Banca de DEFESA: EVANDSON CLAUDE SEABRA DANTAS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : EVANDSON CLAUDE SEABRA DANTAS
DATE: 20/12/2022
TIME: 08:30
LOCAL: Virtual
TITLE:

ELECTRICAL EQUIVALENCE PYRANOMETER WITH AMBIENT TEMPERATURE ANALOG COMPENSATION

KEY WORDS:

Electrical Equivalence Pyranometer, Feedback Wheatstone Bridge, Constant Temperature Difference.

PAGES: 64
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Medidas Elétricas, Magnéticas e Eletrônicas; Instrumentação
SPECIALTY: Instrumentação Eletrônica
SUMMARY:

Pyranometers are devices used to measure incident radiation per unit area. This type of device is found in many applications in the field of solar energy, UV treatment, atmospheric research, etc. Some of these devices are based on the principle of electrical equivalence, in which radiant power is equated with electrical power in a thermoelectric balance. The balance of this balance usually occurs by compensating the radiant power by an electrical power to maintain a resistance thermometer at constant temperature. This configuration, however, has limitations when the ambient temperature varies, varying parameters such as sensitivity, useful output voltage, power consumption, among others. In this work, it is proposed to replace the configuration that keeps the sensor temperature constant for the configuration of constant temperature difference. The proposal is formulated by modifying the architecture of the feedback Wheatstone bridge so that it works with a constant temperature difference. The implemented
proposal is then validated through computer simulations in a SPICE environment and through field experiments. In this work, a prototype was developed that was tested in 3 different climatic conditions, namely: clear weather, partially cloudy weather and cloudy wheater. Results of this work point to an improvement in the useful voltage range by 5 times, a reduction in the influence of ambient temperature variation on the output voltage, a reduction in electrical consumption and an increase in the sensitivity to incident radiation.

COMMITTEE MEMBERS:
Presidente - 1284113 - SEBASTIAN YURI CAVALCANTI CATUNDA
Interno - 2140683 - DIOMADSON RODRIGUES BELFORT
Externo ao Programa - 3157135 - ANTONIO WALLACE ANTUNES SOARES - UFRNExterno à Instituição - FERNANDO RANGEL DE SOUSA - UFSC
Externo à Instituição - RAIMUNDO CARLOS SILVÉRIO FREIRE - UFCG