OMICS International https://www.omicsonline.org/ OMICS International is a scientific organization that drives the progress of research through open access journals and organizes international conferences, The best in science news, commentary, and research. https://www.omicsonline.org/ArchiveJFRA/currentissue-fundamentals-renewable-energy-applications-open-access.php Journal of Fundamentals of Renewable Energy and Applications Volume 7 Issue 4 https://www.omicsonline.org/open-access/operation-of-a-domestic-biogas-plant-in-an-urban-setting-in-a-developingcountrya-field-experience.php?aid=91701 Operation of a Domestic Biogas Plant in an Urban Setting in a DevelopingCountryA Field Experience Emmanuel A Echiegu https://www.omicsonline.org/open-access/thermodynamic-analysis-of-a-two-stage-vapour-compression-refrigeration-system-utilizing-the-waste-heat-of-the-intercooler-for-wate.php?aid=91299 Thermodynamic Analysis of a Two Stage Vapour Compression Refrigeration System Utilizing the Waste Heat of the Intercooler for Water Heating Aftab Anjum, Mohit Gupta, Naushad A Ansari and Mishra RS https://www.omicsonline.org/open-access/application-of-solar-energy-heating-system-in-some-oil-industry-unitsand-its-economy.php?aid=91755 Application of Solar Energy Heating System in Some Oil Industry Unitsand its Economy Abd El Rahman AM, Nafey AS and Hassanien MHM https://www.omicsonline.org/open-access/dye-sensitized-solar-cells-based-on-different-solvents-comparative-study.php?aid=91758 Dye Sensitized Solar Cells Based on Different Solvents Comparative Study Zulfiqar Ali Shah, Kiran Zaib and Khalid M