Double heat exchanger/External speed version

The double heat exchanger is designed to control the
temperature in a deck decompression chamber, self-propelled
hyperbaric lifeboat or tunnelling transfer shuttle.
This combi-unit consists of a heat and cool exchanger.

Product description

Double Heat Exchanger

The double heat exchanger allows operators to control the chamber atmosphere to a preset temperature through a thermostat controller. The unit is completely cast and uses a dependable brushless motor.

Designed for Continuous Operation

Oxygen level, humidity and pressure do not affect motor operation. The heat exchanger is designed to run continuously during diving operations.

An optional fan speed control unit with temperature control is required to operate the double heat exchanger. Motor speed ranges from 1400 to 4000 rpm, while the unit operates at pressures up to 42 bar (420 msw).

Cooling Performance

Performance can vary depending on helium content, chamber pressure, temperature and motor speed. Under the stated test conditions, heat transfer ranges from more than 1.4 kWh in air to more than 5.5 kWh in Heliox at high fan speed.

Specifications

Specification	Detail
Power supply	24–28 VDC, 3.15 A
Rotating speed	1400–4000 rpm
Operating pressure	Max. 42 bar (420 msw)
Cold/Hot water flow	12 liter/min
Cold water temperature	60°C
Pressure difference heat exchanger	> 0.4 bar
Air cooling conditions	1.3 bar (a), 12 l/min cold water at 4°C, internal temperature 25°C
Heat transfer in air	> 1.4 kWh (fan speed high)
Trimix cooling conditions	50% He, 6 bar (a), 12 l/min cold water at 4°C, internal temperature 28°C
Heat transfer in Trimix	> 3.5 kWh (fan speed high)
Heliox cooling conditions	90% He, 10 bar (a), 12 l/min cold water at 4°C, internal temperature 28°C
Heat transfer in Heliox	> 5.5 kWh (fan speed high)
Performance factors	Presence of helium, chamber pressure, temperature, motor speed
Fan speed control	Optional fan speed control unit with temperature control required

Features

Preset chamber temperature control via thermostat controller
Completely cast unit
Brushless motor design
Motor unaffected by oxygen level, humidity or pressure
Designed for continuous operation during diving
Optional fan speed control unit with temperature control required
Performance varies with helium content, pressure, temperature and motor speed
Suitable for air, Trimix and Heliox conditions

Double heat exchanger/External speed version

Questions?

Product description