Effect of carbon dioxide gas on the photovoltage-distance relationship

Date

4-1996

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Demetrio A Yco, Jr.

Abstract

The effect of carbon dioxide (002) gas on the photovoltage-distance relationship was determined. An inexpensive high-pressure interference-free photometer was designed and constructed. This photometer was used to measure the voltage generated due to illumination from a light source. The basic circuit design of the photometer utilized a current to voltage conversion mechanism. Also, a prototype gas chamber was designed and fabricated. This chamber was used as the environment for the determination of the effect of CO, gas on the photovoltage-distance relationship. This chamber has a simple pressure-variation mechanism. The pressure of the CO, gas inside the chamber is increased from a gauge pressure of 0 psi up to 50 psi. Measurements of the distance with the corresponding voltage generated at a certain pressure was conducted. The data obtained for the effect of CO2 gas on the photovoltage-distance relationship was also compared with compressed air at the same pressure range and in atmospheric condition. An analysis of variance (ANOVA) was used to determine the variation of the mean voltages at different pressure values. Results showed that an increase in the pressure of CO, gas resulted to a slight decrease in the photovoltage generated by the photometer as its distance from the light source is narrowed. However, this observed decrease did not significantly affect the relationship obtained for the photovoltage generated and the distance between the photometer and the light source. For all the data obtained, the photovoltage-distance relationship can be best described by the equations, a) V(x) = Const, for pi< = x < = p2 b) V(x) = X-A * B for x > p, The presence of the carbon dioxide gas has a significant effect on the photovoltage-distance relationship. This is manifested by the decrease in the output photovoltage.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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