Skip to main navigation menu Skip to main content Skip to site footer

Articles

CJPL: Vol.1 No.1, March 2018 - Special Edition

Investigation and Comparison of Heat Generated by Coloured Metallic Plates in Response to the Emissive and Absobtion Power of the Surfaces of the Coloured Plate

  • Akinboro F. G., Usikalu M. R., Makinde V.
  • Okeyode I. C., Alabi A. A., Alatise O. O.
  • Braide O.O. & Erusiafe N. E.
Submitted
May 30, 2018
Published
2018-03-31

Abstract

A colour test was carried out to determine the rates of absorption and emission of infrared radiation by coloured hollowed metallic plates which result in increase in temprature of the holllowed plates at maximum radiation of 750 Wm-2 at Abeokuta 7.198305 and Longitude 3.439533 during the month of March 2013. Five hollow metallic plates of different paint colours (black, green, red, blue and white) were exposed to sunlight simultaneously and the temperature generated in each plate was recorded using a data logger. A wooden box that was divided into five cavities was constructed and lagged with wood shavings to provide insulation and the five coloured hollowed metallic plates of dimension d=4h were inserted in it. The choice dimension d=4h is to minimise shading of the inside of the plate (d is the diameter of each of the plates and h is the height) the top of the plates were covered with a 5 mm thick glass. The top cover plates were securely laid tightly to both the wooden box and the tip of the plates to prevent heat loss to the surrounding and also from crossing from one plate to another.  This arraignment is similar to that of a flat plate collector and calorimeter experiment. The centre of each of the plate was connected to five probes of a data logger and the temperature of changes inside the plates are logged and recorded.