Life cycle techno-enviro-economic assessment of dual-temperature evaporation transcritical CO2 high-temperature heat pump systems for industrial waste heat recovery

Thermo-economic assessment and optimization of a geothermal-driven tri-generation system for power, cooling, and hydrogen production

Preliminary study on the feasibility assessment of CO2 booster refrigeration systems for supermarket application in China: An energetic, economic, and environmental analysis

Analysis of the optimal gas cooler pressure of a CO2 heat pump with gas bypass for hot water generation

A new heat supply strategy for CO2 capture process based on the heat recovery from turbine exhaust steam in a coal-fired power plant

Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit

A multi-objective peak regulation transaction optimization and benefits coordination model for multi-sources coupling system considering flexible load response

The performances of two-stage compression CO2 transcritical cycle with R290 mechanical subcooling unit are analyzed. The overall COP variation with the compressor discharge pressure and the subcooling degree are discussed in detail. With the increase in subcooling degree and compressor discharge pressure, the COPs of the SMS, OTLMS, OTHMS, TTLMS, and TTHMS system increase first and then decrease. Under the working condition of optimal discharge pressure and optimal subcooling degree, TTHMS shows obvious advantage in COP over the system with no subcooling under the same working condition. When the evaporation temperature is -30 °C, COP of TTHMS is improved by 22.35%. When the ambient temperature is 40 °C, COP of TTHMS is 1.51 higher than that without mechanical subcooling. The COP of SMS system reaches up to 4.26, which is 22.19% higher than that of OTHMS at the evaporation temperature of 10 °C. At an ambient temperature of 35 °C, the COP of TTHMS is 2.15, which is 64.82% higher than that of OTHMS. The power consumption ratio of SMS is significantly higher than those of other systems and the highest power consumption ratio is 29.98%.

http://www.dpi-proceedings.com/index.php/dteees/article/download/27914/27323

Jiayu Li

Papers

Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit

A multi-objective peak regulation transaction optimization and benefits coordination model for multi-sources coupling system considering flexible load response

Performance Analysis of Two-stage Compression CO2 Transcritical Cycle with R290 Mechanical Subcooling Unit