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Regenerative Rankine cycle. The regenerative Rankine cycle is so named because after emerging from the condenser (possibly as a subcooled liquid) the working fluid is heated by steam tapped from the hot portion of the cycle. On the diagram shown, the fluid at 2 is mixed with the fluid at 4 (both at the same pressure) to end up with the ...
T-s diagram for the ideal/real ORC. The working principle of the organic Rankine cycle is the same as that of the Rankine cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine, [3] screw, [4] scroll, [5] or other expander), and then through a condenser heat exchanger where it is finally re-condensed.
Ts diagrams of subcritical (yellow), transcritical (blue) and supercritical (red) power cycles Plant layouts of transcritical power cycles (top left), supercritical power cycles (top right), subcritical power cycles (bottom) As in any power cycle, the most important indicator of its performance is the thermal efficiency. The thermal efficiency ...
Working fluids are often categorized on the basis of the shape of their T–s diagram. An isentropic process is depicted as a vertical line on a T–s diagram, whereas an isothermal process is a horizontal line. [2] Example T–s diagram for a thermodynamic cycle taking place between a hot reservoir (T H) and a cold reservoir (T C).
The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.
Cycle Isentropic step Description Ideal Rankine cycle: 1→2: Isentropic compression in a pump: Ideal Rankine cycle: 3→4: Isentropic expansion in a turbine: Ideal Carnot cycle: 2→3: Isentropic expansion Ideal Carnot cycle: 4→1: Isentropic compression Ideal Otto cycle: 1→2: Isentropic compression Ideal Otto cycle: 3→4: Isentropic ...
T-s diagram of a superheated Rankine cycle. The steam turbine operates on basic principles of thermodynamics using the part 3-4 of the Rankine cycle shown in the adjoining diagram. Superheated steam (or dry saturated steam, depending on application) leaves the boiler at high temperature and high pressure. At entry to the turbine, the steam ...
The liquid–liquid critical point of a solution, which occurs at the critical solution temperature, occurs at the limit of the two-phase region of the phase diagram. In other words, it is the point at which an infinitesimal change in some thermodynamic variable (such as temperature or pressure) leads to separation of the mixture into two ...