ABSTRACT
The small cold storage using gravity for liquid cooling is an efficient refrigeration system. In this paper, the computer simulation technology is used to optimize the evaporator.
2 THEORETICAL ANALYSIS AND SIMULATION CALCULATION
2.1 Mathematical mode
As a result of the two-phase flow heat transfer calculation is relatively complex, in order to simplify the calculation, the mathematical model of recycling evaporator is the following basic assumptions:
1. The refrigerant in the tube and the air outside the tube is one-dimensional, steady-state flow;
2. The air state parameters of the evaporator inlet are uniformly distributed;
3. Neglect the axial heat transfer, heat transfer only in diameter direction;
4. The flow velocity of the refrigerant is same in each channel, and it is the average flow velocity.
