Development of Organic Rankine Cycle for Microcogeneration by Using Scroll Compressor
Abstract
ORCs are being used in low grade heat recovery applications. The Model prepared is a 1 kW ORC comprising of four main parts: evaporator, Scroll expander, condenser and feed pump. Main restriction, while designing ORC model, was to choose working fluid. Working fluid will be a refrigerant whose properties will be modified to the working conditions in which the heat recovery is carried out. A refrigerant R134a (a gas used for Household refrigeration system) has been selected as working media due to its required performance, high safety and frequent availability in Pakistan. An investigational study has been carried out on an ORC, recovering heat from hot water at a temperature ranging from 130-140°C. The scroll compressor will be used in reverse as a volumetric scroll expander to extract work from the system.
Physical Model of every equipment of the test bench has been validated. The ORC test bench has been commissioned and testing has been performed under different working conditions to understand its behavior broadly. In the last section of this thesis work, future work has been proposed for better optimization of the ORC test bench.
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