Problem 1 (P2.5 in Jaluria text book)) The condensers of a 500 MW power plant op

Question

Problem 1 (P2.5 in Jaluria text book)) The condensers of a 500 MW power plant operating at a thermal efficiency of 30% are to be cooled by the water from a nearby lake, as sketched in Figure 1.14(a). If the intake water is available at 20°C and if the temperature of the water discharged back into the lake must be less than 32°C, quantify the design problem for the cooling system. How is the net energy removed from the condensers finally lost to the environment?

Explanation / Answer

using the temperatures and we know that is always liquid water, so we use the enthalpy satured of water, with talbs

h1=83.86 kj/kg, s1=0.2963

h2=134.021 kj/kg (this is ideal)

0.3=((h2-h1)/(h2a-h1))

h2a= 251.063 KJ/kg

so the enery lost is

h2a-h1=117.042 KJ/kg

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.