Optimising operations based on monitoring activities biomass energy for heating and hot water supply in Belarus 23. April 2008, Minsk F. Promitzer Landes. Energie. Verein Steiermark / Austria f. promitzer@lev. at Folie Quality Management in local biomass district heating plants and grids
Content Background aim of the work 2. Exemplary results of improvements … Ø Control settings of the heat supply station (Peak load boiler) Ø Emissions reduction Ø Change of the control strategy for the pressure control of the district heating grid Ø Many other possibilities/points which have to be considered… 3. Conclusions 1. Folie 2 Quality Management in local biomass district heating plants and grids
Background and Motivation There are many existing local district heating plants driven by biomass combustion systems in Austria Efficient systems are necessary to have the platform for the further integration of CHP and other applications with biomass in the future – to obtain efficient energy conversion/usage systems – and therefore: The economic operability of such systems is the first essential point The lowest possible primary fuel and energy consumption is important The energy losses of the distribution grid should be as low as possible As low as possible emissions is essential … And also the existing plants which have been built during the last 25 years should be improved ! Folie 3 Quality Management in local biomass district heating plants and grids
![Annual heat tranfer [k. Wh/a] per length of pipeline [m] till 2004 Folie 4](https://present5.com/presentation/000b6e6525a8e824a33eb5b307271b81/image-4.jpg "Annual heat tranfer [k. Wh/a] per length of pipeline [m] till 2004 Folie 4")
Annual heat tranfer [k. Wh/a] per length of pipeline [m] till 2004 Folie 4 Quality Management in local biomass district heating plants and grids
![Annual heat tranfer [k. Wh/a] per length of pipeline [m] since 2006 Folie 5](https://present5.com/presentation/000b6e6525a8e824a33eb5b307271b81/image-5.jpg "Annual heat tranfer [k. Wh/a] per length of pipeline [m] since 2006 Folie 5")
Annual heat tranfer [k. Wh/a] per length of pipeline [m] since 2006 Folie 5 Quality Management in local biomass district heating plants and grids
Bioler house equipment – minimum requirement of measurement instrumentation (since 2007) monitoring and optimising systematic collection operating data uniform database leading to better benchmarks Mainly measured parameters (variabls): Heat flow (produced and supplied) electric power consuption (boiler, network pump, electrostatic filter, overall) Data bus consumes (controling and datalogging) Folie 6 Quality Management in local biomass district heating plants and grids
Monitoring and operation optimising of existing plants (old ones) A high-level equipment (data transmission by wireless network) was designed to record operation data of plants. This allows an efficient and cost-effective monitoring Folie 7 Quality Management in local biomass district heating plants and grids
Bioler house equipment – minimum requirement of measurement instrumentation Folie 8 Quality Management in local biomass district heating plants and grids
Examples … Folie 9 Quality Management in local biomass district heating plants and grids
Example: Necessary and not necessary operation of the peak load boiler Source: F. Lettner Folie Quality Management in local biomass district heating plants and grids
Example: CO-emissions of the boiler in 20 -25% part load Folie Quality Management in local biomass district heating plants and grids
Half hourly average values of the biomass boilers COEmissions at 20 -25% part load Folie Quality Management in local biomass district heating plants and grids
P el Folie Quality Management in local biomass district heating plants and grids Heat losses of the net Hydraulic scheme of a typical biomass district heating plant
Electricity consumption of the net pump (@95°C constant) vs. net load Folie Quality Management in local biomass district heating plants and grids
Electricity consumption of the net pump (@95°C constant) vs. net load Folie Quality Management in local biomass district heating plants and grids
There are many other possibilities to be observed/improved… Maximize the specific heat sale per meter of the district heating grid (MWhth/m. Grid) Optimize the combustion system and the emissions of the biomass boiler by improvement of the combustion systems and feeding systems parameters Optimization of the electricity demand for the pumps by ideal dimensioning and frequency controlled performance of the pumps – the control strategy has an essential influence with regard to the operational costs (Dp-control and feeding temperature of the net) Adaptation and improvement of the secondary systems by hydraulic adjustment to decrease the return flow temperature as much as possible Folie 16 Quality Management in local biomass district heating plants and grids
There are many other possibilities to be observed/improved… Check if all the hydraulic valves are in their expected position Check the control systems of the pumps (Dp-control) Check the possibilities to reduce the feeding temperatures of the grid in times of reduced load Periodic Analysis of the heating carriers (water) quality Folie 17 Quality Management in local biomass district heating plants and grids
Conclusion There is significant potential to improve the efficiency of district heating systems with essential impact on: Environmental issues (emissions) Biomass fuel consumption Other energy demand (especially electricity demand) long term availability and lifetime and economics Folie 18 Quality Management in local biomass district heating plants and grids
Acknowledgement The work has been done within the Austrian project “QM-Heizwerke”, funded by the Austrian federal ministry of environment and agriculture and the local Styrian Landesenergieverein Folie 19 Quality Management in local biomass district heating plants and grids
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