Saeed Sayadi

Saeed Sayadi
Technische Universität Berlin | TUB · Institut für Energietechnik

Doctor of Engineering

About

20
Publications
8,436
Reads
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131
Citations
Additional affiliations
September 2014 - present
Technische Universität Berlin
Position
  • Research Associate
December 2013 - August 2014
RWTH Aachen University
Position
  • Research Assistant
August 2012 - September 2013
Daimler
Position
  • Internship & Master Thesis
Education
October 2010 - November 2013
Technische Universität Berlin
Field of study
  • Process, Energy and Environmental Systems Engineering
September 2002 - February 2007
Khaje Nasir Toosi University of Technology
Field of study
  • Mechanical Engineering (Fluid Mechanics & Thermodynamics)

Publications

Publications (20)
Article
The objective of this paper is to carry out a dynamic exergetic assessment of a large complex building. Results in this paper show that although the building and its Heating, Ventilation, and Air Conditioning (HVAC) systems with an energetic efficiency of 122.6% meet energy performance regulations, their overall exergetic efficiency is extremely lo...
Article
This article addresses the merits of exergy-based control strategies in comparison to energy-based ones in terms of increasing the energetic efficiency of a building and/or decreasing the operating costs of Heating, Ventilation and Air Conditioning (HVAC) systems. In this study, a dynamic exergy model for building energy systems is demonstrated to...
Technical Report
Full-text available
The IEA EBC Annex 64 – LowEx Communities was a three year international research project which aims to demonstrate the potentials of low exergy thinking on a community level as energy and cost efficient solutions to achieve 100 % renewable and GHG emission-free energy systems. Central challenges are the identification of promising and efficient tec...
Article
Full-text available
This study presents a novel approach to apply advanced exergy analysis to a dynamic system. The main building of the E.ON Energy Research Center located in Aachen, Germany, which is a large, complex and multifunctional building is considered as the case study. Results of the present study show a substantial interdependency among different component...
Thesis
Full-text available
The objective of the present research is the operational assessment of building energy systems through the application of conventional and advanced exergy-based methods. Two different case studies are considered here. The first one is a theoretical single-office building equipped with heating and ventilation systems, located in a typical cold-clima...
Article
The current paper aims to compare the four fundamental Organic Rankine Cycle (ORC) structures with a zeotropic mixture of Pentane and Hexane, utilized as the working fluid. The studied variants of ORCS include simple single and dual-pressure ORCs alongside their recuperative configurations. Each configuration is optimized in different mole fraction...
Article
The current paper enhances the methods presented in ASME PTC 4.1 and 4.4 and proposes an exergy-based loss method for assessing heat recovery steam generators (HRSGs) performance. First, energy and exergy analyses are applied to one HRSG unit in an existing combined cycle power plant. Then, the calculated exergy destructions are further split into...
Article
Condensing boilers are used in commercial and residential buildings extensively. In this paper, a loss method is proposed to estimate the energy and exergy efficiencies of condensing hot water boilers. The presented method is based on the development of the method presented in ASME PTC 4.1. Energy loss terms consist of exhaust flue gas, carbon mono...
Article
Full-text available
This work applies the Dynamic Advanced Exergy Analysis (DAEA) to a heating and domestic hot water (DHW) facility supplied by a Stirling engine and a condensing boiler. For the first time, an advanced exergy analysis using dynamic conditions is applied to a building energy system. DAEA provides insights on the components’ exergy destruction (ED) by...
Article
Die Gebäudeautomation regelt unterschiedlichste Anlagen verschiedener Hersteller, um ein gesundes und komfortables Innenraumklima zu schaffen. Um den wachsenden Anforderungen an einen energieeffizienten Betrieb bei möglichst geringen Investitionen gerecht zu werden, bedarf es eines objektiven Bewertungsverfahrens, das das Automationssystem befähigt...
Technical Report
Die Verbesserung der Regelungsstrategie mit dem Ziel, einen effizienten Betrieb von Energiesystemen zu erreichen, ist eine Herausforderung. Aufgrund der Tatsache, dass die meisten Gebäude unter einer Qualitätsdiskrepanz zwischen Energieangebot und -nachfrage leiden und im Gegensatz zu Energie die Exergie sowohl die Quantität als auch die Qualität d...
Conference Paper
Full-text available
The aim of this study is to formulate dynamic exergetic and exergoeconomic analyses for the building envelope. An exergy analysis specifies the magnitude, location and causes of the thermodynamic inefficiencies in a system, while an exergoeconomic analysis provides very useful information about monetary losses due to thermodynamic inefficiencies wi...
Conference Paper
Full-text available
This article demonstrates the advantage of model predictive control (MPC) as an alternative to an already-existing conventional control system, in terms of total energy consumption and comfort criteria. In our case study, we consider one office in the main building of the E.ON Energy Research Center in Aachen, Germany. A dynamic heat transfer model...
Conference Paper
Full-text available
Die Verbesserung von Gebäudeautomationssystemen eröffnet weitereichende Möglichkeiten für eine Verringerung des Endenergiebedarfs von Gebäuden. In diesem Forschungsprojekt wird daher untersucht, wie die thermodynamischen Methoden der Exergieanalyse auf die Regelung komplexer Gebäudeenergiesysteme angewendet werden können. Dabei steht die Steigerung...
Patent
Full-text available
Die Erfindung betrifft ein Verfahren zum Regeln eines Brennstoffzellensystems zur Bereitstellung zumindest eines Teils der elektrischen Antriebsleistung eines Fahrzeugs mittels wenigstens eines Steuergeräts, in welchem statische oder dynamische Kennfelder gespeichert sind, und/oder aus Eingangsgrößen berechnet werden, wozu dem Steuergerät Messwerte...
Patent
Full-text available
Die Erfindung betrifft ein Brennstoffzellensystem mit wenigstens einer Brennstoffzelle, mit einer Luftfördereinrichtung und mit wenigstens einem Befeuchter, wobei der Befeuchter zwei getrennte durchströmbare Behälter aufweist, welche ein wasserzurückhaltendes Material aufweisen, und welche vom Zuluftstrom zu der Brennstoffzelle und vom Abluftstrom...
Article
In this paper we perform an exergoeconomic analysis to a PEM (proton exchange membrane) vehicular fuel cell system used in the latest generation of environmentally friendly cars. Two alternative configurations of a fuel cell system are considered (with and without an expander), and two alternative design concepts for each configuration: BoL (Begin...
Article
Full-text available
In the present article, thermodynamic and thermoeconomic analysis are applied to find the optimum values of design parameters for water-tube heat recovery steam generators (HRSGs) in combined cycle power plants. Design variables optimized in this article are pinch point and gas-side velocity. Optimization is carried out based on two different objec...

