Advice on humidity/saving electricity

Discussion in 'General Discussions and Advice' started by Riaanv, 7 Aug 2014.

  1. Riaanv

    Riaanv

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    My electricity bill is in excess of R4k a month for a 3 person household, the only special thing is the fish tank.

    I have a fish room which is insulated - total water volume is approximately 3000 litres. Problem is when I close the doors it gets really humid inside and with the electricity connections not 100% water proof it is not ideal. Even if the electricity is sorted the entire place has condensation.

    Was thinking about installing a dehumidifier to keep the humidity down so that I can close the door and keep the heat in and also to cover the water surfaces of the tanks with foamalite to avoid excessive evaporation.

    My understanding is that a dehumidifier wont take heat from the insulated room because when the water condensate from the air it creates heat. Is this correct?

    The dehumidifier will use electricity but can kick in at preset humidity, will the electricity use be less than what I would save overall on heating?

    The overall thinking is that if I limit evaporation and close the doors to the insulated room I will lose less heat and as a result use less electricity. Would this work in theory?

    Any other ideas would also be appreciated.
     
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  3. dallasg

    dallasg Moderator MASA Contributor

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    how many heaters and what watts are they?

    what is your total consumption?
    have you tried installing a electricity monitor?
     
  4. Riaanv

    Riaanv Thread Starter

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    No have not monitored anything yet but I have 6 x 300W heaters on a reef angel and during the night time all three plug points are on (two per point), so that would be approx. 1800W running for large parts of the night.

    Not 100% sure what the total consumption is but the heating must be the main consumer. Lights are 54w T5 10 tubes on for (12 hours 6 tubes /8 hours 10 tubes) will be second, then scrubber lights 24/7 and pumps and skimmer, but the latter are low watt consumers

    Good point, should probably first see how much the heaters are actually using before trying to fix the problem.
     
  5. Meg G

    Meg G

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    that is not so much. R4000 gives you 3333kwh that is 110kwh a day, say you got 2000watt geyser element is 2kwh for every hour. a ketel 1500kwh stove 4000kwh per element. so work out your watts per hour for a 1000 watts use per hour one unit cost about R1.20
     
  6. Meg G

    Meg G

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    you get a unit from builders that mesure consumption and will give you a prediction on what ever you use. will put a foto just need to take it off my ups on tank.
     
  7. Meg G

    Meg G

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  8. Riaanv

    Riaanv Thread Starter

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    Thanks for the info. Will look into getting one of those units to see how much is actually consumed. Will also check the difference with the doors open and the doors closed.
     
  9. dallasg

    dallasg Moderator MASA Contributor

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    those are my units :) Efergy :)
     
  10. dallasg

    dallasg Moderator MASA Contributor

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    @Riaanv there is another solution for large tanks

    you can use gas to heat the water, a 6l/m gas geyser is R1050, you buy a titanium coil, R600, and make a simple heat exchanger and wham all done.

    place the exchanger in your sump and recirc a closed loop of glycol attached to a small pump so you heat the glycol and transfer the heat... all you control is the recirc pump as the geysers all have flow switches, works well and no tank contanimation
     
    Last edited by a moderator: 26 Nov 2015
  11. Meg G

    Meg G

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    are you using heat cables in the floor. my top up water is in the fish house. so it gets warm up by a pump pumping it to the roof throw some black solar geyser so the sun heats it up. then it returns and i can pump it to any tank.
     
  12. Meg G

    Meg G

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    i use to use methane gas( from a chicken shit pit) the problem it use O2 to burn and my 02 levels went down. i change to propane. then i had some CHO problems so i went with the solar geyser and a normal electronic shut off valve on a thermostat.
     
    Last edited by a moderator: 26 Nov 2015
  13. dallasg

    dallasg Moderator MASA Contributor

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    i had the geyser in another room, as LP Gas burns safe it wasnt an issue
     
  14. mariusmeyer

    mariusmeyer

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    Good luck finding titanium coil. I had to get mine made in china about 2 months ago because i could not find any locally.
     
  15. 459b

    459b Moderator MASA Contributor

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    Why not add a extractor fan in the fish room? That should get rid of humidity and then to control costs of electricity/heating, get a what pump.
     
  16. dallasg

    dallasg Moderator MASA Contributor

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    there are 2-3 suppliers in jhb, i got from my engineering division
     
  17. mariusmeyer

    mariusmeyer

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    Damn. That will teach me for not asking you these type if questions.
     
  18. Meg G

    Meg G

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    damm ok, im looking for aqauray 2000 np ultimate led, mine went into the water on monday. and its.....
     
  19. Francois

    Francois

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    Guys I'm busy doing some researching on hooking up a 300-500w titanium heat pump to the tank? They use it to heat up swimming pools and jacuzzies. What is your point of view on this?
     
    Last edited: 8 Aug 2014
  20. dallasg

    dallasg Moderator MASA Contributor

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    i dont like the idea of tank water flowing through the pump as most units are oiled/greased, rather use a heat exchange method
     
  21. Riaanv

    Riaanv Thread Starter

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    I like the above idea. Also figured out that the end units for the month is coming in at R1.84 per unit so the saving on gas should be even more. Need to figure out what a heat exchange is - will google later
     
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