JMA)intensity standard,which is higher than level 10 of the United States Geological Survey(USGS)Modified Mercalli Intensity(MMI)standard.4)The observation of the very rare multiple strong pulse-like ground motion(PLGM)waveform poses a topic worthy of research in the field of earthquake engineering.5)As of January 7,the earthquake had left 128 deaths and 560 injuries in Ishikawa Prefecture,with 1305 buildings completely or partially destroyed,and had triggered a chain of disasters including tsunamis,fires,slope failures,and road ***,this paper summarizes the emergency rescue,information dissemination,and other disaster response and management measures taken in response to this *** work provides a reference case for carrying out effective responses,and offers lessons for handling similar events in the future.

关键词： Noto Peninsula Earthquake earthquake rupture mechanism earthquake disaster emergency response pulse-like ground motion

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Clustering-based probability distribution model for monthly residential building electricity consumption analysis

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Building Simulation 2021年第1期14卷 149-164页

作者： Jieyan Xu Xuyuan Kang Zheng Chen Da Yan Siyue Guo Yuan Jin Tianyi Hao Rongda Jia State Grid(Beijing)Integrated energy Planning and D&R Institute Co. Ltd.Beijing100052China Building energy Research center School of ArchitectureTsinghua UniversityBeijing100084China Institute of energy Environment and EconomyTsinghua UniversityBeijing100084China

Electricity is now the major form of energy used in residential buildings and has seen a significant increase in usage over the past *** of the main features of electricity use in residential buildings is the diversity of total electricity consumption and use patterns among *** models may not be able to simulate and generate electricity use curves or reflect the variations *** fill this gap,this research simulates electricity use curves in residential buildings with a clustering-based probability distribution *** model extracts feature parameters to represent the electricity use level and patterns and then conducts a two-step cluster analysis to identify the distinctions of both electricity use levels and *** on the clustering results,probability distributions are fitted for all feature parameters within each *** model is then validated with three validation *** electricity consumption in households of the Jiangsu Province,China,was studied to test the performance of the ***,this paper discusses the application of this model under different spatial resolutions and analyzes the temporal-relevant model features.

关键词： cluster analysis probability distribution residential building electricity consumption

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The Pathways toward Carbon Peak and Carbon Neutrality in China's Building Sector

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Chinese Journal of Urban and Environmental Studies 2022年第2期10卷 57-69页

作者： GUO Siyue JIANG Yi HU Shan Institute of energy Environment and Economy Tsinghua University Building energy Research center School of Architecture Tsinghua University

Achieving carbon peaking and carbon neutrality in the building sector is an important component of China’s "dual carbon" *** recent years,the country’s direct carbon emissions in the building sector have hit a plateau while the total emissions still grow ***,the building materials for construction and refrigerants leaked during buildings’ operation also result in greenhouse gas *** achieve the targets set for future low-carbon development,the building sector should feature sufficient demand,decarbonized structure and flexible load." According to the analysis of the emission reduction approaches adopted by different sectors,China’s building sector should make a ceaseless effort to promote building energy conservation,improve electrification,and load flexibility,reform the energy system in rural areas,optimize the heating structure in northern China’s urban areas,as well as reduce the emissions during construction and the non-CO2gas *** the 14th Five-Year period,it is suggested to clarify the total energy consumption and carbon emission targets,adjust the energy structure more vigorously,and draw up more measures to reduce the emissions related to construction and refrigerant leakage.

关键词： Carbon peaking carbon neutrality the building sector

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Climate change induced heat stress impact on workplace productivity in a net zero-carbon timber building towards the end of the century

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Building Simulation 2024年第6期17卷 893-906页

作者： Deepak Amaripadath Mattheos Santamouris Shady Attia School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZUSA Urban Climate Research center Arizona State UniversityTempeAZUSA School of Built Environment University of New South Wales2052SydneyAustralia Sustainable Building Design Lab Department of UEEFaculty of Applied SciencesUniversity of Liege4000LiegeBelgium

Changing climate intensifies heat stress,resulting in a greater risk of workplace productivity decline in timber office buildings with low internal thermal *** impact of climate change induced heat exposure on indoor workplace productivity in timber office buildings has not been extensively ***,further investigation to reduce the work capacity decline towards the end of the century is ***,heat exposure in a net zero-carbon timber building near Brussels,Belgium,was evaluated using a reproducible comparative approach with different internal thermal mass *** analysis indicated that strategies with increased thermal mass were more effective in limiting the effects of heat exposure on workplace *** medium and high thermal mass strategies reduced workplace productivity loss to 0.1%in the current,0.3%and 0.2%in the midfuture,and 4.9%and 3.9%for future *** comparison,baseline with low thermal mass yielded a decline of 2.3%,3.3%,and 8.2%.The variation in maximum and minimum wet-bulb globe temperatures were also lower for medium and high thermal mass strategies than for low thermal mass *** study findings lead to the formulation of design guidelines,identification of research gaps,and recommendations for future work.

关键词： heat exposure office buildings work capacity thermal mass climate change

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