Is there a better way of measuring energy efficiency in paper drying?Written by Admin-tech
Yes, there is. Rather than measuring the amount of steam that you use, measure the amount of steam that you lose. The steam consumption (amount of steam used per hour) is, by itself, an inadequate measure. A high value could be the result of either drying a lot of paper or venting a lot of steam. One is good. The other is bad. Indexing the amount of steam used with amount of water evaporated (pounds of steam per hour per pound of water evaporated) is a better metric, but significant amount of energy can easily be lost in the "noise" of this metric.
A better approach is to simply look for the steam losses. Specifically, look for steam that is vented to the atmosphere or vented to condenser tanks. Look for condensate that is dumped to a sewer and look for hot air that is exhausted from the dryer hood to the atmosphere. These are direct measurements of energy losses and they are direct indications of potential areas for energy recovery.