Energy and Buildings最新文献

{"title":"Surface temperature distribution prediction model for prefabricated ceiling radiant panel","authors":"Mingwu Tang, Xiaozhou Wu, Yunfeng Wang, Dong Liu, Jun Wang, Zhong Li, Airong Feng, Xiangli Li","doi":"10.1016/j.enbuild.2024.115200","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115200","url":null,"abstract":"Prefabricated ceiling radiant panel is one type of efficient and lightweight radiant heating and cooling terminal, which has been widely used in many commercial and residential buildings. The surface temperature distribution of radiant terminal is a crucial factor that affects the local thermal discomfort for heating and the surface condensation risk for cooling. However, the existing research on surface temperature distribution lacked a correlation with the average surface temperature prediction model, which was not convenient for guiding the design and control of radiant heating and cooling systems. Therefore, this paper proposed a new simplified model of radiant panels, and the calculation errors of heat transfer and average surface temperature were within ±5 % and ±1 %, respectively. Furthermore, a surface temperature distribution prediction model was established, and the definition of surface temperature uniformity was also determined through derivation. The calculation results indicated that the root mean square error between the predicted surface temperatures at each measurement point and experimental values was 0.8 °C for heating and 0.4 °C for cooling, and the corresponding relative errors of surface temperature uniformity were 5.7 % and 8.9 %. Finally, the effects of water supply temperature, water mass flow rate, pipe spacing, pipe diameter and thickness of heat distribution plate on the surface temperature distribution were quantitatively analyzed. The results showed that the water mass flow rate, pipe spacing (more than 150 mm) and the thickness of the heat distribution plate clearly influenced the surface temperature uniformity.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"78 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841249","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":"A novel solution for data uncertainty and insufficient in data-driven chiller fault diagnosis based on multi-modal data fusion","authors":"Yuwen You, Yuan Zhao, Yan Ke, Junhao Tang, Bin Yang","doi":"10.1016/j.enbuild.2024.115197","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115197","url":null,"abstract":"Accurate fault diagnosis of chillers is essential for extending equipment lifespan and reducing energy consumption. Currently, data-driven diagnostic models for chillers exhibit impressive performance. However, the outstanding performance is only guaranteed in condition of sufficient and high-quality data, i.e., data is often uncertain and insufficient. To resolve this problem, this study proposes a novel multimodal co-learning framework based on infrared thermography (IRT) and operational state parameters. State parameters, referred as evidence source 1, undergo data augmentation using conditional Wasserstein generative adversarial networks (CWGAN) before classification by a base classifier. IRTs referred as evidence source 2, are enhanced through a method called self-attention BAGAN with gradient penalty (SA-BAGAN-GP). Self-attention mechanisms is integrated in the encoder layer to capture critical features to produce high-quality samples. Then, generated IRT samples are then classified using the self-attention convolutional neural network (SA-CNN) model. Finally, Dempster-Shafer (D-S) evidence theory is utilized for the fusion of decision information from both modalities. By simultaneously capturing and integrating data from diverse sources, the model improves generalization and robustness. Experimental validation conducted on actual chillers demonstrated an average accuracy of 92.75% across four cross-condition tasks, with noise test accuracy ranging from 89.2% to 99.6% and outlier test accuracy between 98.5% and 99.4%.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"30 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841250","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":"Study on a ventilating vest with thermoelectric cooling to improve thermal comfort and cognitive ability","authors":"Haiying Wang, Guangyan Zhang, Huxiang Lin, Junli Sun, Rengjie Yan, Hang Meng, Songtao Hu, Hui Zhu","doi":"10.1016/j.enbuild.2024.115188","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115188","url":null,"abstract":"Hot waves happened more often in summer due to the global climate change, which leads to hot indoor environment when air conditioning systems are absent. To improve individual thermal comfort in warm/hot indoor environment, a ventilating vest with thermoelectric cooling (TEC) was proposed. The design of TEC module and ventilating vest was introduced. The measured cooling capacity of cooling vest was about 25 W, including both sensible and latent heat. The effect of cooling vest on thermal comfort and cognitive ability was tested in the 29 °C, 31 °C and 33 °C environments. 