The steam generator in a sodium-cooled reactor power plant receives sodium at the rate of 10 x 106 lbm/hr. The sodium temperatures are 600 and | 1000°F. 800°F steam is generated at 1,000 psia from feedwater at 340°F necessary reactor output in Mw(t) Assuming no heat losses, find the temperature difference at the pinch point in the generator. (ep for Na = 0.3.)

It is known that pinch point temperature difference is defined as the difference between the temperature of exhaust existing the evaporator and the temperature of water evaporation.

[tex]\Delta T_{p.p}[/tex] = Exhaust existing the evaporator temperature - Temperature of water evaporation

Since, it is given that exhaust existing the evaporator temperature = [tex]1000^{o}F[/tex]

Temperature of water evaporation = [tex]800^{o}F[/tex]

Hence, calculate [tex]\Delta T_{p.p}[/tex] using the above formula as follows.

[tex]\Delta T_{p.p}[/tex] = Exhaust existing the evaporator temperature - Temperature of water evaporation

= [tex]1000^{o}F[/tex] - [tex]800^{o}F[/tex]

= [tex]200^{o}F[/tex]

Thus, we can conclude that the temperature difference at the pinch point in the generator is [tex]200^{o}F[/tex].