TY - GEN
T1 - A Nonlinear Optimization Method for the Topological Design of District Heating Systems
AU - Lambert, Jerry
AU - Herrmann, Stephan
AU - Spliethoff, Hartmut
N1 - Publisher Copyright:
© Proceedings of ECOS 2022 - 35th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems.
PY - 2022
Y1 - 2022
N2 - In this paper, a method is presented to find optimal topology, pipe sizing, and operational parameters of a district heating system. The current high costs of district heating systems set limits for building new networks regarding the minimum heat demand density. Potential for cost reduction is offered by optimized routing with ideal pipe sizing as well as optimal operating parameters. Nonlinear optimization approaches with a simultaneous calculation of these parameters are limited to a small district heating network with few customers due to scaling computational costs. Therefore, to reduce the computational cost scaling with bigger district heating systems, the optimization problem is subdivided into two iterative subproblems. First, an initial sizing of the district heating pipes is assumed. Second, optimal hydraulic parameters and optimal pipe sizing are determined. In the subsequent optimization, the corresponding thermal solution is calculated. The solution of these two subproblems is iterated until the network converges to an optimal solution. As a proof of concept, a small-scale district heating system is optimized. With this small-scale example the correct functioning of the proposed iterative algorithm is intuitively shown.
AB - In this paper, a method is presented to find optimal topology, pipe sizing, and operational parameters of a district heating system. The current high costs of district heating systems set limits for building new networks regarding the minimum heat demand density. Potential for cost reduction is offered by optimized routing with ideal pipe sizing as well as optimal operating parameters. Nonlinear optimization approaches with a simultaneous calculation of these parameters are limited to a small district heating network with few customers due to scaling computational costs. Therefore, to reduce the computational cost scaling with bigger district heating systems, the optimization problem is subdivided into two iterative subproblems. First, an initial sizing of the district heating pipes is assumed. Second, optimal hydraulic parameters and optimal pipe sizing are determined. In the subsequent optimization, the corresponding thermal solution is calculated. The solution of these two subproblems is iterated until the network converges to an optimal solution. As a proof of concept, a small-scale district heating system is optimized. With this small-scale example the correct functioning of the proposed iterative algorithm is intuitively shown.
KW - District Heating
KW - Energy System
KW - Nonlinear Optimization
KW - Topology Optimization
UR - http://www.scopus.com/inward/record.url?scp=85195800280&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85195800280
T3 - Proceedings of ECOS 2022 - 35th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
SP - 813
EP - 823
BT - Proceedings of ECOS 2022 - 35th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
A2 - Elmegaard, Brian
A2 - Sciubba, Enrico
A2 - Blanco-Marigorta, Ana Maria
A2 - Jensen, Jonas Kjaer
A2 - Markussen, Wiebke Brix
A2 - Meesenburg, Wiebke
A2 - Arjomand Kermani, Nasrin
A2 - Zhu, Tingting
A2 - Kofler, Rene
PB - DTU Construct
T2 - 35th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2022
Y2 - 3 July 2022 through 7 July 2022
ER -