18 male subjects were recruited to participant in the experiments. Subjective questionnaires including thermal sensation vote, thermal comfort vote, thermal acceptance vote, sweat feeling vote, and cold stimuli sensation vote were collected. Three cognitive tests were conducted including the Stroop test, typing test and number remember test. Physiological parameters including skin temperature, core temperature, local skin heat flux and heart rate variability (HRV) were measured. Results showed that continuous exposure to hot environment made the subjects felt hotter, more uncomfortable, more unbearable and sweatier. With the use of ventilating vest, all these subjective votes were improved significantly. With the ventilating vest, the skin temperatures of chest and back decreased a little, the decline was more significant in 33 °C. The mean skin temperature kept increasing during hot exposure, while the vest stopped the further increasing and reduced it slightly. When cooling vest was used, the core temperature was decreased by 0.05 °C, 0.3 °C, and 0.5 °C in the three temperature conditions, while the local skin heat flux increased approximately 4.8 % to 33.3 %. With the use of ventilating vest, the HRV indices of SDNN (Standard Deviation of Normal to Normal Intervals) and RMSSD (Root Mean Square of Successive Differences) were increased, while the LF/HF (Low Frequency to High Frequency Ratio) was decreased. Subjects’ cognitive performance in the three tests were also improved significantly when the vest was used.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"39 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841251","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":"Field study on pressure differential mechanisms under static and dynamic disturbances in non-isobaric building zones","authors":"Yufan Chang, Zhengtao Ai, Jie Zong, Zhongbing Liu, Weichao Zhang","doi":"10.1016/j.enbuild.2024.115183","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115183","url":null,"abstract":"Deviation of pressure differential from design under static conditions and delayed convergency of pressure fluctuation after dynamic disturbances are widely reported problems associated with pressure differential control in non-isobaric buildings. This study performed field measurements to investigate the pressure differential mechanisms under static and dynamic disturbance in several non-isobaric pharmaceutical factory zones served by either constant air volume or variable air volume (VAV) ventilation systems. Four typical dynamic disturbances including door motion (the process of door opening or closing for 1 s, 2 s, and 3 s), personnel entry and exit, indoor personnel movement, and continuous door opening were considered. The results showed that static pressure differentials deviated significantly from the design requirements, and some of the pressure differentials were even reversed in direction. Depending on the location of the sensor, it took 3–13 s and 3–10 s to detect and stabilize the pressure differential within the zone during door openings and door closings, respectively. Personnel entry and exit induced inevitable brief but intense disturbances in the pressure differential evolution. Ceiling-mounted pressure sensors could not detect fluctuations caused by indoor personnel movement, thus preventing erroneous responses from proportional-integral-derivative (PID)-based VAV valves. However, the VAV valve exhibited slow response and ineffectiveness during door motion and continuous door opening due to unsuitable PID parameters and low-accuracy pressure sensors. To improve the control strategy, exponential models based on the pressure differential evolution during door motion were proposed. The findings provide useful information for real-time and accurate pressure differential monitoring and for developing effective VAV ventilation strategies.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"12 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841466","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":"Indoor-outdoor interactive thermal response in public building:onsite data collection and classification through cluster algorithm","authors":"Zhineng Jin, Yin zhang, Hongli Sun, Meng Han, Yanhong Zheng, Ying Zhao, Wenyang Han, Menglong Zhang, Bin Xu, Zequn Zhang, Borong Lin","doi":"10.1016/j.enbuild.2024.115175","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115175","url":null,"abstract":"Efficient thermal environment control in large public buildings with atria is critical for reducing energy consumption and carbon emissions. This study investigates the indoor thermal environments of two distinct atria in Suining, China, within a Hot Summer and Cold Winter (HSCW) climate zone. A novel methodology combining K-means clustering algorithms and multiple linear regression (CAMLR) was employed to analyze extensive thermal data from a transitional atrium and a traditional atrium. CAMLR significantly outperformed Traditional Building Thermal environment analysis Methods (TBTM), achieving a 33.8 % higher R<ce:sup loc=\"post\">2</ce:sup> and reducing the residual sum of squares by 62.11 %. Key findings include: 1) A strong correlation (R<ce:sup loc=\"post\">2</ce:sup> = 0.9555) between outdoor temperature and indoor thermal conditions in the transitional atrium, highlighting a critical outdoor temperature threshold of 30 °C that leads to prolonged indoor heat retention. 2) Solar radiation plays a dominant role in the traditional atrium (R<ce:sup loc=\"post\">2</ce:sup> = 0.5584), influencing rapid temperature fluctuations. These insights underscore the critical role of atrium design in optimizing thermal performance and energy efficiency. Compared to TBTM, CAMLR provides faster, more accurate, and highly visualized data analysis, making it particularly suitable for complex thermal environment studies. This study establishes CAMLR as a robust tool for advancing thermal management strategies in large public buildings, offering practical guidance for energy-efficient architectural designs in similar climate zones.