This study innovatively developed an experimental radiate air conditioning system combining symmetrical wall surface radiation with an attached jet flow, and systematically investigated its indoor thermal comfort and energy consumption characteristics under varying supply water temperatures (12°C–22°C) through experimental methods. Conducted under summer conditions spanning from June to October, the results demonstrated that the hybrid system exhibited superior performance at an optimal supply water of 22°C, achieving not only uniform distribution of indoor temperature and humidity but also significantly enhanced thermal comfort while effectively reducing energy consumption. Compared with conventional air conditioning systems, this system demonstrated remarkable advantages in radiant heat transfer ratio 46.12%, while the Level I and Level II comfort compliance rates were 68.33% and 89.33%, mitigating the vertical temperature non-uniformity and condensation risk inherent in traditional radiant air conditioning. This research provides experimental evidence and optimization strategies for the efficient utilization of low-grade cold sources in retrofitting existing buildings.
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