Air volume can be measured reliably with conventional electronic differential temperature techniques. Controlling the actual outside-air minimum volume independent of the variable supply fan delivery is necessary to meet minimum ventilation and positive building pressurization requirements. Simulated exhaust-fan flow signals can be added electronically and subtracted from return-fan and outdoor-air make-up volumes to balance the airflow requirements for buildings, maintaining a desired space static pressure. Energy can be saved by admitting only the required outside-air volume and by controlling the return-air volume for variable exhaust requirements, resulting in lower return-fan brake horsepower. This paper discusses control techniques applied to systems installed in the Utah area during 1984 and 1985.
Units: Dual
Citation: Symposium, ASHRAE Transactions, 1986, vol. 92, pt. 2B, Portland, OR
Product Details
- Published:
- 1986
- Number of Pages:
- 12
- File Size:
- 1 file , 1.1 MB
- Product Code(s):
- D-PO-86-01-4
