conceptual design of a waste heat recovery cycle is carried out in attempt to enhance the thermal efficiency of a steam power plant. in the recovery system, super-critical an co2 is employed as the working fluid operating in a brayton cycle. low grade heat rejected by the flue gases through the stack is used as the primary heat source, while a secondary heat exchanger utilizes the hot gases lea...

Reducing CO2 emission and lowering the concentration of greenhouse gases in the atmosphere has quickly become one of the most urgent environmental issues. While a variety of technologies and methods have been developed, the separation of CO2 from gas streams is still a critical issue. Apart from establishing new techniques, the exploration of membrane materials with high separation performance ...

reducing co2 emission and lowering the concentration of greenhouse gases in the atmosphere has quickly become one of the most urgent environmental issues. while a variety of technologies and methods have been developed, the separation of co2 from gas streams is still a critical issue. apart from establishing new techniques, the exploration of membrane materials with high separation performance ...

Environmentally speaking, of assorted widely-used refrigeration systems, the trans-critical CO2 system is one of the potential competitors. In this research, a horizontal semi-hermetic rolling piston compressor is developed for trans-critical CO2 cycle. This paper also presents a series of mathematical simulation models to identify the main factors influencing compressor’s performance. Based up...

The imprecision in prescribing of enteral nutrition in critically ill patients must result in occasions of overfeeding as well as underfeeding. Overfeeding could cause increased CO2 production and thus increased work of breathing and prolonged ventilator dependence. This possibility is supported by the limited relevant literature. We examined this possibility mathematically using the data in Th...

The effects of CO2-water-rock interactions on the mechanical properties of shale are essential for estimating the possibility of sequestrating CO2 in shale reservoirs. In this study, uniaxial compressive strength (UCS) tests together with an acoustic emission (AE) system and SEM and EDS analysis were performed to investigate the mechanical properties and microstructural changes of black shales ...

The ternary system H2O-NaCl-CO2 is one of the most important fluid systems in geochemistry and petrology. However, there is little information on the phase equilibrium and PVT properties in this system at salinities above 6 wt.% NaCl. In this study, PVTX data were obtained experimentally by using the synthetic fluid inclusion technique in conjunction with conventional microthermometry and a hyd...