Using　heat　pipes　as　the　heat　transfer　component　in　latent　heat　thermal　energy　storage　system,　a　set　of　heat　pipe　heat　exchanger　with　latent　heat　storage　was　designed　and　manufactured.　Paraffin　was　adopted　as　phase　change　material　(PCM),　and　a　series　of　experiments　about　charging　(melting)　and　discharging　(solidification)　of　the　device　were　performed;　With　the　temperature　distribution　of　paraffin　got　from　these　experiments,　the　analysis　of　the　effects　of　the　inlet　water　temperature　and　water　flow　rate　on　the　charging　and　discharging　process　were　carried　out.　Energy　stored/recovered　verse　time　during　charging　and　discharging　were　presented.　The　results　show　that　heat　pipe　plays　its　full　role,　the　device　works　well,　and　all　its　functions　can　be　realized.