Molten　salt　and　supercritical　carbon　dioxide　(sCO(2))　are　considered　to　be　one　of　the　most　promising　combined　heat　transfer　refrigerants　for　third-generation　solar　thermal　power　generation.　To　evaluate　the　potential　of　chloride　salts　and　carbonates　in　third-generation　solar　thermal　power　generation,　this　paper　uses　molten　salts　and　sCO(2)　as　the　working　media　of　printed　circuit　board　heat　exchangers　(PCHE),　and　uses　numerical　simulation　to　study　the　heat　transfer　and　friction　of　PCHE　channels　with　different　molten　salts　and　sCO(2),　and　establishes　predictive　correlations　respectively.　A　local　heat　transfer　and　friction　study　was　conducted　on　the　sCO(2)　side　of　the　airfoil　channel,　and　it　was　found　that　the　inlet　mass　flow　rate　has　a　significant　impact　on　it,　while　the　inlet　temperature　has　a　relatively　small　impact.　A　comprehensive　comparison　was　made　between　the　heat　transfer　and　friction　of　two　molten　salts,　and　the　comprehensive　performance　of　chloride　salts　was　70%-80%　higher　than　that　of　carbonates.　The　results　indicate　that　the　potential　of　chloride　salts　in　third-generation　solar　thermal　power　generation　is　much　greater　than　that　of　carbonates.