Energy and Built Environment最新文献

{"title":"Optimizing kitchen ventilation with an integrated stove air supply-exhaust system for reducing PM2.5 intake fraction and enhancing energy efficiency","authors":"Yu Liu,&nbsp;Chong Li,&nbsp;Hongqiang Ma,&nbsp;Xinmei Luo","doi":"10.1016/j.enbenv.2024.10.003","DOIUrl":"10.1016/j.enbenv.2024.10.003","url":null,"abstract":"<div><div>Ensuring good ventilation is crucial for reducing the pollution caused by cooking activities in the indoor environment. Among them, fume exhaust devices as a vital component of kitchen ventilation, and their performance is particularly critical. Merely increasing the air volume of exhaust devices to remove fumes not only leads to the higher energy consumption of exhaust fans, but also has limited practical effect on reducing pollution. For improving the ventilation condition and reducing the energy consumption of supply and exhaust fan, a new ventilation system for kitchen with integrated stove air supply-exhaust (ISASE) was developed in this study. Firstly, the orthogonal experiment was utilized for arranging different combination schemes of five influencing factors, including the emission rate, exhaust flow, upper air supply angle, upper and lower air supply velocities. Then, the effect of ISASE in reducing the intake fraction of PM_2.5 under each scheme was studied by using the computational fluid dynamics method. The energy consumption of this system under different ventilation schemes was investigated with on-site testing. Finally, performance-gaining rate was proposed by introducing intake fraction reduction rate and energy consumption growth rate to quantitatively evaluate the performance advantage of ISASE. Polynomial fitting was also used to explore the energy-saving effect of ISASE at high emission rate. The results showed that at low, medium, and high emission rates, the intake fraction of PM_2.5 was reduced by 65.0 %–84.2 %. However, the energy consumption of ISASE merely increased by 7.4 %–16.8 % compared with traditional integrated stove without air supply conditions. Its maximum performance-gaining rate reached 0.49–0.66. The energy-saving rate of ISASE was 46.7 % compared with traditional integrated stove without air supply when the same intake fraction was achieved at high emission rate. The practical schemes of ISASE at different emission rates were given in this study, which optimized the working performance of integrated stove and provided a useful reference for its innovative design.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 227-238"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of pollution removal mechanisms in steep-asymmetric city-type environments using wind deflectors","authors":"Madhavan Vasudevan ,&nbsp;Francesco Pilla ,&nbsp;Aonghus McNabola","doi":"10.1016/j.enbenv.2024.07.007","DOIUrl":"10.1016/j.enbenv.2024.07.007","url":null,"abstract":"<div><div>Traffic emissions directly impact indoor air quality in near-road buildings. Adjustable wind deflectors on building roofs were previously shown to be effective in mitigating air pollution for ideal city-type environments. This was based on the hypothesis that wind deflectors promoted higher pollutant removal by reducing the dependence on turbulent fluctuations. However, the question of whether such a deflector system would work in a more complex city-type environment such as an asymmetric street canyon remains unanswered. In addition, the fundamental impact a deflector could impart on flow dynamics within street canyons in the context of pollution removal through differing mechanisms also requires further research. The current study seeks to answer both questions by introducing adjustable wind deflectors for step-up and step-down asymmetric canyons with two traffic flow directions. For the step-down canyon, the deflectors promoted CO reduction in building facades by 73.55% and 34.79% from leeward and windward walls under a Cross Road Pollution (CRP) source. A 16.57% reduction was achieved on side walls under a Side Road Pollution (SRP) source. However, apart from the 13.87% CO reduction across windward walls under the CRP source, the wind deflectors predominantly resulted in detrimental results for step-up canyons. The ratio of pollution exchange rate achieved by mean flow-induced fluxes and total pollution exchange rate (<span><math><mi>θ</mi></math></span>), Sherwood number is the ratio of convective and diffusive mass transfer (Sh) and average canyon concentration (<span><math><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></math></span>) were used as indices to investigate pollution removal mechanisms. Although both <span><math><mrow><mi>S</mi><mi>h</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> and <span><math><mrow><mi>θ</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> relationships exhibited good inverse correlations when the deflector was positioned at different locations, the <span><math><mrow><mi>S</mi><mi>h</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> showed superior performance in distinguishing the scenarios where a deflector was involved and when not. This implies that the introduction of wind deflectors impacted more in effecting convective fluxes than fluctuations for pollution removal.