ORCID Profile
0000-0002-3210-6200
Current Organisations
Fraunhofer-Einrichtung für Energieinfrastrukturen und Geothermie IEG
,
Fraunhofer-Institut für Energiewirtschaft und Energiesystemtechnik
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Publications
Discovery of hard-spectrumγ-ray emission from the BL Lacertae object 1ES 0414+009
Publisher: EDP Sciences
Date: 02-2012
Photometric multi-site campaign on the open cluster NGC 884
Publisher: EDP Sciences
Date: 06-2010
Analysis of Dependencies between Gas and Electricity Distribution Grid Planning and Building Energy Retrofit Decisions
Publisher: MDPI AG
Date: 07-2020
DOI: 10.3390/SU12135315
Abstract: Most macroeconomic studies predict a decline in final energy demand and the use of natural gas in the heating sector in Europe. In the course of building retrofitting, gas-based heating systems are predominantly replaced by electricity-based solutions. This influences the business models of electricity and especially gas distribution network operators (DNOs), where grid charges tend to rise. The resulting feedback effect could accelerate the decrease of demand and finally lead to the defection of the gas grid—an effect that has been neglected in energy system analysis so far. We present a multi-agent simulation with a rule-based gas and electricity DNO model and a building retrofit optimization model to analyze these interdependencies during the transformation path, focusing on the role of different technical, economic, and regulatory triggers. Our case studies for a real grid area of a German city shows that an interplay of the gas and electricity DNO’s strategy, as well as the building-, heating system-, grid-, and trigger-configuration, determine the decision on the extension, continuation, or defection of the gas grid infrastructure. Finally, strategies for how to reduce the risk of a gas grid defection, which are relevant for DNOs, policy makers, and creators of macro-economic models, are discussed.
ERRATUM: “SEARCH FOR DARK MATTER ANNIHILATION SIGNALS FROM THE FORNAX GALAXY CLUSTER WITH H.E.S.S.” (2012, ApJ, 750, 123)
Publisher: American Astronomical Society
Date: 13-02-2014
H.E.S.S. observations of the Crab during its March 2013 GeV gamma-ray flare
Publisher: EDP Sciences
Date: 02-2014
H.E.S.S. constraints on dark matter annihilations towards the sculptor and carina dwarf galaxies
Publisher: Elsevier BV
Date: 03-2011
Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S.
Publisher: American Physical Society (APS)
Date: 22-01-2013
Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for ground-based high-energy gamma-ray astronomy
Publisher: Springer Science and Business Media LLC
Date: 23-11-2011
PKS 2005-489 at VHE: four years of monitoring with HESS and simultaneous multi-wavelength observations
Publisher: EDP Sciences
Date: 02-2010
SEARCH FOR DARK MATTER ANNIHILATION SIGNALS FROM THE FORNAX GALAXY CLUSTER WITH H.E.S.S.
Publisher: American Astronomical Society
Date: 24-04-2012
Commissioning and first tests of the MAGIC telescope
Publisher: Elsevier BV
Date: 02-2004
pandapipes: an Open Source Piping Grid Calculation Package for the Application in Coupled Multi-Energy Grid Simulations
Publisher: MDPI AG
Date: 06-10-2020
DOI: 10.20944/PREPRINTS202010.0132.V1
Abstract: The increasing complexity of the design and operation evaluation process of multi-energy grids (MEGs) requires tools for the coupled simulation of power, gas and district heating grids. Most tools analyzed in this paper either do not allow coupling of infrastructures, simplify the grid model or are not publicly available. We introduce the open source piping grid simulation tool pandapipes that – in interaction with pandapower - fulfills three crucial criteria: clear data structure, adaptable MEG model setup and performance. In an introduction to pandapipes we illustrate how it fulfills these criteria through its internal structure and demonstrate how it performs in comparison to STANET®. Then we show two case studies that have been performed with pandapipes already. The first case study demonstrates a peak shaving strategy as interaction of a local electricity and district heating grid in a small settlement. The second case study analyzes the potential of a power-to-gas device to serve as flexibility in a power grid under consideration of gas grid constraints. They both show the importance of a clear database, a simple simulation setup and good performance to set up different large and complex studies on grid infrastructure design and operation.
