The unit provides hot water supply to divers in water in accordance with the typical requirements of cold sea conditions (30/60/90 lpm). The Magma Sat is equipped with multiple independent heating pressure vessels to allow the maximum level of control in case of failure of one heating element.
The great advantage of this configuration is that it allows operation even in failure mode of any of the resistors, without compromising the continuity of service. In addition, the gradual increase of seawater temperature in the cascade of recipients, only exposes the last resistor to the highest temperature, and therefore to the corrosive action of the heated seawater. This results in less demanding requirements for maintenance and in a longer life cycle of the system
Magma Boiler 1000 Unit with pump
The Magma Boiler 1000 with pump is a hot water unit which supplies hot water to the Saturation Diving System for bell diving operations when the related Magma SAT is out of order or unavailable for an emergency caused by interruption in ship power supply.
It is made up of a 1000-liter tank where the water is electrically heated to 58°C maximum and maintained with a low power consumption. This is the ideal solution to obtain a reserve of hot water, ready for use all conditions, with only the low power consumption required for the operation of the pump.
The system consists of a set of Environmental Control Units (ECUs) designed to control temperature, humidity and provide the requested life support redundancy to the Diving Decompression Chambers.
The Drass range of products is based on the well-known technology of a pressurized high head root blower. Drass introduced this configuration in 1970s and the current ECUs are sons of this proven and reliable solution.
The equipment proposed by Drass as primary environmental control unit is supplied in three versions. The traditional reliability and efficiency of the classic ECU can now be enhanced by a high-end Siemens control logic for the i-Life version, while new stainless steel scrubbers and new interlocking mechanism systems are installed on all versions.
Assignment of the ECUs to the different locks:
Drass ECUs have heating and cooling capacity both rated more than 18 kW. This allows keeping an adequate reserve of power to ensure an excellent performance in dehumidification, heating and cooling, even when more locks are connected to the same ECU, beyond 30 m3 of total volume. The blower works with variable speed and can be regulated at the right speed for the chamber condition.
Efficiency of the blower:
Considering a 30 m3 area, a minimum recirculation rate of about 3 times per hour will be allowed at every depth level, while the rate will be significantly higher at intermediate depth (i.e. 5 recirculation per hour at 150 MSW or almost 8 times per hour at 50 MSW).
With reference to the environmental parameters, the humidity removal and odor filtering capacity will be maintained above normal standards considering the possibility of:
- Using a portion of the external scrubbers with dedicated charcoal, still keeping a high efficiency for CO2 removal.
- Using a portion or even the entire space of the internal scrubbers with dedicated charcoal and other traps. The emergency service of the internal scrubbers will always be available in emergency loading the whole scrubber with soda lime when needed.
Ancillary equipment for ECUs:
Overall cooling and heating capacity can be chosen according to customer requirement and system extension.
The standard configuration uses chillers and heaters with a dedicated set of on board pumps providing redundancy and interchangeability to the life support configuration.
All chillers are supplied with internal active redundancy: twin compressor and twin cooling circuit.
All heaters are supplied with a set of resistors which power can be reduced in case of faults and continue working in a reduced capacity mode.
All heaters are supplied with a set of resistors which power can be reduced in case of faults and continue working in a reduced capacity mode.
Stand-alone ECUs use internal heating and cooling units which do not need to install such an arrangement.
Internal Regeneration Systems:
A set of internal scrubbers and heat exchangers is provided with all chambers of a 100 Series diving system. This is available as emergency method for continuing environmental control when main power for the entire environmental control system is missing.
The Sanitary Water Unit deliveries hot and cold water through two identical pumps. The great advantages of Drass solution are the simplicity, the reliability and the lack of long gas pilot lines from the chambers used in many systems. The water pressure is efficiently reduced at chamber level, on the exterior, and mixed according to the requirements of the divers
The Sanitary Water System is dimensioned to supply different sanitary users at the same time with a flow higher than 80 liters per minute, allowing simultaneous use of the showers. This is a unique feature of Drass equipment.
Sanitary Water Heater
Drass Sanitary Water Heater is a heating unit for sanitary water use, suitable for diving saturation systems.
The equipment heats sanitary water using a 15kW heating element. The outlet port is connected to the Drass Sanitary Water Unit for pumping the hot water with high pressure.
