Advances in heat pump systems: A review

KJ Chua, SK Chou, WM Yang - Applied energy, 2010 - Elsevier
Heat pump systems offer economical alternatives of recovering heat from different sources
for use in various industrial, commercial and residential applications. As the cost of energy …

An updated review of recent advances on modified technologies in transcritical CO2 refrigeration cycle

B Yu, J Yang, D Wang, J Shi, J Chen - Energy, 2019 - Elsevier
With carbon emission levels on the rise, rapid and far-reaching action is needed to
counteract global warming. Among many available strategies, CO 2 is nowadays more and …

A review of transcritical carbon dioxide heat pump and refrigeration cycles

Y Ma, Z Liu, H Tian - Energy, 2013 - Elsevier
As a natural refrigerant, carbon dioxide is safe, economic and environmentally sustainable
which can be used in heat pump and refrigeration systems especially in transcritical cycles …

Transcritical carbon dioxide heat pump systems: A review

BT Austin, K Sumathy - Renewable and sustainable energy reviews, 2011 - Elsevier
Carbon dioxide is a safe, economic and environmentally sustainable refrigerant which can
be used in heat pump and refrigeration systems. Research into the performance and …

Optimization of a multistage vapor-compression refrigeration system for various refrigerants

SS Baakeem, J Orfi, A Alabdulkarem - Applied Thermal Engineering, 2018 - Elsevier
This work focuses on theoretical investigation of the performance of a multistage vapor-
compression refrigeration system using energy, exergy and economic analysis. The system …

Performance analysis of different high-temperature heat pump systems for low-grade waste heat recovery

XQ Cao, WW Yang, F Zhou, YL He - Applied thermal engineering, 2014 - Elsevier
Different heat pump systems were used to recover the heat from waste water with mean
temperature of 45° C and produce hot water with the temperature up to 95° C. Those …

Thermodynamic performance evaluation of transcritical carbon dioxide refrigeration cycle integrated with thermoelectric subcooler and expander

B Dai, S Liu, K Zhu, Z Sun, Y Ma - Energy, 2017 - Elsevier
New configurations of transcritical CO 2 refrigeration cycle combined with a thermoelectric
(TE) subcooler and an expander (TES+ EXP HM and TES+ EXP ML) are proposed. The …

Experimental analysis of R744 parallel compression cycle

A Chesi, F Esposito, G Ferrara, L Ferrari - Applied Energy, 2014 - Elsevier
A diffuse interest on cycle modifications for R744 applications that allow to achieve better
CO 2 cycles performance can be inferred from the literature. The parallel compression cycle …

Power-to-gas leverage effect on power-to-heat application for urban renewable thermal energy systems

B Nastasi, GL Basso, DA Garcia, F Cumo… - International Journal of …, 2018 - Elsevier
Abstract High Renewable Energy Sources (RES) share in energy systems entails
environmental advantages in its use but drawbacks in its distribution, management and …

Field test and optimization of heat pumps and water distribution systems in medium-depth geothermal heat pump systems

J Deng, S He, Q Wei, J Li, H Liu, Z Zhang, H Zhang - Energy and Buildings, 2020 - Elsevier
The medium-depth geothermal heat pump systems (MD-GHPs) use vertical concentric deep
borehole heat exchangers (DBHEs) with depth more than 2 km to extract heat from medium …