期刊,建筑模拟（英文版） 2024年卷9期_国家学术搜索

期刊信息/Journal information

建筑模拟（英文版）

出版周期：双月刊

国际刊号：1996-3599

建筑模拟（英文版）/Journal Building SimulationCSCD北大核心EISCI

正式出版

收录年代

Energy consumption dynamic prediction for HVAC systems based on feature clustering deconstruction and model training adaptation

Huiheng LiuYanchen LiuHuakun HuangHuijun Wu...

1439-1460页

查看更多>>摘要：The prediction of building energy consumption offers essential technical support for intelligent operation and maintenance of buildings,promoting energy conservation and low-carbon control.This paper focused on the energy consumption of heating,ventilation and air conditioning(HVAC)systems operating under various modes across different seasons.We constructed multi-attribute and high-dimensional clustering vectors that encompass indoor and outdoor environmental parameters,along with historical energy consumption data.To enhance the K-means algorithm,we employed statistical feature extraction and dimensional normalization(SFEDN)to facilitate data clustering and deconstruction.This method,combined with the gated recurrent unit(GRU)prediction model employing adaptive training based on the Particle Swarm Optimization algorithm,was evaluated for robustness and stability through k-fold cross-validation.Within the clustering-based modeling framework,optimal submodels were configured based on the statistical features of historical 24-hour data to achieve dynamic prediction using multiple models.The dynamic prediction models with SFEDN cluster showed a 11.9％reduction in root mean square error(RMSE)compared to static prediction,achieving a coefficient of determination(R2)of 0.890 and a mean absolute percentage error(MAPE)reduction of 19.9％.When compared to dynamic prediction based on single-attribute of HVAC systems energy consumption clustering modeling,RMSE decreased by 12.6％,R2 increased by 4.0％,and MAPE decreased by 26.3％.The dynamic prediction performance demonstrated that the SFEDN clustering method surpasses conventional clustering method,and multi-attribute clustering modeling outperforms single-attribute modeling.

原文链接:

NETL
NSTL
万方数据

Thermal performances and invisible thermal barrier formation mechanism of arc-shaped metal-fin-enhanced thermally activated building envelopes with directional heat charging feature

Yang YangSarula ChenJiqiang ZhangZhenya Zhang...

1461-1489页

查看更多>>摘要：Thermally activated building envelopes(TABEs)are multifunctional component that combines structural and energy properties.Based on re-examining the heat charging processes,an arc-shaped metal-fin-enhanced TABE(Arc-finTABE)with directional heat charging features is proposed to optimize the thermal barrier formation process.A comprehensive parameterized analysis is conducted based on a validated mathematical model to explore the influence of 5 fin-structure design parameters and the static insulation thickness.Results verified that the directional charging strengthening fins can improve transient thermal performances of Arc-finATBE and enlarge horizontal and vertical sizes of the thermal energy accumulation area surrounding the pipeline,while the maximum growth in extra heat loss is less than 3.17％.From the perspective of promoting heat injection into expected areas,the straight main fin configurations with the angle of main fins of 30°,shank length ratio of 0.4 and no leftward mounted fins are preferred in load-reduction mode,while the angle of main fins of 150°,shank length ratio of 0.8 and multiple fin designs,especially with one of the main fins horizontally toward the indoor side,are more favorable in auxiliary-heating mode.Besides,it is recommended to add one arc-shaped branch fin to each main fin to achieve a balance between performance improvement and material usage.Moreover,branch fins with larger arc angles are preferred in auxiliary-heating mode,while smaller arc angles are conducive to injecting heat into the wall along main fins in load-reduction mode and preventing the heat near the inner surface from being extracted.Under the direct influence of the strengthened invisible thermal barrier,Arc-finTABEs can reduce the amount of static insulation layer by 20％-80％while achieving equivalent thermal performances as conventional high-performance walls.

