The smallest Dachs works completely without burning engine, as it is usual with CHP units. Instead, a PEM fuel cell delivers the electricity and heat. With an electrical power of 750 watts, it is particularly suitable for residential homes and other smaller applications.
Fuel cells actually have the advantage that they produce less waste heat than CHP units with conventional burners. This reduces the amount of heat required for the units to run as long as possible per year. This makes them more efficient and, above all, they achieve maximum electricity production even with a high energy building standard, as is common in passive or plus-energy houses. This is also the case with the small fuel cell Dachs. With a thermal power of 1.1 kilowatts, heat production is relatively low. The heat that is not immediately used is temporarily stored in a buffer tank with a volume of 300 litres.
In the summer months, the device can be switched off completely if it is combined with a photovoltaic system. Then it only needs to run in the cold months when room heating is needed. If the heat requirement exceeds the production capacity of the small roof, a peak load boiler integrated in the unit is used.
The Dachs 0.8 is a continued development of the Dachs Innogen. It will be available from October 2019. It contains a hydraulic module with up to two regulated heating circuits and a domestic hot water station. In addition, it comes to the customer with an energy manager, via which it can be integrated into the house network. The manufacturer assumes maintenance intervals for the fuel cell part of the CHP to be five years. Like all condensing boilers, the peak load boiler must be serviced and inspected annually.
company websiteprint this