R404A制冷系统结霜工况与无霜工况下对比实验研究.pdf

制冷技术 Cryo. Supercond. 37 1 R efrigeration Vol. 37 No. 1 R404A 顾永明, 臧润清, 李星 ( , 300134) : R404A, , , : R404A; ; ; C om par ison of exper im en tal research of R404A refrigerating sy stem und er frosting cond itions and non- fros ting cond ition Gu Yongm ing, , Zang Runq ing, , Li X ing ( T ianjin Un iversity of Comm erce, T ianjin 300134, China) A bstrac t: An expermi en tal study ami s to evaluate both characteristics and perform ance ofR404A refrigerating system under frosting cond itions and non- frosting conditions. Suction pressure, d ischarging pressure, suction temperature, d ischarging tem perature, the temperature of evaporators and condensers p ipe, cooling capacity, com pressor pow er, frost th icknesswas tested un der test operations. They w ere analyzed and compared, at the sam e tmi e, som e related chartsw ere listed. K eyw ord s: R404A, Frosting conditions, Therm al perform ance, Expermi ental research. , , , 1 , , [ 3] , CFC()HCFC() , R404A , , , 2 ( ODS) , CFCHCFC [ 1] , , , R502R22 , , CFC, : R404A Q =K (T - T ) + E + E + E c 4 3 h a v , R502 : T3 ( ! ), T4 , R502A ( ! ), Eh