原文链接:

NETL
NSTL
万方数据

Impact of radiative cooling on the energy performance of courtyards in Mediterranean climate

Carlos-Antonio Domínguez-TorresAntonio Domínguez-Delgado

1491-1513页

查看更多>>摘要：Radiative cooling has proven to be a useful tool to address the problems of lack of comfort and excessive energy consumption in situations of high temperatures,overheating and heat waves.Likewise,incorporating courtyards in warm climate zones has been found to be highly beneficial in addressing similar challenges.Hence,there is interest in analyzing the combined effects of both:radiative cooling and courtyards.This paper presents an analysis of the impact of the application of radiative cooling on a courtyard using a comprehensive simulation approach that includes a CFD model for the thermodynamic airflow in the adjacent roofs and inside the courtyard,equations for the transient heat conduction through roofs,walls and courtyard slabs,and a hybrid raytracing-radiosity model for the evaluation of the solar radiation reaching the building surfaces and its reflections,both of specular and diffuse origin,and for the calculation of the thermal radiation exchange,especially with the sky.The results show that in the hot season,the courtyard with radiative cooling always provides lower temperatures than the initial courtyard does,with a temperature range of 18.33 ℃ to 33.78 ℃,compared to a range of 19.32 ℃ to 38.00 ℃ in the initial courtyard,and producing a greater difference with outdoor temperatures that can reach 12 ℃ versus 8 ℃ for the reference case.In addition,it was found that the courtyard with radiative cooling is able to significantly reduce the observed nighttime overheating by providing lower temperatures than the outdoor temperatures in the 50％of the nights studied.It was also found that the thermal loads to achieve indoor thermal comfort in the spaces adjacent to the courtyard were reduced by 63.46％to 69.85％.

原文链接:

NETL
NSTL
万方数据

Simulation analysis for controlling temperature stability of a radiant-board system served for thermodynamic temperature measurement laboratory

Haoxue LiuSiqi LiuXiuming LiZongwei Han...

1515-1529页

查看更多>>摘要：Fundamental metrology is closely tied to scientific advancement and requires well-equipped facilities to achieve low measurement uncertainty in rigorous experiments.Addressing the±0.1 K high-stability temperature control issue of the precision laboratory radiant air conditioning system,this study investigated the influence of different radiant panel area ratios,laying methods,cold source water supply temperature fluctuations,and external environmental disturbances by simulations.The results indicate that:(1)the larger the ratio of radiant panel area,the greater the fluctuation in equipment surface temperature;(2)the surface temperature of the measurement equipment can satisfy±0.1 K control temperature stability requirement when the fluctuations of the surface temperature of radiant panels and glass window are within±0.5 K and±1 K respectively without radiant panels on the ceiling;(3)the surface temperature of the measurement equipment can satisfy±0.1 K control temperature stability requirement when the fluctuations of the surface temperature of radiant panels and glass window are within±0.2 K and±2 K respectively with radiant panels on the ceiling.This study provides a reference for the design and operation control of air conditioning systems in fundamental metrology.

原文链接:

NETL
NSTL
万方数据

A real-time personal PM2.5 exposure monitoring system and its application for college students

Wanning YangBin Zhao

1531-1539页

查看更多>>摘要：There is a growing need in public health to conduct large-scale epidemiological studies to investigate the health effects of fine particulate matter(PM25)exposure levels.In response to this need,we developed a real-time personal PM2.5 exposure monitoring system(PEPS:Personal Exposure PM2.5 System),which is capable of monitoring personal exposure concentration and uploading data in real time.The air quality self-labelling device,specifically customized for the PEPS,can be worn on the body and features functions for real-time data automatic upload,data storage,data export,and localization.This system enables researchers to obtain the big data of personal PM2.5 exposure concentration at low cost,with minimal manpower and technical requirements.It has been utilized to investigate the personal exposure levels of PM2.5 among college students in Beijing,China,providing a substantial volume of valuable data for indoor air quality and related epidemiological study.The maximum difference between the monitored daily average exposure concentration and the outdoor concentration was 265 pg/m3,corresponding to a relative error of 1579.5％.The correlation analysis of 11 factors showed that the correlation between exposure concentration and outdoor concentration was as high as 0.66(p＜0.001),and the correlation between exposure concentration and other certain factors was in the range of[-0.11,-0.03].

原文链接:

NETL
NSTL
万方数据

Study on the discharge coefficient of wind-driven naturally ventilated Chinese solar greenhouses

Jingfu ZhangShumei ZhaoZhiwei LiuYanfeng Li...

