A regenerative organic Rankine cycle (RORC) is modeled and optimized for the use of waste heat recovery from a prime mover (PM). Three PMs including, a diesel engine, a gas engine, and a microturbine are selected in this study. Four refrigerants including isobutane, R123, R134a, and R245fa are selected. The nominal capacity of the PM, PM operating partial load, turbine inlet pressure, condenser...

The startup process occurs frequently for pumped storage units. During this process, the rotating rate that changes rapidly and unsteady flow in runner cause complex dynamic response of runner, sometimes even resonance. sharp rise stress large-amplitude stresses will greatly shorten fatigue life. Thus, study start-up turbine mode is critical to safety operation. This paper introduced a method c...

prior experimental and theoretical background of the banki water turbine has been briefly presented. theoretical values of unit quantities have been compared with published experimental data as well as data obtained in the hydraulic lab at the university of tehran; from which, shortcomings of the existing theory in predicting the turbine performance has been highlighted. factors responsible for...

This study aims to build a dynamic model of direct steam generation (DSG) solar power system coupled with accumulator meet electricity demands for hospital under transient environmental conditions in Libya. The main components the are DSG parabolic trough collectors, accumulator, turbine, condenser and circulation pump. is modelled via using Simulink\Simscape software blocks integrated MATLAB f...

Abstract Renewable sources of energy are on the rise and will continue to increase coming decades [1]. A common problem with renewable is that they rely effects which cannot be controlled, for instance strength wind or intensity sunlight. The ALPHEUS Horizon 2020 EU project has aim develop a low-head hydraulic pump-turbine can work as grid stabilising unit. This presents numerical results an in...

Abstract A larger part of the electricity is today from intermittent renewable sources energy. However, energy production such varies in time. Energy storage one solution to compensate for this variation. Today pumped hydro (PHS) most common form storage. Usually, it requires a large head, which limits where can be built. In EU project ALPHEUS, PHS technologies low- ultra-low heads are explored...