This　work　concerns　the　investigation　of　the　charging　and　discharging　performance　of　a　finned　shell　and　tube　device　that　utilized　for　low　and　medium　temperature　thermal　energy　storage　application.　An　experimental　rig　is　built　for　evaluation　in　which　a　so-called　solid-solid　phase　change　material　of　pentaerythritol　is　used　as　energy　storage　substance　and　air　is　employed　as　heat　transfer　fluid.　The　PE　has　tested　to　have　a　melting　temperature　range　of　185-205　degrees　C　and　a　latent　heat　of　290　kJ/kg.　The　study　first　examines　the　effect　of　fin　number　on　the　device　thermal　performance　by　considering　configurations　with　4,　6,　8,　and　10　fins.　Then　the　impact　of　fin　height　is　evaluated　where　four　different　fin　heights　of　9　mm,　14　mm,　19　mm　and　24　mm　is　investigated,　and　finally　the　influence　of　heat　transfer　fluid　working　condition　is　explored.　The　results　indicate　that　the　PE　could　be　ideal　PCM　utilized　in　shell-tube　typed　thermal　energy　storage　device.　The　enhancement　of　fin　number　and　fin　heigh　can　largely　improve　both　the　charging　and　discharging　performance　of　the　device.　For　a　given　air　inlet　pressure　of　0.1　MPa,　the　device　having　fin　number　of　10　and　fin　height　of　19　mm　could　be　identified　as　the　optimal　configuration　for　heat　transfer,　and　at　such　working　conditions,　the　device　achieves　a　charging　efficiency　of　91.49　%　and　a　discharging　efficiency　of　86.4　%.