The　conjugated　convection-conduction　heat　transfer　from　a　vertical　steel　plate　with　discrete　heat　sources　simulating　the　heating　pipes　of　the　wrapped-type　heat　exchanger　is　investigated　experimentally　and　numerically.　The　temperature　of　the　plate　distributes　wavily　along　the　height　direction　and　the　wave　amplitudes　increase　with　the　widening　heating　space　under　both　heat　flux　and　temperature　conditions.　The　expressions　of　the　average　Nusselt　number　and　Rayleigh　number　computed　by　the　average　heater　temperature　remain　as　Num　being　equal　to　cRan,　where　c　and　n　are　the　functions　of　heating　space　respectively.　The　correlations　are　obtained　via　fitting　the　experimental　data　with　error　±5%　within　range　of　Ra　from　5　×　108　to　5　×　109.　The　numerical　results　show　that　the　uneven　temperature　distributions　of　the　plate　lead　to　increase　of　the　velocity　boundary　layer　thickness　and　fluctuation　of　the　local　Nusselt　number　along　vertical　direction.