Thermodynamic analysis of an improved two-stage multi-intercooling transcritical CO2 refrigeration cycle

چکیده مقاله

Performance of a two-stage multi-intercooling trans-critical CO2 refrigeration cycle containing internal heat exchanger, two intercoolers, ejector, and separator, has been analyzed after modification. In the present study, an internal heat exchanger has been included within this cycle for possible improvement in its cooling performance. The impacts of operational parameters such as gas cooler and evaporator temperatures and pressure of gas cooler, on cycle performance have been investigated. Computed results showed that modified cycle improved the maximum coefficient of performance, COPmax, by 20.58% compared to the internal heat exchanger two-stage TRCC cycle and 23.2% compared to multi-intercooling two-stage TRCC cycle with ejector expansion device.