1541-1556页

查看更多>>摘要：The Chinese solar greenhouse(CSG)is a prevalent feature in agricultural practices within China.Nevertheless,the regulation of natural ventilation within this architectural structure remains suboptimal.Consequently,the development of a natural ventilation model becomes imperative for the effective management of the greenhouse environment.Of particular significance within these models is the consideration of the discharge coefficient as a pivotal parameter.Conducting a multi-case investigation into the variable-dependent discharge coefficient is crucial for both practical application and model advancement.This research delved into the impact of various factors,including the upper-lower vents area ratio(Aup/Alow),vent-greenhouse area ratio(Alow/Agreenhouse),lower vent position height(h/H),the incident angle of the external wind,and altitude,on the discharge coefficient(Cd)of CSG.A CFD model was developed for a scaled CSG with validation conducted through field experiments and wind tunnel tests.Results indicated a 61.6％reduction in Cd on average corresponding to an 80％decrease in Aup/Alow.Cd levels remained consistent following the attainment of an Aup/Alow ratio of 1.0.Besides,there was an average increase of 52.5％in Cd levels for every 0.09 decline in h/H,attributed to the blocking effect of the cover.Moreover,the ventilation rate and the pressure coefficient difference were utilized to construct a model of Cd pertaining to greenhouse design and ventilation operation,exhibiting a notable accuracy level of R2=0.95.Furthermore,the blocking effect of higher h/H was relieved as the incident angle e decreased under the windward conditions.The increase in Aup/Alow and the decrease in Alow/Agreenhouse were identified as crucial factors contributing to the growth of Cd under leeward conditions.Ultimately,the high-altitude environment led to a rise in Cd levels in contrast to the low-altitude region.The increasing rate of Cd correlated positively with Alow/Agreenhouse and h/H initially,but exhibited a decline once Aiow/Agreenhouse reached 0.036,remaining stable thereafter once h/H reached 0.18.In summary,a comprehensive examination of the discharge coefficient of CSG was undertaken,addressing a significant knowledge deficiency and laying the groundwork for advancements in the natural ventilation model and the intelligent control system for CSG.

原文链接:

NETL
NSTL
万方数据

Exercise and resting periods:Thermal comfort dynamics in gym environments

Ali Berkay AvciGörkem Aybars BalciTahsin Basaran

1557-1578页

查看更多>>摘要：Physical exercise spaces emerged as popular facilities due to recognizing the significance of physical well-being.This study investigates the relationship among physiological responses,human body energy transfer modes,and indoor environmental conditions in influencing thermal comfort perception within indoor physical exercise space.Seven male participants engaged in a 30 min constant-work-rate cycling exercise and a 20 min resting period in a climatic chamber.The physiological and environmental responses were recorded during the experiments,and the body's energy transfer modes were calculated using the collected data.The dataset was prepared using the 2 min averages of the collected data and calculated parameters across the experiment phases,including the features of skin temperature,core temperature,skin relative humidity,heart rate,oxygen consumption,body's heat transfer rates through convection,radiation,evaporation,and respiration,net metabolic heat production rate(metabolic rate minus external work rate),indoor air temperature,indoor relative humidity,air velocity,and radiant temperature.Gradient boosting regressor(GBR)was selected as the analyzing method to estimate predicted mean vote(PMV)and thermal sensation vote(TSV)indices during exercise and resting periods using features determined in the study.Thus,the four GBR models were defined as PMV-Exercise,PMV-Resting,TSV-Exercise,and TSV-Resting.In order to optimize the models'performances,the hyperparameter tuning process was executed using the GridSearchCV method.A permutation feature importance analysis was performed,emphasizing the significance of net metabolic heat production rate(24.2％),radiant temperature(17.0％),and evaporative heat transfer rate(13.1％).According to the results,PMV-Exercise,PMV-Resting,and TSV-Resting GBR models performed better,while TSV-Exercise faced challenges in predicting exercise thermal sensations.Critically,this study addresses the need to understanding the interrelationship among physiological responses,environmental conditions,and human body energy transfer modes during both exercise and resting periods to optimize thermal comfort within indoor exercise spaces.The results of this study contribute to the operation of indoor gym environments to refine their indoor environmental parameters to optimize users'thermal comfort and well-being.The study is limited to a small sample size consisting solely of male participants,which may restrict the generalizability of the findings.Future research could explore personalized thermal comfort control systems and synergies between comfort optimization and energy efficiency in indoor exercise spaces.

