Classification and Types of Energy Recovery Systems

In general, energy recovery systems can be commonly identified based on their classification and types. They are classified into: (1) application, in terms of process-to-process system, process-to-comfort system and comfort-to-comfort system and (2) working mechanism in terms of air-to-air energy recovery, earth-to-air energy recovery, earth-to-water energy recovery. In the context of types, there are five common energy recovery systems, which can be found in the global market and have been extensively studied which are based on the construction of their heat exchangers. These include fixed-plate, rotary enthalpy wheel, heat pipe, run-around and thermosiphon. This chapter presents classifications and types of energy recovery systems as well as an overview of existing research in these domains.

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Acknowledgements

Fundamental Research Grant Scheme, Ministry of Education Malaysia (203/PTEKIND/6711574; 203/PTEKIND/6711274).