Theoretical study of a high-temperature heat pump system composed of a CO 2 transcritical heat pump cycle and a R152a subcritical heat pump cycle

Entransy—A physical quantity describing heat transfer ability

Zeng-Yuan Guo, Hongye Zhu, Xingang Liang · International Journal of Heat and Mass Transfer · 2007 · 851 citations

Engineering, Mechanical Engineering, Physics +11

Optimization of a transcritical CO2 heat pump cycle for simultaneous cooling and heating applications

Jahar Sarkar, Souvik Bhattacharyya, M. Gopal · International Journal of Refrigeration · 2004 · 384 citations

Engineering, Architectural Engineering, Mechanical Engineering +16

A correlation of optimal heat rejection pressures in transcritical carbon dioxide cycles

Shengming Liao, Tianshou Zhao, Arne Jakobsen · Applied Thermal Engineering · 2000 · 358 citations

Natural Sciences, Mechanical Engineering, Physics +10

Two-stage air-source heat pump for residential heating and cooling applications in northern U.S. climates

Stefan S. Bertsch, Eckhard A. Groll · International Journal of Refrigeration · 2008 · 335 citations

Engineering, Architectural Engineering, Mechanical Engineering +17

CO2-heat pump water heater: characteristics, system design and experimental results

Petter Nekså, Håvard Rekstad, Golbon Zakeri et al. · International Journal of Refrigeration · 1998 · 327 citations

Engineering, Mechanical Engineering, Energy Systems +15