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Recommendations for the determination of capillary tube size
Table considers condensing temperature Tc = 45 °C and heat exchanger in capillary..
Increase length 2% per each K of increase of condensing temperature..
TABLE FOR REFRIGERANT R22 (LBP)
Capillary tube length (m)
QASH M Capillary tube internal diameter (mm) & Evaporating temperature (°C)
0,60,70,80,911,21,5
kcal/hkg/h-30-23,3-30-23,3-30-23,3-30-23,3-30-23,3-30-23,3-30-23,3
1002,162,632,76            
1202,591,811,90            
1302,801,541,62            
1403,021,331,393,063,20          
1503,231,151,212,662,79          
1603,451,011,062,332,45          
1703,66  2,072,17          
1803,88  1,841,93          
1904,10  1,651,733,423,58        
2004,31  1,491,563,083,23        
2154,64  1,291,352,652,78        
2304,96  1,121,182,312,42        
2455,28  0,991,042,032,13        
2605,61    1,801,893,423,59      
2755,93    1,601,683,053,20      
3006,47    1,341,412,552,68      
3206,90    1,171,232,232,35      
3407,33    1,041,091,972,073,533,70    
3607,76      1,751,843,133,29    
3808,19      1,571,652,802,94    
4008,62      1,411,482,522,64    
4509,70      1,111,171,972,07    
50010,78        1,581,66    
55011,86        1,301,363,563,74  
60012,94        1,081,142,963,11  
65014,01        0,920,962,502,63  
70015,09          2,142,25  
75016,17          1,851,95  
80017,25          1,621,70  
85018,32          1,421,50  
90019,40          1,261,33  
95020,48          1,131,18  
100021,56          1,011,063,583,68
110023,71            2,973,01
120025,87            2,512,50
130028,03            2,142,11
140030,18            1,851,80
150032,34            1,621,56
160034,49            1,431,36
QASH is the cooling capacity under ASHRAE (LBP) condition corresponding to the indicated mass flow rate M (liquid subcooled down to 32 °C, return gas superheated up to 32 °C)..
The relationship between length and diameter is, approximately: (L / L0) = (D / D0)5,4..
NOTE: R22 is not recommended for LBP use..
 
 
 
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