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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

Ellehauge K., and Shah L. J., 2000, “Solar Combisystems in Denmark-The Most Common System Designs,” Proc. EuroSun 2000, Copenhagen, Denmark.
Bliss,  R. W., 1955, “Design and Performance of the Nation’s only Fully Solar-Heated House,” Air Conditioning, Heating and Ventilating, 52 (10), p. 92.
Engebretson, C. D., “The Use of Solar Energy for Space Heating-M.I.T.: Solar House IV.” Proc. of the UN Conference on New Sources of Energy, 5, 159 (1964).
Löf, G. O. G., El-Wakil, M. M., and Chiou, J. P., 1963, “Residential Heating with Solar Heated Air—the Colorado Solar House,” Trans. ASHRAE, 77.
Löf,  G. O. G., El-Wakil,  M. M., and Chiou,  J. P., 1964, “Design and Performance of Domestic Heating Systems Employing Solar Heated Air—the Colorado House,” Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol., 5, 185.
Esbensen, and Korsgaard, 1977. “Performance of the Zero Energy House in Denmark,” Report no. 64, Thermal Insulation Laboratory, Technical University of Denmark.
Suter, J-M., 2000, “Solar Combisystems—Overview 2000,” IEA SHC—Task 26.
Andersen N. B., 1988, “Solvarmeanlæg til Rumpovarmning og varmt brugsvand, demonstrationsanlægget i Ejby,” Report no. 189, Thermal Insulation Laboratory, Technical University of Denmark.
Ellehauge, K., et al., 2000, “Erfaringer fra malinger på kombinerede solvarme- og biobrændselsanlæg,” Technological Institute, Denmark.
Ellehauge, K., 1993, “Målinger på solvarmeanlæg til kombineret brugsvands- og rumopvarmning—5 markedsførte solvarmeanlæg installeret hos anlægsejerne,” Report no. 255, Thermal Insulation Laboratory, Technical University of Denmark.
Andersen, E., Furbo, S., and Shah J. J., 2003, “The Influence of Weather on the Thermal Performance of Solar Heating Systems,” Proc. ISES 2003, Göteborg, Sweeden.
Klein, S. A., et al., 1996, TRNSYS 14.1, User Manual, University of Wisconsin Solar Energy Laboratory.
Drück, H., 2000, “MULTIPORT Store—Model, Type 140 for TmSys,” Institut für Thermodynamik und Wärmetechnik, Universität Stuttgart.
Perers, B., 2000, “A Solar Collector Model and Emulator for IEA Task 26, Description for Solar Thermal System Testing, Based on the CEN 12975 and the TRNSYS Type 132 Collector Model,” Vattenfall Utveckling AB.
Streicher, W., et al., 2002, “Solar Combisystems,” Milestone report C 0.2, IEA SHC-Task 26.
Shah, L. J., 2001, “Undersøgelse af et solvarmeanlæg til kombineret rum- og brugsvandsopvarmning,” SR-01-19, Department of Civil Engineering, Technical University of Denmark..
Skertveit, A., Lund, H., and Olseth, J. A., 1994, “Design Reference Year,” Report no. 1194 Klima, Det Norske Institutt.
Mikkelsen, S. E., and Jørgensen, L. S., 1981, “Solvarmeanlæg til rumopvarmning, en udredning baseret på 2 års malinger på anlæg i Greve og Gentofte,” Report no. 112, Thermal Insulation Laboratory, Technical University of Denmark.

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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