EXPERIMENTAL STUDY AND SIMULATION ON THE DEGREE OF SUPERCOOLING WITH DIFFERENT REFRIGERANT PIPE LENGTH

摘要

Experiments have been carried out to study the variation of the degree of supercooling with the increase of refrigerant pipe length in variable refrigerant volume(VRV) system. At the same time, according to the change of refrigerant pressure drop, under the standard operating condition of air conditioning units, the variation of the degree of supercooling has been simulated in three different VRV air conditioning systems in which the refrigerant R410A is used. In addition, the maximal refrigerant pipe length of the three VRV air conditioning systems has been also obtained. On the other hand, the influence of the interior regenerative cycle on the degree of supercooling is discussed. For interior regenerative cycle system, its refrigerating effect and energy efficiency ratio (EER) are contrasted with common refrigerant system.