Influence of building heat distribution temperatures on the energy performance and sizing of 5th generation district heating and cooling networks
| Autor: | Alessandro Maccarini, Artem Sotnikov, Tobias Sommer, Michael Wetter, Matthias Sulzer, Alireza Afshari |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
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| Zdroj: | Maccarini, A, Sotnikov, A, Sommer, T, Wetter, M, Sulzer, M & Afshari, A 2023, ' Influence of building heat distribution temperatures on the energy performance and sizing of 5th generation district heating and cooling networks ', Energy, vol. 275, 127457 . https://doi.org/10.1016/j.energy.2023.127457 Maccarini, A, Sotnikov, A, Sommer, T, Wetter, M, Sulzer, M & Afshari, A 2023, ' Influence of building heat distribution temperatures on the energy performance and sizing of 5th generation district heating and cooling networks ', Energy . |
| DOI: | 10.1016/j.energy.2023.127457 |
| Popis: | This paper investigates the energy performance and sizing criteria of 5th generation district heating and cooling (5GDHC) networks as a function of the heat distribution temperature in the building systems connected to the district network. An energy simulation model of a 5GDHC network was developed in Modelica for a case study located in Denmark. Calculations were carried out for four different building heating systems. Simulation results show that reducing the heat distribution temperatures from 70 ◦C to 23 ◦C leads to around 40% annual electric energy savings (from 10.4 kWh/m2 to 6.2 kWh/m2) for the operation of the heat pumps. Heat distribution temperatures of 23 ◦C cause higher water mass flow rates through the network, leading to annual electric energy consumption for the circulation pumps that are almost doubled (from 0.16 kWh/m2 to 0.3 kWh/m2) compared to the reference case at 70 ◦C. Furthermore, the paper discusses how the results obtained from the Danish case study can be generalized and applied to other cases using a simplified mathematical approach. It is found that about 1.5% of electric energy savings can be achieved for each temperature degree reduction in the heat distribution system. |
| Databáze: | OpenAIRE |
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