1. An executive of a company “Perpetual Turbines” claims that his engineers have designed a steam...
1. An executive of a company “Perpetual Turbines” claims that
his engineers have designed a steam turbine with the following
parameters:
• inlet conditions: T = 500◦C and p = 6MPa;
• outlet conditions: p = 0.1MPa;
• work performed by the turbine per 1kg of steam is w = 1200kJ/kg;
• turbine is adiabatically isolated.
Evaluate:
(a) specific enthalpy at the inlet and outlet of the turbine;
(b) phase descriptions of the steam entering and leaving the
turbine (e.g., superheated vapor, saturated vapor, saturated
mixture, etc.);
(c) quality x of the steam leaving the turbine;
(d) specific entropy of the steam at the inlet and outlet of the
turbine;
and
(e) based on your results, explain why the company “Perpetual
Turbines” cannot be trusted.
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1. An executive of a company “Perpetual Turbines” claims that
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The figure shows a schematic of a power plant that has two steam turbines. The water (the working fluid for the plant) leaves the high pressure turbine (HPT) as saturated vapour at 1000 [kPa]. Part of this flow is diverted to an insulated heat exchanger, which we hot airstream to create superheated steam that enters the low pressure turbine (LPT). The air mas flow rate is 19.5 k/s and the air temperature drops from 1100 to 6001 as it goes...
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