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 128-149"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigation of urban heat island effect in various urban forms","authors":"Tingzhen Ming ,&nbsp;Yachen Liu ,&nbsp;Tianhao Shi ,&nbsp;Chong Peng ,&nbsp;Yanhua Chen ,&nbsp;Renaud de Richter ,&nbsp;Yueping Fang","doi":"10.1016/j.enbenv.2024.11.001","DOIUrl":"10.1016/j.enbenv.2024.11.001","url":null,"abstract":"<div><div>The urban heat island effect is a widespread phenomenon in major cities worldwide, exerting significant impacts on urban environments, human health, and energy consumption, thus attracting extensive research interest. The manifestation of the urban heat island effect varies across different urban forms. This study employs a three-dimensional porous media model to comprehensively analyze the urban heat island effect and the influence of wind speed on three typical urban layouts: single-center, multi-center, and grid.</div><div>The results indicate: (1) The more dispersed the city center, the weaker the urban heat island intensity, with differences in peak heat island intensity of up to 0.3 K among different urban forms. (2) Under favorable environmental wind conditions, higher wind speeds lead to weaker heat island intensity. At v = 5 m/s, the grid-based heat island intensity decreases by 0.57 K. (3) With increasing building density, the urban heat island effect intensifies in all three types of cities, with the single-center city exhibiting the largest increase in heat island intensity, up to 23.5 %</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 54-65"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct and inverse simulations of hydrodynamic and thermal characteristics in a room with random boundary conditions by feedforward neural network modelling","authors":"Mohammad Foruzan Nia,&nbsp;Eric Hu,&nbsp;Mergen H. Ghayesh","doi":"10.1016/j.enbenv.2024.08.005","DOIUrl":"10.1016/j.enbenv.2024.08.005","url":null,"abstract":"<div><div>Artificial Intelligence (AI) or Neural Network (NN) approaches are starting to be used in built environment areas. This study demonstrates that feedforward neural network (FNN) modelling is capable of simulating the hydrodynamic and thermal characteristics of a room with a radiant heating and cooling system. The FNN model was trained and tested to simulate air velocity and temperature profiles based on boundary conditions as direct simulation and to restore boundary conditions as inverse simulation, using a scaled and normalised database generated by a Computational Fluid Dynamics (CFD) model. In the CFD model, the non-dimensional form of the governing equations, including the radiative transfer equation (RTE) and vorticity equation, were solved using the discrete ordinate method (DOM) and finite difference method (FDM) respectively. The impacts of training database size, hidden layers, and the number of neurons in each layer on the accuracy of the FNN results in the direct and inverse simulations were evaluated in terms of the average root mean square error (RMSE) over the testing data. In the direct simulation, using a smaller CFD database with more hidden layers and neurons achieved comparable accuracy to an FNN trained with a larger CFD database and a less complex FNN. Furthermore, in the inverse simulation, where the FNN model was trained to use a subdomain of temperature profiles to simulate or restore the boundary conditions, the effect of the size of the subdomain on the accuracy in terms of RMSE was studied. It demonstrated that the FNN approach could conduct inverse simulations that are typically beyond the capability of conventional CFD modelling approaches. The results show that the boundary conditions could be accurately restored using subdomains of the temperature profile, covering approximately 60% of the main domain.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 163-176"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the contribution rate of photovoltaic power in indoor ice arenas across different climatic zones: A case study in China","authors":"Yue Yang,&nbsp;Junjie Li,&nbsp;Wen Zhang,&nbsp;Fang Zheng","doi":"10.1016/j.enbenv.2024.09.001","DOIUrl":"10.1016/j.enbenv.2024.09.001","url":null,"abstract":"<div><div>With the increasing construction of ice arena facilities, addressing their energy consumption issues has become crucial, emphasizing the need for renewable energy utilization. This study aims to determine the contribution rate of photovoltaic (PV) power generation in indoor ice arenas across different climate zones in China and proposes corresponding PV application strategies. By modeling the vertical zoning above the ice arena, energy consumption in indoor ice arenas across six typical cities was simulated, calculating annual and monthly renewable energy contribution rates and proposing utilization strategies. The research reveals a growing proportion of cooling energy consumption due to climate warming, exceeding half of the total energy even in cold cities. Differences in energy consumption and renewable energy contribution rates among cities highlight the impact of local climate conditions. Favorable climates and abundant solar resources in some cities enable more energy-efficient ice arena construction, while high energy consumption and limited solar resources pose challenges in others. The study identifies seasonal variations in renewable energy contribution rates, emphasizing the need to optimize power generation seasonally. In colder cities, summer power generation is essential, while in hotter climates, winter power generation is more advantageous. This study provides insights for designing energy-efficient and sustainable ice arenas.