Exergy, environ–economic and economic analyses of a tubular solar water heater assisted solar still

Energetic and exergetic performance assessment of the inclusion of phase change materials (PCM) in a solar distillation system

Comparative study of two weir type cascade solar stills with and without PCM storage using energy and exergy analysis

Energy, exergy, economic and environmental (4E) analyses of flat-plate and V-groove solar air collectors based on aluminium and copper

In recent years, several research studies were conducted to enhance the productivity of solar stills. One of the approaches was the integration of latent heat energy storage mediums (phase change materials (PCM)) in the conventional solar stills to extend the water yield ability after the sunshine hours. Though several studies were conducted in this research area, none of the studies analyzed and reported the time of day at which the PCM start to release the stored latent heat, especially in the case of use of multiple PCMs. The present study is an experimental investigation that compare the thermal performance of three same-sized passive solar stills, i.e., conventional solar still (Still 1), still with single phase change material (Still II), still with two phase change materials (Solar III). The two PCMs used in still III are chosen in such a way that both the PCMs have almost same latent heat storage capacity, but different phase change temperature range. PCM1 and PCM2 used in solar still III have the phase change temperature (PCT) range of 58.03 °C–64.5 °C and 53.05 °C–62 °C, respectively. The experiments were conducted for the climatic conditions of Chennai, India during the month of February to May. The major inference from the experiments conducted is that, when multiple PCMs are employed in a still, selection of PCM with appropriate PCT range is very important. PCM1 should start discharging the stored latent heat energy stored once the solar radiation gets diminishing and PCM2 should start to release the heat when PCM1 has almost discharged the entire stored energy. By this way, the time of yield can be prolonged. In the results, the thermal performance of Still I, II and III was analyzed in terms of hourly yield per day and exergy efficiency. The yield of Still I was 3.680 L/m2/day while the yield of Still II and III were 4.020 L/m2/day and 4.400 L/m2/day, respectively. The exergy efficiency of still I, II and III were found to be 3.92%, 3.23% and 3.52%, respectively.

Augmenting the productivity of solar still using multiple PCMs as heat energy storage

Energy, exergy, economic and environmental (4E) analysis of a solar desalination system with humidification-dehumidification

In this study, the effects of financial and economic development on energy consumption and CO2 emissions are analyzed using multiple structural breaks, second-generation panel unit root tests, the Westerlund Cointegration Test, and PMG and MG estimators. Unlike classical studies, financial development is included, in the analysis, as an indicator of the accumulated capital as a result of industrial production that has been realized for many years. We conducted a panel data analysis on 13 developing countries for which we could obtain uninterrupted data in the Morgan Stanley Developing Countries index. We found significant relationships between economic growth, energy usage, and CO2 emissions. Financial development and carbon emissions are cointegrated in the long-term, and financial development is found to accelerate environmental pollution. Therefore, energy economists should consider the effect of financial development on energy use and carbon emissions in future studies. Policy-makers in emerging markets are also advised to take necessary actions to reduce carbon emissions while increasing financial development. It is important that the same results were obtained in medium- and small-scale countries, as well as in large economies (e.g., China) under the scope of this review.

https://www.mdpi.com/2071-1050/14/10/6298/pdf?version=1653133417

Analysis of the Relationships among Financial Development, Economic Growth, Energy Use, and Carbon Emissions by Co-Integration with Multiple Structural Breaks

Serkan Çınar

Papers

Energy, exergy, economic and environmental (4E) analysis of a solar desalination system with humidification-dehumidification

Analysis of the Relationships among Financial Development, Economic Growth, Energy Use, and Carbon Emissions by Co-Integration with Multiple Structural Breaks