{"title":"Refining climate zoning in North Africa: A 30-Year analysis of heating and cooling degree days for energy planning and adaptation","authors":"Mohamed Elhadi Matallah , Andreas Matzarakis , Aissa Boulkaibet , Atef Ahriz , Dyna Chourouk Zitouni , Fatima Zahra Ben Ratmia , Waqas Ahmed Mahar , Faten Ghanemi , Shady Attia","doi":"10.1016/j.enbuild.2025.115852","DOIUrl":"10.1016/j.enbuild.2025.115852","url":null,"abstract":"<div><div>This research investigates the spatial variability of heating degree days (HDD) and cooling degree days (CDD) to advance climate zoning across North Africa. Using 30 years of high-resolution meteorological data (1989–2019) from 108 weather stations in Egypt, Libya, Tunisia, Algeria, Morocco, and Western Sahara, HDD and CDD values were calculated for six base temperatures (HDD: 12 °C–22 °C; CDD: 18 °C–28 °C) using NASA/POWER data. The findings reveal substantial climatic and topographical influences on thermal energy demands. Northern regions, particularly high-altitude locations like Bordj Bou Arreridj, Algeria, exhibited the highest HDD values, reaching 2932 at 18 °C, while southern desert areas, such as Adrar, Algeria, demonstrated extreme CDD values, peaking at 3169 at 18 °C. GIS-based spatial interpolation methods enhanced visualization, delineating detailed sub-classifications within the Köppen-Geiger framework, increasing spatial resolution from 12<!--> <!-->321 km2 to 3025 km2. For example, Algeria alone expanded from five to 35 sub-classifications. These refined zones reveal critical differences in energy demand, with northern cities requiring up to 10 times more heating energy, while southern cities demand up to eight times more cooling energy compared to coastal zones. The results provide an essential basis for updating regional building codes and optimizing HVAC designs, supporting climate adaptation and energy efficiency strategies tailored to North Africa’s diverse climatic zones. By enhancing spatial resolution and refining classifications, this research transforms energy planning and thermal regulations in the region.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"342 ","pages":"Article 115852"},"PeriodicalIF":6.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067207","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}
Yuexi Zhu , Yun Su , Xin Ge , Miao Tian , Jianlin Liu , Jun Li
{"title":"Advancing thermal-moisture comfort and environmental adaptability of running apparel in winter","authors":"Yuexi Zhu , Yun Su , Xin Ge , Miao Tian , Jianlin Liu , Jun Li","doi":"10.1016/j.enbuild.2025.115862","DOIUrl":"10.1016/j.enbuild.2025.115862","url":null,"abstract":"<div><div>Outdoor winter running presents challenges of hypothermia and overheating, necessitating the clothing with thermoregulation. This study evaluated the thermal-moisture comfort of four winter running apparel ensembles using a thermal manikin and introduced the Clothing Thermal Sensation Index (CTSI) for assessing environmental adaptability (EA). Results showed increased thermal insulation with greater clothing coverage under static conditions. The thermal regulation level (TRL) improved by 37.31 %-40.09 % with an outer layer, while pant types had minimal impact on thermal regulation. Under dynamic conditions, total thermal insulation decreased by 76.07 %. Notably, the TRL of ensembles T3 and T4 increased slightly by 3.55 %-4.48 %, indicating reduced outer-layer effectiveness during movement. Besides, the T1 achieved a high moisture regulation level (MRL) of 84.11 %, outperforming the T2 by 11.4 %-25.07 % due to quick-dry pants, while the shell jacket in the T3 and T4 significantly reduced the MRL. Additionally, the EA of all ensembles was insufficient under static conditions, with the CTSI<sub>max</sub> in the overcooling zone. In dynamic conditions, the ensembles T1, T2, and T4 showed similar CTSI<sub>neutral</sub> values in −14 to −6 °C, while the T3 exhibited superior EA in −20 to −10 °C with CTSI<sub>neutral</sub> of 20 % higher. This study provides insights for designing winter running apparel and introduces CTSI as a tool for EA assessment.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115862"},"PeriodicalIF":6.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935626","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}
{"title":"Modular green walls: A sustainable architectural solution for energy efficiency in oceanic climates","authors":"Salah-Eddine Ouldboukhitine , Amer Bakkour , Seif Khiati , Rafik Belarbi","doi":"10.1016/j.enbuild.2025.115850","DOIUrl":"10.1016/j.enbuild.2025.115850","url":null,"abstract":"<div><div>Recently, green walls have increasingly been incorporated into building designs. They present a sustainable solution for both new constructions and retrofitting of existing buildings by reducing cooling energy requirements and enhancing overall thermal performance. However, there is limited information on the impact of living wall systems on building environments and their thermal performance in oceanic climates. This study fills this gap by assessing the thermal performance of modular living walls in La Rochelle, France, characterized by an oceanic climate. A prefabricated modular wall was installed on a house-like rectangular block, while a similar block without plant cover was used as a reference. External surface temperatures were measured to assess the effectiveness of the green wall in providing thermal insulation and its potential as a passive design strategy. The results revealed that the green wall significantly reduced surface temperatures by up to 15 °C compared to the reference wall during peak hours. Additionally, a numerical analysis was performed on a three-story building to compare its energy demands with and without green walls. The results indicate that incorporating green walls on the east and west façades notably enhances indoor thermal conditions, achieving a reduction in cooling load of approximately 64.38 %.