Energy and Exergy Analysis of Organic Rankine Cycle (ORC) using Different Eco-Friendly Organic Fluids
In modern days technology, organic Rankine cycle proved as a promising methodology which can provide the effective recovery of waste heat. The main sources of heat for the organic Rankine cycle are mainly medium to low temperature heat sources. The main role performed by ORC is to transform the low-grade energy into its useful form. The present study investigated the performance of various eco-friendly organic liquids-based ORC. Liquids of interest include n-pentane, n-hexane, n-heptane, benzene, and toluene. Thermodynamic analysis of the ORC is carried out by solving the mathematical equations obtained through the energy and exergy balance approach by using Engineering equation solver (EES) software. With increase of vapor generator temperature, energy and exergy efficiencies of organic Rankine cycle also increases. However, the net-work done output decreases. In contrast, with increase in condenser temperature the net-work output, energy efficiency and exergy efficiency they all show declination. Additionally, considering all the five organic working fluids, the value of their net-work done hikes with escalation in mass flow rate of flue gas. Meanwhile, the energy and exergy efficiencies of all these fluids remain constant throughout the process.
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