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Exploring cognitive functions variability at ambient temperatures from 20 °C to 48 °C: An fNIRS study
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-05 DOI: 10.1016/j.enbuild.2025.115424
Jing Geng , Yin Tang , Song Wang , Yan Zhang , Meng Lan , Kaixin Shen , Wenguo Weng
{"title":"Exploring cognitive functions variability at ambient temperatures from 20 °C to 48 °C: An fNIRS study","authors":"Jing Geng ,&nbsp;Yin Tang ,&nbsp;Song Wang ,&nbsp;Yan Zhang ,&nbsp;Meng Lan ,&nbsp;Kaixin Shen ,&nbsp;Wenguo Weng","doi":"10.1016/j.enbuild.2025.115424","DOIUrl":"10.1016/j.enbuild.2025.115424","url":null,"abstract":"<div><div>Exposure to elevated temperatures is known to impair task performance and diminish work efficiency. Functional near-infrared spectroscopy (fNIRS), celebrated for its non-invasive and portable characteristics, is extensively utilized in brain function research. This study explores the potential of fNIRS signals in assessing cognitive function across a range of ambient temperatures. Twenty-four right-handed university students were subjected to eight temperature conditions (20, 23, 26, 30, 35, 40, 45, and 48 °C) in a climate chamber. Changes in oxygenated hemoglobin (O<sub>2</sub>Hb) concentration within the prefrontal cortex (PFC) were measured during both resting and task states using a 22-channel fNIRS system. The data revealed significant variations in brain activity within the lateral prefrontal cortex (VLPFC) and dorsolateral prefrontal cortex (DLPFC) across different temperatures during the resting state. A quadratic relationship (R^2 &gt; 0.7) between ambient temperature and resting state O<sub>2</sub>Hb concentrations was established through correlation analysis. Under cognitive tasks, peak activations for the 2-back, trail-making, and addition tests were noted at 20 °C, while the Stroop test reached its peak activation at 26 °C. Further, correlations between task performance and fNIRS-derived cognitive metrics were analyzed. Specifically, the Stroop test displayed pronounced variations in the hemodynamic response function (HRF) relative to ambient temperature, with changes in O<sub>2</sub>Hb concentration consistent with variations in task performance as temperatures increased. These findings highlight the reliability of fNIRS as a tool for assessing cognitive dynamics under thermal strain.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115424"},"PeriodicalIF":6.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Fully exploiting solar energy with building envelops: Experimental study on an adjustable photovoltaic green facade
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-05 DOI: 10.1016/j.enbuild.2025.115431
Chunying Li , Jixing Xie , Ruixue Liu , Junyi Tan , Xiaojiao Zhu , Na Li , Haida Tang
{"title":"Fully exploiting solar energy with building envelops: Experimental study on an adjustable photovoltaic green facade","authors":"Chunying Li ,&nbsp;Jixing Xie ,&nbsp;Ruixue Liu ,&nbsp;Junyi Tan ,&nbsp;Xiaojiao Zhu ,&nbsp;Na Li ,&nbsp;Haida Tang","doi":"10.1016/j.enbuild.2025.115431","DOIUrl":"10.1016/j.enbuild.2025.115431","url":null,"abstract":"<div><div>An innovative adjustable photovoltaic green facade (APVGF) was proposed that combines an adjustable photovoltaic (PV) blind system with a green facade (GF), offering high flexibility, significant energy output, excellent architectural aesthetics, and considerable building energy-saving potential. Experimental evaluations with identical test boxes showcased the system’s multifaceted benefits, including a notable decrease in the average daytime temperature of window glass by 4.2 ℃ and 5.2 ℃ for the GF and APVGF, respectively, with peak reductions reaching 9.7 ℃ and 13.7 ℃. The interior air temperature was reduced by an average of 6.5 °C and 7.7 °C, with maximum reductions of 15.3 °C and 18.6 °C. Additionally, the GF and the APVGF reduced the daytime average light intensity inside the test box by 6837 and 7706 lx, reducing the glare risk. High temperatures and self-shading significantly reduced the power generation efficiency of the PV modules in the auto-adjusting and 30° fixed modes. However, the higher total equivalent irradiance (<em>G<sub>E</sub></em>) received in auto-adjusting angle mode resulted in daily power generation being approximately 17.2 % and 22.5 % higher than that in the 30° and 90° fixed angle modes. The APVGF system’s key innovation is its dual-purpose design: it adjusts the angle of the PV blinds based on the sun’s position and environmental needs, boosting PV efficiency, and it enhances the building’s ecological and aesthetic value with a green facade. This system marks a breakthrough in green building tech and offers a new approach to urban sustainability.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115431"},"PeriodicalIF":6.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Life cycle carbon and cost assessments of the retrofit to Passivhaus EnerPHit standard of suburban residential buildings in Hunan, China
