LDM Student

  • Member since Apr 29th 2017
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  • LDM

    Post
    (Quote from Bruce__H)


    What you call "Hard evidence" has on this forum and elsewhere been interpreted in many different ways. So That evidence seems not to be so hard as you suggest but is only hard for those people who have fixed their opinion. That I…
  • LDM

    Post
    (Quote from IH Fanboy)


    From the interview of Mats Lewan with Rossi :

    Rossi explained a couple of things with regard to the heat exchanger.
    1. A ‘circulator’ (positioned in connection to the heat exchanger) was used to stabilize the flow of steam
  • LDM

    Post
    (Quote from IH Fanboy)


    Since both the internal tank and the outside tank are much lower then the higher rows of Prominents, just gravity alone can not feed the Prominents.
    If we had just gravity, those higher Prominents would have had a negative inlet…
  • LDM

    Post
    (Quote from Alan Fletcher)


    If the tech answering your question does not know the answer he will probably contact another person within the organization who knows the answer.
    That might be a pump designer.
  • LDM

    Post
    (Quote from Alan Fletcher)


    Can you also ask them under which exact circumstances the pump can achieve several times the stated feed rate.



  • LDM

    Post
    (Quote from Alan Smith)


    Has to be paid for in electric energy to operate the pump.

    However I disagree about adding the negative column seize at the inlet with the column height at the outlet (But correct me if I am wrong)
    Why ? Because when the pump is…
  • LDM

    Post
    (Quote from Alan Fletcher)


    Alan,

    Since you are the owner of a Prominent pump you should have the right to contact the technical support and discuss the "confusions" you have with them

    Technical Support Tier 1
     
    Please call 412-787-2484 or email

  • LDM

    Post
    (Quote from Bruce__H)


    I am totally agreeing with you that on the picture you are referring to the external ports for controlling the stroke rate are not connected.
    Good point that you looked at the connectors on the picture, should have done that…
  • LDM

    Like (Post)
    Don't forget he had a pinball wizard / programmer on hand who could probably activate those flippers at speed.
  • LDM

    Post
    (Quote from Alan Fletcher)


    The question is under which circumstances it can be achieved. They are not providing additional details, but maybe the following applies.


    As I understand the maximum standard stroke rate programmed into the Prominent is 200.
  • LDM

    Replied to the thread The Playground.
    Post
    (Quote from Paradigmnoia)


    First a remark concerning your statement that the fins on the Lugano device contribute little to the overall cooling.


    The area of the central tube of the Ecat is 0.0125 square meter without fins.
    The area of the central tube…
  • LDM

    Post
    (Quote from Alan Fletcher)


    However, it delivers more at lower back pressure. There is a warning (hidden deep in the documentation where even expert witnesses can't find it) that at VERY (undefined) low back pressures the pump can deliver "several times"
  • LDM

    Post
    (Quote from Alan Fletcher)


    The advertisement says 1-10 bar.
    However Prominent list the HDV-S-DL as 0-10 Bar in their documentation, so maybe the advertisement states it wrong.


    see : https://www.prominent.com/en/P…s-low-pressure-pumps.html
  • LDM

    Post
    Alan,

    Can you use the DL instead of the DK
    I found a HDV-S-DL on ebay (uk).
    see : https://picclick.co.uk/Promine…-10-Bar-391839957283.html
  • LDM

    Post
    (Quote from Alan Fletcher)


    I am not sure.

    As earlier stated, I am NOT a pump expert.
    But my (maybe bad) reasoning says that the recirculation pump is pumping water through the Prominent at both sides (They are dual stroke, with dual diaphragms ?)
    Now if…
  • LDM

    Post

    If a recirculating pump was used in combination with the metering pump and the re-circulation pump is on the inlet side of the metering pump then it can provide enough pressure to open the inlet and outlet check valves in the metering pump.
    This would…
  • LDM

    Post
    (Quote from THHuxleynew)


    If I look closely at the diagrams of several Prominent pumps, then they are sometimes made up of three straight lines, with the slope rising from right to left.
    This indicates a somewhat non linear effect.
    Also for some…
  • LDM

    Post
    (Quote from Eric Walker)


    I didn't think that you where trying to assert that the pressure was .2 Bar
    The reason for bringing up the .1 bar was the same as yours, being a possible set-point parameter to be tested.
  • LDM

    Post
    (Quote from Eric Walker)

    Eric,

    You are right on the interview with Mats Lewan where indeed .2 Bar is stated

    However that contradicts his published notes about the Smith report in which he states that the average water column height was 1 meter, (or .1…
  • LDM

    Post
    (Quote from Paradigmnoia)


    From the remarks of Rossi in his comments the pressure was .1 Bar.
    Given .1 bar my guess is about 55 L/h.
    However Rossi stated that there was an additional effect of the re-circulation pump

    So if somebody is going to test the…