ROTOR TURNDOWN SENSOR AND CONTROL APPARATUS

摘要

This rotary regenerative heat exchange appartus alternatively exposes a rotor of heat absorbent material to a heating fluid and to a fluid to be heated. The rotor is surrounded by a housing, which has a sector plate at opposite ends that are adapted to separate the heating fluid from the fluid to be heated. The apparatus is provided with control methods that intermittently drive a sector plate into a sealing relationship with the adjacent edge of the rotor, after which a predetermined reference point on the rotor activates a sensor to move the sector plate away from the rotor to permit freedom of movement therebetween.