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-04 DOI: 10.1016/j.enbuild.2025.115417
Chenfei Liu , Haniyeh Mohammadpourkarbasi , Steve Sharples
{"title":"Life cycle carbon and cost assessments of the retrofit to Passivhaus EnerPHit standard of suburban residential buildings in Hunan, China","authors":"Chenfei Liu ,&nbsp;Haniyeh Mohammadpourkarbasi ,&nbsp;Steve Sharples","doi":"10.1016/j.enbuild.2025.115417","DOIUrl":"10.1016/j.enbuild.2025.115417","url":null,"abstract":"<div><div>The substantial number of energy-inefficient residential buildings in China presents a significant barrier to the Chinese government’s ambitious goal of achieving carbon neutrality by 2060. The Passivhaus standard provides clear and structured guidance on achieving low energy consumption during building operations. However, the extent to which the corresponding EnerPHit retrofit standard contributes to carbon neutrality, especially over an entire building’s lifespan, remains unclear. High initial costs and uncertainties in payback periods often obstruct the implementation of deep retrofits. To address these gaps, this study conducted life cycle carbon and cost assessments on a suburban residential building in Hunan, China, evaluating five EnerPHit standard retrofit scenarios requiring different levels of retrofit inputs. These results were compared with the life cycle performance of the pre-retrofit scenario. Dynamic building energy simulations, accounting for changing climate conditions over the next 30 years, provided a predicted evaluation of operational impact The findings suggest that EnerPHit-level retrofits can achieve significant total carbon savings of 80 %–83 % compared to the pre-retrofit case over the examined lifespan. However, the cost benefits were less prominent, with savings ranging between 7 % and 15 %. The initial impacts on carbon and cost were notably different: total embodied carbon accounted for only 8 %–14 % of the lifecycle, while initial costs comprised 71 %–75 %. Optimisation analysis is necessary to maximise the benefits of EnerPHit-level retrofits. The best retrofit scenario in this study achieved a combined efficiency of ¥87 financial savings per tonne of carbon saved per square metre of floor area, whereas the worst scenario only achieved 46 % of this efficiency.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115417"},"PeriodicalIF":6.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Scaling laws of energy metabolism in modern cities: Insights from biological metabolism
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-04 DOI: 10.1016/j.enbuild.2025.115421
Zhaoping Wu , Yandong Tan , Kai Fang , Xu Wu , Ying Ge , Jie Chang
{"title":"Scaling laws of energy metabolism in modern cities: Insights from biological metabolism","authors":"Zhaoping Wu ,&nbsp;Yandong Tan ,&nbsp;Kai Fang ,&nbsp;Xu Wu ,&nbsp;Ying Ge ,&nbsp;Jie Chang","doi":"10.1016/j.enbuild.2025.115421","DOIUrl":"10.1016/j.enbuild.2025.115421","url":null,"abstract":"<div><div>Urban energy metabolism plays a pivotal role in determining the energy efficiency of cities, and is intrinsically linked to economic and environmental sustainability, as well as human well-being. However, the general principles underlying urban energy metabolism are poorly explored, which are needed for devising effective energy management solutions for future urbanization challenges. Drawing inspiration from the scaling laws observed in biological metabolism, an empirical model is introduced in this study to reveal the relationship between urban energy metabolism and urban mass. By analyzing 60 cities in China, we first developed a bottom-up framework for identifying city components and measured urban mass, then explored the scaling laws of urban energy metabolism response to urban mass. Results show that: (1) urban energy metabolism scales linearly (β ∼ 1) with population size, but its response to urban mass shifts from sublinear to linear scaling as economic level raised; (2) superlinear scaling behavior in GDP output (β &gt; 1) promote energy efficiency of larger cities; (3) high-economic city group shows a linear scaling in energy metabolism with urban mass, aligning with that of unicellular eukaryotes; (4) economic level is the most significant factor affecting energy efficiency of cities. (5) urban energy metabolism’s strong link to building mass implies a priority for energy-efficient buildings. Our analysis demonstrates that modern cities share the common scaling principle in energy metabolism with unicellular eukaryotes and provides a methodology for city planning and management by learning from more evolved eukaryotic cells, which could define better strategies to enhance the sustainability and vitality of global cities.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115421"},"PeriodicalIF":6.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Field questionnaire survey on thermal comfort of medical personnel in operating rooms for hospitals in Nanjing
