Battery Powered Temporary Refuge shelter (TR) or Toxic Gas Refuge (TGR): Meeting Requirements, Optimising Safety

BATTERY POWERED TEMPORARY REFUGE SHELTER (TR) OR TOXIC GAS REFUGE (TGR): MEETING REQUIREMENTS, OPTIMISING SAFETY

HVAC forms an essential part of the essential safety services onboard a rig and a part of the area classification requirements associated with electrical equipment. The HVAC systems should prevent any potentially explosive or toxic gas-air mixtures entering non-hazardous areas such as living quarters.
The Battery Powered Temporary Refuge Shelter fully complies with the requirements of HSE (Health and Safety Executive) and ISO. It was designed by TLS Engineering, a leading specialist in maritime air conditioning, central heating and cooling, and mechanical ventilation.
 
What are the requirements?
HVAC systems should provide for a pressure differential in non-hazardous areas with all access doors closed of which is at least 50 Pa above that of the adjacent hazardous areas.
TR areas should have a pressure of between 50 and 75 Pa. in order to measure pressure decay over time. This is used to calculate an air leakage rate and a performance measure of the structure’s integrity (usually taken as 0.35 air changes per hour).
Ensure speedy response to inlet-gas detection and time to stop the HVAC.
Take into account consequences for personnel and/or the atmosphere of a build-up of contaminants.
Maintain pressure in the TR area during an incident while ensuring sufficient air flow so that any leakage or other ingress (e.g. through the use of doors) is diluted and displaced.
Ensure availability of power sources to drive the HVAC system during an incident.
 
TLS solution
In response to a gas alarm, all HVAC exhaust systems will be switched off and the fire and gas-tight dampers closed. This will totally seal off the accommodation.
Our specially developed Temporary Refuge unit is not only sufficient for maintaining pressurisation in the TR area and keeping the accommodation at the ≥ 50 Pa. overpressure mark. It also serves as a battery powered HVAC unit.
 
Please contact TLS for more information [email protected]