A Comparative Analysis of the Role of Carbon Dioxide in Multi Slope Solar Stills.

Abstract

: The minimization of carbon dioxide (CO2) footprint is a significant problem for freshwater production. Freshwater produced by sunlight is a renewable energy that helps to reduce CO2 emissions. The aim of this research is to investigate the CO2 footprint of solar stills. The embodied energy analysis is used to determine the CO2 footprint, as well as CO2 mitigation, carbon credit energy generation factor, and life cycle conversion efficiency. The comparison is conducted on a single basin multi slope solar still. The multi slope is a square-shaped pyramid that acts as a transparent medium in the solar still. Two multi-slope solar stills were built for experimental purposes. In multi slope solar stills, two types of experiments are performed to measure the CO2 emission footprint and energy consumption: without shading and with shade on a glass plate. The findings of the analyses reveal that CO2 emissions footprint and embodied energy were lower in CPS than in SPS, while CO2 mitigation, carbon credit, energy production factor, and life cycle conversion efficiency were higher in CPS. In addition to the analysis, the footprint of CO2 emissions from single slope still shading (SSSS) and multi slope still shading (SSSS) were compared. Shading of multi slope is the best performer in terms of CO2 emission footprint when compared to SSSS.