logoxgvb
Joined: 30 Aug 2010
Posts: 1580
Read: 0 topics
Warns: 0/5
Location: hdfttv
|
 Posted: Tue 8:22, 14 Dec 2010 Post subject: ugg boots billig Piston temperature conditions in |
|
|
Refrigeration compressor piston temperature conditions Experimental study of alternative refrigerant
Condensate temperature changes tk tk / ℃ evaporating temperature Figure 14 for a 10 ~ C b = time. COP changes with the condensing temperature tk ● \35251.50.53020100-◆ a R22-R404A one. One by one ... J-~ one thousand one hundred and eleven J35404550tk / 'C Figure l5 evaporation temperature to = a 5. COP changes with the condensing temperature tk 303545J3525} 5 ~ a 306040-200 -. - 'R22-R404A-L --- A ... A. ... - 404550t / ℃ evaporating temperature Figure 16 l0: a 20 ~ C, the cooling capacity Qo change with the condensing temperature tk 55 - they enjoy a R404A ・ one by one ---- a L - ~ ... I -. One by one - L a ----. . . -. J3540455055tk / ℃ evaporating temperature Figure 17 l0 = a 10 ~ C, the cooling capacity Qo tk with the condensing temperature changes - ◆-R22-cocoon of a R404A303540455055t / ℃ Figure I8 evaporation temperature to = a 5 ~ C time. Cooling capacity Qo change with the condensing temperature tk 1,197,151,[link widoczny dla zalogowanych],, 39; -. - R22 A, ● BU R404A303540455055td ℃ 2O evaporation temperature of a 15-10-525201030 Figure 19 to: when a 2o. Input power P changes with the condensing temperature tk L35 - ● a R22-R404A40tl / ℃ 45-50 Figure 2o evaporation temperature 10 ~ C to = a time. Input power P changes with the condensing temperature tk j55303540455055tk / ℃ evaporating temperature Figure 21,[link widoczny dla zalogowanych], to = a 5 ~ C time. Input power P with the condensing temperature changes on the same tk compressor, the evaporation temperature to = a 20 ℃, the condensing temperature tk = 40.5 ~ C operating conditions, by adjusting the undercooling Atg at 10 ℃, 20 ℃, 30 ℃, the observed changes in key performance indicators. The results shown in Figure 22 ~ 24. Figure know, with the increase of undercooling, the input power P is almost unchanged, R404A growth rate of the cooling capacity than R22, so R22 R404A relative to the terms of the COP has also been significantly improved. Therefore, in the alternative as R404A R22 compressor, if the increase will be significantly improved undercooling COP. 25 A giant of a) l / oa \. C (} P undercooling △ IE with the changes - ◆ _.R22 + R404A1O2O30 △ tE / 'c Figure 23 = a 20 ℃. Tk = 40.5 ~ C,[link widoczny dla zalogowanych], the cooling capacity Q0 changes with undercooling 40010203040 △ t_ / ℃ Figure 24 = a 200C. tk = 40.5 ℃, the input power P changes in marrow of a supercooling of 26 one-three, the conclusion in the temperature conditions, the piston type refrigeration compressor using R404A R22 will have alternative COP lower condensing temperature and high cooling capacity to reduce the problem, but refrigeration system by increasing the undercooling way to increase the cooling capacity of R404A, which make up the COP refrigerant alternative to reduce the problems generated. Meanwhile, R404A substitution R22 will reduce the compression ratio, thereby reducing exhaust temperature, which for the compressor and long-term reliable operation of refrigeration systems is very useful. In summary, in the temperature conditions, piston compressor used as an alternative refrigerant R404A, in terms of the current level of technology is appropriate and feasible. I million cubic reference wave, according to Jiang. R404a.HCFC22 condensing units with the R502 in the comparative experimental study in [J]. CFC dynamic .2 Dong Xiaojun, Hao Liang, Jie Kan , Yun-Guang Chen,[link widoczny dla zalogowanych], Xiu-Ling Yuan. dual-evaporator refrigerator cars Simulation of the R404A system applications [J]. Xi'an Jiaotong University, 2OO6,[link widoczny dla zalogowanych], 4o (I) :67-71 .3 spring and dry. R404A freezer in my company's use of [J]. Temperature Physics, 2001, t9 (5) .4 Genghui Bin translation. R22 marine refrigeration equipment replacement problem [J]. Refrigeration. Since (MarineEngine ~ rsRevies) 1999, (2) .5 Well Tianfang Fu, Cold mechanical machines for the new refrigerant Forum l: busy with matters of a )-(-, 20o6 ,6:6-8. r ● ● .... r.3210, J
相关的主题文章：
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
The post has been approved 0 times
|
|
