This　paper　concerns　enhancement　of　melting　performance　in　a　shell　and　tube　thermal　energy　storage　device　containing　different　structures　and　materials.　Four　enhanced　approaches　including　topology　optimized　fin,　metal　foam,　longitudinal　fin　and　form-stable　composite　phase　change　material　(PCM)　were　evaluated　and　compared　numerically.　Two　sets　of　publish　data　from　literatures　were　used　to　validate　the　numerical　codes　for　the　longitudinal　fin　and　metal　foam,　and　two　experiments　were　built　to　verify　the　models　for　the　topology　fin　and　composite　PCM.　A　criterion　of　TES　rate　per　unit　cost　referring　to　the　ratio　of　TES　rate　to　material　price　was　employed　to　assess　the　economic　efficiency　of　these　enhancement　approaches　from　the　perspective　of　material　cost.　The　results　indicated　that　the　device　melting　process　can　be　significantly　accelerated　by　the　use　of　enhancement　structure　with　the　melting　time　respectively　being　shortened　by　88%,　86%,　84%　and　83%　for　the　devices　containing　topology　fin,　metal　foam,　longitudinal　fin　and　composite　PCM　compared　with　the　device　containing　no　enhancement　configuration.　The　use　of　metal　foam　or　composite　PCM　in　the　topology　fin　based　device　could　achieve　a　further　enhancement　on　the　melting　performance.　For　the　topology　fin　device　containing　the　composite　PCM　and　metal　foam,　the　total　melting　time　can　be　respectively　reduced　by　10%　and　15%　in　comparison　with　the　device　containing　only　topology　fin.　The　selection　of　optimal　enhancement　structure　can　be　related　to　the　price　ratio　of　the　additive　to　the　PCM,　and　the　implementation　of　topology　fin　would　be　an　economical　solution　to　realize　the　combined　enhancement　of　heat　transfer　rate　and　material　utilization　efficiency　if　the　price　ratio　of　the　topology　fin　to　the　PCM　can　be　controlled　to　less　than　8.