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Energy savings

Johno12345
Hi


I'm looking at my factory for some avenues to save energy, and have certainly come across some projects that have saved thousands on energy, but with an obvious cost to implement. 


The obvious ones like LED lighting, timers etc are all done, so I have started thinking a bit further.


I have 11 charge air blowers, which are 11kW or 13kW, are all pretty old, and have been rewound several times. They cant be changed to variable speed, as the air volume needs to be constant, and need to remain individually controlled. As these things run all day and night, its a significant cost. 


I seem to be a bit sceptical when someone tips up at the door saying they have super energy saving motors, especially when they cant quantify their claims.


Has anyone come across something that gave tangible results on things like this? 


Another one is that someone said putting VSD on pumps and fans, even running them at 100% will give a good energy saving


Thanks, just having a ponder since its Friday
Parents
  • 0
    OMS:

    Well, I guess you can't fix stupid, can you - good luck, just don't underestimate the power of the hard of thinking when they get together  in groups


    Regards


    OMS


    definitely not...



    power factor is .96 - i have 2000kvar of correction


    the towers arent connected to chillers, its rather more basic than that. I have got the manufacturers running some figures for me I think one tower uses 90kW so some room to work on there. From what I can gather, the fan speed can be varied depending on the water temperature, and, indeed, they were designed back in the 80s to be able to operate on natural draught, but that facility has been lost during plant reconfiguring.One thing that I notice is that they click on for about a minute and back off when it really ought to be sitting idle, that might be an easy fix to save some energy with quick hysteresis change but I dont know if its really a significant energy saving. 



    the temperatures of the process eqpt is all logged but its basically down to how fast we can cool it back down again, rather than maintaining any sort of fine temperature range, but metering is definitely a start, with the other variables



     


Reply
  • 0
    OMS:

    Well, I guess you can't fix stupid, can you - good luck, just don't underestimate the power of the hard of thinking when they get together  in groups


    Regards


    OMS


    definitely not...



    power factor is .96 - i have 2000kvar of correction


    the towers arent connected to chillers, its rather more basic than that. I have got the manufacturers running some figures for me I think one tower uses 90kW so some room to work on there. From what I can gather, the fan speed can be varied depending on the water temperature, and, indeed, they were designed back in the 80s to be able to operate on natural draught, but that facility has been lost during plant reconfiguring.One thing that I notice is that they click on for about a minute and back off when it really ought to be sitting idle, that might be an easy fix to save some energy with quick hysteresis change but I dont know if its really a significant energy saving. 



    the temperatures of the process eqpt is all logged but its basically down to how fast we can cool it back down again, rather than maintaining any sort of fine temperature range, but metering is definitely a start, with the other variables



     


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