In an ideal steam regenerative Rankine cycle with two feedwater heaters, one closed and one open, steam enters the turbine at 12.5 MPa and 550°C. Steam is extracted from the turbine at 0.8 MPa for the closed feedwater heater and at 0.3 MPa for the open feedwater heater. The feedwater is heated to the condensation temperature of the extracted steam in the closed feedwater heater. The extracted steam leaves the closed feedwater heater as a saturated liquid, which is subsequently throttled to the open feedwater heater. The extracted steam also leaves the open feedwater heater as a saturated liquid. Given hz=192.1 kJ/kg, hs=727.83 kJ/kg, h1=2100 kJ/kg, determine (a) ig/mg = y =? (b) m10/iɛ =z=? (c) work produced by the turbine per kg of steam entering the turbine, and (d) the equation to calculate exergy destruction for the turbine per kg of steam entering the turbine (no calculation required).
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
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