Reports on the renovation of an organic chemistry research laboratory which included the installation of 18 variable-volume fume hoods in a single space. Each fume hood was equipped with a local face velocity controller. All exhausts were ganged to one variable-speed exhaust fan whose speed is modulated to control static pressure in the exhaust duct. Problems were encountered with the fan speed controls components. Good control was finally achieved by connecting them to the central energy management and control system (EMCS). The large volume of exhaust air required in the space created room pressurisation problems. Air flow reduction and energy savings depend on user cooperation in closing the fume hood sashes. Fan speed was monitored continuously by the EMCS, which indicated nightly decreases. States that energy savings were apparent even with open bypass grilles on the hoods. Tests demonstrated the greater energy savings with the bypass blocked.
KEYWORDS: Case studies, fume cupboards, laboratories, USA, research.
Citation: Symposium, ASHRAE Transactions, vol. 96, pt. 2, St. Louis 1990
Product Details
- Published:
- 1990
- Number of Pages:
- 4
- File Size:
- 1 file , 530 KB
- Product Code(s):
- D-18719
