Techno-economic appraisal of an integrated collector/storage solar water heater

Integrated collector/storage solar water heaters, due to their simple compact structure and inherent freeze protection, offer a promising approach for solar water heating in colder climates. Such a system, designed specifically for application at a Northern latitude, has been developed incorporating a heat retaining storage vessel mounted within a concentrating cusp reflector supported by a novel exo-skeleton framework. The performance was determined experimentally under real operational conditions in the Northern Irish climate. A detailed cost analysis is presented and payback periods, substituting different local fuel/power sources, determined.

[1]  Raymond W. Bliss,et al.  The derivations of several ``Plate-efficiency factors'' useful in the design of flat-plate solar heat collectors , 1959 .

[2]  W. R. McIntire.  New reflector design which avoids losses through gaps between tubular absorbers and reflectors , 1980 .

[3]  P. J. Lunde.  Solar thermal engineering: Space heating and hot water systems , 1980 .

[4]  Derrick P. Grimmer,et al.  Augmented solar energy collection using different types of planar reflective surfaces; theoretical calculations and experimental results☆ , 1978 .

[5]  W. Beckman,et al.  Solar Engineering of Thermal Processes , 1985 .

[6]  P. Yianoulis,et al.  Integrated collector-storage systems with suppressed thermal losses , 1992 .

[7]  D. C. Larson.  Concentration Ratios for Flat-Plate Solar Collectors with Adjustable Flat Mirrors , 1980 .

[8]  H. W. Stoll.  Design for Manufacture: An Overview , 1986 .

[9]  Roland Winston,et al.  Principles of cylindrical concentrators for solar energy , 1975 .

[10]  B L Miles,et al.  Design for Assembly—A Key Element within Design for Manufacture , 1989 .

[11]  P. L. Martin,et al.  Faber and Kell's Heating and Air Conditioning of Buildings , 1995 .

[12]  Ari Rabl,et al.  Active solar collectors and their applications , 1985 .

[13]  Z. Lavan,et al.  Experimental study of thermally stratified hot water storage tanks , 1977 .

[14]  D. Grimmer,et al.  Augmented solar energy collection using various planar reflective surfaces: theoretical calculations and experimental results , 1978 .

[15]  N. E. Wijeysundera.  Geometric factors for plane specular reflectors , 1978 .

[16]  Ibrahim S. Taha,et al.  Effect of off-south orientation on optimum conditions for maximum solar energy absorbed by flat plate collector augmented by plane reflector , 1979 .

[17]  Philip C. Eames,et al.  The effect of tank geometry on thermally stratified sensible heat storage subject to low Reynolds number flows , 1998 .

[18]  H. Tabor,et al.  Stationary mirror systems for solar collectors , 1958 .

[19]  Mervyn Smyth,et al.  A comparative performance rating for an integrated solar collector/storage vessel with inner sleeves to increase heat retention , 1999 .

[20]  Roland Winston,et al.  Absorption enhancement in solar collectors by multiple reflections , 1980 .

[21]  J. O'Gallagher,et al.  Development of compound parabolic concentrators for solar energy , 1983 .

[22]  H. H. Safwat,et al.  Determination of the optimum orientations for the double-exposure, flat-plate collector and its reflectors , 1966 .

[23]  Stuart L. Grassie,et al.  The use of planar reflectors for increasing the energy yield of flat-plate collectors , 1977 .