Technology

Energetix Genlec Ltd has developed its Kingston microCHP product based on the Genlec technology.

The Genlec® core technology is a modular organic Rankine cycle (ORC) which is driven by heat such as combustion heat from a natural gas boiler. The ORC circuit and components are very similar to those found in refrigeration circuits. The technology platform utilises a single burner as the source of heat, being able to transfer its heat to the ORC and boost heat exchanger as demand for heat from the appliance requires.

Energetix has developed key areas of this technology platform, in particular the scroll expander/ generator, working fluid pump and power electronics. In addition Energetix has developed a primary heat exchanger capable of providing the heat flows for the ORC circuit.

The flow diagram below illustrates the configuration of the technology; the gas combustion provides heat preferentially to the ORC evaporator which evaporates the pressurised working fluid within the closed ORC circuit. This vapour then passes through a scroll expander (a positive displacement device equivalent to a piston engine), the working fluid expands, driving the scroll to rotate the generator, which in turn converts the pressurised vapour into electrical energy to be transferred to the low voltage mains. The reduced pressure working fluid vapour then passes through a condenser where it gives up its heat to the heat circuit of the dwelling by changing state from vapour to liquid, returning to its low pressure and temperature state before being pumped around the circuit again. 

Energetix Genlec continually develops innovative solutions for its technology and considers its patents an important part of its technology base. Its patents cover the systems and configurations as well as discrete technological innovations.

Whilst the technology platform has been developed into a product using natural gas or LPG as a fuel, it would be possible to integrate the Genlec power module with other fuel sources that can deliver the appropriate heat flow and temperatures.