Test Results from a Comparative Evaluation of a Condensation Nuclei Fire Detector

Front Cover
1985 - 61 pages
The fire/smoke alarm response of a condensation nuclei fire detector (CNFD) was compared with photoelectric and ionization detectors. Tests were conducted in a former control room 8.5 m by 8.9 with a 2.7 m ceiling. The room had air supplied from above the ceiling and under the floor with return air exiting from ceiling grills. The environment was varied from 278 to 305 K and relative humidities from 8 to 65%. Four detection zones were located in the room. Each zone contained a sampling head for the CNDF, a photodetector, and an ionization detector so that each detector system had four opportunities to alarm during tests. The particle level in the test room was also monitored during tests with a condensation nuclei particle counter. The CNFD responded to 90% of exposures to smoldering plastic and 84% of exposures to visible fire. The photoelectric response was 43 and 12.5% respectively for the same conditions. The ionization response was 9 and 48 respectively.

What people are saying - Write a review

We haven't found any reviews in the usual places.

Contents

ABIRAT
2
TEST CONFIGURATION
8
SMOLDERING URETHANES
14
QQSSLUQim REMARKS
21
Block diagram of detectors and sensing equipment
31
l4 Results for three environments with smoldering PVC
41
2l Results for flaming combustion
48

Bibliographic information