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-04 DOI: 10.1016/j.enbuild.2025.115423
Ang Wang , Shao-Cong Wang , Fan Peng , Jie Xia , Hui Ren , Mei-Lan Tan , Bin Zhou
{"title":"Field questionnaire survey on thermal comfort of medical personnel in operating rooms for hospitals in Nanjing","authors":"Ang Wang ,&nbsp;Shao-Cong Wang ,&nbsp;Fan Peng ,&nbsp;Jie Xia ,&nbsp;Hui Ren ,&nbsp;Mei-Lan Tan ,&nbsp;Bin Zhou","doi":"10.1016/j.enbuild.2025.115423","DOIUrl":"10.1016/j.enbuild.2025.115423","url":null,"abstract":"<div><div>The heating, ventilation and air conditioning (HVAC) system in the operating room is designed to provide clean air and reduce surgical site infection rates. Although the HVAC system provides a good indoor thermal environment for the surgical team and patients, the different thermal preferences of the surgical team pose challenges to meet the general comfort requirements. Therefore, we conducted a field survey on the thermal environment and thermal comfort of the operating room in Nanjing, and collected 254 questionnaires. The survey results show that the thermal comfort of personnel is related to the class of operating room and work responsibilities. It is shown that only 18.2 % of the medical staff said that the thermal environment in the operating room had no effect on the operation process. 22.7 % of the staff said that the thermal environment in the operating room affected the operation and needed to be improved. The thermal comfort level of the circulating nurse was better. The surgeon felt hot, while the anesthesiologist felt cold. The difference of medical staff’s responsibilities leads to the difference of thermal comfort. As the cleanliness level of the operating room decreases, the thermal comfort level of the medical staff increases. This study provides a basis for improving the thermal environment of the surgical team in the operating room.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115423"},"PeriodicalIF":6.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Impact of public policies on the dynamics of energy retrofit and fuel poverty in mainland France
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-04 DOI: 10.1016/j.enbuild.2025.115348
Corinne Chaton
{"title":"Impact of public policies on the dynamics of energy retrofit and fuel poverty in mainland France","authors":"Corinne Chaton","doi":"10.1016/j.enbuild.2025.115348","DOIUrl":"10.1016/j.enbuild.2025.115348","url":null,"abstract":"<div><div>Most EU countries have introduced financial and fiscal instruments to accelerate investment in the energy renovation of buildings, which is needed to achieve carbon neutrality by 2050. However, in the absence of reliable data, it is difficult for some countries, such as France, to assess the impact of these instruments on both the dynamics of energy renovation and fuel poverty. To compensate for this lack of data, a tool has been developed. It is presented in this study. It takes into account the three predominant factors in the notion of fuel poverty, namely household resources, the price of energy and the quality of housing. It includes two multiple linear models for estimating: 1. disposable income and 2. energy expenditure. A life-cycle investment cost model is used to calculate the probability of an owner-occupier carrying out thermal renovation work. For tenant households, renovation is based on an annual renovation target. The model is tested in the French case with real values for variations in energy prices and disposable income. It has been calibrated to reproduce the distribution of dwellings according to their energy performance in 2017. The effects of different renovation subsidies on the dynamics of renovation and on fuel poverty are studied. Among the results of the simulations, it should be emphasised that financing the renovation of the least energy-efficient homes alone is not the most effective solution for reducing fuel poverty.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115348"},"PeriodicalIF":6.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Local thermal sensation model with local skin temperature and local skin heat flux in a personalized heating microenvironment
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-04 DOI: 10.1016/j.enbuild.2025.115429
Guoqing Yu, Runnan Lu, Xing Lv, Shuang Feng
