Technology, Products & Services
STEAM SCREW EXPANDERS
The wet steam conundrum
Harnessing the energy from steam to generate power is nothing new.
The key innovation in Heliex’s design is that it can operate with ‘wet steam’ – steam that is at a low pressure and temperature and often contains water droplets that would destroy traditional machines.
Thanks to our patented design, Heliex Systems can generate power, re-energise low pressure steam and drive machinery and air compressors from medium temperature heat sources of between 150C° – 300C°, exploiting all the energy contained within it, which might otherwise be wasted.
Heliex Systems continue to generate electricity even when the steam flow is reduced, for example in summer months, when the heat demand is low.
How do we do it?
The Heliex System is a unique rotary device, the size of a small car that converts expansion energy from steam into useable clean electricity via a simple wet steam cycle.
A wet steam cycle is the thermodynamic cycle of a heat engine that converts heat into mechanical work. The heat is supplied externally to a closed loop, which usually uses water, or in our case steam, as the working fluid.
Our systems operate at 4,500rpm, driving a 3,000rpm asynchronous generator via a toothed belt transmission. In the case of the HP Steam Recompressor they work in reverse.
Steam Screw Expanders
The core technology in our systems is the rotary screw expanders. They may look simple but they’re packed with technology.
Advantages of using rotary screw expanders are:
- Reduced cost and size of the machine
- Minimal wear and tear
- Robust and low maintenance
- No need for timing gears or other costly components
- Able to take in wet steam without any erosion