scholarly journals Operation of Looped District Heating Networks

2017 ◽  
Vol 61 (2) ◽  
pp. 79
Author(s):  
László Garbai ◽  
Andor Jasper
Keyword(s):  
Flow Pattern ◽  
District Heating ◽  
Optimal Operation ◽  
The Other ◽  
Objective Functions ◽  
End Point ◽  
Conduit System ◽  
Heating Networks

The study presents a methodology for the optimal operation of district heating networks with a circular conduit system. The authors discuss this this topic in an absolutely general form. By a special statement and solution of Kirchhoff Laws, node equations and loop equations, the hydraulic end point of the circle is determined, including the supply ratio of the consumer located at the hydraulic end point. Two objective functions are stated by the authors; one of them for the minimum of flow work, and the other for the minimum of power supplied. It is demonstrated that the objective functions yield different results. Theoretically more economical operation is ensured by the flow pattern resulting from the minimization of the power supplied.

scholarly journals Optimal operation of large district heating networks through fast fluid-dynamic simulation

Energy ◽  
2016 ◽  
Vol 102 ◽  
pp. 586-595 ◽  
Author(s):  
Elisa Guelpa ◽  
Claudia Toro ◽  
Adriano Sciacovelli ◽  
Roberto Melli ◽  
Enrico Sciubba ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Fluid Dynamic ◽  
District Heating ◽  
Optimal Operation ◽  
Heating Networks

scholarly journals Evaluating the impact of multi-carrier energy storage systems in optimal operation of integrated electricity, gas and district heating networks

2020 ◽  
Vol 176 ◽  
pp. 115413 ◽  
Author(s):  
Mohammad Amin Mirzaei ◽  
Morteza Nazari-Heris ◽  
Kazem Zare ◽  
Behnam Mohammadi-Ivatloo ◽  
Mousa Marzband ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage Systems ◽  
District Heating ◽  
Optimal Operation ◽  
Energy Storage Systems ◽  
Carrier Energy ◽  
The Impact ◽  
Heating Networks

scholarly journals Optimal operation of district heating networks through demand response

2019 ◽  
Vol 22 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Vittorio Verda ◽  
Martina Capone ◽  
Elisa Guelpa
Keyword(s):  
Demand Response ◽  
District Heating ◽  
Optimal Operation ◽  
Heating Networks

scholarly journals RELaTED Project: New Developments on Ultra-Low Temperature District Heating Networks

Proceedings ◽  
2020 ◽  
Vol 65 (1) ◽  
pp. 25
Author(s):  
Antonio Garrido Marijuan ◽  
Roberto Garay ◽  
Mikel Lumbreras ◽  
Víctor Sánchez ◽  
Olga Macias ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Waste Heat ◽  
District Heating ◽  
Hot Water ◽  
Thermal Systems ◽  
Heating Source ◽  
Wide Range ◽  
Thermal Sources ◽  
Heating Networks

District heating networks deliver around 13% of the heating energy in the EU, being considered as a key element of the progressive decarbonization of Europe. The H2020 REnewable Low TEmperature District project (RELaTED) seeks to contribute to the energy decarbonization of these infrastructures through the development and demonstration of the following concepts: reduction in network temperature down to 50 °C, integration of renewable energies and waste heat sources with a novel substation concept, and improvement on building-integrated solar thermal systems. The coupling of renewable thermal sources with ultra-low temperature district heating (DH) allows for a bidirectional energy flow, using the DH as both thermal storage in periods of production surplus and a back-up heating source during consumption peaks. The ultra-low temperature enables the integration of a wide range of energy sources such as waste heat from industry. Furthermore, RELaTED also develops concepts concerning district heating-connected reversible heat pump systems that allow to reach adequate thermal levels for domestic hot water as well as the use of the network for district cooling with high performance. These developments will be demonstrated in four locations: Estonia, Serbia, Denmark, and Spain.

State estimation models of district heating networks for integrated energy system considering incomplete measurements

2021 ◽  
Vol 282 ◽  
pp. 116105
Author(s):  
Suhan Zhang ◽  
Wei Gu ◽  
Haifeng Qiu ◽  
Shuai Yao ◽  
Guangsheng Pan ◽  
...  
Keyword(s):  
State Estimation ◽  
District Heating ◽  
Energy System ◽  
Integrated Energy System ◽  
Heating Networks ◽  
Estimation Models

scholarly journals Intramax and other objective functions: The case of Slovenia

2016 ◽  
Vol 24 (2) ◽  
pp. 12-25 ◽  
Author(s):  
Samo Drobne ◽  
Mitja Lakner
Keyword(s):  
Objective Function ◽  
The Other ◽  
Objective Functions ◽  
Interaction Index ◽  
Functional Regions ◽  
Hierarchical Aggregation ◽  
Administrative Units

Abstract The use of different objective functions in hierarchical aggregation procedures is examined in this paper. Specifically, we analyse the use of the original Intramax objective function, the sum-of-flows objective function, the sum-of-proportions-to-intra-regional-flows objective function, Smart’s weighted interaction index, the first and second CURDS weighted interaction indices, and Tolbert and Killian’s interaction index. The results of the functional regionalisation have been evaluated by self-containment statistics, and they show that the use of the original Intramax procedure tends to delineate operationally the most persuasive and balanced regions that, regarding the intra-regional flows, homogeneously cover the analysed territory. The other objective functions give statistically better but operationally less suitable results. Functional regions modelled using the original Intramax procedure were compared to the regions at NUTS 2 and NUTS 3 levels, as well as to administrative units in Slovenia. We conclude that there are some promising directions for further research on functional regionalisation using hierarchical aggregation procedures.

Sign in / Sign up

Export Citation Format

Share Document