Vitobloc CHP units – power and heat generation in an economical combination

Efficient energy supply through CHP

The high efficiency of combined heat and power generation is based on the fact that when electricity is produced by a generator driven by a gas combustion engine, this process generates heat as well. Viessmann Vitobloc CHP units use this waste heat to produce heating water and DHW. The overall efficiency is thus significantly higher than when power and heat are generated separately. The Vitobloc 200 EM-20/39 unit has an efficiency level of up to 95  percent. Its thermal efficiency is 63  percent and its electrical efficiency is 32  percent.

Vitobloc is effective where the demand for heat and power is high

Viessmann Vitobloc  200 and 300 CHP units demonstrate their strengths particularly where heat and power are required constantly. To enable the longest possible runtimes, a buffer cylinder can be integrated to store the heat, depending on the consumption profile of the building. On the electricity side, the aim is to achieve the highest possible self-consumption of the power produced on site. Because of high electricity prices, this is more profitable than the remunerated feed-in to the public grid.

Viessmann Vitobloc 200 and 300 CHP unit product range

The Viessmann range of CHP units includes the Vitobloc 200 and 300 product series. Both are supplied fully ready for connection and offer impressive reliability. With intervals of up to 6000 hours run without oil top-up, Vitobloc 200 CHP units are particularly easy to maintain. With the Vitobloc 300 models, the maintenance intervals are even longer, at up to 8000 hours. The latter are H2 ready, meaning they are all set for futureproof heating: in principle, operation with 20 percent hydrogen in the gas mixture is possible. Particularly high efficiency is achieved here through condensing technology. This is also used in some models of the 200 product range and can sometimes be retrofitted with a downstream condensing heat exchanger.

Tailored to individual needs

Vitobloc CHP units offer innovative technology for a wide range of applications. Due to the variety of output sizes, the product range includes the right system for almost every requirement. In addition to standard products, it is also possible to produce units tailored to individual needs. This allows the system to be customised exactly to the respective application. Viessmann CHP specialists are available to assist the trade partner carrying out the work to ensure optimum implementation. They provide support with engineering, project planning, sizing using energy consumption data, and applying for government subsidies.    

Vitobloc product ranges at a glance

The following overview shows all Viessmann Vitobloc 200 and 300 models sorted by product range and ascending output. Note: the Vitobloc 200 EM-260/390 MT does not have an exhaust gas heat exchanger and if used with high exhaust gas temperatures, is suitable for integration with waste heat boilers. In the Vitobloc 200 EM-430/580 (SCR) and 200 EM-530/660 (SCR), an SCR catalytic converter ensures particularly low nitrogen oxide emissions.