Abstract In this study, the exergy destruction and irreversibility analysis of an 8 kW experimental power plant was presented. The first objective of the present study was to find the component with primary irreversibility or exergy destruction in the system. In addition, the effect of different operation conditions such as boiler pressure and output power on the irreversibility of components was investigated. Based on the results, it was found that boiler and feed water tank has the maximum and minimum irreversibility in the system, respectively. Then, the boiler as the primary exergy destruction component in the system was focused. The boiler was divided into three regions namely: combustion, heat transfer, exhaust and the irreversibility in each region was evaluated .The results showed that the maximum part of irreversibility belongs to the heat transfer region with about 54.8% followed by 39% and 6% for combustion and exhaust regions, respectively.

Keywords