Effect of CO₂-based binary mixtures on the performance of radial-inflow turbines for the supercritical CO₂ cycles

Recently, the supercritical carbon dioxide (SCO₂) power cycle has become a hotspot in the field of energy-efficient utilization. The utilization of additives in the power cycle has been proven to be an effective way to improve the SCO₂ power cycle efficiency. As one of the core components of the system, the influence of...

Numerical investigation on the Thermal-hydraulic performance of the modified channel supercritical CO₂ printed circuit heat exchanger

Printed circuit heat exchangers (PCHE) are designed to improve heat recovery and energy saving in supercritical CO₂ (S-CO₂) power cycles. In the current study, a modified channel PCHE is proposed based on the regular straight channel and a zigzag channel. The thermal–hydraulic performance of four different types of PCHE...

Economic and environmental assessment of a CO₂ solar-powered plant with packed-bed thermal energy storage

Investigating supercritical natural fluids for efficient and clean energy production has become a trending research topic due to their technical and environmental advantages. However, on account of the supercritical operational conditions, using specially-developed components increases manufacturing prices, especially when dealing with solar...

Use of supercritical carbon dioxide for decellularization of porcine trachea in an attempt to generate a tissue-engineered tracheal substitute

Purpose: Patients with tracheal lesions that exceed half of the trachea’s total length require a tracheal substitute. Tissue engineering, using either synthetic materials or decellularized tracheal tissue, opens up new possibilities for generating tracheal substitutes. Decellularization, a procedure in which the tissue's...

Entropy generation in laminar boundary layers of non-ideal fluid flows

This paper documents a numerical study on entropy generation in zero-pressure gradient, laminar boundary layers of adiabatic non-ideal compressible fluid flows. The entropy generation is expressed in terms of dissipation coefficient $$C:\mathrm {d}$$ and its dependency on free-stream Mach number, fluid molecular complexity, and flow non...

Sustainable Production of Cannabinoids with Supercritical Carbon Dioxide Technologies

This thesis concerns the production of natural compounds from plant material for pharmaceutical and food applications. It describes the production (extraction and isolation) of cannabinoids, the active components present in cannabis. Many cannabinoids have medicinal properties but not all cannabinoids are available in the (large) quantities...

Added-value milk fat derivatives from integrated processes using supercritical technology

Milk fat has a very rich chemical composition and unique organoleptic properties. It is the only relevant natural source of short-chain fatty acids (C4 to C10), which have been associated to several health effects. Milk fat also contains a series of minor, bioactive lipids with anticarcinogenic, antidepressant and bactericidal activity. In the...

Reactions and Separations in Green Solvents

Most chemical processes involve solvents in the reaction and the separation step. These solvents give rise to a heavy environmental and economical burden. Moreover, these solvents are based on non-sustainable resources like petroleum. The aim of this thesis has been to develop a number of alternative processes based upon green (sustainable)...