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cylinder coil pipes upside down

  • 06-08-2015 8:02pm
    #1
    corkgsxr
    Registered Users, Registered Users 2 Posts: 3,404 ✭✭✭


    How much difference to heating time does it make if the flow was going in the bottom and return out top of the coil.


Comments

  • #2
    Dtp1979
    Registered Users, Registered Users 2 Posts: 12,870 ✭✭✭✭Dtp1979


    corkgsxr wrote: »
    How much difference to heating time does it make if the flow was going in the bottom and return out top of the coil.

    If the balance valve is opened up as much as you can get away with then I'd say there's little difference.


  • #3
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    corkgsxr wrote: »
    How much difference to heating time does it make if the flow was going in the bottom and return out top of the coil.

    I'd expected the time to be the same but I'd expect the stored water to be less useful during reheat.


  • #4
    Calahonda52
    Registered Users, Registered Users 2 Posts: 12,881 ✭✭✭✭Calahonda52


    For a gravity fed system it matters a lot because it won't actually work.
    For a pumped system it also matters as the physics points toward the colder water at the top of the coil extracting heat from the hot water that rises up from below as it is heated so it is sort of self defeating, especially if its a coil that extends along way up the cylinder.

    I would get it switched:cool:

    “I can’t pay my staff or mortgage with instagram likes”.



  • #5
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    Calahonda52 wrote: »
    For a gravity fed system it matters a lot because it won't actually work.
    For a pumped system it also matters as the physics points toward the colder water at the top of the coil extracting heat from the hot water that rises up from below as it is heated so it is sort of self defeating, especially if its a coil that extends along way up the cylinder.

    I would get it switched:cool:

    I never saw it as a real problem(but that doesn't mean it can't be), you still get the transfer of heat energy, stratification is exaggerated so it may take longer to pull a bit of useful hot water off at the tap as opposed to a cylinder that heats from the top down where the top layer of hot water is usable quite quickly.

    The only time I've found any problem with heat transfer impacting on reheat time is when cylinders are placed on their sides allowing the return to rob heat from the cylinder after its 3/4 hot as soon to be president Donald Trump will find out when he sticks his head in the loft of the apartments in his new Golf course he just bought.


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