Chapter 7, Problem 7.34CU

Answer please

Problems 1-8 are a continuation of HW #6. All answers should have 4 or 5 significant figures. For problems 1-8 please solve for u (specific internal.energy) and h (specific enthalpy), for water (H2O), given the following information. 1. H2O, T = 150°C, P = 50 bar 2. H2O, T = 200°C, P = 10 bar 3. H20, T = 120°C, v = 0.5000 m3/kg 4. H20, P = 5 bar, u = 0.7000 m/kg

7.36 At steady state, hot gaseous products of combustion from a gas turbine cool from 3000°F to 250°F as they flow through a pipe. Owing to negligible fluid friction, the flow occurs at nearly constant pressure. Applying the ideal gas model with ₂ = 0.3 Btu/lb/ºR, determine the exergy transfer accompanying heat transfer from the gas, in Btu per lb of gas flowing. Let T. = 80°F and ignore the effects of motion and gravity. -568.43

a) Using the second law of thermodynamics, describe exergy d law of thermodynamics, describe exergy. Explain the different types of exergy b) What do you understand by the term reference environme c) Determine the specific exergy of saturated water vapour we having a velocity of 30m/s and an elevation of 6m, each relative to an exergy reference environment where T = 298K. P. = 1 atm and g = 9.8m/s.  d) Steam enters a turbine with a pressure of 30 bar, a temperature of 400°C, a velocity of 160 m/s and exits as saturated vapor at 100°C with a velocity of 100 m/s. At steady state, the turbine develops work at a rate of 540 kJ per kg of steam flowing through the turbine. The heat transfer rate (cv/m = -22.6 – Heat transfer between the turbine and its surroundings occurs at an average outer surface temperature of 350 K. Neglect the change in potential energy between the inlet and exit of the turbine, and assume that To = 25°C. Po =1 atm. Using a neat sketch, determine: i net exergy carried…

EXERGY TRANSFER BY HEAT, WORK, AND MASS

i) Describe what is threshold problems? ii) Figure 1 illustrates a composite curve for a set of process stream data. With the aid of a diagram, explain what will happen to the utility consumptions if AT min is further reduced until AT min < AT threshold: 200 180 Qn 160 140 120 100 AT threshold 80 60 40 20 50 100 150 200 250 300 350 H (KW) Figure 1 TEMPERATURE (°C)

answer 89

Solve the answer fast.... And hand written solution please.

Please solve by hand and correct answer please