Original scientific paper The development of a closed cycle gas turbine with super-critical carbon dioxide as a working fluid is under way in order to generate power from waste heat source of a low or intermediate temperature range from industry. Its demonstration test plan using a reduced scale turbomachine is described. Principal specifications follow; net power output of around 10 kWe and re...

Abstract In this paper, we (i) present a methodology for determining the aerodynamic performance of bi-directional turbomachines pumped thermal energy storage, i.e., designed to operate as compressor in one direction, and then turbine opposite (ii) carry out computations such turbomachines, (iii) propose principles conceptual design these devices. Focus is placed on using storage cycle not only...

Abstract This experimental study characterizes the interactions of axial casing grooves (ACGs) with flow in tip region an turbomachine. The tests involve same inlet overlapping rotor blade leading edge, but different exit directions located upstream. Among them, U grooves, whose circumferential outflow opposes motion, achieve a 60% reduction stall flowrate, degrade efficiency around best point ...

Energy consumption in the chemical and petrochemical industries is dominated by highly energy-intensive, high-temperature hydrocarbon cracking process. This paper offers an attractive solution to potentially decarbonise industry direct renewable electrification whilst also improving efficiency of energy transfer enhancing quality overall Controlled endothermic reactions are generated mechanical...

The design of key nonlinear systems often requires the use expensive blackbox simulations presenting inherent discontinuities whose positions in variable space cannot be analytically predicted. Without further precautions, solution related optimization problems leads to configurations which may close output functions. These betray unsafe regions space, such as resonance regions. To account for ...

background: many types of single-use blades are manufactured with different designs and materials. there have been several reports of difficulties in obtaining a view of the glottis with single-use laryngoscopes. the purpose of this prospective study was to compare the quickness and the success rate of endotracheal intubations with two different laryngoscope blades: disposable laryngoscope blad...