Discovery of TeVγ-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
Publisher: EDP Sciences
Date: 04-2013
Search for extendedγ-ray emission around AGN with H.E.S.S. andFermi-LAT
Publisher: EDP Sciences
Date: 02-2014
Identification of HESS J1303−631 as a pulsar wind nebula throughγ-ray, X-ray, and radio observations
Publisher: EDP Sciences
Date: 19-11-2012
VHEγ-ray emission of PKS 2155–304: spectral and temporal variability
Publisher: EDP Sciences
Date: 09-2010
BL Lacertae contribution to the extragalactic gamma-ray background
Publisher: EDP Sciences
Date: 12-11-2008
Multi-wavelength observations of H 2356–309
Publisher: EDP Sciences
Date: 06-2010
First stars and the extragalactic background light: How recent γ-ray observations constrain the early universe
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3076715
A multiwavelength view of the flaring state of PKS 2155-304 in 2006
Publisher: EDP Sciences
Date: 03-2012
HESS J1818–154, a new composite supernova remnant discovered in TeV gamma rays and X-rays
Publisher: EDP Sciences
Date: 02-2014
TeV -ray observations of the young synchrotron-dominated SNRs G1.9+0.3 and G330.2+1.0 with H.E.S.S.
Publisher: Oxford University Press (OUP)
Date: 02-05-2014
DOI: 10.1093/MNRAS/STU459
Revisiting the Westerlund 2 field with the HESS telescope array
Publisher: EDP Sciences
Date: 30-11-2010
HESS J1640-465 - an exceptionally luminous TeV -ray supernova remnant
Publisher: Oxford University Press (OUP)
Date: 11-02-2014
DOI: 10.1093/MNRAS/STU139
A strict lower-limit EBL applications on gamma-ray absorption
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3076751
Very high energy γ-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron
Publisher: EDP Sciences
Date: 03-09-2009
HESS upper limits on very high energy gamma-ray emission from the microquasar GRS 1915+105
Publisher: EDP Sciences
Date: 04-11-2009
Voltage control using PV storage systems in distribution systems
Publisher: Institution of Engineering and Technology
Date: 2013
DOI: 10.1049/CP.2013.1217
A new SNR with TeV shell-type morphology: HESS J1731-347
Publisher: EDP Sciences
Date: 16-06-2011
Constraints on the gamma-ray emission from the cluster-scale AGN outburst in the Hydra A galaxy cluster
Publisher: EDP Sciences
Date: 09-2012
On the primary energy distribution and the EBL limits from TeV Blazars
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3076719
Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS J1018–589
Publisher: EDP Sciences
Date: 18-04-2012
Kiloparsec-scale jets in FR I radio galaxies and the γ-ray background
Publisher: American Astronomical Society
Date: 02-2006
DOI: 10.1086/498084
HESS and Fermi-LAT discovery of γ-rays from the blazar 1ES 1312−423
Publisher: Oxford University Press (OUP)
Date: 08-2013
Search for very-high-energyγ-ray emission from Galactic globular clusters with H.E.S.S.
Publisher: EDP Sciences
Date: 13-02-2013
Can the extragalactic gamma-ray background be explained by AGN?
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3076721
Erratum: HESS J1640-465 - an exceptionally luminous TeV -ray supernova remnant
Publisher: Oxford University Press (OUP)
Date: 03-06-2014
DOI: 10.1093/MNRAS/STU826
Detection of very-high-energyγ-ray emission from the vicinity of PSR B1706–44 and G 343.1–2.3 with H.E.S.S.
Publisher: EDP Sciences
Date: 17-03-2011
Reducing CO2 Emissions for PV-CHP Hybrid Systems by Using a Hierarchical Control Algorithm
Publisher: MDPI AG
Date: 25-08-2023
DOI: 10.3390/EN16176176
Abstract: National targets for CO2 reduction in the German building sector have stagnated due to low refurbishment rates. This paper proposes an alternative approach using highly efficient, decentralized energy systems. By combining photovoltaic (PV) systems and combined heat and power (CHP) plants controlled by a modified hierarchical control algorithm, CO2 emissions can be reduced. Results from a single-family home show a 13% CO2 reduction with only 11% higher operational costs on heating days. On summer days, up to 50% CO2 emissions can be avoided without additional costs. The control algorithm easily adapts to changing input parameters, making it suitable for different countries and business cases. Overall, with its modified control, the PV-CHP hybrid system can effectively reduce CO2 emissions and adapt to varying conditions. The control can be easily used for other energy systems, like fuel cells or heat pumps.
