Investigation of thermal features of latent heat thermal energy storage with internal fins

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

The present study includes a numerical and experimental verification of the thermal properties of PCM placed in a horizontal annular latent heat thermal energy storage (LHTES) unit with the addition of internal fins. The energy storage device has a length of 500 mm consisting of a thermally insulated outer shell made of transparent plastic with a diameter of 75 mm and an inner copper tube used to transport the heat transfer fluid (water), with a diameter of 25 mm. The space between the inner tube and the outer shell is filled with a phase change material of the RT 42 paraffin wax type.Three models of LHTES are tested and investigated: unfinned, X-shape fin distribution, and below-distribution fin. The fin/PCM mass ratio is constant for two finned storage units. The longitudinal fin has a length of 500 mm and a height of 20 mm and is attached to the internal tube of the LHTES unit. The enthalpy-porosity method was used to solve the two-dimensional numerical model of the PCM melting problem. The effect of various hot water inlet temperatures (60, 70, and 80 °C) on the melting time was investigated experimentally and numerically.By monitoring the melting process, the results showed a significant convergence between the numerical and practical results. Natural convection and overheating dominate the melting at the top part of the unfinned storage unit, while thermal conduction with a low melting rate controls the bottom part. Inserting fin suppresses overheating in the top part and increases the melting rate at the bottom part of the thermal storage unit. Also, increasing the HTF (water) inlet temperature has a significant effect on reducing the melting time; the melting time was reduced by 31 % and 45.5 % by increasing the water inlet temperature from 60 to 70 °C, and from 60 to 80 °C, respectively. The greatest numerical and experimental reductions in charging time due to using a below-fin distribution unit compared to an unfinned unit instead are 79.31% and 77.75 %, respectively, at a water inlet temperature of 80 °C. At the same time, the numerical and experimental reductions in charging times are 79% and 78, respectively, at a water inlet temperature of 70 °C.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0ff20597-0cdc-4ae0-96f6-a2049e9841e5

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1085815_1.pdf

بيانات النشر

ترجمة العنوان

تحري السمات الحرارية لتخزين الطاقة الحرارية الكامنة مع الزعانف الداخلية

ألقاب المؤلفين

[{"name_ar":"حيدر عبدالخالق عزيز","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"فاضل نور الدين الموسوي","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"نبيل شهيد ضيدان ","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Investigation of thermal features of latent heat thermal energy storage with internal fins

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

PCM, Charging, LHTES, Natural convection, Mushy zone constant, Melting time.

إشراف وإعداد

الإشراف

فاضل نور الدين الموسوي, نبيل شهيد ضيدان

الإعداد

حيدر عبدالخالق عزيز

الاقتباسات الببليوغرافية