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Www.solr.uni-kassel.de www.solar.uni-kassel.de 1 SOLNET Milan 05.03.2008 Optimization of the air-to-water heat exchanger configuration for water preheating.

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Präsentation zum Thema: "Www.solr.uni-kassel.de www.solar.uni-kassel.de 1 SOLNET Milan 05.03.2008 Optimization of the air-to-water heat exchanger configuration for water preheating."—  Präsentation transkript:

1 1 SOLNET Milan Optimization of the air-to-water heat exchanger configuration for water preheating in open district heating nets Janybek Orozaliev

2 2 To my person 1998 – 2003 Kyrgyz-Russian Slavic University, Bishkek major: Renewable Energies 2003 – 2005 Kassel University (Germany) major: Power and Environmental Engineering master, scholarship from DAAD 10/2005 -?Kassel University (Germany) PhD study scholarship from Volkswagen Foundation 09/06 – 02/10

3 Janybek Orozaliev 3 Strong intercontinental climate In summer: high solar irradiation and ambient temperatures Solar preheating Kyrgyzstan – favorable conditions for solar heating Open district heating net Hot water withdraw directly out of the net High steady load and low inlet temperatures

4 Janybek Orozaliev 4 Strong intercontinental climate In summer: high solar irradiation and ambient temperatures Kyrgyzstan – favorable conditions for solar heating Open district heating net Hot water withdraw directly out of the net High steady load and low inlet temperatures Application of uncovered collectors

5 Janybek Orozaliev 5 Strong intercontinental climate In summer: high solar irradiation and ambient temperatures Open district heating net Hot water withdraw directly out of the net High steady load and low inlet temperatures Strong intercontinental climate In summer: high solar irradiation and ambient temperatures Kyrgyzstan – favorable conditions for solar heating Open district heating net Hot water withdraw directly out of the net High steady load and low inlet temperatures Application of uncovered collectors T amb > T in

6 Janybek Orozaliev 6 Air-to-water heat exchanger (AHX) Uncovered collector Multicomponent-System Uncovered air collector Air Collector (31 m²) Uncovered Collector (62 m²) Air-to-Water Heat Exchanger (AHX)

7 Janybek Orozaliev 7 What is the optimal configuration of the system? (depending on climate and boundary conditions) How should components be dimensioned? (depending on climate) How should components be operated/controlled? (depending on weather) Potential analysis in CIS countries Multicomponent-System – Research mathematical models experimental set up

8 Janybek Orozaliev 8 Air-to-water heat exchanger (AHX) Uncovered collector My part Uncovered air collector

9 Janybek Orozaliev 9 Extension of numerical models: Description of thermal and hydraulical performance of AHX Further developing of the model, which considers geometry in detail Based on Nu-correlations (not CFD) Aims and work packages Cost functions: of components depending on their properties (geometry, power, etc) Optimization: Optimal configuration of AHX for this application Optimization calculations coupled with system simulations in TRNSYS Guidelines for dimensioning and operation of AHX: e.g. in form of characteristic curves for different climates

10 Janybek Orozaliev 10 Thanks for your attention Janybek Orozaliev Solar and Systems Engineering Kassel University, Germany

11 Janybek Orozaliev 11 Luft-Wasser- Wärmeübertrager unabgedeckter Kollektor Arbeitsbereich Christian Budig unabgedeckter Luftkollektor

12 Janybek Orozaliev 12 Validierung und Parameteranpassung: Die numerischen Modelle sollen anhand der Messdaten validiert und eine Parameteranpassung vorgenommen werden Ziele und Arbeitspakete Christian Budig Systemsimulationen: Untersuchung der mögl. Systemkonfigurationen in Abhängigkeit verschiedener Klimata Richtlinien zur Dimensionierung und Regelung von Systemen: Identifizierung geeigneter Luftkollektorsysteme: Untersuchung von Folien- und Polymerkollektoren; thermische Abbildung soll über bereits vorhandene Kennlinien erfolgen


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