H.E.S.S. discovery of VHEγ-rays from the quasar PKS 1510−089
Publisher: EDP Sciences
Date: 06-2013
Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622
Publisher: EDP Sciences
Date: 30-11-2010
A new combined control algorithm for PV-CHP hybrid systems
Publisher: Elsevier BV
Date: 2018
Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S.
Publisher: EDP Sciences
Date: 23-04-2014
Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406
Publisher: EDP Sciences
Date: 06-2013
Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S.
Publisher: EDP Sciences
Date: 15-01-2013
Detection of gamma rays from a starburst galaxy
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-11-2009
Abstract: Cosmic rays are thought to be accelerated in the shock waves produced by supernova explosions and can generate gamma rays when they interact with interstellar particles and radiation. Starburst galaxies, with their increased star formation rates, increased stellar explosion rates, and high densities of gas and radiation fields, are considered to be promising sources of gamma-ray emission. Using the High Energy Stereoscopic System (H.E.S.S) array of telescopes, Acero et al. (p. 1080 , published online 24 September) report the detection of gamma rays from one of the closest starburst galaxies, NGC 253. NGC 253 is a spiral galaxy, similar to our own Galaxy, except that its nucleus is undergoing an episode of intense star formation. The H.E.S.S. findings confirm that cosmic-ray acceleration is indeed efficient in starburst galaxies and open up new ways to understand cosmic-ray acceleration.
Discovery of the VHE gamma-ray source HESS J1832-093 in the vicinity of SNR G22.7-0.2
Publisher: Oxford University Press (OUP)
Date: 18-11-2014
Simultaneous multiwavelength observations of the second exceptional γ-ray flare of PKS 2155-304 in July 2006
Publisher: EDP Sciences
Date: 15-06-2009
The ground-based large-area wide-angle γ-ray and cosmic-ray experiment HiSCORE
Publisher: Elsevier BV
Date: 12-2011
DARK MATTER POWERED STARS: CONSTRAINTS FROM THE EXTRAGALACTIC BACKGROUND LIGHT
Publisher: American Astronomical Society
Date: 16-01-2012
Discovery of VHEγ-rays from the BL Lacertae object PKS 0548–322
Publisher: EDP Sciences
Date: 10-2010
Discovery of VHEγ-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9 − 311909
Publisher: EDP Sciences
Date: 06-2012
Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
Publisher: EDP Sciences
Date: 07-2011
HESS observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae
Publisher: Oxford University Press (OUP)
Date: 12-06-2012
Constraints on the multi-TeV particle population in the Coma galaxy cluster with HESS observations
Publisher: EDP Sciences
Date: 04-06-2009
BL Lac contribution to the extragalactic gamma-ray background
Publisher: AIP
Date: 2005
DOI: 10.1063/1.1878466
Probing the extent of the non-thermal emission from the Vela X region at TeV energies with H.E.S.S.
Publisher: EDP Sciences
Date: 16-11-2012
SPECTRAL ANALYSIS AND INTERPRETATION OF THE γ-RAY EMISSION FROM THE STARBURST GALAXY NGC 253
Publisher: American Astronomical Society
Date: 13-09-2012
Extragalactic Photon Background above GeV Energies: High Peaked BL Lacertae Objects or Dark Matter?
