2 replies to this topic

[andrade_mcg]

Hi guys, I do have equipment operating at 2kgf/cm2 and because of that I need to reduce the pressure from 21kgf/cm2 to 2kgf/cm2 through a control valve.

 

2 questions:

 

1- This pressure reduction makes me lose energy

2- If this equipment was tested in a high pressure like 21kgf/cm2, if I operate it at 6kgf/cm2 the heat transfer is more or less efficient?

 

Consider 2 scenarios:

 

1- The equipment is a heat exchanger

2- I will heat water tthroughdirect steam injection.

[Pilesar]

Energy is lost when the pressure of a flowing fluid is reduced by passing through a control valve. Heat transfer efficiency is affected by many parameters. Pressure is not a primary heat transfer parameter in itself, but it can affect other important parameters like velocity, surface tension, density, heat capacity, latent heat of vaporization, etc.

[shvet1]

1 - Why do you concern about energy losses?

2 - Heat exchanger exchanges heat. Why do you believe it reduces pressure?