Experimental Study on Space Heating Performance of Stratum Ventilation Compared with Mixing Ventilation

A comparative experimental investigation is conducted to evaluate the effectiveness of stratum ventilation in comparison to mixing ventilation for space heating applications. Both objective and subjective experiments are carried out to assess the thermal performance of the two ventilation methods. The objective experiment analyzes the distribution of air temperature, air velocity, and ventilation efficiency in both stratum and mixing ventilation setups. The results demonstrate that stratum ventilation achieves a substantial 25% decrease in energy consumption compared to mixing ventilation. Moreover, the chapter examines considerations related to indoor thermal comfort. Overall thermal perception and comfort, effective draft temperature, and vertical air temperature gradient are employed as evaluation criteria. Implementing stratum ventilation for heating results in a 10.0% enhancement in indoor comfort levels while maintaining the same supply air parameters as mixing ventilation. In conclusion, stratum ventilation exhibits superior performance in terms of energy efficiency and indoor comfort for space heating applications.