Publisher: Springer Berlin Heidelberg
Date: 2008
Flux upper limits for 47 AGN observed with H.E.S.S. in 2004−2011
Publisher: EDP Sciences
Date: 28-03-2014
Discovery of extended VHEγ-ray emission from the vicinity of the young massive stellar cluster Westerlund 1
Publisher: EDP Sciences
Date: 2012
Localizing the VHE γ-ray source at the Galactic Centre
Publisher: Oxford University Press (OUP)
Date: 03-2010
Discovery of the source HESS J1356-645 associated with the young and energetic PSR J1357-6429
Publisher: EDP Sciences
Date: 09-2011
Pandapipes: An Open-Source Piping Grid Calculation Package for Multi-Energy Grid Simulations
Publisher: MDPI AG
Date: 26-11-2020
DOI: 10.3390/SU12239899
Abstract: The increasing complexity of the design and operation evaluation process of multi-energy grids (MEGs) requires tools for the coupled simulation of power, gas and district heating grids. In this work, we analyze a number of applicable tools and find that most of them do not allow coupling of infrastructures, oversimplify the grid model or are based on inaccessible source code. We introduce the open source piping grid simulation tool pandapipes that—in interaction with pandapower—addresses three crucial criteria: clear data structure, adaptable MEG model setup and performance. In an introduction to pandapipes, we illustrate how it fulfills these criteria through its internal structure and demonstrate how it performs in comparison to STANET®. Then, we show two case studies that have been performed with pandapipes already. The first case study demonstrates a peak shaving strategy as an interaction of a local electricity and district heating grid in a small neighborhood. The second case study analyzes the potential of a power-to-gas device to provide flexibility in a power grid while considering gas grid constraints. These cases show the importance of performing coupled simulations for the design and analysis of future energy infrastructures, as well as why the software should fulfill the three criteria.
Cost-Benefit Analysis of Battery Storage System for Voltage Compliance in Distribution Grids with High Distributed Generation
Publisher: Elsevier BV
Date: 11-2016
Interdependencies of Infrastructure Investment Decisions in Multi-Energy Systems—A Sensitivity Analysis for Urban Residential Areas
Publisher: MDPI AG
Date: 08-01-2021
DOI: 10.3390/SMARTCITIES4010007
Abstract: Considering the European Union (EU) climate targets, the heating sector should be decarbonized by 80% to 95% up to 2050. Thus, the macro-trends forecast increasing energy efficiency and focus on the use of renewable gas or the electrification of heat generation. This has implications for the business models of urban electricity and in particular natural gas distribution network operators (DNOs): When the energy demand decreases, a disproportionately long grid is operated, which can cause a rise of grid charges and thus the gas price. This creates a situation in which a self-reinforcing feedback loop starts, which increases the risk of gas grid defection. We present a mixed integer linear optimization model to analyze the interdependencies between the electricity and gas DNOs’ and the building owners’ investment decisions during the transformation path. The results of the investigation in a real grid area are used to validate the simulation setup of a sensitivity analysis of 27 types of building collectives and five grid topologies, which provides a systematic insight into the interrelated system. Therefore, it is possible to identify building and grid configurations that increase the risk of a complete gas grid shutdown and those that should be operated as a flexibility option in a future renewable energy system.
Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S.
Publisher: EDP Sciences
Date: 21-10-2009
Photon and neutrino emission from active galactic nuclei
Publisher: Elsevier BV
Date: 08-2011
Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
Publisher: American Association for the Advancement of Science (AAAS)
Date: 27-06-2008
Abstract: The atmospheric Cherenkov gamma-ray telescope MAGIC, designed for a low-energy threshold, has detected very-high-energy gamma rays from a giant flare of the distant Quasi-Stellar Radio Source (in short: radio quasar) 3C 279, at a distance of more than 5 billion light-years (a redshift of 0.536). No quasar has been observed previously in very-high-energy gamma radiation, and this is also the most distant object detected emitting gamma rays above 50 gigaelectron volts. Because high-energy gamma rays may be stopped by interacting with the diffuse background light in the universe, the observations by MAGIC imply a low amount for such light, consistent with that known from galaxy counts.
H.E.S.S. OBSERVATIONS OF THE GLOBULAR CLUSTERS NGC 6388 AND M15 AND SEARCH FOR A DARK MATTER SIGNAL
Publisher: American Astronomical Society
Date: 08-06-2011
Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944
Publisher: Elsevier BV
Date: 04-2011
Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS2155 −
Publisher:
American Physical Society (APS)
Date:
20-11-2013
Publisher: American Physical Society (APS)
Date: 20-11-2013
First stars and the extragalactic background light: how recentγ-ray observations constrain the early universe
Publisher: EDP Sciences
Date: 24-02-2009
Direct and reprocessed γ-ray emission of kpc-scale jets in FR I radio galaxies
Publisher: AIP
Date: 2007
DOI: 10.1063/1.2757353
Implications of cosmological gamma-ray absorption: II. Modification of gamma-ray spectra
Publisher: EDP Sciences
Date: 2004
Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with H.E.S.S.
