Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array

Takashi Shimomachi, Dennis Larson, Kenneth Jordan, Joel L Cuello

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Reducing the thermal load emitted by artificial lighting in greenhouses and growth chambers would significantly diminish the electrical input required for air conditioning. Also, a reduced thermal load from artificial lighting would enable the achievement of an optimized volume, and attendant mass, for plant growth chambers, which is especially important for bioregenerative space life support applications. The three-dimensional radiation outputs and energy balances of water-cooled 400-W high-pressure sodium (HPS) lamps and a light-emitting diode (LED) array gave the following results: (1) The electrical conversion efficiency for the control HPS lamp was 49%, exceeding the average efficiency for the water-cooled HPS lamps of 34%, or 30% when accounting for the water re-circulating pump; and (2) The electrical conversion efficiency of the LED array was 27.3%, based on total radiation output or PAR output, and was practically the same as that of the control HPS lamp of 27.3% based on PAR output.

Original languageEnglish (US)
Title of host publicationActa Horticulturae
Pages393-397
Number of pages5
Volume711
StatePublished - Jun 2006

Publication series

NameActa Horticulturae
Volume711
ISSN (Print)05677572

Fingerprint

water distribution
energy balance
sodium
growth chambers
lighting
heat
air conditioning
water
pumps
plant growth
greenhouses

Keywords

  • Electrical conversion efficiency
  • Energy balance
  • HPS
  • LED
  • Water cooling

ASJC Scopus subject areas

  • Horticulture

Cite this

Shimomachi, T., Larson, D., Jordan, K., & Cuello, J. L. (2006). Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array. In Acta Horticulturae (Vol. 711, pp. 393-397). (Acta Horticulturae; Vol. 711).

Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array. / Shimomachi, Takashi; Larson, Dennis; Jordan, Kenneth; Cuello, Joel L.

Acta Horticulturae. Vol. 711 2006. p. 393-397 (Acta Horticulturae; Vol. 711).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shimomachi, T, Larson, D, Jordan, K & Cuello, JL 2006, Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array. in Acta Horticulturae. vol. 711, Acta Horticulturae, vol. 711, pp. 393-397.
Shimomachi T, Larson D, Jordan K, Cuello JL. Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array. In Acta Horticulturae. Vol. 711. 2006. p. 393-397. (Acta Horticulturae).
Shimomachi, Takashi ; Larson, Dennis ; Jordan, Kenneth ; Cuello, Joel L. / Energy balance and three-dimensional radiation distribution of water-cooled HPS lamps and of a Light-emitting Diode (LED) array. Acta Horticulturae. Vol. 711 2006. pp. 393-397 (Acta Horticulturae).
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