Hybrid PV/T solar systems for domestic hot water and electricity production

Hybrid photovoltaic/thermal (PV/T) solar systems can simultaneously provide electricity and heat, achieving a higher conversion rate of the absorbed solar radiation than standard PV modules. When properly designed, PV/T systems can extract heat from PV modules, heating water or air to reduce the operating temperature of the PV modules and keep the electrical efficiency at a sufficient level. In this paper, we present TRNSYS simulation results for hybrid PV/T solar systems for domestic hot water applications both passive (thermosyphonic) and active. Prototype models made from polycrystalline silicon (pc-Si) and amorphous silicon (a-Si) PV module types combined with water heat extraction units were tested with respect to their electrical and thermal efficiencies, and their performance characteristics were evaluated. The TRNSYS simulation results are based on these PV/T systems and were performed for three locations at different latitudes, Nicosia (35°), Athens (38°) and Madison (43°). In this study, we considered a domestic thermosyphonic system and a larger active system suitable for a block of flats or for small office buildings. The results show that a considerable amount of thermal and electrical energy is produced by the PV/T systems, and the economic viability of the systems is improved. Thus, the PVs have better chances of success especially when both electricity and hot water is required as in domestic applications.

[1]  Ha Herbert Zondag,et al.  The thermal and electrical yield of a PV-thermal collector , 2002 .

[2]  Soteris A. Kalogirou,et al.  Use of TRNSYS for modelling and simulation of a hybrid pv–thermal solar system for Cyprus , 2001 .

[3]  Y. Tripanagnostopoulos,et al.  Hybrid photovoltaic/thermal solar systems , 2002 .

[4]  Y. Tripanagnostopoulos,et al.  Energy, cost and LCA results of PV and hybrid PV/T solar systems , 2005 .

[5]  T. Bergene,et al.  Model calculations on a flat-plate solar heat collector with integrated solar cells , 1995 .

[6]  E. C. Kern,et al.  Combined photovoltaic and thermal hybrid collector systems , 1978 .

[7]  Zoltan J. Kiss,et al.  A hybrid amorphous silicon photovoltaic and thermal solar collector , 1986 .

[8]  Keith Lovegrove,et al.  Development of an approach to compare the ‘value’ of electrical and thermal output from a domestic PV/thermal system , 2003 .

[9]  H. P. Garg,et al.  SOME ASPECTS OF A PV/T COLLECTOR/FORCED CIRCULATION FLAT PLATE SOLAR WATER HEATER WITH SOLAR CELLS , 1995 .

[10]  Tony Gan Ang Photovoltaic engineering handbook , 1990 .

[11]  Tin-Tai Chow,et al.  Performance analysis of photovoltaic-thermal collector by explicit dynamic model , 2003 .

[12]  L. W. Florschuetz Extension of the Hottel-Whillier model to the analysis of combined photovoltaic/thermal flat plate collectors , 1976 .

[13]  Soteris A. Kalogirou,et al.  Solar thermal collectors and applications , 2004 .

[14]  Ha Herbert Zondag,et al.  The yield of different combined PV-thermal collector designs , 2003 .

[15]  Bin-Juine Huang,et al.  Performance evaluation of solar photovoltaic/thermal systems , 2002 .

[16]  B. Sandnes,et al.  A photovoltaic/thermal (PV/T) collector with a polymer absorber plate. Experimental study and analytical model , 2002 .

[17]  Soteris A. Kalogirou Economic analysis of solar energy systems using spreadsheets , 1996 .

[18]  C. H. Cox,et al.  Design considerations for flat-plate-photovoltaic/thermal collectors , 1985 .

[19]  S. D. Hendrie,et al.  Evaluation of combined photovoltaic/thermal collectors , 1979 .

[20]  H. P. Garg,et al.  Experimental study on a hybrid photovoltaic-thermal solar water heater and its performance predictions , 1994 .

[21]  H. P. Garg,et al.  Study of a photovoltaic-thermal system—Thermosyphonic solar water heater combined with solar cells , 1994 .

[22]  P. Raghuraman,et al.  Analytical Predictions of Liquid and Air Photovoltaic/Thermal, Flat-Plate Collector Performance , 1980 .

[23]  Bin-Juine Huang,et al.  PERFORMANCE EVALUATION OF SOLAR PHOTOVOLTAIC / THERMAL SYSTEMS , 2001 .

[24]  Stefan Krauter,et al.  The integrated solar home system , 2003, 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of.