- Author
- Arvidson, M. | Dahlberg, M.
- Title
- Dimensionering av koldioxid i installationsutrymmen - personsakerhet. [Carbon Dioxide Discharge Tests in Raised Floor Areas.]
- Coporate
- Swedish National Testing and Research Inst., Boras, Sweden
- Report
- SP Report 1995:34, 1995, 59 p.
- Keywords
- carbon dioxide | enclosures | leakage | floors
- Identifiers
- discharge tests
- Abstract
- [ABSTRACT IN ENGLISH] Carbon dioxide systems are commonly installed for the protection of raised floors in computer rooms. However, using the current requirements for calculating the coneentration needed, the amount of carbon dioxide is generally overpredicted as a small space has proportionately more boundary area per enclosed volume than a larger space. This fact has been a concern as it might endanger the safety of people in areas adjacent to the protected enclosure as the gas leaks out through openings. In this project, discharge tests were performed in a room with low height to floor area to simulate a raised floor area. The amount of carbon dioxide, the discharge time, the enclosure leakage area and the position of the leakages were varied. The concentration, both inside the flooded enclosure and in the room above, the pressure and the temperature were measured during the tests. Compared to a simple correlation for predicting the amount of carbon dioxide needed for the enclosure, reasonable good agreement was achieved. The report also deals with the technique of testing the tightness of enclosures using the door fan pressure method. The experimental results from the discharge tests might be used to compare computer models.