The Potential of Small Wind Turbine Integration in Residential Buildings Complementing Pv Heat Pump Operation

Brennenstuhl, Marcus; Stuttgart, DE Hft

doi:10.32638/proceedings.isec2018.201846

Cited by 3 publications

(4 citation statements)

References 41 publications

(14 reference statements)

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“…This can be partially counteracted by mounting small wind turbines on top of tall buildings. Due to seasonal differences, especially in combination with heat pumps, small wind turbines can complement or be an alternative to PV systems (Brennenstuhl et al, 2018). Also the increasing demand of e-mobility has to be considered in this context.…”

Section: General Conditionsmentioning

confidence: 99%

CFD Simulation and Visualization Based Investigation of Small Wind Turbine Potential: A Case Study “Neuer Stöckach” for Stuttgart

Brennenstuhl

Gruen

Harbola

et al. 2021

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. In the face of climate change and the energy transition that the German federal government is aiming for, all renewable energy potentials need to be tapped. Unfortunately, small wind turbines play a niche role in Germany and most other countries despite the fact, that although they offer advantages as e.g. almost seasonal independent energy production in close proximity to the consumer on the same low-voltage grid level. One reason beside the lower wind speeds that can be expected closer to the ground is, that in comparison to PV (photovoltaic), for which good yield forecasts can be made using global radiation measurements from nearby weather stations or online databases, the yield of small wind turbines, especially in urban areas, can only be forecasted using on-site measurements due to the influence of the surrounding buildings and topography. This method is time-consuming and costly. To address this, within this work a Computational Fluid Dynamics (CFD) simulation based visualization framework for the investigation of the small wind turbine potential is presented. In this specific case the energy supply company EnBW is planning to refurbish the “Neuer Stöckach” urban quarter on the former “Stöckach” company site. As part of the redevelopment, a comprehensive energy concept is planned to integrate renewable energies. In this context the integration of small wind turbines into the energy concept is examined according to this new methodology.

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Section: General Conditionsmentioning

confidence: 99%

CFD Simulation and Visualization Based Investigation of Small Wind Turbine Potential: A Case Study “Neuer Stöckach” for Stuttgart

Brennenstuhl

Gruen

Harbola

et al. 2021

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…On the balance sheet, it can be seen that the PV production of November, December, and January is not high enough to fit to the heat pump. To solve this problem, a seasonal electrical storage system as described for the case of Wüstenrot in [26] or bigger PV systems is needed. Half of the year, the whole household's electricity demand can be capped with PV on the balance sheet.…”

Section: Pv Systemmentioning

confidence: 99%

“…The economic feasibility is calculated in terms of EAC (equivalent annual cost), which represents the annual cost of owning, operating, and maintaining the different system components. The EAC are calculated by Equation (1): Six of the buildings are equipped with battery storages of 5 kWh capacity, increasing self-consumption by about 20% [26,27]. Regarding the fact that the electricity price for residential users in Germany is around 0.29 € and the feed in tariff is approximately 0.11 €, this becomes increasingly important.…”

Section: Economical Assessmentmentioning

confidence: 99%

Report on a Plus-Energy District with Low-Temperature DHC Network, Novel Agrothermal Heat Source, and Applied Demand Response

et al. 2019

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District heating and cooling networks can pose the possibility of including a variety of renewable energy sources as well as waste heat into a district’s heat supply concept. Unfortunately, low demand densities as they increasingly occur through higher building energy standards and in rural areas render conventional heating and cooling networks inefficient. At the same time, power-to-heat is becoming more and more important to make use of a larger amount of renewable energy sources on the electrical side by providing more flexibility by means of demand response and demand-side management. Within this work, a rural Plus-Energy settlement is presented addressing those topics by a low-temperature district heating and cooling network connected to a novel agrothermal collector supplying 23 residential buildings with decentralized heat pumps and PV systems. The collector, the network, and six of the buildings are equipped with comprehensive monitoring equipment. Within those buildings, forecast and optimization algorithms are implemented to adapt their heat pump operation to enable an increase of self-consumption, to include flexible electricity tariffs, and also to participate in power markets. Thereby, for the low-temperature district heating and cooling network, it has been shown that the concept can operate in the future at competitive heat costs. On the building level, up to 50% of cost savings could be achieved under ideal conditions with the optimization of the self-consumption of PV electricity. However, to ensure optimal results, the individual system components have to be dimensioned for this task.

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“…This is unfortunate as cost-saving opportunities exist, particularly for small-scale installations where shared fixed installation costs could be advantageous [4]. Also, due to their different generation profiles, wind power and PV have shown to complement each other [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Optimized Dimensioning and Economic Assessment of Decentralized Hybrid Small Wind and PV Power Systems for Residential Buildings

Brennenstuhl,

Otto,

Schembera

et al. 2023

Preprint

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In Germany, renewable energy sources play a crucial role in electricity generation, with wind and photovoltaic (PV) leading the way. In 2022, large wind turbines contributed 24.1% of the electricity generated, while PV accounted for 10.6%. Contrary, small wind power holds a marginal share of less than 0.01%. This is unfortunate as the decentralized nature of small wind power at low-voltage grid level offers benefits like reducing the need for grid expansion or infrastructure upgrades. Although small wind power currently suits locations with favorable wind potential, changing factors such as rising electricity prices, falling battery storage costs, and growing electrification in heating and transport could create new opportunities. Within this work a residential energy supply system consisting of small wind turbine, PV, heat pump, battery storage, and electric vehicle was dimensioned for different sites in Germany and Canada based on detailed simulation models and genetic algorithms. This was carried out for various economic framework conditions. Results indicate that with electricity purchase costs above 0.42 €/kWh, combined with a 25% reduction in small wind turbine and battery storage investment expenses, economic viability could be significantly enhanced. This might expand the applicability of small wind power to diverse sites.

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The Potential of Small Wind Turbine Integration in Residential Buildings Complementing Pv Heat Pump Operation

Cited by 3 publications

References 41 publications

CFD Simulation and Visualization Based Investigation of Small Wind Turbine Potential: A Case Study “Neuer Stöckach” for Stuttgart

CFD Simulation and Visualization Based Investigation of Small Wind Turbine Potential: A Case Study “Neuer Stöckach” for Stuttgart

Report on a Plus-Energy District with Low-Temperature DHC Network, Novel Agrothermal Heat Source, and Applied Demand Response

Optimized Dimensioning and Economic Assessment of Decentralized Hybrid Small Wind and PV Power Systems for Residential Buildings

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