Impact of Fin Arrangement on Heat Transfer and Melting Characteristics of Phase Change Material  

作　　者：Arun UNIYAL Yogesh K.PRAJAPATI 

机构地区：[1]Department of Mechanical Engineering,National Institute of Technology Uttarakhand,Srinagar(Garhwal),246174,India [2]Department of Mechanical Engineering,BIT Sindri,Dhanbad,Jharkhand,828123,India

出　　处：《Journal of Thermal Science》2024年第2期435-456,共22页热科学学报（英文版）

摘　　要：Present work investigates the heat transfer and melting behaviour of phase change material(PCM) in six enclosures(enclosure-1 to 6) filled with paraffin wax.Proposed enclosures are equipped with distinct arrangements of the fins while keeping the fin's surface area equal in each case.Comparative analysis has been presented to recognize the suitable fin arrangements that facilitate improved heat transfer and melting rate of the PCM.Left wall of the enclosure is maintained isothermal for the temperature values 335 K,350 K and 365 K.Dimensionless length of the enclosure including fins is ranging between 0 and 1.Results have been illustrated through the estimation of important performance parameters such as energy absorbing capacity,melting rate,enhancement ratio,and Nusselt number.It has been found that melting time(to melt 100% of the PCM) is 60.5%less in enclosure-2(with two fins of equal length) as compared to the enclosure-1,having no fins.Keeping the fin surface area equal,if the longer fin is placed below the shorter fin(enclosure-3),melting time is further decreased by 14.1% as compared to enclosure-2.However,among all the configurations,enclosure-6 with wire-mesh fin structure exhibits minimum melting time which is 68.4% less as compared to the enclosure-1.Based on the findings,it may be concluded that fins are the main driving agent in the enclosure to transfer the heat from heated wall to the PCM.Proper design and positioning of the fins improve the heat transfer rate followed by melting of the PCM in the entire area of the enclosure.Evolution of the favourable vortices and natural convection current in the enclosure accelerate the melting phenomenon and help to reduce charging time.

关 键 词：phase change material ENCLOSURE FIN melting fraction energy storage heat transfer 

分 类 号：TB34[一般工业技术—材料科学与工程] TK124[动力工程及工程热物理—工程热物理]