Turbine as a key power unit is vital to the novel supercritical carbon dioxide cycle (sCO2-BC). At same time, turbine design and optimization process for sCO2-BC complicated, its relevant investigations are still absent in literature due behavior of fluid vicinity critical point. In this regard, current study entails multifaceted approach designing optimizing radial system an 8 MW sCO2 cycle. I...

The rising environmental problems due to fossil fuels’ consumption have pushed researchers and technologists develop sustainable power systems. Due properties such as abundance nontoxicity of the working fluid, supercritical carbon (sCO2) dioxide Brayton cycle is considered one most promising technologies among various In current study, a mathematical model has been developed coded in Matlab fo...

A siphon is suggested to support cerebral blood flow but appears not to be established because internal jugular venous (IJV) pressure is close to zero in upright humans. Thus, in eleven young healthy males, IJV pressure was 9 ± 1 mmHg (mean ± SE) when supine and fell to 3 ± 1 mmHg when seated, and middle cerebral artery mean blood velocity (MCA Vmean; P < 0.007) and the near-infrared spectrosco...

Three mitochondria-encoded subunits form the catalytic core of cytochrome c oxidase, the terminal enzyme of the respiratory chain. COX1 and COX2 contain heme and copper redox centers, which are integrated during assembly of the enzyme. Defects in this process lead to an enzyme deficiency and manifest as mitochondrial disorders in humans. Here we demonstrate that COA6 is specifically required fo...

Supercritical carbon dioxide (SCO2) is widely used in many fields of energy and power engineering, such as nuclear reactors, solar thermal generation systems, refrigeration systems. In practical applications, SCO2 undergoes a cooling process significantly when it cooled near the pseudo–critical point. Because drastic variations thermo–physical properties, heat transfer characteristics fluctuate...

BackgroundA sufficient supply of oxygen is crucial to avoid hypoxic cardiac arrest and brain damage within 30 min in completely-buried avalanche victims. Snow density influences levels hypoxia hypercapnia. The goal this study was investigate the effects hypercapnia on cerebral oxygenation (ScO2) humans breathing into an artificial air pocket.MethodsEach subject breathed a closed system (air-tig...

This study aimed to investigate the potential of supercritical carbon dioxide (sCO2), organic Rankine cycle (ORC), and thermoelectric generator (TEG) systems for application in automotive exhaust waste heat recovery (WHR) applications. More specifically, this paper focuses on heavy-duty diesel engines applications such as marine, trucks, locomotives. The results simulations show that sCO2 are c...

Hybrid solar and geothermal utilisation is a promising option for effective exploitation of renewable energy sources. Concentrated power (CSP) systems with preheating are acknowledged as an attractive solution, supercritical CO2 (SCO2) cycle adopted generation thanks to the favourable properties offered by working fluid. In order further improve overall performance such systems, organic Rankine...

Enhanced geothermal systems distinguish themselves among other technologies that utilize renewable energy sources by their possibility of the partial sequestration carbon dioxide (CO2). Thus, CO2 in its supercritical form such units may be considered as better working fluid for heat transfer than conventionally used water. The main goal study was to perform techno-economic analysis different co...

BACKGROUND During caesarean section spinal anesthesia may provoke maternal hypotension that we prevent by administration of phenylephrine and/or ephedrine. Phenylephrine is however reported to reduce the near infrared spectroscopy-determined frontal lobe oxygenation (ScO2) but whether that is the case for patients exposed to spinal anesthesia is not known. OBJECTIVES To evaluate the impact of...