Attenuation of Radiant Heat on LNG/LPG Carriers with Freestanding Water Curtains (eBook)

Published Date

January 1986

Attenuation of Radiant Heat on LNG/LPG Carriers with Freestanding Water Curtains (eBook)

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This paper describes a study to assess the feasibility of using water curtains on LNG carriers for evacuation of crew. (17pp)

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In the event of an accident onboard a gas or chemical carrier resulting in loss of containment and fire, the crew may be exposed to excessive radiant heat and concentrations of toxic vapours. In order to provide protection from these hazards during evacuation from the accommodation area to the lifeboats, the feasibility of the use of a barrier of sprayed water curtains has been investigated. Previous work on the subject has been performed in England, Germany and Japan. The principles and important parameters have been established, but no useful predictive model of the physical processes had been produced and experimental conditions varied so widely that it was not possible to predict with confidence the behaviour of a water curtain of arbitrary composition. Principia Mechanica has been sponsored by the UK Department of Transport in a project to gain an understanding of the physics of the radiative heat transfer process within the water spray, and of the parameters important to spray performance, in order to assess the feasibility of using water curtains on LNG carriers for evacuation of crew.

It was first necessary to identify accident scenarios and establish design basis fires and heat fluxes. The physical constraints imposed by the geometry and operating conditions of the ship were considered to obtain a preliminary design. The bulk of the work involved the development of a numerical model of the scattering process within the water spray, together with experimental validation. The resulting performance predictions have been sufficiently promising to justify a second phase of work. The emphasis of the second phase is on full scale experiments, concentrating on the behaviour of the curtain in wind. The work performed during the first phase is considered in the rest of this paper.

Paper Delivered by:
Miss S Stephenson
Dr. MJ Coward
(both of Principia Mechanica Ltd)

Prepared for:
Gastech Hamburg 1986

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: Attenuation of Radiant Heat on LNG/LPG Carriers with Freestanding Water Curtains (eBook)
Product Code: 4433g131
Published Date: January 1986

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