temporary refuge unit

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Ventilation Air Conditioning RefrigerationHeating

22ºCInside

OUTSIDEHUMIDITY

PROVIDED BYHEINEN & HOPMAN

35 C

90%

productsTR (Temporary Refuge) pressurization unit

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APPLICATION

Our TR-unit basically consists of an explosion proof fan, a filter section that filtrates H2S & SO2 and optionally a heater. The power supply is coming from the vessels Uninterrupted Power Supply (UPS) system or optionally by a battery power pack to ensure operation at all times.Our TR unit provides clean filtered fresh air, free from H2S & SO2 contaminates in an over pressured Temporary Refuge area. Three levels of filtration (G4, F7, and active carbon) is applied to incoming air before being supplied to the TR. The control system constantly compares inside and outside pressures and LEL’s, and should the TR area pressurization or LEL levels fail, provide a visual and/or audible warning.Our TR unit is designed for external installation to TR areas with a supply duct to the TR area interior. The TR unit control panel is designed to be installed internally within the TR area.When the TR unit is operational the unit is designed as a fail-safe system, i.e. should the unit sustain damage or an air seal leaks, then clean air will leak out of the unit rather than contaminated air being drawn in.During normal operation is the TR unit “dead” and closed by gastight dampers. It comes operational for emergency situations.

INTRODUCTION

The Cullen Report into the Piper Alpha disaster (Cullen, 1990) recommended that a temporary refuge (TR) should be provided on all offshore installations. The TR is required to have a defined performance standard related to its survivability when exposed to a major accident that includes, but is not limited to, ingress of smoke, flammable and toxic gas. HVAC forms an essential part of

this. As the TR is the last space for the crew before abandoning the vessel, rig or platform, the HVAC system should create and maintain a comfortable and safe indoor condition free of any explosive and/or toxic gas-air mixtures.The air quality and pressure inside the TR-zone is than of top priority. This can be created by our special TR pressurization unit (TR-unit).

KEY FEATURES

• Design according DNV, NMD, NORSOK, HSE. ABS, LR & BV;• Ambient range from -20°C/15%RH to +45°C/80%RH• Casing leakage according to class L1, EN-1886• ATEX Zone II• Reliable• Double walled SS316L• UPS powered (optionally with battery power pack)• Easy service and maintenance access;• Standard H2S concentrations 200 / 400 / 600 ppm• Standard capacity 1000, 4000, 6000 and 7500m³/h. (600ppm)

Information

01 - Inlet grill and motorised control damper (Ex) 03 - Purafil SP Blend, dual hydrocarbon filter, ATEX 05 -

02 - Pre filter, class G4, ATEX, Second filter, class F7, ATEX 04 - Fan motor, 3 x 230V / 50 Hz, Ex-II-2G-d-IICT4 06 - Flow switch &

- Fan, anti-sparkling, Ex-e/d + brass lining 07 - Motorised gastight damper, Ex

- Flow switch & H2S and CH4 sensors (Ex)

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FUNCTIONING

TR 1000

Technical Data TR-1000-3 - 50Hz / 60Hz

Ambient H2S concentration 600ppm

TR H2S concentration 10ppm (60min)

Air quantity 1.000m3/h

Pst 1.350Pa

Execution SS316L, ATEX Zone II

Primary filter G4

Secondary filter F7

Tertiary filter Activated Carbon + Alumina

Power supply fan3x380V-50Hz / 3x440V-60HZ

Rated power 1.1kW / 1.3kW

Power supply heater3x380V-50Hz / 3x440V-60Hz

Capacity (custom designed) kW

Power supply valves 1x230V-50Hz / 60Hz

Weight (excl. heater) 1225 kg

Control panel (separate delivery

Safe Area

Technical Data TR-1000-3 - 50Hz / 60Hz Technical Data TR-4000-12 - 50Hz / 60Hz




Pst 1.350Pa


Primary filter G4

Secondary filter F7









Safe Area

TR 4000

TR 6000





Pst 1.350Pa


Primary filter G4

Secondary filter F7









Safe Area


Alternatives available on request.Owing to continued product development Heinen Hopman reserves the right to introduce alternations without prior notice.





Pst 1.350Pa


Primary filter G4

Secondary filter F7









Safe Area

TR 7500

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temporary refuge unit

Engineering