Title:
Bioenergy Integration and Optimisation by Thermal Network Analysis (THENA)
Author(s):
Nussbaumer, T., Thalmann, S.
Document(s):
Paper
Abstract:
Thermal networks allow the use of biomass to supply buildings and industry with thermal energy at high comfort and with low air pollution. The paper describes the Excel based tool “THENA” which enables a fast evaluation of the layout of a district heating (DH) networks with an assessment of the the pressure drop and the pipe dimensioning and an economic evaluation. In addition, parameter variations can be performed and the effect of non-idealities such as over-dimensioning of pipe diameters and too small temperature spreads caused by inappropriate design or operation of substations can be identified. Beside this, two concepts to optimise thermal networks are presented based on case-studies for existing DH networks. One example shows that the implementation of a thermal energy storage (TES) enables to ascertain a defined supply security with a reduced boiler capacity and that the total cost can be minimised by a heat storage of 2 h to 3 h of nominal load operation. For another network, the introduction of a time-shift of the heat supply to buildings with floor heating is investigated and reveals that heat demand peaks can be reduced and this peak shaving enables to increase the heat load by 11 % and to potentially increase the revenues correspondingly.
Keywords:
district heating, heat storage, thermal network, thermal energy storage, peak shaving
Topic:
Bioenergy Integration in Energy Systems
Subtopic:
Strategies for bioenergy integration into energy systems
Event:
26th European Biomass Conference and Exhibition
Session:
5BO.4.4
Pages:
1474 - 1481
ISBN:
978-88-89407-18-9
Paper DOI:
10.5071/26thEUBCE2018-5BO.4.4
Price:
FREE
