heater AT20K pp @warm end reheater T 20 K pp @ warm end hot heat transfer fluid
ID: 2250401 • Letter: H
Question
heater AT20K pp @warm end reheater T 20 K pp @ warm end hot heat transfer fluid from field Tatti,-288"C hpt ipt high-pressure turbine p0.81 low-pressure turbine 0.78 pump 0.6 recuperator condenser pp @ cold-end AT 15 K a35°C A solar trough power plant is a Rankine cycle that uses solar energy as its heat input. Solar energy is focused by parabolic trough receivers onto a pipe that carries a heat transfer fluid, as shown in Figure 1. The heat transfer fluid is heated as it flows through the field and then returns to the power plant. The fluid transfers heat to the working fluid of the power plant in order to provide the thermal energy that drives the power cycle, which is shown in the problem sketch. The heat transfer fluid leaves the field and enters the power plant at Thifin 288'C. Some of the fluid enters the heater where it heats the working fluid for the cycle. Because the working temperature for the cycle is so low, water is not a very efficient working fluid. Instead, toluene is used in the cycle. The pinch point in the heater is at the warm end and the heater approach temperature difference is ??.-20 K. After the heater, the toluene enters the high-pressure turbine at P- Phigh 1034 kPa and is expanded to P2 Prh 250 kPa. The efficiency of the high-pressure turbine is Tht 0.81. The remainder of the heat transfer fluid enters the reheater where it reheats the toluene leaving the high-pressure turbine. The pinch point in the reheater is at the warm end and the reheater approach temperature difference is ??7a-20 K The toluene leaving the reheater passes through the low-pressure turbine, which has an efficiency of Tipt 0.78. The toluene exits the low-pressure turbine at the condensing pressure, which is set so that the toluee leaving the condenser is saturated liquid. The condenser rejects heat to the ambient, Tamb35°C, and has an approach temperature difference of ??,-15 K. The toluene is pumped back up to Phigh in a pump with efficiency Th-0.6. After exiting the pump, the purpose of the recuperator is to pre-heat the toluene before it reaches the heater toluene enters a recuperator. The using the hot exhaust from the low-pressure turbine. The recuperator pinch point is at the cold-end and the recuperator approach temperature difference is ? = 20 K. Neglect the pressure drop through the heater, reheater, recuperator, and condenser. Perform your analysis on per unit mass flow basis. a. Determine the power produced by and the rate of entropy generation in the low-pressure turbine b. Determine the power required by and the rate of entropy generation in the pump. c. Determine the rate of heat transfer from the low-pressure stream to the high pressure stream and the rate of entropy generation in the recuperator. d. Determine the power produced by and the rate of entropy generation in the high-pressure turbine. e. Determine the rate of heat transfer and the rate of entropy generation in the heater f. Determine the rate of heat transfer and the rate of entropy generation in the reheater g. Determine the rate of heat transfer and the rate of entropy generation in the condenserExplanation / Answer
The answer of following question is as follows.
The power produced is 890 kw.
Power required is 760kw.
Rate of heat transfer is 657 kj
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.