Yazar "Mandev, Emre" seçeneğine göre listele

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    Thermal performance evaluation of PCM-integrated interior shading devices in building glass facades
    (Elsevier, 2025) Celik, Ali; Mandev, Emre; Ersan, Orhan; Muratcobanoglu, Burak; Ceviz, Mehmet Akif; Kara, Yusuf Ali
    This study investigates the thermal performance and energy efficiency potential of Phase Change Material (PCM)-integrated interior shading devices installed within double and triple-glazed facades. The primary aim is to explore how these systems can enhance indoor thermal comfort, reduce energy consumption, and impact natural lighting levels. A test cabin was designed to evaluate these parameters, featuring double and triple-glazed panels with integrated shading devices containing microencapsulated PCMs. The PCMs, known for their ability to store and release thermal energy through phase changes, were utilized to mitigate indoor temperature fluctuations by absorbing excess solar heat during the heating period and releasing it during the cooling period. Experimental results revealed that the combination of triple glazing, shading devices, and PCM led to significant improvements in thermal performance, reducing temperature peaks and extending the cooling period compared to systems without PCM. The integration of PCM reduced the maximum temperature difference caused by heating and cooling cycles from 26.9 degrees C to 20.1 degrees C in double-glazed windows and from 19.8 degrees C to 12.4 degrees C in triple-glazed windows. Furthermore, PCM integration was shown to delay temperature rises by acting as a thermal buffer, thus stabilizing indoor conditions and reducing the load on cooling systems. Additionally, light intensity measurements were conducted to assess the impact of the shading devices on natural daylight levels. Despite the 35 % reduction in natural lighting caused by the shading devices, the overall thermal performance and energy saving potentials were substantial, highlighting the effectiveness of PCM as a passive thermal regulation material. This study provides valuable insights into the potential of PCM-enhanced shading devices as a solution for improving energy efficiency and occupant comfort in modern buildings.
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    Thermal performance investigation of microencapsulated phase change material enhanced with graphene nanoplatelets in double-glazing applications
    (Elsevier Science Sa, 2024) Celik, Ali; Ceviz, Mehmet Akif; Kara, Yusuf Ali; Mandev, Emre; Muratcobanoglu, Burak; Afshari, Faraz; Manay, Eyuphan
    Effective heat energy storage is crucial for thermal energy management. The utilization of latent heat storage methods is widely prevalent across various engineering applications for enhancing energy efficiency. In this study, the energy storage performances of Phase Change Materials (PCMs) achieved by incorporating graphene nanoplatelets into a microencapsulated PCM were experimentally analyzed for double-glazing applications. Changes in thermal energy storage and heat transfer performance by incorporating graphene nanoplatelets into the PCM at two different mass ratios (1 % and 0.1 %) were investigated. The results obtained from light intensity and temperature measurements, as well as thermal camera imaging, were evaluated together. The results support the contribution of graphene nanoplatelets addition to microencapsulated PCMs in enhancing thermal performance during both heating and cooling periods. Among the investigated cases, the highest mass ratio of 1 % graphene nanoplatelets addition led to a major 10 degrees C increase in peak temperature compared to the reference condition. In contrast, this increase in peak temperature was accompanied by a mere 14 % decrease in average light levels. This research underlines the potential of graphene-enhanced microencapsulated PCMs in optimizing thermal management systems for double-glazing applications, offering a promising pathway towards enhancing energy efficiency and thermal comfort in building environments.