Fortschritte beim Wärmeschutz der Wohngebäude

Diefenbach, Nikolaus; Cischinsky, Holger; Rodenfels, Markus; Clausnitzer, Klaus-Dieter

doi:10.14512/oew.v27i1.1175

Cited by 9 publications

(14 citation statements)

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“…The demand for retrofit in the residential sector has increased due to the establishment of massive public support programs and the age structure of the German housing stock, since 75% of the residential houses were built before the first German law of 1977 requiring a mandatory thermal insulation and by now require retrofit due to a renovation cycle of 30-50 years (Diefenbach et al, 2010). Thus, the processes of acquiring and implementing knowledge in EEC companies often rely on political decisions regarding the specific design of retrofit subsidies.…”

Section: Signaling Of Knowledge and Qualitymentioning

confidence: 99%

Asymmetric information as a barrier to knowledge spillovers in expert markets

Feser

Proeger

2016

Int Entrep Manag J

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Abstract: This paper investigates barriers to effective knowledge spillovers for markets in which the product can be characterized as a credence good, i.e. its complexity impedes the evaluation of quality by customers both ex-ante and ex-post. We focus on the German market for energy efficiency consultants, as an emerging and subsidized sector in which the service offered has strong credence good properties. Based upon in-depth interviews with stakeholders, we analyze the determinants and barriers to knowledge spillovers. We find that the incentive to foster spillovers to increase suppliers' knowledge is limited by the difficult commercialization of additional capabilities. The implementation of a public certification scheme has failed to increase the sectoral knowledge spillovers. By contrast, the participation in formal knowledge networks has been more effective in prompting companies to foster knowledge spillovers, which has also led to a higher degree of specialization. We conclude that access to certification schemes should be further restricted to increase market transparency and private networks should be supported to achieve the aim of increasing knowledge spillovers. Terms of use: Documents in

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Section: Signaling Of Knowledge and Qualitymentioning

confidence: 99%

Asymmetric information as a barrier to knowledge spillovers in expert markets

Feser

Proeger

2016

Int Entrep Manag J

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“…In Germany, 82.8 million people [20] live with 41.51 million cars [21]. Considering only people not living in cities (71% of the total inhabitants [22], owning 78.2% of all vehicles [21]) and assuming two inhabitants per household [23] and 1.3 households per house [24], a total conversion from fossil fuel based vehicles to EV would lead to 1.42 EVs per grid connection point.…”

Section: Ev Chargingmentioning

confidence: 99%

“…For the households in the grid, a yearly energy consumption of 3216 kWh [28] was assumed. Additionally, it was assumed that 1.3 households were connected to each grid connection point [24] and the profiles were scaled accordingly. As the next steps, all profiles for the regarded grid or feeder are added up to calculate the total consumption profile P Household,Profile .…”

Section: Energy Consumption Of Householdsmentioning

confidence: 99%

The Influence of Electric Vehicle Charging on Low Voltage Grids with Characteristics Typical for Germany

Held¹,

Märtz²,

Krohn³

et al. 2019

WEVJ

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The increasing number of electric vehicles poses new challenges to the power grid. Their charging process stresses the power system, as additional energy has to be supplied, especially during peak load periods. This additional load can result in critical network situations depending on various parameters. These impacts may vary based on market penetration, the energy demand, the plug-in time, the charging rate, and the grid topology and the associated operational equipment. Hence, the impact of electric vehicles (EVs) on the power grid was analysed for twelve typical German low voltage grids by applying power flow calculations. One main result was that thermal and voltage-related network overloads were highly dependent on market penetration and grid topology.

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“…The Institute for Housing and Environment (IWU) developed a comprehensive topology of the German building stock [24,25]. The Baden-Wuerttemberg State Institute for the Environment (LUBW) used these data to regionalise the heat demand of the German State Baden-Wuerttemberg to its associated administrative districts [20], taking into account multiple building properties that influence the heat demand: the floor area, year of construction and building type.…”

Section: Introductionmentioning

confidence: 99%

Regionalised heat demand and power-to-heat capacities in Germany – An open dataset for assessing renewable energy integration

Heitkoetter¹,

Medjroubi²,

Vogt³

et al. 2020

Applied Energy

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Higher shares of fluctuating generation from renewable energy sources (RES) in the power system lead to an increase of grid balancing demand. One approach for avoiding RES curtailment, is to use excess electricity feed-in for heating applications. To assess in which regions power-to-heat (PtH) technologies can contribute to RES integration, detailed data on the spatial distribution of the heat demand are needed. In this contribution, we determine the overall heat load in the residential building sector and the share covered by electric heating technologies for each administrative district (NUTS-3) in Germany, with a temporal resolution of 15 minutes. For the detailed regionalisation of the residential building stock, we ordered a special evaluation of the German census data at the Research Data Centre with a combination of six building features. Using these data, 729 building categories were defined and heat demand values were assigned to each category. Furthermore, heating types and different classes of installed heating capacity were defined. Our analysis showed that the share of small scale single-storey heatings and large scale central heatings is higher in cities, whereas there are more medium scale central heatings in rural areas. Both is caused by the different shares of single and multi-family houses in the respective regions. To determine the electrically covered heat demand, we took into account heat pumps and resistive heating technologies. All results, as well as the developed code are published along with this contribution under open source licenses and can thus also be used by other researchers for the assessment of power-to-heat for RES integration.

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Fortschritte beim Wärmeschutz der Wohngebäude

Abstract: Durch eine repräsentative Befragung von Hauseigentümern wurden Daten zum energetischen Zustand der deutschen Wohngebäude erhoben. Diese zeigen, dass höhere Modernisierungsraten beim Wärmeschutz notwendig sind, um die Klimaschutzziele zu erreichen.

Cited by 9 publications

References 0 publications

Asymmetric information as a barrier to knowledge spillovers in expert markets

Asymmetric information as a barrier to knowledge spillovers in expert markets

The Influence of Electric Vehicle Charging on Low Voltage Grids with Characteristics Typical for Germany

Regionalised heat demand and power-to-heat capacities in Germany – An open dataset for assessing renewable energy integration

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