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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 R22 (HMBP)
Capillary tube length (m)
QASH M Capillary tube internal diameter (mm) & Evaporating temperature (°C)
0,70,80,911,21,5
kcal/hkg/h-57,2-57,2-57,2-57,2-57,2-57,2
1002,23            
1202,674,544,68          
1302,903,904,02          
1403,123,363,47          
1503,342,923,03          
1603,572,592,68          
1703,792,292,374,674,82        
1804,012,042,114,164,30        
1904,241,831,893,733,88        
2004,461,661,723,403,52        
2154,791,431,492,943,04        
2305,131,251,302,562,654,794,95      
2455,461,091,142,262,354,264,41      
2605,80 1,012,012,093,793,92      
2756,13  1,801,873,383,50      
3006,69  1,501,562,832,945,00     
3207,13  1,311,372,502,604,404,55    
3407,58  1,161,222,212,303,894,02    
3608,02  1,041,091,972,053,463,58    
3808,47    1,761,833,123,24    
4008,92    1,581,652,822,93    
45010,03    1,251,312,222,31    
50011,15     1,051,781,864,764,93  
55012,26      1,471,543,964,11  
60013,37      1,231,293,323,45  
65014,49      1,031,092,822,93  
70015,60        2,412,52  
75016,72        2,092,18  
80017,83        1,841,93  
85018,95        1,631,71  
90020,06        1,441,524,87 
95021,18        1,281,354,364,53
100022,29        1,151,213,924,07
110024,52          3,213,35
120026,75          2,712,84
130028,98          2,302,41
140031,21          1,962,06
150033,44          1,691,78
160035,67          1,461,55
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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