{"title":"Local thermal sensation model with local skin temperature and local skin heat flux in a personalized heating microenvironment","authors":"Guoqing Yu,&nbsp;Runnan Lu,&nbsp;Xing Lv,&nbsp;Shuang Feng","doi":"10.1016/j.enbuild.2025.115429","DOIUrl":"10.1016/j.enbuild.2025.115429","url":null,"abstract":"<div><div>Limited research has explored the relationship between skin heat flux and thermal sensation. While prior models by Hui Zhang and Yuming Sun addressed thermal comfort, they were unsuitable for personalized heating microenvironments. This study examines changes in local thermal sensation, skin temperature, and heat flux in such settings. Experiments measured local skin temperature, heat flux, and thermal sensation using questionnaire surveys. By analyzing relationships among these variables, separate models were developed for three lower body parts—thigh, calf, and sole—accounting for gender differences. The mathematical models established for local thermal sensation and skin temperature were expressed as segmented exponential functions, while heat flux and thermal sensation exhibited a negative exponential correlation. The proposed models demonstrated enhanced alignment with experimental results, improving accuracy by 85.37 % in personalized heating microenvironments. Additionally, gender differences significantly influenced the models, particularly for the sole. These findings advance the accuracy of thermal comfort predictions and provide a robust framework for analyzing thermal environments.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115429"},"PeriodicalIF":6.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Optimizing the thermostat setting points of residential and insulated buildings in the direction of economic efficiency and thermal comfort through advanced multi-purpose techniques
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-03 DOI: 10.1016/j.enbuild.2025.115428
Peng He , Ali B.M. Ali , Zahraa Abed Hussein , Narinderjit Singh Sawaran Singh , Pardeep Singh Bains , Shaxnoza Saydaxmetova , Mohammadreza Baghoolizadeh , Soheil Salahshour , As’ad Alizadeh
{"title":"Optimizing the thermostat setting points of residential and insulated buildings in the direction of economic efficiency and thermal comfort through advanced multi-purpose techniques","authors":"Peng He ,&nbsp;Ali B.M. Ali ,&nbsp;Zahraa Abed Hussein ,&nbsp;Narinderjit Singh Sawaran Singh ,&nbsp;Pardeep Singh Bains ,&nbsp;Shaxnoza Saydaxmetova ,&nbsp;Mohammadreza Baghoolizadeh ,&nbsp;Soheil Salahshour ,&nbsp;As’ad Alizadeh","doi":"10.1016/j.enbuild.2025.115428","DOIUrl":"10.1016/j.enbuild.2025.115428","url":null,"abstract":"<div><div>The present research work develops a new approach for the optimization of thermostat setting and insulation designs in residential buildings located in various Iranian climates, including hot-humid, arid, temperate, and cool regions. The objective functions are set to minimize the construction cost, consumed electricity cost, and PPD to improve thermal comfort. Advanced computational techniques are integrated in a structured way to achieve the mentioned objectives. Numerical modeling is done through the simulation of building energy performance and thermal comfort using EnergyPlus. The exact mathematical relations between design variables and objective functions, which were heating setpoint and cooling setpoint, insulation thickness, and thermal conductivity, were identified using Multi-Polynomial Regression. MPR model has been validated respect to a wide set of statistical measures that included but were not limited to R², RMSE, and MAE for its high predictive accuracy. Then, multi-objective optimization is performed through NSGA-II, a well-known multi-objective optimization algorithm, which provides a Pareto front of optimal solutions balancing energy efficiency, cost, and comfort. Shannon's entropy method assigns weights to the Pareto-optimal solutions, whereas the Technique for Order of Preference by Similarity to the Ideal Solution (TOPSIS) selects the most suitable configurations for each city. Calculations show a great reduction in energy consumption to up to 82.66% at Bandar Abbas, with very important improvements in comfort, where the PPD is reduced between 31.1% to 56.3%. The predictive capacity of the MPR model was confirmed by this study, from the value of R², close to 1. The cost-effectiveness of the proposed solutions is underlined by minimizing construction and energy costs while preserving occupant comfort. This innovative approach adapts optimization strategies to regional climatic characteristics, providing practical solutions for sustainable and cost-effective building designs. The integration of advanced machine learning and genetic algorithms offers a scalable framework for future energy-efficient construction practices worldwide, contributing to reduced carbon footprints and enhanced occupant well-being. By addressing the limitations of previous studies and introducing a clear, structured methodology, this research provides valuable insights and practical tools for optimizing residential building performance in diverse climates.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"332 ","pages":"Article 115428"},"PeriodicalIF":6.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Outdoor thermal comfort and the cooling effect in different layouts of shaded spaces: A study of Guangzhou, China
