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Topic Title: Overheating in substations Topic Summary: Substations Created On: 15 July 2012 07:23 AM Status: Post and Reply |
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 15 July 2012 07:23 AM
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Hi all,
Our site currently as several substations that over heat. We are going to cool the substations down using some kind of method, but wondered what other personal had come across. Bearing in mind our substations are in a dusty environment, so drawing cold air from the outside is a no go. Thanks in advance, ------------------------- Fail to prepare...Prepare to fail! Adam |
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15 July 2012 02:45 PM
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If you cannot use forced ventilation of air from outside, then about the only option you have is a heat pump arrangement to transfer the heat to the outside.
Regards, Alan. |
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15 July 2012 08:31 PM
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Have you checked what controls are fitted to the switchroom heaters, panel heaters, anti-condensation heaters etc - it might be possible to remove some of the heat at source.
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15 July 2012 08:40 PM
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Closed circuit water cooling, as in cooling generators? Air/water head exchangers on the inside and fin-fan coolers on the outside.
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16 July 2012 11:42 PM
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Hi Adam,
Firsty, you may want to consider moving this to the wiring regs or energy forum where you may get a better response. For my experience, in dusty environments I have seen a positive air pressure system installed in switchrooms that maintains a slightly higher pressure in the switchroom to help keep dust ingress to a minimum. I have then seen these supplemented with a circulating air conditioning system to cool the air within the switchroom. The other factor to look at is to reduce the heat at source if possible such as deloading or increasing power factor if applicable. Kind regards Donald Lane. |
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20 July 2012 03:33 PM
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If you cannot use forced ventilation of air from outside, then about the only option you have is a heat pump arrangement to transfer the heat to the outside. Regards, Alan. Hi Alan, We are currently using this method on one of our more hotter substations and all though it cools the sub down, its still quite hot. Thanks ------------------------- Fail to prepare...Prepare to fail! Adam |
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20 July 2012 03:35 PM
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Closed circuit water cooling, as in cooling generators? Air/water head exchangers on the inside and fin-fan coolers on the outside. This seems to be quite a good idea, have you personally experienced this in any substations youve been in? Thanks ------------------------- Fail to prepare...Prepare to fail! Adam |
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23 July 2012 02:36 PM
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It's undersized then !! - and I guess you need to contrast "quite hot" with a particular operating temperature (and hence load) I've used heat recovery heat pumps in parallel and triple arrangements (for redundancy) and they work fine - just be aware you are consuming about the same amount of energy in the heat pump as the combined transformer iron and copper losses. I've also used ONW and OFW coolers on transformers where they had to be in enclosed bunkers (not UK) - no reported problems after 2 - 3 years in Regards OMS ------------------------- Failure is always an option |
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Overheating in substations
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