From olcese@ge.infn.it Mon Mar 21 10:08:16 2005 Date: Mon, 21 Mar 2005 10:00:36 +0100 From: Marco Olcese To: Richard Bates Subject: Re: mass flow increase for EC HEX [ Part 1, Text/PLAIN 75 lines. ] [ Unable to print this part. ] Hi Richard, thanks for your reply. Could you please perform these measurements while testing the reference capillaries? Thanks Regards Marco Richard Bates wrote: Hello Marco, As measured for the cern prototype 3 capillaries 0deg -45deg +45deg massflow at 100% power 35C 5.7 5.5 5.42 massflow at 0% power 20C 5.74 5.46 n/a % change 0.70% -0.73% n/a massflow at 100% Danfoss 5.76 5.84 5.65 m at 0% 20C, Danfoss 5.99 5.881 n/a % change, Danfoss 3.99% 0.70% 2 capillaries 0deg -45deg +45deg massflow at 100% power 35C n/a n/a 4.39 massflow at 0% power 35C 4.39 massflow at 0% power 20C n/a % change 0.00% massflow at 100% Danfoss 4.48 m at 0% 35C, Danfoss 4.52 m at 0% 20C, Danfoss n/a % change, Danfoss 0.89% +45deg is with the vapour inlet end of the HEX is pointing down. -45deg is with the vapour inlet end of the HEX pointing upwards As you see there is a limited amount of data taken with only 2 capillaries The change in the temperature for the 0 and -45deg orientation is from approx -12C to -23C and this would appear to have only a slight change in the massflow. For the +45deg case the TlbCAP is higher at -6.5C and therefore we might expect a greater change in massflow. But the experiment was not preformed. this is something that shoudl be done. but you will see that the massflow increases are all quite small. yours Richard On Thu, 17 Mar 2005, Marco Olcese wrote: Hello Richard, could you please remind me which has been the measured mass flow increase for the EC from 100% power 35 C to 0% power 20 C with the two orientations of the HEX and for both the three capillary and two capillary configurations? Thanks Regards Marco