To　address　the　absence　of　balance　in　existing　heat　and　mass　transfer　structures　and　enhance　their　adaptability　in　high-temperature　and　humid　environments,　a　new　internally　cooled　dehumidifier　has　been　developed.　This　innovative　dehumidifier　incorporates　corrugated　fins　to　increase　disturbance　and　contact　area,　along　with　a　multichannel　flat　tube　to　improve　cooling　efficiency　and　compatibility.　Experimental　research　was　conducted　to　investigate　mass　transfer　characteristics　under　different　air,　solution,　and　cooling　water　conditions　in　a　high-temperature　and　humidy　climate,　and　the　Sh　number　correlation　was　derived.　The　findings　indicated　that　compared　to　previous　designs,　the　new　dehumidifier＇s　performance　is　less　influenced　by　air　temperature　due　to　the　corrugated　fins＇　disturbance　and　cooling　efficiency　of　the　multi-channel　flat　tube.　Additionally,　its　dehumidification　capacity　is　positively　correlated　with　air　humidity,　making　it　well-suited　for　high-temperature,　high-humidity　regions;　The　presence　of　corrugated　fins　enhances　the　disturbance　on　the　solution　surface,　leading　to　a　non-linear　improvement　in　dehumidification　performance　when　increasing　solution　flow;　Lowering　solution　and　water　temperatures　is　more　effective　in　improving　dehumidification　performance　than　increasing　the　flow　rate,　resulting　in　maximum　increases　of　60　%　and　18.3　%,　respectively,　in　mass　transfer　coefficients.　Therefore,　temperature　adjustments　are　recommended　for　operational　optimization;　The　Sh　number　correlation　demonstrates　high　accuracy,　within　±25　%,　ensuring　reliability.　This　study　provides　technical　support　and　a　foundational　dataset　for　the　dehumidifier＇s　application　in　buildings　located　in　high-temperature　and　high-humidity　areas.　©　2023　Elsevier　Ltd