163 research outputs found
Assessing energy and thermal comfort of different low-energy cooling concepts for non-residential buildings
No full textEnergy consumption for cooling is growing dramatically. In the last years, electricity peak consumption
grew significantly, switching from winter to summer in many EU countries. This is endangering the stability
of electricity grids. This article outlines a comprehensive analysis of an office building performances
in terms of energy consumption and thermal comfort (in accordance with static – ISO
7730:2005 – and adaptive thermal comfort criteria – EN 15251:2007 –) related to different cooling
concepts in six different European climate zones. The work is based on a series of dynamic simulations
carried out in the Trnsys 17 environment for a typical office building. The simulation study was accomplished
for five cooling technologies: natural ventilation (NV), mechanical night ventilation (MV), fancoils
(FC), suspended ceiling panels (SCP), and concrete core conditioning (CCC) applied in Stockholm,
Hamburg, Stuttgart, Milan, Rome, and Palermo. Under this premise, the authors propose a methodology
for the evaluation of the cooling concepts taking into account both, thermal comfort and energy
consumption
Konzepterstellung für eine Nullemissionssiedlung im Netzverbund
No full textDiplomarbeit an der Georg-Simon-Ohm Fachhochschule Nürnberg, Fachbereich Maschinenbau / Versorgungstechnik, Studiengang Versorgungstechnik. Angefertigt am Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg
Messtechnische Bewertung und modellbasierte Messdatenauswertung von Kühlkonzepten mit Bauteilkühlung
No full textDiplomarbeit an der Fachhochschule Biberach, Studiengang Gebäudetechnik und Gebäudeklimatik. In Zusammenarbeit mit dem Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg
Qualitätszertifikat für Bürogebäude mit passiver Kühlung - Kurzzeitmessungen und deren modellbasierte Auswertung mit numerischer Gebäudesimulation und einem einfachen Parametermodell
No full textMaster Thesis an der Universität Koblenz-Landau, Studiengang Energiemanagement, Fachbereich 3: Mathematik/Naturwissenschaften. In Zusammenarbeit mit dem Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg
Abschlussbericht für das Projekt PAkoGA
No full textIn dieser Arbeit werden die außentemperaturgeführte Vorlauftemperaturregelung (Standard-TABS-Strategie), ein Verfahren das auf einer multiplen linearen Regression basiert (AMLR-Strategie) und ein Verfahren, das unter dem Obergriff der modellprädiktiven Regelung (MPC-Strategie) zusammengefasst werden kann, untersucht. Anhand der Simulationsergebnisse und des Integrationsaufwandes in die Gebäudeautomation des Seminargebäudes wurde eine Fokussierung auf die AMLR-Strategie vorgenommen
Evaluation of earth-to-air heat exchangers with a standardised method to calculate energy efficiency
No full textS.971-983In designing an earth-to-air heat exchanger (EAHX), a decision on design goals has to be made. If the air flow is given by the ventilation system and the construction site is known, the question is: is it more important to achieve a high specific energy performance based on the surface area of an EAHX, a high adoption of air temperature to ground temperature or a very small pressure loss? This paper deals with the performance of three EAHXs for mid European office buildings in service, with the aim of characterising their efficiency. A general method to compare EAHXs in operation will be introduced. First, the temperature behaviour is described by plots over time and characteristic lines, and compared by standardised duration curves. Second, the energy gain is illustrated by standardised graphs. Third, a parametric model is used to provide general efficiency criteria. Thermal efficiency should be defined by both the dynamic temperature behaviour and energy performance.35Nr.1
Konzeption einer energieautarken Nullemissionssiedlung in Ludwigshafen am Rhein
No full textDiplomarbeit an der Universität Karlsruhe, Lehrstuhl für Stadtquatierungsplanung und Entwerfen, Institut für Industrielle Bauproduktion. In Zusammenarbeit mit dem Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg
Extending the existing heat/health warning system with indoor heat load predictions
No full textS.237-243A heat/health warning system (HHWS) was established in Germany as a climate change adaptation measure and as a direct consequence of the heat wave in 2003. The system used by the German weather service currently only provides information about outdoor conditions, i.e. no data on indoor climate - which may differ significantly from ambient conditions - are provided. This article describes an extension of the existing heat/health warning system based on a thermal building simulation model. It enables internal heat loads to be estimated based on predicted meteorological conditions. While the prediction model is limited to a worst-case scenario for practicability reasons, the information derived from the load values can nevertheless be very useful. The technique was used during summer 2007 in parallel with the conventional system, illustrating the added value.30Nr.
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