Theory analysis of heat and moisture diffusion strengthened by the pulse blowing.

In air conditioning system, air blowing patterns have very important influence on the comfortable state and the energy consumption of air conditioning environment. When pulse-blowing pattern is adopted, different density particle can gain different acceleration due to the change of airflow acceleration in pulse blowing. For the particle with higher temperature and larger humidity, its density is smaller and its acceleration is smaller in pulse blowing. For this reason, pulse-blowing pattern makes air with different temperature and humidity mix strongly, which increases largely heat and moisture diffusion coefficient and strengthens the diffusivity of heat and moisture in airflow and improves the comfortable state in air conditioning environment. Aimed at the above discussed, the paper has systematically and thoroughly proved that pulse-blowing pattern can improve the comfortable state and reduce the energy consumption of air conditioning environment by means of theory and experiment study. The result studied provides the basis for the determination of blowing pattern in air conditioning system.