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"41 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841255","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":"Developing a spatial optimization design approach towards energy-saving and outdoor thermal comfortable densely-built residential blocks using a dynamic local energy balance model","authors":"Lin Liu, Zihong Zhang, Shiying Lan, Xiaoyu Tian, Jing Liu, Wei Liao, Dan Wang","doi":"10.1016/j.enbuild.2024.115194","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115194","url":null,"abstract":"Towards the dual goals of energy conservation and outdoor thermal comfort, this study proposed a parametric-oriented optimization design technology for densely-built residential blocks based on the dynamic local energy balance (DLEB) model. The DLEB model was corrected by hourly error formulas based on the field measurement data conducted in Guangzhou, China, which used six local climate zone-derived spatial morphological parameters as inputs. Additionally, the corrected DLEB model was improved by adding dual-goal calculation modules of building energy consumption and physiologically equivalent temperature. Orthogonal experiments were designed considering five parameters: building density, floor, and the area ratios of greenland, woodland, and water. A comprehensive indicator (CI) reflecting lower building energy consumption and higher outdoor environmental thermal comfort was used to design the objective function. Then, the corrected DLEB model was used to calculate the hourly environmental parameters and the CI of different cases. Results found that wind-thermal environments were affected by background weather and spatial morphological parameters. The error formulas show higher fitting effects with the goodness of fit higher than 0.4. A parametric-oriented spatial optimization strategy for high-density residential blocks was formed by determining the suitable value ranges of each spatial variable. The recommended building density ranged from 0.45 to 0.5, building floors were 10 ∼ 20 floors, and the area ratio of Greenland and woodland ranged from 0.25 to 0.4. Building floors and density contributed 48 % and 43 % to the comprehensive indicator, respectively. This study provides theoretical and technical guidance in dual-goal densely built residential areas.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"13 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841252","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":"Mitigating heat stress for agricultural workers using computational fluid dynamics (CFD) simulations","authors":"Yoonhong Yi, Neslihan Akdeniz, Christopher Y. Choi, John M. Shutske","doi":"10.1016/j.enbuild.2024.115186","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115186","url":null,"abstract":"The Venlo ventilation system is one of the most widely adopted designs for greenhouses, and it is known for its distinctive roof structure that promotes natural airflow. However, despite its widespread use, it is often inadequate in maintaining the desired temperatures during the summer. This increases the risk of heat stress for greenhouse workers, particularly under the high humidity conditions typically encountered in aquaponic greenhouses. In this study, we developed computational fluid dynamics (CFD) models simulating temperature and air velocity distributions using a commercial-scale Venlo-style aquaponic greenhouse as a reference. The study aimed to evaluate the impact of applying reflective whitewash and installing positive pressure ventilation tubes (PPVT) in worker areas on the heat stress experienced by the workers. The standard k-ε turbulence and solar ray tracing models were employed in CFD simulations. A total of 1,776 lettuce at three different growth stages were placed inside the aquaponic pools. The CFD models were validated using an experimental-scale greenhouse, and with these validated models, air velocities at the worker’s height were calculated to be 3.1±0.13 m s<ce:sup loc=\"post\">−1</ce:sup>, 3.2±0.16 m s<ce:sup loc=\"post\">−1</ce:sup>, and 3.8±0.04 m s<ce:sup loc=\"post\">−1</ce:sup> for the control, whitewash, and PPVT + whitewash conditions, respectively. When whitewash and positive pressure ventilation tubes were both in use, the air exchange rate increased from 27.3 to 31.8 per hour. Although there was only a 4.5 increase in air exchanges, strategically placing the ventilation tubes resulted in a 7.3 °C decrease in temperature at the average worker height. This reduction shifted the heat index from the “extreme danger” to the “caution” zone, allowing workers to safely work up to four consecutive hours with adequate water intake. The annual cost for running the PPVT inline fans was calculated to be as low as $245, which was 2.6 times less than the previously reported operating costs for greenhouse ventilation systems.