The HERU Technology - How
A Genius Home Energy Resources Technology
Globally patented technology that could put an end to fuel poverty, provide a significant reduction in carbon and substantial savings for local government.
The genius aspect of the HERU technology, is utilising a well know industrial heat treatment technique known as pyrolysis, but doing it at very low temperatures (up to 300O°C). Pyrolysis is a thermochemical decomposition process, which converts substances in the absence of oxygen into oil, synthesised gas (syngas) and char, with the temperature affecting the ratio and chemical composition of outputs. The breakthrough engineered and patented by the team and Brunel University London, is the development of heat pipe technology making the pyrolysis chamber the most effective ever developed.
The HERU is a highly efficient energy recovery system with outputs that have been thoroughly tested as being clean and safe to release to air and sewer.
How it works
The HERU coverts many materials found in the home, such as paper and card, packaging, plastics, garden clippings and food scraps into fuel for domestic heating applications. Items are placed in the chamber and undergo three process stages:
- Stage 1: Drying. The chamber heats up to around 100O°C, which dries out the material (a typical mix usually contains 47% moisture) by boiling off any moisture as steam. This steam is packed with energy so passes over heat exchangers enabling this heat to be transferred to water making it hot for your home. The condensed steam is then flushed to sewer.
- Stage 2: Pyrolysis. The dried matter is then heated up to 300O°C, decomposing it in the absence of oxygen. This releases an oily vapour containing oil and syngas. The tiny amount of oil condenses on the heat exchanger and is washed off every 15 minutes with water jets and detergent and flushed to sewer. As the process operates under low temperatures, the process doesn’t break the hydrocarbons found in the oil, making the tiny amount of oil produced safe to flush to the sewer. The small amount of syngas is then cleaned using our patented water screen filtration system, compressed and stored ready for combustion in the home boiler as and when required. An inert, valuable, high calorific char glowing at around 300O°C remains in the chamber.
- Stage 3: Combustion. Air is introduced to initiate combustion on the char creating an exothermic reaction that releases the heat energy stored in this material. The exhaust gases pass over the heat exchanger to recover this energy, before being cleaned via the water screen filtration system and then compressed and stored ready for combustion in the boiler as and when required. A small amount of ash is leftover at the end of the process, which is also flushed to sewer accounting for about 1-3% of the original material mass.
How it recovers energy
The heat collected by the heat exchanger, mostly during stages 1 and 3 (which release the most energy via steam or syngas) is used to pre-heat water for the boiler, storing it in a tank, which the boiler uses for domestic use in the home. The HERU’s cleaned, compressed syngas, generated during stage 2, is used as a gas fuel in the normal home boiler, via the air inlet valve, meaning the boiler needs less natural gas or oil to operate making it a fully hybrid boiler. The HERU process generates 2.5 times the amount of energy required to operate it.
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