- Author
- Wighus, R. | Aune, P. | Drangsholt, G. | Stensaas, J. P.
- Title
- Full Scale Water Mist Experiments.
- Coporate
- Norwegian Fire Research Lab., Trondheim, Norway
- Report
- SP Report 1994:03
- Book or Conf
- Swedish National Testing and Research Institute. Water Mist Fire Suppression Systems International Conference. Water Mist Instead of Halon? Proceedings. November 4-5, 1993, Boras Sweden, 101-152 p., 1993
- Keywords
- mist | water | fire suppression | experiments | extinguishing | droplet size | fire tests | nozzles | scenarios | spray nozzles
- Identifiers
- turbine hood
- Abstract
- This paper is based on the results from two test series, called Phase I and Phase II of the project "Halon Replacement by Fine Water Spray Technology - Turbine Hood Application". Detailed results are presented in technical reports from Phase I and Phase II. The tests were carried out in two different scales, one 30 m3 test enclosure formerly used to characterize different water spray nozzles, and a full scale 70 m3 model of a turbnine hood. The scope of work in Phase I was to identify the extinguishing characteristics of various nozzles developed by BP Sunbury Research Centre, UK, and to verify the efficiency of a total fire suppression system developed by Ginge-Kerr Offshore. The fire suppression system uses a twin-fluid nozzles using air and water at pressures about 5 bar. The nozzles produce a water spray with small droplets and high velocity. The scope of work of Phase II was to verify the efficiency of the Fine Water Spray nozzles fighting a variety of fire scenarios which may occur in a real turbine hood. A full scale test enclosure containing a mock-up of a turbine heated internally to simulate hot metal surfaces, with insulation mats and piping as in a real turbine hood, was constructed in the large test hall of SINTEF NBL. Realistic fires with Diesel pool and spray fires, fires in insulation mats soaked with Diesel oil under different ventilation conditions were ignited in the turbine hood model. Number of Fine Water Spray nozzles, nozzle position and spraying sequences were varied.