Description of EHFE technology
Picture 4 represents a schematic diagram of a steam installation demonstrating another example of EHFE technology. Just like in the scheme, described above (Picture 3), the principle of pump-free working fluid circulating and its heating by intermittent fragmentation of the working fluid in the radial chambers is also implemented. The working fluid is not replaced when it is heated in the radial chambers. The working fluid is located in the same cell from the moment it is filled in the form of condensate and until it goes out as vapor. The chambers are filled in and emptied by switching the working fluid supply and discharge channels, the flow of the heating medium is also redirected, given chambers' warmup, as in countercurrent heat exchanger. In the pilot plant, developed by our team, a distributor unit is used to switch heating medium flows, as well as supply and discharge working fluid. Moreover, discharge working fluid (intra-cyclic recuperation) is used as the flow of the heating medium inn this pilot plant. In contrast to the process, described above (Picture 3), there are absolutely no permanent losses, associated with the working fluid movement between the chambers, in the process, depicted in Picture 4. The power, consumed for distributor rotation, is very small and initially estimated to be up to 1% of the total generation. A lot of work has already been done and significant amount is in progress. Intensive patenting activities are being carried out. Apart from intra-cyclic recovery scheme, an isothermal reciprocating converter is used in our pilot plant. We continue research activities using our pilot plant along with technology partners and are preparing for further R&D efforts together with SFU scientists. Scientific opinion on the prospects of further development was obtained. We performed basic calculations, demonstrating plant efficiency, using specific capacity of about 37% of the ideal cycle efficiency factor, applying pentane as working fluid at maximum temperature of 240 °C. 240 °C is far from the temperature limit, the plant materials allow to increase temperature at least two-fold, hence efficiency and power density may be increased. Important feature of the proposed scheme is ability to work on supercritical parameters for working fluids with phase change and gaseous working medium as there is no need to maintain difference between vapor density and working fluid liquid phase density.
Important part of EHFE technology is flow distribution in the above described manner and it is especially promising, because it allows achieving maximum efficiency with general simplicity of the engine or steam power plant design.