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"342 ","pages":"Article 115850"},"PeriodicalIF":6.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067211","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}
Simon Pommerencke Melgaard , Rasmus Lund Jensen , Pedro Miguel Ferreira , Kamilla Heimar Andersen , Nuno Dionisio , Vinicius Vielmo Cogo , Per Kvols Heiselberg
{"title":"Fault detection in AHU: A walkthrough for implementation in a Danish educational building","authors":"Simon Pommerencke Melgaard , Rasmus Lund Jensen , Pedro Miguel Ferreira , Kamilla Heimar Andersen , Nuno Dionisio , Vinicius Vielmo Cogo , Per Kvols Heiselberg","doi":"10.1016/j.enbuild.2025.115844","DOIUrl":"10.1016/j.enbuild.2025.115844","url":null,"abstract":"<div><div>The implementation of fault detection in research articles is relatively sparse, yet it holds significant potential to contribute to the decarbonization of our building stock. This study proposes a Fault Detection (FD) methodology that can be split into three stages. 1) FD algorithm development, testing, and validation on known datasets. 2) platform creation, data collection and curation, and method implementation. 3) FD algorithm testing on an operational system running under normal conditions with no artificially induced faults. The results showed that for step 1, using suitable evaluation metrics for realistic datasets is highly important, as otherwise wrong conclusions can be drawn. It was further found that the proposed FD methodology, as intended, led to choosing an algorithm that did not cause many false alarms, as the emphasis was on avoiding these, but also that changing the weighting of the included terms could shift the focus to prioritize other issues.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"342 ","pages":"Article 115844"},"PeriodicalIF":6.6,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070660","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}
{"title":"Assessing performance regret of residential energy-flexibility measures under uncertainty: An ex-ante analysis of techno-economic implications","authors":"C. Verhaeghe , A. Audenaert , S. Verbeke","doi":"10.1016/j.enbuild.2025.115857","DOIUrl":"10.1016/j.enbuild.2025.115857","url":null,"abstract":"<div><div>The increase of renewable energy in the built environment, together with the intermittent nature of these sources, cause energy mismatch problems between on-site energy generation and demand. This increased interest in Energy-Flexibility (EF) measures in residential buildings. This study provides an in-depth analysis for evaluating the performance regret of investment opportunities in residential EF-measures. It includes local electricity storage, production and smart automation- under a very extended range of dynamic and uncertain boundary conditions. A component-based design space exploration method is introduced, enabling robust assessment of EF and Life Cycle Cost (LCC) performance through dynamic ex-ante LCC analysis and energy simulations. This approach effectively addresses the limitations of traditional methodologies that overlook dynamic and uncertain boundary conditions. It allows for the consideration of a complete and relevant range of Social, Technological, Economic, Environmental, and Political (STEEP) uncertainties impacting investment decisions. The methodology is tested on a typical Belgian semi-detached dwelling. Results show that combined variations in STEEP-uncertainties over time are key external factors influencing EF cost-effectiveness, with performance regret ranging from 13.6 % to 80.9 %. Application to three occupant profiles (a family of four, a teleworking couple, and a retired couple) in this study reveals minor impact on performance regret.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"342 ","pages":"Article 115857"},"PeriodicalIF":6.6,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067212","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}
Harshalatha, Shantharam Patil, Pradeep G. Kini, Bysani Sathwik
