Tomas Sysala

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.

The Microcomputer Application in Physical Principles Demonstration Model Design

The article describes a design of a microcomputer system which is realized in the educational scale model control for physical principles demonstration. That particular design project was a part of the educational facility complex project called Experimentarium aiming at basic school and high school students. The article introduces two racing car models controlled by a microcomputer. The first model set demonstrates the speed and acceleration calculation based on a real time measurement. That calculation result can be compared with results obtained during a running man experiment. The second car model set demonstrates a downforce keeping the car riding the ceiling with wheels upside down. The microcomputer control system is based on microprocessors by Atmel, and the system is described in details including illustrative pictures, schematics and graphs.

The Monitoring and Control Systems for the Real Equipment Controlled by PLC in Education

Abstract This paper is focused on education in the field Measurement and control of technological processes. In one part of this field students obtain theoretical knowledge in an application of commercial systems for measurement, visualisation and control of technological processes. The data are measured by a programmable controller (PLC) and as the superior systems the system InTouch, Wizcon and ContolWeb2000 were used. All systems were tested on the real equipment. The programmable controller controls the surface of two communicating vessels and at the same time is a data source for master applications that are designed for the systems InTouch, Wizcon and ContolWeb2000. The contribution also describes visualisation systems and serial communication for Windows and gives the description of the ModBus protocol.

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.