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Hot water cylinder with built in heat pump

  • 01-09-2022 10:00am
    #1
    Mike2006
    Registered Users, Registered Users 2 Posts: 689 ✭✭✭


    Hi,

    I have been looking at the hot water cylinders (300L) with a built in heat pump as I think that they would suit my setup quite well.

    Basically, the heat pump takes the warm air from the hot press, compresses and converts this into electrical energy (water immersion heater) resulting in an 800W input equating to a ~3kW heating element.

    Does anybody here have experience of these?

    Thanks,

    Mike



Comments

  • #2
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,331 Mod ✭✭✭✭Wearb


    I dont know anything about them, but if it takes heat from inside the house (hotpress), then it defeats the purpose. This heat has to be generated from sonewhere...🤔

    Please follow site and charter rules. "Resistance is futile"



  • #3
    Sleeper12
    Registered Users, Registered Users 2 Posts: 17,176 ✭✭✭✭Sleeper12


    You would be far better off replacing the hot water cylinder with a fully insulated one and insulate the hot pipes. A modern "hot press" should not be any warmer inside than outside the hot press.



  • #4
    John.G
    Registered Users, Registered Users 2 Posts: 3,610 ✭✭✭John.G


    Lookup Ariston Nuous



  • #5
    bf
    Registered Users, Registered Users 2 Posts: 992 ✭✭✭bf


    I have something similar, an Atlantic hot water heat pump. I could be wrong but I don't think that will go in your existing hot press, unless you can vent it externally, so you will have to core through a wall provide an exhaust.

    So our machine is now in our utility room, rather that hot press to allow this.

    It is essentially a air to water heat pump for hot water only, works very well with my solar, and even without it costs about €1.50 in electricity from stone cold to 270 litres @ 62 degrees.



  • #6
    John.G
    Registered Users, Registered Users 2 Posts: 3,610 ✭✭✭John.G


    Any idea of the energy required in kwh to carry out the above?.



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  • #7
    10-10-20
    Registered Users, Registered Users 2 Posts: 7,792 ✭✭✭10-10-20


    That's the craziest thing....

    https://www.heiz24.de/mediafiles/pdf2/97_013_24--DBL-02-de.pdf

    So it can in effect be part of the exhaust flow from a HRV system. Pretty cool.



  • #8
    bf
    Registered Users, Registered Users 2 Posts: 992 ✭✭✭bf


    https://www.boards.ie/discussion/comment/119555894#Comment_119555894

    When my pump is running it's using about 0.7kwh of electricity



  • #9
    John.G
    Registered Users, Registered Users 2 Posts: 3,610 ✭✭✭John.G


    That figure is probably the compressor power in KW, it would take 13.2 kwh to heat 270 litres of water from a present 20C to 62C so I would expect the heat pump to run for - 4.5/5 hours and consume around 2.8 kwh.



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