Jaroslav Balátě

The Way of District Heating Output Control by Means of Hot Water Piping

Abstract The presented algorithm design of the control of district heating output by means of the hot water piping eliminates the transport delay. That transport delay occurs in the case in which is used the qualitative way of control only and is depending upon the velocity of hot water and upon the length of hot water piping. The new qualitative-quantitative method of control of district heating output by means of hot-water piping which is simultaneous and continuous action of two manipulated variables i.e. qualitative part (control of temperature difference on the heating plant exchanger) and quantitative part (control of rate of flow through the circulating pumps) enable to eliminate the transport delay between the heating plant exchanger and a remote locality of relatively concentrated consumers.

Strategy of Control of Extensive District Heating Systems

Abstract The District Heating Systems (DHS) are being developed in large cities in accordance with their growth. The DHS are formed by enlarging networks of heat distribution to consumers and at the same time they interconnect the heat sources gradually built. DHS is used in larger cities of some European countries e.g. in Germany, France, Denmark, Finland, Sweden, Netherlands, Czech Republic, Poland and others. Production technology of heat by means of combined production of power and heat (CHP) is an important way to increasing of thermal efficiency of closed thermal loop. The paper shows the system access to the control of extensive DHS - controlled plant. It concerns automatic control of technological string “production, transport + distribution, consumption” of extensive district heating and that is the contribution of this paper. Control by means of advanced control algorithms is a tool (up to now neglect) for decreasing cost of energy and increasing the level of environment protection.

One of possible approaches to control of multivariable control loop

Abstract This paper deals with description of one of possible approaches to control of MIMO control loops with utilisation of the so called binding members and correction members. The designed method of control combinations classical way to ensure of autonomy of control loop via binding members and the use of the method of SISO branched control loops with measurement of dominant disturbance variables to ensure of invariance of control loop by means of correction members. Simulation verification of this method was carried out for three-variable control loop of a steam turbine.

THE WAY OF DISTRICT HEATING OUTPUT CONTROL BY MEANS OF HYDROTHERMAL POWER SYSTEMS – THREE MODIFICATIONS

Abstract District Heating Systems (DHS) are being developed in large cities in accordance with their growth. The DHS are formed by enlarging networks of heat distribution to consumers and at the same time they interconnect the heat sources gradually built. DHS is used in larger cities of some European countries e.g. in Germany, France, Denmark, Finland, Sweden, Austria, Czech Republic, Poland and others. Production technology of heat by means of combined production of power and heat (CHP) is an important way to increasing of thermal efficiency of closed thermal loop. The paper shows the system access to the control of extensive DHS -controlled plant. It concerns automatic control of technological string :production, transport + distribution, consumption” of extensive district heating and that is the contribution of this paper. Control by means of advanced control algorithms is a tool (up to now neglect) for decreasing consumption of energy and increasing the level of environment protection. The paper deals with 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.

The Way of District Heating Output Control by Means of Hydrothermal Power Systems

Abstract The paper deals with 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. The separate modifications are as follows: 1. Qualitative – quantitative way of control of hot-water piping heat output using prediction of the course of daily heat supply diagram in district heating systems. 2. Adaptation of qualitative – quantitative way of heat supply control for the case of using part of the piping for heat accumulation. 3. Algorithm of qualitative – quantitative way of control of hot-water piping output with using hot-water boilers as heat sources. Modifications of the way of control are different due to possibility of implementation into specific conditions in separate localities of district heating systems.

Strategy and Philosophy of District Heating Systems Control

Abstract The District Heating Systems (DHS) are being developed in large cities in accordance with their growth. The DHS are formed by enlarging networks of heat distribution to consumers and at the same time they interconnect the heat sources gradually built. DHS is used in larger cities of some European countries e.g. in Germany, France, Denmark, Finland, Sweden, Netherlands, Czech Republic, Poland and others. Production technology of heat by means of combined production of power and heat (CHP) is an important way to increasing of thermal efficiency of closed thermal loop. The paper shows the system access to the control of extensive DHS - controlled plant. It concerns automatic control of technological string “production, transport + distribution, consumption” of extensive district heating and that is the contribution of this paper. Control by means of advanced control algorithms is a tool (up to now neglect) for decreasing cost of energy and increasing the level of environment protection.

Summary of Development of Simulation of the Fuzzy Control of District Heating

Annotation The paper deals with summary of a Fuzzy-control application was examined for the heat supply control by circular heat networks. In the large cities with the district heating system (abbreviated as the DHS as follows), the produced heat is distributed to the consumers through the circular networks, that are supplied by several co-operating production sources of heat, that means by power and heating plants and heating plants.