Search results

This paper aims to determine the halon concentration time-evolution inside an aircraft cargo compartment to design fire extinguishing systems.

A fire suppression system is numerically simulated using the lumped parameter approach.

The halon volumetric concentration, halon and air mass fluxes and the cargo compartment pressure are numerically calculated. It also determines the time to halon concentration to achieve the fire suppressant value (high pressure bottle) as well as its inerting volumetric concentration (low pressure bottle).

In the lumped parameter approach, the dependent variables of interest are a function of time alone, and its spatial distribution is neglected.

This study predicts the fire extinguishing agent behavior aiming to satisfy cargo compartment certification requirements.

This paper uses a simplified methodology, but it represents a very useful tool during the preliminary stages of the aircraft fire suppression systems design.

Fire protection has several components: prevention, containment, detection, and suppression. While building codes and inspectors generally do not require special construction techniques or fire protection systems for computer rooms, economic and service factors may dictate that special protection be given such facilities. This article discusses emergency planning, the various types of fire detection and suppression systems, and future options, with particular attention given to halon and possiblehalon‐replacements.

The Halons have long been recognised as uniquely effective fire extinguishing agents, but are now known to contribute towards ozone layer depletion. In accordance with the latest terms of the Montreal protocol, Halon production will be totally phased out by the year 2000 but this is expected to be brought forward such that Halons 1211 & 1301 may not be available from January 1994.

Describes the properties of the halogenated fire extinguishants Halon 1211 and 1301, their role in ozone depletion and their proposed replacements. Because of their adverse effects on the depletion of the ozone layer, production of Halon 1211 and Halon 1301 is restricted by the Montreal Protocol of 1987. Identifies producers who are conducting research and development for alternative products with low toxicity and zero ozone depletion factors.

Discusses the effectiveness and appropriateness of gas flooding systems to control fire in computer rooms. Explains the workings of such systems, detailing their components and operation. Describes the advantages and disadvantages of gas flooding systems. Analyses the environmental impacts of the various alternatives to halon and provides indications as to when gas flooding is appropriate. Presents alternatives to gas flooding systems and describes some guidelines for the safe decommissioning of halon.

The Minister for the Environment, Mr Padraig Flynn, T.D., has announced a significant technological breakthrough made by TEAM Aer Lingus. “HAL”, the intelligent halon recycler, is a new system of recycling Halon gasses that are stored in jet engine and aircraft fire extinguishing systems. The machine is claimed to be the first of its kind in the world an will be marketed by TEAM Aer Lingus to airlines worldwide.

The worldwide production and the consumption of CFCs are now controlled through the Montreal Protocol. A meeting in London in June 1990 of the signatories of the Protocol will almost certainly tighten the controls on CFCs and introduce regulations to control other common chlorinated solvents. This paper gives the reasons why worldwide control of emissions of chlorinated substances is necessary, the events that led up to the present controls and the prognosis for future regulations. The properties and uses of the six key chlorinated solvents are discussed. Each industrial solvent‐using sector has a range of options available to implement cutbacks and eventual elimination of chlorinated solvents.