Engineering, 17.04.2020 16:19 dinosaur10

A 250-MW vapor dominated hydrothermal powerplant uses well steam that is saturated at 450 psia at shutoff. The steam is throttled to a turbine inlet pressure of 140 psia. A direct-contact condenser operates at a pressure of 5 psia with a cooling-water inlet temperature of 48°F. The turbine polytopic efficicency is .8 and the turbine-generator combined mechanical-electrical efficiency is .90. Calculate

(a) the steam mass flow rate, in pounds mass per hour,
(b) the condenser cooling water mas flow rate, in pounds mass per hour
(c) the cycle thermal efficiency and heat rate, in BTUs per kilowatt hour, and
(d) the difference between well flow and disposal flow, in pounds mass per hour, if the cooling tower losses by evaporation and drift are 2 percent.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 08:10

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Answers: 1

Answer

Engineering, 05.07.2019 23:20

Which one of the following faults cause the coffee in a brewer to keep boiling after the brewing cycle is finished? a. an open circuit in the heating element b. a short circuit at the terminals c. welded contacts on the thermostat d. a leak around the gasket

Answers: 3

Answer

Engineering, 06.07.2019 02:30

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?

Answers: 2

Answer

Engineering, 06.07.2019 04:10

Apinion having 30 involute teeth of 6,5 module rotates at 220 r/min and transmits 2 kw to a gear wheel having 70 teeth; the addendum on both wheels is 4 of the circular pitch and the angle of obliquity is 200. determine; 3.1 the lengths of the path of approach and the arc of approach 3.2 the normal force between the teeth at an instant when there is only one pair of teeth in contact

Answers: 2

Answer

You know the right answer?

A 250-MW vapor dominated hydrothermal powerplant uses well steam that is saturated at 450 psia at sh...

Questions