{"title":"Daylighting analysis for selection of optimal hospital building form in warm humid climate","authors":"Harshalatha, Shantharam Patil, Pradeep G. Kini, Bysani Sathwik","doi":"10.1016/j.enbuild.2025.115858","DOIUrl":"10.1016/j.enbuild.2025.115858","url":null,"abstract":"<div><div>Architectural design is crucial for enhancing the energy performance as well as achieving thermal comfort in a hospital building, requiring a focus on climate as a key design criterion. Daylighting plays a vital role in hospital design, influencing both energy performance and comfort. The research investigates the impact of courtyard building form variants on daylighting and aims to identify the most suitable building forms ensuring optimal daylighting performance while adhering to reference hospital building envelope details located in the warm humid climate of India. This research introduces a combination of simulation and statistically rigorous, data-driven framework to optimize building forms based on daylight metrics. By combining metrics like illuminance, DF, and UDI with ANOVA, it brings a novel methodological approach to architectural research, enhancing the precision and reliability of daylight performance evaluations. The importance of the study in advancing theory and practice in sustainable design is emphasized by its potential to expose novel concepts in similar context. The findings provide valuable insights into develop efficient space layout that balance energy performance and user comfort. This analysis serves as a critical step in the design process, ensuring that chosen courtyard building forms meet functional requirements while prioritizing daylighting, energy efficiency, occupant comfort, well-being, and environmental sustainability.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115858"},"PeriodicalIF":6.6,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935622","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}
Ben Jiang , Jiaming Wang , Yu Li , Peng Wang , Yacine Rezgui , Chengyu Zhang , Menglin Ding , Liuyang Shangguan , Tianyi Zhao
{"title":"Dynamic optimization of cooling temperature setpoints in multiple thermal zones of office buildings in connection with D3QN","authors":"Ben Jiang , Jiaming Wang , Yu Li , Peng Wang , Yacine Rezgui , Chengyu Zhang , Menglin Ding , Liuyang Shangguan , Tianyi Zhao","doi":"10.1016/j.enbuild.2025.115851","DOIUrl":"10.1016/j.enbuild.2025.115851","url":null,"abstract":"<div><div>The heating, ventilation and air conditioning (HVAC) system optimization process needs to focus on both the comfort of the indoor environment and the energy consumption. In large office buildings, there are differently oriented thermal zones, connected thermal zones and multiple air handling unit systems. It becomes particularly difficult to develop control strategies that take into account the associated environmental comfort, increase overall comfort and optimizing system energy use at the same time. This study builds standard floors with multiple thermal zones in the EnergyPlus environment based on real buildings. We use a dueling double deep Q network (D3QN) strategy for determining indoor cooling temperature setpoints for multiple thermal zones in real time. Multiple optimization strategies with different combinations of action selection and reward calculation methods were designed on the target building, and the best strategy was selected in connection with multiple comfort evaluation metrics. The test results show that the screened strategy optimizes the comfort distribution of the relevant thermal zones at the same moment and the overall comfort of the indoor environment. And within the range of optional actions, the combination of actions selected by the strategy can trade-off comfort and system energy consumption.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115851"},"PeriodicalIF":6.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935624","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}
Xinyu Gao , Zemin Liu , Jiayi Gao , Yunwei Zhang , Xiaohu Yang , Ya-Ling He
{"title":"Melting performance of rotational heat storage device for buildings: Design on pore parameters of metal foam","authors":"Xinyu Gao , Zemin Liu , Jiayi Gao , Yunwei Zhang , Xiaohu Yang , Ya-Ling He","doi":"10.1016/j.enbuild.2025.115839","DOIUrl":"10.1016/j.enbuild.2025.115839","url":null,"abstract":"<div><div>Thermal energy storage (TES) represents a promising technology for augmenting solar energy utilization by storing surplus heat for subsequent use, thereby enhancing overall efficiency. A principal challenge in TES systems lies in improving the heat transfer rate to ensure effective energy release during peak demand periods. Significant enhancements in melting efficiency can be achieved through the optimization of pore characteristics and rotational conditions. This study presents a numerical model of a porous structure-based rotating TES unit designed to evaluate the heat storage performance of a metal foam embedded phase change material under both static and rotating conditions. The analysis encompasses parameters such as charging time, heat storage capacity, progression of the melting front, temperature distribution, and velocity distribution, allowing for an assessment of how porosity, pore density, and rotation collectively affect the phase change process. The findings indicate that TES units with lower porosity demonstrate higher heat storage rates under both static and rotating conditions. In particular, the complete melting time of a rotating TES unit with 0.90 porosity is reduced by 88.4 % compared to a unit with 0.99 porosity. Moreover, rotation significantly influences high-porosity structure (0.99), resulting in a 28.4 % reduction in complete melting time. Additionally, high pore density metal foams, when combined with the forced convection effect brought by rotation, further optimize heat storage performance; however, the effect of pore density is comparatively less significant than that of porosity, which is attributed to the fact that compared with the combined influence of porosity on heat conduction and convection, the effect of pore density is reflected in the less influential natural convection. Ultimately, both metal foam and rotational motion enhance the charging efficiency and promote a more uniform melting process.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115839"},"PeriodicalIF":6.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935650","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}
