vessel size calculation

[hardy surya]

hello guys,

i need some information about vessel calculation like accumulator, intercooler and receiver (high pressure). i have read ashrae refrigeration handbook but i get no much information about that. pls could you give me the advise information? thanks

[US Iceman]

Well, you gave a list of three vessels each of which is sized using slightly different methods.

A high-pressure receiver is simply sized on volume. How much storage volume do you need to store at anytime? Determine the volume you want to store and add 20%-30%. The new volume is what you use to select the reciever volume.

The other two vessels are liquid separators. They separate liquid form a vapor stream. In this case you need to determine what the maximum separating velocity is for a given operating pressure. This data is included in the ASHRAE refrigeration manual.

If you take the total connected compressor volume flow (CFM or cubic meters/sec) for the specific cooling load, then divide the volume flow of the compressors by the maximum separating velocity. This gives you the cross sectional area of the separator.

Now you have to decide how much liquid you want the vessel to hold (this called surge volume). This volume divided by the vessel area tells you how much height is needed in that vessel diameter. Now add the separation distance to this height (from the surge volume).

After you make some allowances you have the overall height of the vessel. All of this is described in the refrigeration manual. What I described above is a very breif example.