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5.2.6 Ventilation
The ventilation is a large energy consumer in this plant with a yearly consumption of 1 127
MWh. To be able to make any suggestions about energy saving measures in the ventilation
system, measurements of the indoor air has to be made to see if it is possible to decrease the
ventilation rate. This should be carried out by somebody with expertise within this area. For
example: if the ventilation in the workshop area could be decreased by 10%, the saved
electricity cost would be 78 900 SEK/year. A large concern with decreasing the ventilation is
the leakage of carbon monoxide from the furnaces. One possibility could be to adjust the
ventilation rate to the production rate, since the major function of the ventilation is to limit the
amount of furnace gases in the indoor air. This could be realised by installing gas meters to
control the amount of furnace gases in the indoor air.
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