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TECHNICAL PAPERS

Thermal Performance of Danish Solar Combi Systems in Practice and in Theory

[+] Author and Article Information
E. Andersen, L. J. Shah, S. Furbo

Department of Civil Engineering, Technical University of Denmark, Building 118, DK-2800 Kgs. Lyngby, Denmark

J. Sol. Energy Eng 126(2), 744-749 (May 04, 2004) (6 pages) doi:10.1115/1.1688381 History: Received October 01, 2003; Revised January 01, 2004; Online May 04, 2004
Copyright © 2004 by ASME
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References

Figures

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Typical Danish solar combi system 7
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Measured thermal performance of the solar combi systems
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Solar combi system based on hot water tank with three heat exchanger spirals, system no. 1 7
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Solar combi system recently introduced on the Danish market, system no. 2 7
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The SH load used in the calculations. Left figure shows the SH load without SH demand during the summer period and right figure shows the SH load with SH demand during summer
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Annual net utilized solar energy as a function of the solar fraction for different solar collector areas and different hot water consumptions
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Three different temperature operation conditions in the SH loop which are used in the calculations
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Calculated net utilized solar energies of system no. 1 with different storage designs and operation conditions
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Calculated net utilized solar energies of system no. 2 with different storage designs and operation conditions
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Measured and calculated thermal performances. The letter a refer to solar combi systems with and external heat exchanger between the solar collector loop and the SH loop (Fig. 1), while b refer to all other system types

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