Publisher: EDP Sciences
Date: 29-08-2012
The high-energyγ-ray emission of AP Librae
Publisher: EDP Sciences
Date: 10-12-2014
HiSCORE: A new detector for astroparticle and particle physics beyond 10 TeV
Publisher: Elsevier BV
Date: 11-2012
Relationship between Intervention Dose and Outcomes in Living Well with Diabetes—A Randomized Trial of a Telephone-Delivered Lifestyle-Based Weight Loss Intervention
Publisher: SAGE Publications
Date: 11-2015
DOI: 10.4278/AJHP.140206-QUAN-62
Abstract: To examine associations of intervention dose with weight, physical activity, glycemic control, and diet outcomes in a randomized trial of a telephone counseling intervention. Study design was a secondary analysis of intervention group. Study setting was primary care practices in a disadvantaged community in Australia. Participants were adult patients with type 2 diabetes (n = 151). Up to 27 telephone counseling calls were made during 18 months. Intervention dose was assessed as the number of calls completed (in tertile categories). Primary outcomes were weight and HbA1c, and moderate to vigorous intensity physical activity via accelerometer. Secondary outcomes were dietary energy intake and diet quality via a validated questionnaire. Analyses employed were bivariate associations of call completion with sociodemographics, and confounder-adjusted linear mixed models for associations of call completion with outcomes (multiple imputation of missing data). Only previous diagnosis of depression/anxiety had a statistically significant (p= .008) association with call completion. Call completion was significantly associated with weight loss (p .001) but not the other outcomes (p .05). Relative to low call completion, mean weight loss (as a percentage of baseline weight) was greater in the high–call completion group by −3.3% (95% confidence interval, −5.0% to −1.5%). Increased dose of intervention was associated with greater weight loss. More needs to be done to retain patients for the duration of weight loss and behavior change interventions, particularly those with diabetes and comorbid depression, who were the most difficult to engage.
DISCOVERY OF VERY HIGH ENERGY γ-RAY EMISSION FROM CENTAURUS A WITH H.E.S.S.
Publisher: American Astronomical Society
Date: 19-03-2009
A GIS-Based Planning Approach for Urban Power and Natural Gas Distribution Grids with Different Heat Pump Scenarios
Publisher: MDPI AG
Date: 05-08-2020
DOI: 10.3390/EN13164052
Abstract: Next to building insulation, heat pumps driven by electrical compressors (eHPs) or by gas engines (geHPs) can be used to reduce primary energy demand for heating. They come with different investment requirements, operating costs and emissions caused. In addition, they affect both the power and gas grids, which necessitates the assessment of both infrastructures regarding grid expansion planning. To calculate costs and CO2 emissions, 2000 electrical load profiles and 180 different heat demand profiles for single-family homes were simulated and heat pump models were applied. In a case study for a neighborhood energy model, the load profiles were assigned to buildings in an ex le town using public data on locations, building age and energetic refurbishment variants. In addition, the town’s gas distribution network and low voltage grid were modeled. Power and gas flows were simulated and costs for required grid extensions were calculated for 11% and 16% heat pump penetration. It was found that eHPs have the highest energy costs but will also have the lowest CO2 emissions by 2030 and 2050. For the investigated case, power grid investments of 11,800 euros/year are relatively low compared to gas grid connection costs of 70,400 euros/year. If eHPs and geHPs are combined, a slight reduction of overall costs is possible, but emissions would rise strongly compared to the all-electric case.
H.E.S.S. observations of the binary system PSR B1259-63/LS 2883 around the 2010/2011 periastron passage
Publisher: EDP Sciences
Date: 03-2013
Search for a Dark Matter Annihilation Signal from the Galactic Center Halo with H.E.S.S.
Publisher: American Physical Society (APS)
Date: 18-04-2011
First detection of VHEγ-rays from SN 1006 by HESS
Publisher: EDP Sciences
Date: 06-2010
Discovery of very high energyγ-ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
Publisher: EDP Sciences
Date: 11-2013
HESS J1943+213: a candidate extreme BL Lacertae object
Publisher: EDP Sciences
Date: 30-03-2011
Related Organisations
Fraunhofer-Einrichtung Für Energieinfrastrukturen Und Geothermie IEG
Location: Germany
Fraunhofer-Institut Für Energiewirtschaft Und Energiesystemtechnik
Location: Germany
Related Funding Activities
No related grants have been discovered for Tanja M. Kneiske.