A review of solar absorption cooling systems combined with various auxiliary energy devices

from both environmental and energy-saving points of view, solar heating and cooling systems have recently proven themselves in the commercial world as the environmentally friendly and sustainable energy systems which can replace the systems powered by conventional sources of energy such as fossil fuels and electricity. in the present paper, the research contributions conducted on solar absorption cooling systems, integrated with different auxiliary energy devices, are comprehensively reviewed and discussed. also, various cooling systems integrated with solar technologies, i.e., flat-plate collector, evacuated tube collector, compound parabolic collector and parabolic trough collector, are reviewed. the survey and comparison are carried out in terms of some crucial parameters such as coefficient of performance, annual energy consumption and payback period. further, this work briefly presents and discusses some possible opportunities for future works from the efficiency viewpoint.