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"13 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841254","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":"Development and application of a digital twin model for Net zero energy building operation and maintenance utilizing BIM-IoT integration","authors":"Zhansheng Liu, Mingming Li, Weiyu Ji","doi":"10.1016/j.enbuild.2024.115170","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115170","url":null,"abstract":"Net Zero Energy Buildings (NZEB) represent a significant opportunity to reduce building energy consumption and achieve the climate and energy goals that will be necessary in the future. Nevertheless, the effective operation and maintenance (O&amp;M) management of NZEB remains a significant challenge. This is largely due to the inadequate management of the O&amp;M phase and the lack of comprehensive data integration and application. Accordingly, this study proposes an O&amp;M digital twin modeling approach for integrating data in the O&amp;M phase of NZEB and realizing efficient management. The twin modeling process comprises data collection, model construction, simulation analysis, and validation iteration. Empirical evidence demonstrates that the proposed twin model markedly enhances the utilization efficiency of O&amp;M data, facilitating the perception, visualization, and automated feedback control of NZEB. The proposed digital twin modeling method offers technical guidance for O&amp;M managers seeking to achieve efficient O&amp;M management of NZEB.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"14 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841256","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":"A novel clustering based operating strategy of heat pump desiccant wheel system for low-humidity environments","authors":"Yixiang Huang, Shaochen Tian, Haoran Liu, Lei Huang, Shangao Li, Qinbao Wang, Xing Su","doi":"10.1016/j.enbuild.2024.115174","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115174","url":null,"abstract":"In various industrial manufacturing scenarios, maintaining a low humidity environment with a low dew point temperature (DPT) is crucial. Significant energy consumption is incurred during dehumidification processes. The Heat Pump Desiccant Wheel (HPDW) system emerges as an effective solution to regulate indoor temperature and humidity under such conditions. To improve the energy efficiency of HPDW systems, this study proposes a load clustering-based methods to optimize operation and develop tailored strategies. A comparative analysis of operating strategies and model-based optimization for a selected low-humidity environment is conducted. The results reveal that strategies integrating outdoor humidity ratio with hybrid conditions are effective in achieving the desired low humidity environment. Under these strategies, the system’s indoor humidity failure duration is reduced to 48 h and 197 h annually, respectively. The low-humidity environment can be maintained at a maximum indoor humidity ratio of 4.0 g/kg DA and 4.5 g/kg DA, respectively. Furthermore, the load clustering-based strategy successfully decouples control parameters and enhances the dehumidification performance, particularly during heating season and transitional seasons, through improved regeneration processes. Additionally, adopting a non-minimum outdoor air volume strategy achieves a notable 8.3 % energy savings, equivalent to approximately 15,000 kWh. When applying a strategy based on minimum outdoor air flow, maximum indoor humidity ratio of 3.89 g/kg DA and system’s failure duration of 7 h can be achieved. The design outdoor condition in Shanghai, with a temperature of 36.8 °C and a humidity ratio of 26.13 g/kg DA, can be selected as the most unfavorable input parameters for system design and operation during the cooling season. This study offers practical insights into optimizing HPDW systems for energy-efficient dehumidification in low humidity industrial environments.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"55 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841310","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":"Enhancing thermoregulation in double glazed windows with PCMs and black films: An experimental study","authors":"Emre Mandev","doi":"10.1016/j.enbuild.2024.115171","DOIUrl":"https://doi.org/10.1016/j.enbuild.2024.115171","url":null,"abstract":"This study presents an experimental analysis of the thermoregulation characteristics of double-glazed windows integrated with phase change material (PCM) packages and black film coatings. The research focuses on varying the PCM area ratios (ARs) within the vertical glazing, specifically 15 %, 30 %, and 45 %, to evaluate their impact on thermal management and thermoregulation. The experimental setup consists of a test chamber subjected to controlled heating and cooling cycles, utilizing constant and continuous solar radiation. Temperature fluctuations and light intensity levels were recorded to assess the performance of the PCM packages, both with and without black film coatings. The results indicate that incorporating PCM into the glazed units significantly enhances thermal management by stabilizing temperature variations and delaying the attainment of steady-state conditions. The peak temperature in the test chamber with 45 % AR PCM packages during the heating period is 3.9 °C lower than that of the reference case; however, during the cooling period, temperatures remain above the reference case. This effect allows the indoor environment to maintain a temperature trend that is more aligned with thermal comfort conditions. Additionally, the application of black film coatings improved thermal absorption, leading to slightly higher temperatures (up to 2.6°C) in the PCM-filled units, but also resulted in a reduction in light transmittance. Specifically, light intensity decreased by 68 % in the 45 % AR case compared to the reference, with an additional 8–11 % reduction due to the black film coating. These findings highlight the dual role of PCM and black film in enhancing thermal comfort, while also acknowledging the trade-offs in natural lighting.","PeriodicalId":11641,"journal":{"name":"Energy and Buildings","volume":"10 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841315","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}