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Thanks everyone for your responses. 25362, to better define the cooling process would it be OK to assume constant enthalpy -- kind of like what is done for a throttling process problem where going from states 1 to 2 you move down and to the right on a temperature-entropy diagram?

OK -- I am good at conceiving engineering problems -- but not always good at solving them. If I have refrigerant (R22) at saturated vapor state in a fixed volume (rigid-walled tubing) which is closed tight and not open to atmospheric pressure and cool the tubing -- what happens to the...

Does anyone know of any standards organization or other resource that publishes guidelines for removing calcium carbonate and calcium magnesium carbonate deposits from the insides of heat exchangers?

This is probably on another thread somewhere, but I could not readily find the discussion I was looking for with this site's search feature. Any thoughts on using a relief valve for maintaining minimum pump flow? I am thinking of using a straight spring or pilot operated relief valve -- not an...

Thanks for the responses. I followed up with the vena contracta idea and figure with 2" suction pipe and a flow of 118 GPM, it could be 8.6 feet before flow leaving the tank is fully developed -- in this contracted region (with 10' of water in the tank) if the flow diameter contracts to...

I have a flow problem involving a vented site glass on the suction side of a pump. The system consists of a 10,000 gallon vented AST piped into a distribution pump with 2" bcs pipe. I tee'd into this pump intake line with a piece of clear PVC thinking this measures the static pressure of...