Measurements of the total transmittance of the solar radiation through an absorbing black liquid water
Abstract
The transmittance of black liquids is important to studies of solar radiation absorbers for solar energy applications and in studies of water quality in lakes and rivers. The paper presents measurements of the total transmittance of solar radiation through a layer of black water. Sunlight which has passed through a layer of black dyed water held in an open container with a transparent bottom is measured by a pyranometer set in a black box. The measured transmittances are plotted against the depth of the water for various weight concentrations of dye. An empirical equation expressing transmittance as a function of depth and weight concentration is presented and found to fit the experimental data to within 4%.
- Publication:
-
Letters Heat Mass Transfer
- Pub Date:
- February 1979
- Bibcode:
- 1979LHMT....6...57H
- Keywords:
-
- Electromagnetic Absorption;
- Radiative Heat Transfer;
- Solar Radiation;
- Transmittance;
- Water Quality;
- Solar Collectors;
- Working Fluids;
- Fluid Mechanics and Heat Transfer