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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 R12 (LBP)
Capillary tube length (m)
QASH M Capillary tube internal diameter (mm) & Evaporating temperature (°C)
0,6 0,7 0,8 0,9 1 1,2 1,5
kcal/h kg/h -30 -23,3 -30 -23,3 -30 -23,3 -30 -23,3 -30 -23,3 -30 -23,3 -30 -23,3
551,62,983,12            
601,72,502,62            
651,92,132,23            
702,01,831,92            
752,21,591,67            
802,31,401,463,203,35          
852,51,241,302,842,97          
902,61,101,152,532,65          
952,80,991,042,272,38          
1002,9  2,052,14          
1103,2  1,701,773,493,65        
1203,5  1,431,492,933,07        
1303,8  1,221,272,492,61        
1404,1  1,051,102,142,254,134,27      
1504,3    1,871,963,583,71      
1604,6    1,641,723,133,25      
1704,9    1,451,532,762,87      
1805,2    1,291,362,452,564,364,57    
1905,5    1,161,222,192,293,904,09    
2005,8    1,041,101,972,063,513,68    
2256,5      1,541,622,752,88    
2507,2      1,241,312,212,32    
2758,0      1,021,081,821,914,975,22  
3008,7        1,521,594,154,35  
3259,4        1,291,353,513,68  
35010,1        1,111,163,013,15  
37510,9          2,612,73  
40011,6          2,282,39  
45013,0          1,781,87  
50014,5          1,431,504,935,20
55015,9          1,171,234,034,26
60017,4            3,363,55
65018,8            2,843,00
70020,3            2,432,57
75021,7            2,112,22
80023,2            1,841,94
85024,6            1,621,71
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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