TRNSYS Model with 3-Way Valve for Heat Carrier Temperature Control of Solar Thermal Collectors Integrated into District Heating System

BuildSim-Nordic 2022: Technical Papers 2022
Raimonds Bogdanovičs, Anastasija Zeiza-Seļezņova, Jurģis Zemītis, Aleksandrs Zajacs

TRNSYS and TESS component libraries do not have a valve with flow control dependent on system pressure and valve hydronic characteristics. To analyze the influence of valve Kvs coefficient, actuator time constant, hysteresis and inherent characteristics on heat carrier flow and temperature fluctuations in a short period (0.1 s), a Fortran code of “three-way valve with actuator” from TRNLIB was modified and adapted to TRNSYS 18. The model with solar thermal collectors connected to the district heating system was developed and tested by using data about the heat demand, supply/return temperature and pressure fluctuations from the district heating system.

Keywords
solar thermal collectors, district heating system, control accuracy

Bogdanovičs, R., Zeiza-Seļezņova, A., Zemītis, J., Zajacs, A. TRNSYS Model with 3-Way Valve for Heat Carrier Temperature Control of Solar Thermal Collectors Integrated into District Heating System. In: BuildSim-Nordic 2022: Technical Papers, Denmark, Copenhagen, 22-23 August, 2022. Copenhagen: E3S Conference Series, 2022, pp.7-10.

Publication language
English (en)