Computational Simulation Of Fan Coil Units And Study Of Uniformization Of The Head-on Flow Field Of The Coil

By investigating into the thermodynamic performance of fan coil units, a new subject for discussion is put forward in this thesis. A mathematical model of the head- on flow field of the coil is built and the result of the numerical simulation can predict the characteristic of the flow field well. A mathematical model of the coil pipe heat exchanger is established based on the theory of thermodynamics. With the simulation program, which is made based on the model, the thermodynamic performance of the fan coil units in different operating condition is predicted. In addition, the experimental results verify the reliability of the model. According to the results of the num&ical simulation and the measure of experiment to the head-on flow field of the coil, we find that the flow distribution is fairly uneven. We analysis the relationship between the air speed and the thermos- dynamic performance in this thesis. The degree of uniformity of the airflow can heavily effect the heat exchange efficiency and heat exchange of the fan coil units. Some possible methods to improve the evenness of air distribution are proposed in this paper. And the experimental results demonstrate the means we used is feasible. The author also designed a laboratory bench for metering the airflow and the heat exchange of fan coil units. The software made in this thesis can be ud in the designing of the fan coil units.