A review of thermally activated cooling technologies for combined cooling, heating and power systems

The state of the art of research in thermally activated cooling technologies for combined cooling, heating and power (CCHP) systems are presented here in detail, mainly including absorption and adsorption refrigeration, and desiccant cooling. A basic description of thermally activated cooling is given first. Next, according to the diverse categories of thermally activated cooling, the working principles, products markets available or under development, diverse combinations of thermally activated technologies in CCHP applications or experimental units, and existing problems are listed and discussed through a comprehensive review of the literature. Furthermore, more recent advanced research of thermally activated cooling in innovative concept, material and technologies are included. Finally, detailed summary and suggestions are proposed for proper utilization of thermally activated cooling technologies, and the future development roadmap and preferred strategies are also outlined. The review will demonstrate that thermally activated cooling technologies are attractive alternatives that not only serve the need for air-conditioning, refrigeration, dehumidification, and augmenting prime movers, but also can meet the demand for energy conservation and environmental protection.