To address the capacity mismatch between heat injection and thermal diffusion in thermally activated walls, a design with enhanced heat injection design (ETAW) is proposed for improving energy storage efficiency and energy-saving potential. Dynamic heat transfer modeling was employed to comparatively analyze thermal performance differences among ETAW, conventional thermally activated walls (CTAW), and conventional energy-saving walls (CW). Local sensitivity analysis was conducted to investigate the economic impacts of fin parameters, climate factors, and insulation thickness. Results demonstrate that ETAW significantly outperforms CTAW and CW in dynamic thermal behavior, though performance varies with heat injection modes. Increasing trunk fin size and Branch fin size both effectively reduce ETAW"s total operating energy consumption and costs, with Branch fin size exhibiting more pronounced influence. Selecting smaller inclination angle of branch fin (e.g. 60°) and left-oriented installation can reduce operating costs and energy consumption by approximately 10.9 % and 10.7 % respectively. Insulation thickness shows strong correlations with energy efficiency and economic performance, with recommended reduction rates not exceeding 40 % in severe cold zones and extendable to 60 % in hot summer zones.