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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 R134a (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
751,692,812,96            
801,802,472,60            
851,912,182,31            
902,031,952,06            
952,141,751,85            
1002,251,581,67            
1052,361,431,523,303,48          
1102,481,301,383,003,17          
1152,591,191,262,742,90          
1202,701,101,162,522,66          
1252,821,011,072,322,45          
1302,93  2,142,26          
1403,15  1,851,953,824,04        
1503,38  1,611,703,323,51        
1603,60  1,411,492,913,08        
1703,83  1,251,322,582,72        
1804,05  1,111,172,292,42        
1904,28    2,062,173,904,12      
2004,50    1,851,953,523,71      
2104,73    1,681,773,183,36      
2204,95    1,531,612,903,06      
2305,18    1,391,472,652,79      
2405,41    1,281,352,432,564,294,56    
2505,63     1,242,232,363,944,19    
2756,19      1,841,943,253,45    
3006,76      1,541,632,722,89    
3257,32       1,382,312,45    
3507,88       1,191,982,10    
3758,45       1,031,721,83    
4009,01         1,604,114,34  
4259,57         1,413,633,83  
45010,14         1,263,223,40  
47510,70         1,132,883,04  
50011,26         1,012,592,73  
52511,82          2,342,47  
55012,39          2,132,24  
57512,95          1,942,05  
60013,51          1,781,87  
65014,64           1,59  
70015,77           1,364,384,61
75016,89           1,183,794,00
80018,02           1,033,303,49
85019,14            2,913,07
90020,27            2,582,72
95021,40            2,302,42
100022,52            2,062,18
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..
 
 
 
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