Pumping Liquid Refrigerant- what will work?

[TonyViet]

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[den052]

Vane pumps can work at hydraulic pressures up to at least 3000psi that I know of. A power steering pump on a car is usually a vane pump. I used to test those at 3000psi, as the PS system pressure range is 500-3000psi.

[den052]

Also don't know why a gear pump wouldn't do unless there is not enough lubrication in the 134A refrigerant. Are you pumping pure 134A, or mixed with oil?

[Aurel STDL]

This is proposal organic rankine cycle with R134a as working fluid.The overlal efficiency is mostly affected by the pump efficiency. There is no available high efficient pump on the market to pump 0,01ml/h of R134a at pressure difference 9.55 bar.
I would apreciate any suggestion regarding the pump with higher efficiency ratio at this scale.
Microgenerationconcepts

[Aurel STDL]

Small correction regarding pump performance. It should pump 0.01m³/h.

[bfrauenheim]

Check out SERO Side Channel pumps. They offer flow rates and heads in the range that you require.

[Aurel STDL]

Check out SERO Side Channel pumps. They offer flow rates and heads in the range that you require.

Thanks for your recomendation, but they have to big flow rate.
I am looking for a pump with 0,01 m3/h and to be able to reach 9,55bar pressure difference.

[shooter]

10 liters /hour is very small, what is aplication?
use small piston pump, when speed is reduced even gascompressor can be used.

[Aurel STDL]

10 liters /hour is very small, what is aplication?
use small piston pump, when speed is reduced even gascompressor can be used.

I have used a solenoid pump. It works on same principle as a piston, but with solenoid instead of motor. The disadvantage is its very low efficiency.
Here is a description of the application.
http://www.microgenerationconcepts.c...-cycle-concept

[zeotrope]

Hi,

getting such a pump is not so difficult, price is quite high ... try

speck pumps www.speck-pumps.com
sihi Halberg pumps www.sterlingsihi.com
lederle hermetic www.hermetic-pumpen.com

they all have pumps for 4m³/h 10 bars ... but there are no cheap pumps for this purpose ...
I used their pumps for commercial refrigeration with R134a

greetings from Germany

[thel33tone]

Greetings from USA, i have successfully created a sustainable liquid refrigerant pumping system that incorporates a sealed pump design. It is currently in use in a medium sized refrigeration system, in cool weather it saves an incredible amount of electric near 30% according to the amp-meter. It incorporates liquid injection pre-condensor, and a plc controlled pump combined modulated via pressure differential sensor data. It allows the head pressures to run near 70psig with NO flash gas present. If anyone serious is interested in partnering with me contact me and i will show you what progress has been accomplished. Not to sound bigheaded but for purpose of explanation I have basically done what Hysave could not do in a cost effective more applicable way.