Comparative analysis of selected ventilator types tested within a low velocity wind tunnel

Conference · Tue Jan 01 04:00:00 EST 1980 · Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States)

OSTI ID:6586785

Schubert, R P; Kennedy, B

Natural ventilation in building design is generally the result of forces arising from buoyancy (stack effect) and wind. An object placed in the path of wind flow causes pressure differentials indicative of the objects shape. These pressure differentials can be used to displace air and hence induce ventilation. This study investigates different ventilator cap types and what effect they have on enhancing air movement. The process and results in which a low velocity wind tunnel was employed to test five basic shapes and their variations are described. Included among these shapes were: exaggerated wing sections, venturi shrouds, delta wings, turbine ventilators and air shields. Each of these geometries were placed on a scaled stack in which the attack and yaw angle were among the variables and were recorded and plotted against induced air movement. The results of these investigations were condensed into a comparative performance index which shows what contribution these cap types can make to natural ventilation and summertime cooling.

• Research Organization: Virginia Polytechnic Institute and State Univ., Blacksburg
• OSTI ID: 6586785
• Report Number(s): CONF-801016-(Vol.2)
• Conference Information: Journal Name: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States) Journal Volume: 5.2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140901 -- Solar Thermal Utilization-- Space Heating & Cooling
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
AIR FLOW
BUILDINGS
DESIGN
EQUIPMENT
FLUID FLOW
GAS FLOW
PASSIVE SOLAR COOLING SYSTEMS
PERFORMANCE
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
STACKS
TUNNELS
VENTILATION
WIND
WIND TUNNELS