Some chemical aspects of solar energy utilization

Mattox, Donald M.

doi:10.1016/0022-4596(77)90186-4

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Under steady state conditions, the instantaneous efficiency ( 7 ) is calculated using the following equation Fp is essentially a contant for any collector design and fluid flow rate, but it depends on the heat transfer loss coefficient, bond conductance and heat transfer loss coefficient between the water and the tube wall. The smaller slope of the efficiency curve with selective coatings compared to the curve of black painted coatings, is due to the much lower thermal radiation losses.…”

Section: Resultsmentioning

confidence: 99%

Photothermal performance of selective black nickel coatings

Gogna

Chopra

Mullick

1980

Int. J. Energy Res.

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Selective black nickel coatings with solar absorptance (αs = 0·94) and thermal emittance (ε = 0.08) at 100°C have been developed on galvanized steel using electroplating and chemical conversion techniques. Thermal performance tests have been conducted on selective and non‐selective collectors with single glass cover. A suitable collector test assembly has been constructed for thermal performance study. Measurements have been made under clear sky conditions over a wide range of inlet temperatures. For comparison, measurements have been carried out on an identical collector painted black. Thermal efficiencies of about 28 per cent at an operating water temperature =100°C ambient temperature =35°C and incident insolation =1000 W/m2 have been obtained.

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Section: Resultsmentioning

confidence: 99%