Thermodynamic Analysis and Optimization Design of a Molten Salt–Supercritical CO2 Heat Exchanger

The performance of a heat exchanger is directly related to the energy conversion efficiency thermal storage system, and its optimal design an important method improve exchanger. This paper uses distributed parameter analyze effect structural parameters operating on entransy dissipation rate, number, resistance, entropy production number in molten salt–supercritical CO2 concentric tube results show that rate have same trend, with parameters, as well changes jointly affected by exchange. Based above indicators, single-objective multi-objective optimization calculations were carried out. taking minimum improved objective functions, using transfer effectiveness evaluation index, better. ε value increased 41.2%, 39.5%, 40.3% compared reference individual. In optimization, function, pressure drop working fluid Compared individual, 23.5%, ΔPh ΔPc decreased 51.9% 32.5%, respectively. study provides for supercritical exchangers utilizing such entropy, which reflect irreversible loss process.