AS4391 HOT SMOKE TEST Kowloon Station Development

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AS4391 HOT SMOKE TESTKowloon Station
Development
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The Project

• Large Retail / Public Concourse Development
• Complex layout and escape routes
• Smoke management zoning and extraction via static
  vents
• FSD Requirement for Hot Smoke Test

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Prime Test Objectives

• To verify correct performance of the smoke
  management system against approved design-
• Satisfactory operation of smoke detection
• Correct sequence of control of alarms, smoke
  vents and applicable air inlet arrangements
• Attaining adequate smoke layer depths / smoke
  clear heights
• Visual demonstration of smoke venting performance
  including satisfactory flow of smoke.
• Conformance to HK FSD Circular Letter 2/2002

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AS4391 Methodology

• Standard Test Fire Sizes Available
• Tabular Data for different heights-
• plume volume flow rate
• plume temperature
• Use of Data Tables -
• Interpolate for required height
• Select nearest test fire size giving ceiling
  temperature 10Clt sprinkler activation temperature

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Data per AS 4391 Table A1 A2
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Smoke Clear Height Plume Volume
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Test Measurement Philosophy

• Mandatory Ceiling Temperature Measurement above
  plume
• Vertical thermocouple tree located away from
  turbulent plume (assess rate of accumulation of
  smoke in reservoir)
• Visual and thermographic assessment of smoke
  behaviour
• Record actual detector operation time
• Extract operation time simulated to match design
  sprinkler response time
• Alcohol tray heat source per AS4391 configuration
• Tracer smoke injected into entrained plume - high
  injection adopted to avoid burning of smoke

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Atrium Location for Test
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Technology

• Type K thermocouple array and telemetry cables
• PC based data logging
• Infra red imaging camera
• Video cameras
• Communications
• Access platform/s for installing telemetry
• Fire extinguishers / standby fire crew with
  breathing apparatus and appliances

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Typical Layout
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Data Logging

• Analysis of smoke layer growth before and during
  static extract

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Lessons Learned from Trial

• Relocate thermocouple tree to less turbulent
  position

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Thermal Imaging

• Views of the plume and smoke layer satisfactorily
  stratifying within the confines of the smoke zone