The evaluation of the performance characteristics of the device has a many type, depending on the monitored parameters. In the field of continuous measurements there is a quantum of measurement systems that allow long-term tracking and feedback. Part of the submitted contribution concerns the creation of a cogeneration unit model to monitor the flue gas pathways in relation to the production of pollutants in a nondestructive method. In the case of non-destructive monitoring and interventions in the objects, the use of the virtual laboratories. Such laboratories represent a computergenerated virtual environment in which a model of a particular device is created and a simulation of specific aspects of the matter. The priority given in this paper focuses on the correctness of the operation of the existing system in the case of integration of an external device into the existing flue path and the subsequent analysis of the influence of the further course of the flue gas particles.

Presented paper is dedicated on issue of the operation of a cogeneration unit integrated in the central heating system. An evaluation of the efficiency of the cogeneration unit operation is performed during heat water preparation and later the heating season. Indicators are evaluated as the correlation between the primary fuel and the electrical and thermal energy consumption. The main idea is following combined generation of electricity and heat with look at efficiency of the cogeneration unit in the central heat supply system in terms of heat generation.

To achieve optimal capture of solar energy and its use by collectors, it is essential that they are directed in a suitable direction to capture a substantial amount of sunlight. This paper deals with the issue of the energy gain of thermal flat collectors with usage of the collector field rotation and its comparison with the system with the conventional method of fixed collector placement.

The main idea of using combined heat and energy production is to reduce usage of primary fuels and with that connected reducing of pollutions due to the integration of renewable energy sources and with regard to the natural environment. Presented contribution is dedicated on issue on the operation of a cogeneration unit integrated in central heating system. The purpose of currently contribution is to analyse and compare effectivity of cogeneration unit in each summer and winter season.

The purpose of currently contribution is to analyse and compare effectivity of cogeneration unit in each summer and winter season. The main idea of combined heat and energy production is to reduce usage of primary fuels and with that connected reduction of pollutions due to the integration of renewable energy sources and with regard to the natural environment. Presented contribution is dedicated on issue on the operation of a cogeneration unit integrated in central heating system.