VDI 4656:2011-04

In the future, micro CHP plants are assumed to supply power and heat for single-family and multi-family houses. Special claims are made to the planners and installers of the plants regarding design and dimensioning. Particularly the design of the electrical and thermal performance of the micro CHP module and the supplementary heater as well as the size of the heat storage unit and further required components have to be considered. The methods developed in this guideline are based on guideline VDI 4655 for the use of the reference load profiles in standard application case. This enables to carry out the comparison of different micro CHP technologies and different dimensions of components with the same framework conditions in planning and dimensioning process. The necessary calculations including the generation of the reference load profiles are supported by a calculation program which is enclosed as CD in the guideline. In object-related planning, the standard heating load of an object is determined for the design of the heat generator performance according to DIN 12831.