International Journal of Sustainable Energy and Environmental Research

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Investigation of Performance of Solar Powered Water Generator

Pages: 1-16
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Investigation of Performance of Solar Powered Water Generator

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DOI: 10.18488/journal.13.2020.91.1.16

S. Sami

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S. Sami (2020). Investigation of Performance of Solar Powered Water Generator. International Journal of Sustainable Energy and Environmental Research, 9(1): 1-16. DOI: 10.18488/journal.13.2020.91.1.16
The objective of this study is to investigate and analyze the performance of solar water generator that produces potable clean water after a dehumidification process. The numerical model presented in this study was established after the conservation of mass and energy equations of the different subsystems of the solar powered water generator. The model was numerically solved under different conditions such as solar radiation, air humidity, air temperature and different air stream flows. the ratings of the dehumidifier are higher of at higher water production rate at lower solar radiation. the results showed that the lower the humidity ratio the higher the evaporator thermal capacity and that the higher the rate of water production the higher the evaporator thermal capacity as well as higher water production was associated with higher air flow and compressor power consumption. In addition, it was concluded that the lower the ambient temperature the higher the hybrid system efficiency and also the hybrid system efficiency increased at lower ambient temperature and higher water production rate. Finally, the predicted results were in fair agreement with experimental data published in the literature.
Contribution/ Originality
This study contributes to the existing literature by presenting a comprehensive numerical model to analyze the parameters that impact the performance of generating water from ambient air. Finally, this mathematical model can be used as design tool for solar power generators at different capacities to produce clean water.

Analysis of the Link between CO2 Outflows, Energy Utilization, and Economic Development in a Developing Country: Evidence from Republic of Congo

Pages: 17-33
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Analysis of the Link between CO2 Outflows, Energy Utilization, and Economic Development in a Developing Country: Evidence from Republic of Congo

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DOI: 10.18488/journal.13.2020.91.17.33

Jean Baptiste Bernard Pea-Assounga , Hongxing Yao , Philip Agyei Peprah , Shaibu Ali

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Jean Baptiste Bernard Pea-Assounga , Hongxing Yao , Philip Agyei Peprah , Shaibu Ali (2020). Analysis of the Link between CO2 Outflows, Energy Utilization, and Economic Development in a Developing Country: Evidence from Republic of Congo. International Journal of Sustainable Energy and Environmental Research, 9(1): 17-33. DOI: 10.18488/journal.13.2020.91.17.33
Developing countries play a number one role in international green-economic development as key holders of green products, and services. Nonetheless, these countries are not sufficiently concerned within the debates on expansion policies, due to their crucial implication in worldwide feasible development. This research aims to analyze the relationship between CO2 outflows, energy utilization, and economic development in the Republic of Congo as well as the presence of a causative link between the factors by applying the Vector Autoregressive model, including as additional proxies’ variables gross-fixed-capital-formation, and rural population. The data cover the period 1985-2018 using cointegration and causality techniques as a methodological approach. The Granger causality test outcomes of cointegrated variables showed that there is one-way Granger causality running from real GDP to Energy utilization, and running from dioxide outflows to real income as well as two–way causative link between Energy utilization and CO2 outflows in Congo. The results also display a bidirectional causal link between the rural population and Energy utilization. Overall evidence confirms that the practice of energy conservancy approach may lead to a significant and negative effect on economic development.
Contribution/ Originality
This study contributes in the existing literature by using modern econometric time series approaches to examine the nexus between CO2 outflows, energy utilization and economic development. The findings showed that the governments should invest in renewable energy to cut-off CO2 emissions.