On the selection of percentile criteria for greenhouse lighting system design

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

Abstract

An investigation is presented of the relationships between various greenhouse lighting performance parameters and the associated daylight percentile (commonly known as "percentile exceedence"). Analyses were carried out on the National Solar Radiation Database (NSRDB) from the National Renewable Energy Laboratory to find the most suitable percentile value to correspond to the lowest running average Daily Daylight Integral (DDI) for a site, and to the lowest monthly average. The modeled production of hydroponic lettuce was also analysed at different percentiles. Results indicate that the most suitable percentile for a running average criterion is equal to P = 101.0 - 0.4779 L, where P equals the percentile and L equals the length of the running average in days. The minimum monthly DLI corresponds to a percentile of 83.7%. Percentiles associated with the modelled growth of hydroponic lettuce varied from 86 to 99% depending on required mass of the crop. These results can be used by designers to select the most appropriate design percentile for a facility, and in turn to design an optimum supplementary lighting system for a given greenhouse.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
PublisherAmerican Society of Agricultural and Biological Engineers
Pages7709-7721
Number of pages13
ISBN (Print)9781605605364
StatePublished - Jan 1 2008
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008 - Providence, RI, United States
Duration: Jun 29 2008Jul 2 2008

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
Volume12

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008
CountryUnited States
CityProvidence, RI
Period6/29/087/2/08

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)

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  • Cite this

    Ciolkosz, D. E. (2008). On the selection of percentile criteria for greenhouse lighting system design. In American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008 (pp. 7709-7721). (American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008; Vol. 12). American Society of Agricultural and Biological Engineers.