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 28-40"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of initial temperature and relative humidity on VHP penetration during HEPA in-situ fumigation disinfection","authors":"Ye Yuan,&nbsp;Jiajing Sui,&nbsp;Xiangfei Kong","doi":"10.1016/j.enbenv.2024.08.003","DOIUrl":"10.1016/j.enbenv.2024.08.003","url":null,"abstract":"<div><div>The high efficiency particulate air filter (HEPA) in exhaust system of high-level biosafety laboratory must be disinfected to kill harmful microorganisms before being replaced or tested. In-situ fumigation by vaporized hydrogen peroxide (VHP) is the most commonly used disinfection method for HEPA unit. The disinfection effect of HEPA unit is affected by the internal environment, but the influence of initial internal environment on VHP penetration during the fumigation process is still rarely studied. In this paper, a numerical model was established based on a physical HEPA box unit and field measurement. According to the simulated VHP flow field during in-situ fumigation process, the influence of initial internal temperature and relative humidity on the VHP penetration effect in HEPA was discussed with the indicators of penetration rate and velocity distribution. The results showed that the VHP concentration in the upstream section of HEPA was relatively uniform, while the maximum and minimum concentrations in the downstream section showed great difference and located at the top and bottom, respectively. The distributions of VHP penetration and upstream velocity were both vertically uneven. The VHP penetration rates in the middle of HEPA remained around 73 %. The initial temperature of 32 °C or 36 °C, or the initial relative humidity of 18 % were the suitable initial internal environment for HEPA in-situ fumigation, which could keep the VHP penetration rates of the upper and lower parts of HEPA at about 76 % and 61 %, respectively. In the suitable initial environment, the penetration and disinfection effect could be promoted by appropriately extending the rapid injection duration. This study provides a reference for optimizing the initial environment setting of HEPA in-situ fumigation.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 1-13"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conceptualizing sustainable occupant behaviour in offices from an interdisciplinary point of view: A systematic review","authors":"Han Li,&nbsp;Rianne Appel-Meulenbroek,&nbsp;Theo A. Arentze,&nbsp;Pieter-Jan Hoes","doi":"10.1016/j.enbenv.2024.08.004","DOIUrl":"10.1016/j.enbenv.2024.08.004","url":null,"abstract":"<div><div>Occupant Behaviour (OB) has been identified as one of the most influential factors that impact workplace space usage. In addition, it proven to be one of the key reasons for discrepancies between predicted and measured energy consumption of office buildings. The current interdisciplinary understanding of OB is hardly conducive to an exhaustive conclusion, with many premises and veiled explanations made during the research, design, and management process. This paper aims to review the existing literature that focuses on energy-related workplace OB from Social and Behavioural science and from Engineering science for two reasons. Firstly, to identify the theory, connotation, and application of occupant behaviour in both fields. Secondly, to identify the type of behaviour, triggers of behaviour, and theoretical support for defining the term “Sustainable Occupant Behaviour in Offices (SOBO)”. This review used the PRISMA approach with the addition of snowball papers. The demonstrated results cover three main findings: 1. The four types of OB relevant in workplaces are occupancy, adaptive behaviour, non-adaptive behaviour, and personal adaptive behaviour. 2. Building, environmental, contextual, and personal factors were the four types of influential factors for SOBO. 3. Current theoretical frameworks for SOBO are mainly based on the Theory of planned behaviour (TPB), the norm-activation model (NAM) and/or the motivation, opportunity and ability (MOA) model. Findings are important for knowledge exchange and synergy processes between both disciplines in future studies.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 66-81"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on dynamic heat transfer characteristics and fin geometric parameters in latent heat storage system with vertical tubes and longitudinal fins","authors":"Shengtao Ou,&nbsp;Ping Wang,&nbsp;Huan Su,&nbsp;Xiao Chen,&nbsp;Ye Yang","doi":"10.1016/j.enbenv.2024.08.007","DOIUrl":"10.1016/j.enbenv.2024.08.007","url":null,"abstract":"<div><div>Latent heat storage plays an important role in the utilization of solar energy. However, the low thermal conductivity of phase change materials (PCM) significantly reduces the heat transfer efficiency of latent heat storage systems. To enhance its storage/release efficiency, optimizing the fin geometry is essential. This paper establishes a validated three-dimensional numerical model that considers PCM natural convection to study the effects of fin height and number on the heat transfer process. The fin volume of all models is kept constant, and the fin height is determined by the annular space. The impact of fin heights (0.3<em>ΔR</em>, 0.5<em>ΔR</em>, 0.7<em>ΔR</em>, 0.9<em>ΔR</em>) and numbers (4, 8, 10, 16) on heat transfer efficiency was investigated by analyzing the PCM temperature distribution on the shell section, the liquid fraction within the shell over time, and the average heat transfer rate and heat flux. The results show that increasing the fin height from 0.3<em>ΔR</em> to 0.9<em>ΔR</em> reduces the heat storage and release completion times by 61.16 % and 45.43 %, respectively. Similarly, increasing the number of fins from 4 to 16 reduces the heat storage and release completion times by 33.35 % and 31.13 %, respectively. The study concludes that increasing both the fin number and height dilutes the heat flux between the fin and PCM during both the heat storage and release processes, with the fin number having a more significant effect on reducing heat flux than fin height. Therefore, when the fin volume remains constant, increasing fin height is more conducive to improving the heat transfer performance of the PCM. These findings will provide a foundation for the application of finned tube energy storage systems in building energy conservation and other fields.