The way of district heating output control by means of hydrothermal power systems - three modifications

This chapter summarizes some of the experiences while designing control strategy for extensive DHS (district heating system) in the towns of Brno, Prague and Most-Komorany in Czech Republic. DHSs are being developed in large cities in accordance with their growth. DHSs are formed by enlarging networks of heat distribution to consumers, and at the same time, they interconnect the heat sources gradually built. Production technology of heat by means of combined production of power and heat (CHP) is an important way to increase thermal efficiency of closed thermal loop. The system access to the control of extensive DHS-controlled plant concerns the automatic control of technological string production, transport plus distribution, and consumption of extensive district heating. Control by means of advanced control algorithms is a tool for decreasing consumption of energy and increasing the level of environment protection. A brief description of three modifications of the way of control of hot-water piping heat output at simultaneous operation of qualitative and also quantitative parts of control is provided. © 2007 Elsevier Ltd All rights reserved