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Projects

Projects (2)
Archived project
The International Energy Agency’s Energy in Buildings and Communities (IEA-EBC) Programme is an international energy research and innovation programme in the buildings and communities field. The EBC Research Programme is mainly undertaken through a series of research projects, so-called 'Annexes'. The IEA EBC Annex 64 – LowEx Communities aims to demonstrate the potentials of low exergy thinking on a community level as energy and cost efficient solutions to achieve 100% renewable and GHG emission-free energy systems. 17 organizations from 8 countries participate in EBC Annex 64. The research focus of E.ON Energy Research Center is on the implementation of the exergy-based control strategy in energy supply systems to optimize their performance. For more information, please visit the website of EBC Annex 64: http://www.annex64.org
Archived project
The main objective of this project is to develop an exergy-based control strategy for building energy systems. The main building of the E.ON Energy Center in Aachen, Germany, is the use case of this research. The developed control strategy is also evaluated via software-in-the-loop before the real-life implementation. For more information, please visit the website of E.ON Energy Research Center: http://www.ebc.eonerc.rwth-aachen.de/cms/E-ON-ERC-EBC/Forschung/Projekte/Projekte-Energiekonzepte-fuer-Gebaeude-u/~mfwd/Energiebasierte-Regelungsstrategien/?lidx=1