Abstract
This paper from the US Army Corps of Engineers’ Construction Engineering Research Laboratory (CERL) reports on the measured performance of pneumatic controls used for heating and air conditioning, giving the advantages and drawbacks of pneumatic, electronic and digital control. Simulating the effect of different control strategies on energy comsumption reveals greater variations than normally assumed. The report finally recommends the use of high quality electronic controllers coupled through transducers to pneumatic valve and damper actuators. For this, CERL has devised a reliable control panel which gives quick diagnosis of performance; it can be retrofitted as part of a simple control for variable air volume systems.
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