Table 3: Options for reducing tube passes Tube passes Retrofit options Actions required One None None Remove all the partitions; Reduce the number Replace the existing heads with two new Two of tube passes to one heads; Rearrange or repipe the if necessary Remove all the partitions; Replace the existing heads with two new Reduce the number heads; of tube passes to two Install a new partition in the middle of the front head; Four or Rearrange or repipe the if necessary Eight Remove all the partitions; Reduce the number Replace the existing heads with two new of tube passes to one heads; Rearrange or repipe the flows if necessary Reduce the number Remove all partitions except the middle one of tube passes to two in the front head Remove all the partitions; Six or Ten Reduce the number Replace the existing heads with two new of tube passes to one heads; Rearrange or repipe the flows if necessary Reduce the number Remove some partitions and retain those in Twelve of tube passes to four the typical 4-tube-pass layout
Table 3: Options for reducing tube passes Tube passes Retrofit options Actions required One None None Two Reduce the number of tube passes to one Remove all the partitions; Replace the existing heads with two new heads; Rearrange or repipe the if necessary Four or Eight Reduce the number of tube passes to two Remove all the partitions; Replace the existing heads with two new heads; Install a new partition in the middle of the front head; Rearrange or repipe the if necessary Reduce the number of tube passes to one Remove all the partitions; Replace the existing heads with two new heads; Rearrange or repipe the flows if necessary Six or Ten Reduce the number of tube passes to two Remove all partitions except the middle one in the front head Reduce the number of tube passes to one Remove all the partitions; Replace the existing heads with two new heads; Rearrange or repipe the flows if necessary Twelve Reduce the number of tube passes to four Remove some partitions and retain those in the typical 4-tube-pass layout
Paper_3_Pressure_drop.docx