Effects of PCM Mass on Heat Dynamics and Thermal Performance of Solar Air Heaters: A Numerical and Analytical Study
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
View: 239
This Paper With 9 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JREE-8-3_006
تاریخ نمایه سازی: 19 مرداد 1400
Abstract:
Utilizing thermal storage units such as Phase Change Materials (PCMs) is a suitable approach to improving Solar Air Heaters (SAHs). The present study tries to assess the effects of PCM mass values on the heat dynamics and thermal performance of SAHs. To this aim, an analytical thermodynamic model was developed and validated by available experimental data. This model provides a robust numerical framework to model the phase change phenomenon and analyze the heat dynamics and thermal performance of SAH using various PCM masses. Four scenarios were considered using the developed analytical model including SAHs using ۰, ۳۰, ۶۰, ۹۰ kg PCM. The obtained results illustrated that the maximum outlet temperature was reduced, approximately near ۲۰ %, by increasing the PCM mass between ۰ and ۹۰ kg; however, heating time was extended to periods when solar energy availability was inadequate. The thermal performance improved by nearly ۱۴.۵ % in the SAH using ۹۰ kg PCM mass compared to the SAH without using PCM. The thermal performance of the SAH with ۹۰ kg PCM was slightly higher than the SAH using ۳۰ kg of PCM; hence, a significant portion of stored thermal energy was lost during nighttime through heat exchange with ambient surroundings. The obtained results also showed that despite available latent thermal energy, the outlet air temperature profiles for the SAHs using different PCM mass were close after sunset due to the low thermal conductivity of paraffin.
Keywords:
Authors
Ehsan Hasan Zaim
Department of Mechanical Engineering, School of Engineering, Sirjan University of Technology, P. O. Box: ۷۸۱۳۷-۳۳۳۸۵, Sirjan, Kerman, Iran.
Hadi Farzan
Department of Mechanical Engineering, School of Engineering, Higher Education Complex of Bam, P. O. Box: ۷۶۶۱۵-۳۱۴, Bam, Kerman, Iran.
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :