- First CHP system in Germany in everyday operation with purely regeneratively produced hydrogen
Heek, September 12, 2018 - 2G Energy AG (ISIN DE000A0HL8N9), one of the internationally leading manufacturers of gas-driven combined heat and power (CHP) systems, has received an order to deliver a purely hydrogen-driven CHP system to Stadtwerk Hassfurt GmbH. Together with the customer, 2G is thereby realizing a project that is groundbreaking in regenerative energy supply in combination with wind and solar energy. Hydrogen burns without emitting any carbon dioxide and almost without any harmful emissions at all, making it significantly more environmentally and climate compatible as a fuel than natural gas.
The higher costs incurred in the production of hydrogen to date and the problem of its availability are resolved commercially in the project through making recourse to local regenerative wind and solar energy producers. The hydrogen is produced by a power-to-gas-system located in the port of Hassfurt. This utilizes surplus electricity generated by the wind park in the adjacent Sailershäuser Forest for the electrolysis of the water. The CHP system then reconverts the hydrogen into electricity and heating in line with demand, achieving efficiencies of > 90%. The electricity from the CHP system is fed into the city's electricity grid. The heating is to be transferred to a neighboring malt factory, a school and a kindergarten via a heating grid that has yet to be constructed.
2G's hydrogen CHP systems represent an important building block to offset volatile energy production capacities through solar and wind power, making an important economic contribution to future supply security - especially given the enormous generating capacities that are to exit the grid with the phase-out of nuclear power plants by 2022 (around 13 % of production capacity) and the planned exit from coal (approximately 39 % of generation capacity). The power-to-gas method enables surplus electricity from wind and solar power to be stored in the form of hydrogen on a cost-efficient basis over long periods and within the already existing natural gas network as well as in tanks, from where it can be reconverted into electricity in response to demand. Hydrogen CHP systems thereby provide balancing energy in combination with regenerative producers.
Implementing only slight adjustments to a standard natural gas module, 2G has achieved technical success in enabling the highly efficient exploitation of hydrogen on a cost-sensitive basis. Compared to an equivalent basic motor, electric output of 168 kW is reached in hydrogen operation (natural gas: 210 kW) on a CO2-free basis. The mechanical motor efficiency is higher than that of natural gas-driven CHPs thanks to the rapid combustion of hydrogen. The utilization of standard components already makes hydrogen CHPs only slightly more expensive than a comparable natural gas-operated system.
The hydrogen modules comprise an expedient addition to 2G's existing product range and support the company in its strategy of producing generation units for both balancing and offsetting energy. The 2G hydrogen technologies are also suited to other high-hydrogen-content gases, and can be deployed without problem with variable (natural) gas mixtures.