Alternative Approach For Thermal Analysis Of Transcritical Co2 One-Stage Vapor Compression Cycles

Abstract

In this paper, an application artificial neural network (ANN) is presented to estimation the coefficient of performance (COP) in the transcritical CO2 one-stage vapor compression cycles. The thermodynamic properties of the transcritical CO2 one-stage vapor compression cycles were obtained from CoolPack program. The obtained data were used for training and testing artificial neural network. The results of the ANN are compared with the actual data. The coefficient of multiple determination (R2) value was obtained as 0.99907 for the coefficient of performance (COP), which is very satisfactory. A new formulation was derived for the determination of the coefficient of performance (COP) in the transcritical CO2 one-stage vapor compression cycles

Keywords

• the coefficient of performance, transcritical, CO2, vapor compression cycles, ANN

References

1. [1] Shin, E., Park, C., Cho, H., Theoretical analysis of performance of a two-stage compression CO2 cycle with two different evaporating temperatures. International journal of refrigeration, 47, 164- 175, 2014.
2. [2] Ahammed, E., Bhattacharyya, S., Ramgopal, M., Thermodynamic design and simulation of a CO2 based transcritical vapour compression refrigeration system with an ejector. International journal of refrigeration, 45, 177-188, 2014.
3. [3] Pérez-García, V., Belman-Flores, J.M., Navarro-Esbrí, J., Rubio-Maya, C., Comparative study of transcritical vapor compression configurations using CO2 as refrigeration mode base on simulation. Applied Thermal Engineering, 51, 1038-1046, 2013.
4. [4] Chesi, A., Esposito, F., Ferrara, G., Ferrari, L., Experimental analysis of R744 parallel compression cycle. Applied Energy, 135, 274–285, 2014.
5. [5] Ge, Y.T., Tassou, S.A., Santosa, I.D., Tsamos, K., Design Optimisation of CO2 Gas cooler/Condenser in a Refrigeration System. Energy Procedia, 61, 2311 – 2314, 2014.
6. [6] Salazar, M., Méndez, F., PID control for a single-stage transcritical CO2 refrigeration cycle. Applied Thermal Engineering, 67, 429-438, 2014.
7. [7] Selbas, R., Sencan, A., Kılıc, B., Alternative approach in thermal analysis of plate heat exchanger. Heat Mass Transfer, 45, 323–329, 2009.
8. [8] Dincer, K., Tasdemir, S., Baskaya, S., Ucgul, İ., Uysal, B.Z., Fuzzy Modeling of Performance of Counterflow Ranque-Hilsch Vortex Tubes with Different Geometric Constructions. Numerical Heat Transfer Part B: Fundamentals, 49, 51- 54, 2008.