|CARBON DIOXIDE SENSOR USAGE IN THE POWER CENTER FOR THE PERFORMING ARTS|
Carbon dioxide (CO2) sensors can be installed in areas that have infrequent or irregular occupancy patterns, such as auditoriums and classrooms. The sensors allow the ventilation system to be controlled by the concentration of CO2 present in the space, thereby reducing the amount of ventilation required during unoccupied times. As the space becomes occupied, the sensors will detect an increase of CO2 and adjust the amount of outside air needed. CO2 sensors, as well as other energy saving equipment, were installed in the Power Center for the Performing Arts on the University of Michigan's Ann Arbor Campus in 1994.
Overview of Procedure
The system is designed to work efficiently in large open spaces including auditoriums, classrooms, or conference rooms. Placement of sensor locations within a given space is critical for the system to work properly. If the sensors are not located correctly, fluctuations in temperature and overall comfort within the room may be observed.
In addition, errors in measurement and varying CO2 concentrations over time can cause low readings that may be misleading. Elevated CO2 may be due to various causes alone or in combination, such as: increased occupant population, poor air distribution, and poor air mixing. Smoke tubes and temperature profiles may help to clarify air circulation patterns.
& Health Precautions/Personal Protective Equipment
Periodic maintenance of the sensors is required to ensure that acceptable air quality is maintained.
The overall calculated energy savings, not directly related to the CO2 sensors, for the Power Center for the Performing Arts in fiscal years 1995 and 1996 were $29,000 and $32,000, respectively.