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  1. 16-03-2003, 07:33 PM #1
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    Friobernal
    Friobernal is offline regular poster
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    Questions Ammonia evaporators

    Hi,

    Iīve got 3 questions about ammonia evaporators:

    1. Number of re-circulations. Iīve read is about 4 in flooded systems but... I need somebody explain it to me

    2. Top pump / bottom pump. The connections change, but ... I donīt know more. What / why top or bottom pump?

    3. Iīm attaching a drawing of an ammonia evaporator. I donīt understand the reason for circuits in vertical and not in diagonal. I mean in the last circuit (from the air inlet in the coil) the air temperature is lower than in the first one (on the left in the drawing) so, I think that ammonia will have more difficulties in evaporating (smaller DT). With collectors in vertical (as for R404A) and circuit in diagonal we would get less difficulties.... so why?

    Bye
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