{"title":"Performance evaluation and optimization research of a direct condensation aluminum heating panel integrated with the air source heat pump system","authors":"Suola Shao , Wenjian Wei , Wenjuan Li , Chengcheng Xu","doi":"10.1016/j.enbuild.2025.115841","DOIUrl":"10.1016/j.enbuild.2025.115841","url":null,"abstract":"<div><div>The radiant heating system attracts widespread attention for its outstanding thermal comfort. To promote and optimize this distributed heating system, this study proposed a direct condensation aluminum heating panel (DCAHP) integrated with the air source heat pump (ASHP) system and presented a reliable method for evaluating and optimizing the DCAHP performance. A heat transfer and flow model of the DCAHP was established, and its accuracy was validated through experiments. The deviation between the thermal indicators obtained from numerical simulations and experimental results is within 10 %. Combining economic indicators with the model, the thermo-economic performance can be comprehensively evaluated. Simulation and experimental results indicate that the point where the outlet refrigerant completes condensation has the optimum thermo-economic indicator (<em>C</em><sub>pro</sub>). The length of the copper tube correlates highest with the thermal performance improvement. Finally, a heuristic approach, adopting the gradient descent and particle swarm optimization algorithms, was proposed to optimize the geometric configuration of the DCAHP. The results indicate that for the optimized DCAHP version, the heating capacity is enhanced from 2049.1 W to 2058.4 W, while the initial capital cost is reduced by 8.7 %. Additionally, the refrigerant pressure drop within DCAHP has experienced a 10 % reduction, decreasing from 64.5 kPa to 56.6 kPa. These findings emphasize the potential of DCAHP systems to improve energy efficiency and thermal comfort for winter heating. The proposed model and heuristic optimization methods provide valuable insights for optimizing radiant heating system, contributing to the development of sustainable and cost-effective heating solutions.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115841"},"PeriodicalIF":6.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935625","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}
Kristian Stenerud Skeie , Lillian Sve Rokseth , Carine Lausselet , Arild Gustavsen
{"title":"Characterizing and structuring open datasets for assessment of residential building energy use on the neighborhood and urban scale","authors":"Kristian Stenerud Skeie , Lillian Sve Rokseth , Carine Lausselet , Arild Gustavsen","doi":"10.1016/j.enbuild.2025.115842","DOIUrl":"10.1016/j.enbuild.2025.115842","url":null,"abstract":"<div><div>This study investigates the potential of utilizing and integrating open datasets to assess and visualize energy use in the residential building stock by employing models aligned with national calculation methods, statistics and aggregated data from smart metering platforms. A case study of a Norwegian municipality is employed to illustrate these concepts. The study also examines the possibilities and limitations of using open data to reconstruct building geometry and derive relevant information to generate a new enriched dataset consistent with statistics. Enabling the use of open data and interoperable modeling frameworks is crucial for developing tools that cater to various stakeholders and evolving use cases. The findings demonstrate that the implemented residential building energy model, validated against multiple years of hourly aggregated electricity consumption, performs well on daily and monthly timescales, consistently meeting validation thresholds specified for CV(RMSE) and NMBE. The model’s performance on an hourly basis, critical for assessing strategies to reduce peak electricity loads during the coldest hours, could be improved with more advanced approaches. Additionally, if authorities regularly release up-to-date building footprints, these can be effectively combined with other open datasets to create more accurate inputs for archetypes or georeferenced building simulations, but future releases should be versioned to ensure their applicability. Georeferencing enables the visualization of results in thematic maps, illustrating the impact of future developments at the neighborhood scale, while also facilitating comparisons between building-specific outcomes and area-wide averages or archetypes, potentially empowering individual building owners with actionable insights.</div></div>","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"341 ","pages":"Article 115842"},"PeriodicalIF":6.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934621","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}