پديد آورنده :
رستمي، اميد
عنوان :
بررسي عملكرد ذﺧﯿﺮه ﺳﺎزي انرژي گرمايي مواد تغيير فاز دهنده كپسوله شده در يك بستر فوراني
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
پديده هاي انتقال
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
سيزده،80ص. : مصور، جدول، نمودار
استاد راهنما :
نسرين اعتصامي
استاد مشاور :
ارجمند مهرباني
توصيفگر ها :
ذﺧﯿﺮه ﺳﺎزي اﻧﺮژي ﮔﺮﻣﺎﯾﯽ ﻧﻬﺎن , ﻣﻮاد ﺗﻐﯿﯿﺮ ﻓﺎز دﻫﻨﺪه , ﮐﭙﺴﻮﻟﻪﺳﺎزي , ﺑﺴﺘﺮ ﻓﻮراﻧﯽ , ﺑﺎزده ذﺧﯿﺮه ﺳﺎزي اﻧﺮژي
استاد داور :
مسعود حق شناس فرد، محسن نصر اصفهاني
تاريخ ورود اطلاعات :
1398/10/08
رشته تحصيلي :
مهندسي شيمي
تاريخ ويرايش اطلاعات :
1398/10/09
چكيده انگليسي :
Investigation of Thermal Energy Storage Performance of Encapsulated Phase Change Materials EPCMs in a Spouted Bed Omid Rostami omid rostami@ce iut ac ir December 17 2019 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree Master of Science Language FarsiSupervisor Nasrin Etesami Assoc Prof netesami@cc iut ac ir AbstractLatent Thermal Energy Storage LTES has a broader application compared to sensible heat and chemical en ergy due to higher energy density and energy storage and release in isothermal conditions In this regard theencapsulated phase change material PCM plays a significant role in preventing leakage and increasing heattransfer One of the most practical examples of thermal energy storage is solar energy storage based on a fixedbed fluidized bed and spouted bed Despite the advantages of spouted beds over fixed and fluidized beds noresearch has been conducted on the thermal energy storage performance of phase change materials in spoutedbeds Therefore in the first step of this study the thermal storage performance of a granular encapsulated phasechange material GR42 was investigated in a spouted bed under different operating conditions So firstly theinfluence of the increasing mass of PCM in the spouted bed 50 and 90 gr and excess air velocity of 1 3 timesover the minimum spouting velocity on the energy storage efficiency was investigated Then the influence ofthe increasing inlet airflow rate at a constant temperature and the increasing inlet air temperature at a constantairflow rate on the energy storage efficiency was investigated The results showed that increasing the mass ofPCM in the bed results in a 16 increase in energy storage efficiency Increasing the airflow rate at a constanttemperature and inlet air temperature at a constant airflow rate decreased energy storage efficiency by 45 and42 respectively during the charging process Analysis of the influence of the mean particle size of PCM onthe energy storage showed that spout airflow rate increased by increasing the mean particle size which reducedthe energy storage time Thereby the bed remained at a certain temperature for a longer period This was alsoexperienced in fine and coarse particles mixture so using the particle mixture in the applications that requireremaining at a certain temperature is a better option Also a comparison was conducted between energy storageperformance of fixed fluidized and spouted beds under constant conditions Experimental results showed thatthe storage efficiency of the spouted was 48 and 21 higher than fixed and fluidized beds respectively Inthe end a sample of encapsulated phase change materials was produced in the laboratory and its thermal energystorage performance in the spouted bed was evaluated and compared with the commercial sample The resultsof the study between the commercial and the laboratory material showed that the laboratory material had 35 better performance in energy storage The higher energy storage efficiency of the laboratory encapsulated ma terial along with lower weight and density compared to the commercial one demonstrates the high capabilityof the produced material for use in solar energy storage systems or building panels KeywordsLatent Thermal Energy Storage LTES Phase Change Materials PCM Encapsulation Spouted bed Energystorage efficiency
استاد راهنما :
نسرين اعتصامي
استاد مشاور :
ارجمند مهرباني
استاد داور :
مسعود حق شناس فرد، محسن نصر اصفهاني