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 177-190"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sorption kinetics of vermiculite-K2CO3 in thermochemical energy storage: Model evaluation and mechanism exploration","authors":"Jianquan Lin ,&nbsp;Qian Zhao ,&nbsp;Yimin Xiao ,&nbsp;Haotian Huang","doi":"10.1016/j.enbenv.2024.07.005","DOIUrl":"10.1016/j.enbenv.2024.07.005","url":null,"abstract":"<div><div>Thermal energy storage technology is crucial for building heating and domestic hot water supply, playing an essential role in optimizing energy utilization. Hydrated salts have emerged as prominent materials for thermochemical energy storage (TCES), with their sorption kinetics directly impacting thermal energy conversion efficiency. This study experimentally analyzes the microstructure and sorption performance of the EV/K₂CO₃ composite sorbent. Numerical analysis methods are employed to evaluate the validity of various sorption kinetics models and to elucidate the sorption mechanism and potential limitations of the composite sorbent. The findings indicate that EV can disperse K₂CO₃ salt particles while preserving a porous structure, thereby improving the sorption kinetics efficiency and stability of the EV/K₂CO₃ composite sorbent. At low relative pressure, EV/K₂CO₃ demonstrates a chemical adsorption mechanism, with nucleation models accurately predicting its sorption behavior, primarily limited by the nucleation and growth of hydrated salt crystals. At moderate relative pressure, EV/K₂CO₃ exhibits a mechanism involving both chemical adsorption and solution absorption, with diffusion models and the first-order model showing higher prediction accuracy, primarily limited by diffusion within or outside the product layer. At high relative pressure, EV/K₂CO₃ primarily undergoes solution absorption, with geometric contraction models and the first-order model displaying good predictive performance, primarily limited by the reaction phase interface. This study enhances comprehension of the sorption mechanism of the EV/K₂CO₃ composite, providing a scientific foundation for the development of high-performance TCES materials suitable for building and environmental applications.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 41-53"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141713486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction","authors":"Yang Cai ,&nbsp;Yingxi Huang ,&nbsp;Zhengyu Shu ,&nbsp;Ziquan Liu ,&nbsp;Huaiyu Zhong ,&nbsp;Fuyun Zhao","doi":"10.1016/j.enbenv.2024.08.002","DOIUrl":"10.1016/j.enbenv.2024.08.002","url":null,"abstract":"<div><div>The integration of phase change material (PCM) with building-integrated photovoltaic (BIPV) presents a compelling approach to enhance solar energy utilization and mitigate indoor thermal loads, contributing to energy-efficient and low-carbon building development. Traditional BIPV-PCM structures, however, struggle to balance PV efficiency and thermal insulation, particularly with varying PCM wall positions. To address this situation, this study introduces a novel double-PCM BIPV composite envelope (BIPV-dPCM). An experimentally validated dynamic heat transfer model was developed and used to perform a comparative simulation analysis with three reference systems to quantify the energy-saving potential of the BIPV-dPCM, focusing on PV output and wall insulation effectiveness metrics. Further dimensionless parametric analysis were carried out to investigate the systematic performance of the two PCMs at different relativities. In addition, the coupled working mechanism of the BIPV-dPCM system concerning the power generation performance and thermal insulation performance under transient variations is explored. It was found that the BIPV-dPCM showcases superior thermoelectric coupling performance compared to three alternative enclosures. Incorporating two PCMs significantly enhances electrical exergy efficiency by 11.66 % and thermal exergy efficiency by 1.54 %, surpassing other reference systems. The increase in PCM latent heat ratio has a limited effect on performance gain. Notably, as the PCM thickness ratio exceeds 1, the decline in <em>P</em> value decelerates, for every 0.5 increment in the <em>g</em>, the <em>P</em> value diminishes by merely 0.2 %. The ideal <em>h</em> is identified between 1 and 1.5, with 1.5 being optimal for energy conservation objectives. Additionally, the self-sufficiency coefficient (<em>SSC</em>) of the BIPV-dPCM remains robust, sustaining a range of 55 % to 65 % over prolonged periods. This study offers novel perspectives and serves as a design reference for optimizing building energy systems and enhancing cooling efficiencies in subtropical climates.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 14-27"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}