Masters Theses

Modeling lighting distributions in biological growth chambers

Abstract

"The purpose of this research was to develop a method for modeling the lighting distributions in biological growth chambers. Photosynthetic Photon Flux Density (PPFD) readings were taken as a function of radius for each model of lamp. These data points were fitted to a trial function of a thirteen-term Legendre polynomial series. A computer program was created that read the positions and Legendre coefficients of a set of lamps and output the PPFD across the table surface at a given height. The model was checked by measuring the PPFD in a growth chamber with an integrating quantum photometer and then plotting the ratio of experimental to theoretical values. The ratios were found to be in good quantitative agreement with theory, with the presence of the white reflecting walls in the chamber being the chief cause for the discrepancies between the experimental values and the model. The model was then used to move lamps within the growth chamber, with the goal of increasing the uniformity. By merely repositioning the lamps, the CV was reduced from 10.6% to 9.0%, and the model indicated that better uniformity could be achieved by using lamps with wider light distributions in the center of the chamber"-- Abstract, p. ii

Advisor(s)

Bell, Robert John, 1934-

Committee Member(s)

Alexander, Ralph William, Jr.
Gale, Nord L., -2019

Department(s)

Physics

Degree Name

M.S. in Physics

Publisher

University of Missouri--Rolla

Publication Date

Summer 1986

Pagination

vii, 69 pages

Note about bibliography

Includes bibliographical references (page 40)

Rights

© 1986 Kent Bowen Reuber, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 5397

Print OCLC #

14698130

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