Fs textexpander9/16/2023 The heat transfer enhancement, novel heat exchanger investigation, and the ORC configuration development based on a novel heat exchanger were emphasized. Finally, developments and current challenges were summarized and future research trends were also identified. ORC technology is a well–grounded and promising way to convert heat to power due to its simple structure, moderate operating parameters, flexible operation, and excellent thermo–economic performance. Figure 1 displays the schematic of a traditional ORC system, consisting of an evaporator, a condenser, a pump, and an expander. As shown in Figure 1, the technical principle of ORC is consistent with that of the traditional Rankine cycle. First, the working fluid becomes high–pressure vapor by absorbing heat energy from the heat source (waste heat or renewable energy) in the evaporator. Then, the low–pressure exhaust flows into the condenser to release heat to the heat sink after driving the expander to generate electricity. The first ORC prototype can be traced back to 1826, when Howard experimentally investigated a power cycle using ether and established the principle of ORC technology.įinally, the liquid fluid is discharged from the condenser into the working fluid pump to be pressurized. The ORC has experienced a much more robust development due to economic incentives and surging energy prices since the 1970s. Some reviews focused on the development of the architectures, markets, technologies, and applications of the ORC system. In the ORC system, heat exchangers are vital components that absorb heat from the heat source or release heat to the heat sink. Literature studies have proven that the exergy destruction of heat exchangers accounts for 70–90% of the total exergy destruction of the ORC.
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