原文链接:

NETL
NSTL
万方数据

Integrated framework for space-and energy-efficient retrofitting in multifunctional buildings:A synergy of agent-based modeling and performance-based modeling

Yuchi ShenXinyi HuXiaotong WangMengting Zhang...

1579-1600页

查看更多>>摘要：This research investigates retrofitting strategies for multifunctional spaces within educational buildings,employing agent-based and performance-based modeling to support decision-making.An experimental matrix was developed,reflecting three usage scenarios(reading,exhibition,lecture)across four retrofitting schemes.An agent-based model was developed to delineate intricate human behaviors in space and examined the self-organizing behaviors of 30 agents for each scheme in every scenario,evaluating six metrics on spatial efficiency and visual experience.Calibrated models,derived from real data and processed through DesignBuilder software,evaluated three metrics:energy use,thermal comfort,and visual comfort.The research then incorporated metrics from the agent-based model and performance simulation to develop a method for discussing the decision-making process in retrofit strategies.The findings indicate that the optimal retrofitting solution for multifunctional spaces is heavily influenced by the distribution of usage scenarios.Given the substantial influence of space metrics on selecting the optimal retrofit scheme,the proposed framework effectively facilitates decision-making for building retrofits by providing a holistic evaluation of both spatial and energy criteria.

原文链接:

NETL
NSTL
万方数据

Exploring the effects of mask wearing on outdoor thermal comfort at different walking speeds—A thermal manikin-based experiment

Xiling LuShengkai ZhaoYongchao ZhaiJianlin Liu...

1601-1613页

查看更多>>摘要：Face masks'wearing for a long duration brings thermal discomfort,especially in hot climate cities.The face masks'thermal insulation and its effect on outdoor thermal comfort have been rarely investigated.In this study,five types of face masks and their thermal insulations have been tested by using a thermal manikin in the climate chamber.Experimental results are assessed by using physiological equivalent temperature(PET)and standard effective temperature(SET*)for thermal comfort with masks at three walking speeds both in summer and winter.Slight differences in thermal insulation are observed among the different masks,the values of PET and SET*rise with increasing mask thermal insulation,and they are generally higher in summer than in winter.Moreover,the variation of SET*is more obvious than PET with same masks at different walking speeds.And the differences of SET*with and without masks appear to rise significantly for fast walking.Results further indicate that the individuals'physical discomfort caused by wearing masks cannot simply be assumed as an additional effect of the clothing thermal insulation.The findings enrich the clothing thermal insulation database,explore the differences in thermal indices if the face mask is used,and provide advice on heat mitigation with masks outdoors.

原文链接:

NETL
NSTL
万方数据

Factors,processes,and models of soundmark identification in urban parks

Chutian SunQi MengDa YangMengmeng Li...

1615-1628页

查看更多>>摘要：The concept of a soundmark refers to a distinctive sound source that identifies a particular area based on its environmental acoustic characteristics.This study investigated the factors and processes of soundmark identification in urban parks.After interviewing participants in 14 different urban parks in China,six categories that affect soundmark identification were identified,"sound source""context""sound perception","individual features""response"and"comprehension"First,the core category is context.As for context,in amusement parks,activity parks,and nature parks,respectively,the theme,function,and scene affect the soundmark identification.For sound perception,soundmark identification is affected by the occurrence of birdsongs and the duration of water sounds in nature parks.Soundmark identification is affected by contrast,duration,and audio-visuals in amusement parks and activity parks.Furthermore,a soundmark identification model specifically for urban parks has been established.The model contains two identified processes:responsive soundmarks and comprehensive soundmarks.For responsive soundmark identification processes,sound source,context,sound perception,and response are essential factors.For comprehensive soundmark identification processes,sound source,context,individual features,and comprehension are essential factors.The soundmarks cannot be identified if the response or comprehension is missed during the process.Ultimately,the park's cultural features promote the identification of comprehensive soundmarks.In addition,soundmarks can be effectively transformed by changing the context of urban parks or the characteristics of sound perception.

原文链接:

NETL
NSTL
万方数据