Co-Simulation of Geothermal Applications and HVAC Systems

Welsch, Bastian; Rühaak, W.; Schulte, Daniel O.; Formhals, Julian; Bär, Kristian; Sass, Ingo

doi:10.1016/j.egypro.2017.08.040

Cited by 7 publications

(1 citation statement)

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“…An efficient implementation of this concept requires more detailed assessments and system design from technical, economic and environmental points of view. A BTES should not be regarded in isolation, but merely as one component within a district heating and cooling network [8,16,17]. Therefore, a method needs to be selected that evaluates the optimal integration of BTES systems into DHC grids considering their interaction with other components.…”

Section: Introductionmentioning

confidence: 99%

Optimized Layouts of Borehole Thermal Energy Storage Systems in 4th Generation Grids

et al. 2020

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Borehole thermal energy storage (BTES) systems are a viable option to meet the increasing cooling demand and to increase the sustainability of low-temperature district heating and cooling (DHC) grids. They are able to store the rejected heat of cooling cycles on a seasonal basis and deliver this heat during the heating season. However, their efficient practical implementation requires a thorough analysis from technical, economic and environmental points of view. In this comparative study, a dynamic exergoeconomic assessment is adopted to evaluate various options for integrating such a storage system into 4th generation DHC grids in heating dominated regions. For this purpose, different layouts are modeled and parameterized. Multi-objective optimization is conducted, varying the most important design variables in order to maximize exergetic efficiency and to minimize levelized cost of energy (LCOE). A comparison of the optimal designs of the different layouts reveals that passive cooling together with maximizing the heating temperature shift, accomplished by a heat pump, lead to optimal designs. Component-wise exergy and cost analysis of the most efficient designs highlights that heat pumps are responsible for the highest share in inefficiency while the installation of BTES has a high impact in the LCOE. BTES and buffer storage tanks have the lowest exergy destruction for all layouts and increasing the BTES volume results in more efficient DHC grids.

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Section: Introductionmentioning

confidence: 99%

Optimized Layouts of Borehole Thermal Energy Storage Systems in 4th Generation Grids

et al. 2020

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Einführung in das Verbundvorhaben Easyquart

Bucher,

Görke,

Grimm

et al. 2023

EASyQuart - Energieeffiziente Auslegung Und Planung Dezentraler Versorgungsnetze Von Stadtquartieren

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ZusammenfassungIm Jahre 2015 wohnten etwa 75 % der deutschen Bevölkerung in Städten (Statista 2018). Entsprechend dem Ziel des Energiekonzepts der Bundesregierung (Bundesregierung 2018), den Gebäudebestandteil bis 2050 nahezu klimaneutral zu gestalten, spielen städtische Quartiere eine herausragende Rolle bei der Steigerung von Energieeffizienz und somit der Senkung von Schadstoffemissionen. Laut Angaben des Umweltbundesamtes betrug der Anteil von Wärme/Kälte im Jahr 2012 knapp 51 % am Endenergieverbrauch in Deutschland. In privaten Haushalten ist der thermische Anteil mit bis zu 80 % gemessen am Verbrauch von Endenergie noch deutlich größer. Davon stammten 2016 lediglich 13,4 % aus erneuerbaren Quellen (Bundesministerium für Wirtschaft und Klimaschutz 2022), mit einem seit 2012 nahezu stagnierenden Anteil. Diese Zahlen verdeutlichen das große Effizienzpotenzial von Stadtquartieren im Wärmesektor und deren Schlüsselrolle im Prozess der Energiewende.

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