Research On The Indoor Units Of VRV Systerm

Variable refrigeration volume air conditioner (VRV) is widely used recently due to its merits such as effectiveness. comfortably. There stands obvious technology gap between home and abroad due to the complexity of VRV Air Conditioning System. Furthermore, It has the important meanings and value to research because of the variety of VRV air conditioners.In this thesis. the performance of the VRV system is studied by the way of mathematical simulation. Based on the understanding of the characteristic of the system. This thesis is focus on the indoor parts (EEV and evaporate) of the VRV system. The main work is as followed:1. The performance of two-evaporator VRV air conditioner is very complex because of the interaction of respective evaporators. A distributed-parameter model based on two-phase flow theory in two-evaporator VRV air conditioner is established in this paper. This model is a powerful tool for the studying of VRV system.2. Through the analysis of the indoor part of VRV, We can draw the conclusion that compare with the tradition conditioner, VRV has the advantage of effectiveness and comfortably.3. Based on the model, simulation is conducted to study the laws of the VRV system by varying its working parameter such as speed of compressor, openness of EEV, air volume of indoor units and indoor room temperature. Simulation results are also discussed and explained. And the conclusion drawn provides guidelines for the designing of control system for VRV.