Implementation information
  • Investor: B + T Přeštice s.r.o.
  • Implementation: 2017
  • Description: The project solves the reconstruction of the heat management system of the Municipality of Přeštice with the objective to reduce the natural gas consumption with maximum utilisation of residual heat from the combined cycle units, which are biogas-fired. Three sources of heat, which are hydraulically interlinked and jointly supply heat energy to the central heat source network were merged. This approach to the operation of the system is ensured by high variability of the utilisation of individual heat sources. This especially concerns the unrestricted possibility to distribute heat from an arbitrary combined cycle unit to the point with the highest consumption. This makes it possible to increase the heat consumption from the combined cycle units and reduce the number of gas boiler starts during the short-term consumption peaks. The WebHeatControl central dispatch was installed. The modern control system allows the direct connection of the heat meter data reading module. All heat meters are newly connected directly to the control system and the data are processed immediately for control and optimisation of operations. This allows on-line monitoring of the production and consumption of energy (the reading is picked from each device every 4 sec). A perfect overview of the production and consumption allows the operation of a unified central heat source with multiple sources without its division into individual separate sections as was usual in the case of similar projects.
    The system is controlled by optimisation software, which allows planning of the operation of sources, forecasts according to the future climatic conditions make it possible to increase the offtake from the combined cycle units, i.e. heating of the hot water system only just prior to the expected consumption peak.
    Each of the heat sources is technically designed for capability to supply heat energy to the whole network of the central heating source. An integral part of the technology is also the on-line measurement of the pressure conditions at the individual offtake points. Based on the designated priorities for the heat offtake stipulated by the supplier of the residual heat, the KGJ capacity is used to calculate and make the output curves for the individual pumping modules at the given heat source.The project won the Czech Energy and Ecological Project of the Year award.