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-02 DOI: 10.1016/j.enbuild.2025.115403
Tangjun Feng , Ran Peng
{"title":"Outdoor thermal comfort and the cooling effect in different layouts of shaded spaces: A study of Guangzhou, China","authors":"Tangjun Feng ,&nbsp;Ran Peng","doi":"10.1016/j.enbuild.2025.115403","DOIUrl":"10.1016/j.enbuild.2025.115403","url":null,"abstract":"<div><div>This study aims to identify outdoor thermal comfort and the cooling effect among different layouts of shaded spaces for the humid subtropical (Cfa) climatic zones in Guangzhou, China. Six shaded spaces with one unshaded space were investigated by using meteorological measurements and questionnaire surveys during summer and winter. Outdoor thermal benchmarks were determined with Physiological Equivalent Temperature (PET) and compared with other climatic zones. The thermal comfort calendar for shaded spaces was proposed and the thermal adaptation behaviors were summarized. Results showed that: 1) Deciduous tree array provided the best cooling effect of 4.7 ℃ (T<sub>a</sub>) and 11.3 ℃ (PET) in summer, and 4.6 ℃ (T<sub>a</sub>) and 8.0 ℃ (PET) in winter (warm period). 2) the single row of evergreen trees was deemed as the most comfortable space during summer and winter, despite receiving low thermal sensation votes for “neutral” in summer. 3) Air temperature and global temperature were the main factors influencing outdoor thermal comfort. 4) The neutral PET, the PET range, the PET acceptability range and the preferred PET in Guangzhou were 18.4 ℃, 11.9–24.8 ℃, 8.3–22 ℃ and 18.2 ℃, respectively. 5) All shaded spaces were “moderate heat stress” after 12:00 or warmer in summer, and lake pavilion experienced “moderate heat stress” from 10:00 to 14:00 on sunny days in the winter warm period. These results could help urban designers and planners gain insights into the outdoor thermal comfort and adaptive behaviors of Guangzhou people, evaluate the varying cooling effect in different layouts of shaded spaces, and select suitable thermal benchmarks and appropriate configurations to create thermally comfortable outdoor shaded spaces in humid subtropical urban parks.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"331 ","pages":"Article 115403"},"PeriodicalIF":6.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143219822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Multi-agent deep reinforcement learning for Smart building energy management with chance constraints
IF 6.6 2区 工程技术
Energy and Buildings Pub Date : 2025-02-02 DOI: 10.1016/j.enbuild.2025.115408
Jingchuan Deng , Xinsheng Wang , Fangang Meng
{"title":"Multi-agent deep reinforcement learning for Smart building energy management with chance constraints","authors":"Jingchuan Deng ,&nbsp;Xinsheng Wang ,&nbsp;Fangang Meng","doi":"10.1016/j.enbuild.2025.115408","DOIUrl":"10.1016/j.enbuild.2025.115408","url":null,"abstract":"<div><div>With the development of building power supply technology, traditional building is gradually replaced by smart building (SB) with advanced energy management system, enabling effective management of building energy resources. However, the uncertainty of photovoltaic (PV) output brings new challenges to building energy management. Therefore, this paper proposes a multi-agent deep reinforcement learning-based energy management strategy for SB, in which SB is decomposed into multiple energy-local area networks (E-LANs) with controllable devices, each E-LAN is then regarded as an agent. According to the multi-agent deep deterministic policy gradient algorithm, each agent learns the optimal energy management strategy for E-LAN through interactions with the environment, thereby achieving overall energy management for SB. To fully account for the uncertainty of PV outputs, first, random PV output time sequences are used during training process of algorithm. Then, the equivalent PV output is obtained according to the converted deterministic constraints from the joint chance constraint of the original problem, and is used for solving the day-ahead energy management. Simulation results show that compared to stochastic programming-based method and deep deterministic policy gradient algorithm-based method, the proposed energy management method reduces the total cost by up to 11.5% within a scheduling period and by up to 7.6% in 3 continuous scheduling period. Additionally, energy interaction between E-LANs is improved significantly to promote local energy consumption.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"331 ","pages":"Article 115408"},"PeriodicalIF":6.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143219824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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