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Recommendations for the determination of capillary tube size
Table considers condensing temperature Tc = 45 °C. Non adiabatic flow in capillary..
Increase length 2% per each K of increase of condensing temperature..
TABLE FOR REFRIGERANT R12 (HMBP)
Capillary tube length (m)
QASH M Capillary tube internal diameter (mm) & Evaporating temperature (°C)
0,70,80,911,21,51,7
kcal/hkg/h-57,2-57,2-57,2-57,2-57,2-57,2-57,2
702,094,614,87            
752,244,054,26            
802,383,573,77            
852,533,183,35            
902,682,842,99            
952,832,562,70            
1002,982,312,444,684,93          
1103,281,902,023,894,09          
1203,581,611,703,293,47          
1303,871,361,452,802,96          
1404,171,181,252,432,574,514,75        
1504,47  2,112,243,964,18        
1604,77  1,851,963,483,67        
1705,07  1,641,743,093,27        
1805,37  1,471,562,772,924,84       
1905,66  1,311,392,482,624,344,58      
2005,96  1,181,252,232,363,914,12      
2256,71    1,771,883,113,29      
2507,45    1,421,512,512,65      
2758,20    1,171,252,082,21      
3008,94      1,741,854,654,91    
3259,69      1,471,563,954,18    
35010,43      1,271,363,393,59    
37511,18      1,091,172,983,16    
40011,92        2,612,77    
42512,67        2,302,44    
45013,41        2,042,17    
47514,16        1,831,96    
50014,90        1,651,77    
55016,39        1,341,454,574,84  
60017,88        1,111,203,824,05  
65019,37          3,233,44  
70020,86          2,792,98  
75022,35          2,432,594,765,05
80023,85          2,112,264,164,42
85025,34          1,851,993,703,94
90026,83          1,641,763,303,52
95028,32          1,451,572,953,15
100029,81          1,291,412,642,83
QASH is the cooling capacity under ASHRAE (HMBP) condition corresponding to the indicated mass flow rate M (liquid subcooled 9K, return gas superheated up to 35 °C)..
The relationship between length and diameter is, approximately: (L / L0) = (D / D0)5,4..
 
 
 
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