As shown in the figure below, a reversible power cycle receives energy QH by heat transfer from a hot reservoir at TH and rejectsenergy Qc by heat transfer to a cold reservoir at Tc.Hot reservoirat THBoundary-Cold reservoir 20at Te(a) If TH = 1100 Kand Tc = 400 K, what is the thermal efficiency?(b) If TH = 500°C, Tc= 20°C, and Weycle = 1800 kJ, what are QH and Qc, each in kJ?(c) If n = 70% and Tc= 40°F, what is TH, in °F?(d) If n = 40% and TH = 1027°C, what is Tc, in °C?

A heat engine absorbs heat from the hot reservoir and rejects the heat to the cold reservoir after…

Answered: As shown in the figure below, a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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An ideal gas undergoes a reversible clockwise cycle shown in Fig 1c.i (from state P1, V1 back state P1, V1). What work is done on the gas in this cycle? What work is done on the gas if this cycle travels anticlockwise? (P1, V,) (P, V2) (P2, V;) (P,, V2) V Figure 1c.i If P = 2.0 x 105 Pa, P2 = 1.0 x 105 Pa, V, = 1.0 x 10-3 m3 and V2 = 2.0 x 10-3 m³, how much work is done on the gas in traversing the cycle clockwise 50 times? P.
As shown in the figure below, a reversible power cycle receives energy QH by heat transfer from a hot reservoir at TH and rejects energy Qc by heat transfer to a cold reservoir at Tc. Hot reservoir at TH Boundary- Weycle Cold reservoir2c at Te (a) If TH = 600 Kand Tc = 400 K, what is the thermal efficiency? (b) If TH = 500°C, Tc = 20°C, and Weycle = 200 kJ, what are QH and Qc, each in kJ? (c) If ŋ = 50% and Tc = 40°F, what is TH, in °F? (d) If n = 40% and TH = 427°C, what is Tc, in °C?
Derive the formula of efficiency of the following: d. Brayton Cycle in terms pressure ratio rp and specific heat ratio k.
10. A thermodynamic cycle using water is shown on the T-s diagram of Figure 7.26. Calculate the coefficient of performance for this cycle using the equation h, – h, COP = (h, – he) – (h, – hɔ) State A State B State C State D X = 1.00 P = 300. psia X = 0.00 Po = 10.0 psia P = 10.0 psia The processes are A → B = isentropic compression, B → C = isobaric expansion, C →D= isentropic expansion, D - A = isothermal compression. FIGURE 7.26
4 An air nozzle has an efficiency of .90 and is adiabatic. air enters at p1=200 kPa, T1=1300 K with negligible velocity. air exits at p2=130 kPa. use dead state variables of T0=293 k and P0= 100 kPa and a variable heat capacity. what is t2 and the rate of exergy destruction?
Consider a refrigerator and a heat pump working on the reversed Carnot cycle between the same temperature limits. Which of the following is correct? (a) COP of refrigerator = COP of heat pump (b) COP of refrigerator = COP of heat pump + 1 c) COP of refrigerator = COP of heat pump -1 (d) COP of refrigerator = Inverse of the COP of heat pump %3D %3D %3D %3D
A heat engine An engine that converts power from heat operating at a steady-state receives energy by heat transfer at a rate of Qu at TH = 1200 K and rejects energy by heat transfer to a cold reservoir at a rate Qc at Tc= 360 K. (i) Calculate the Carnot cycle efficiency (ii) For each of the following cases, analyze and determine whether the cycle operates reversibly, operates irreversibly, or is impossible. (a) QH = 720 kW, Qc = 144 kW (b) QH = 720 kVW, Wcycle = 360 kW, Qc = 288 kW (c) Wcycle = 714 kW, Qc = 306 kW (d) QH = 920 kW, Qc = 368 kW
What is the best coefficient of performance for a refrigerator that cools an environment at -R, °C and has heat transfer to reservoir at 150.0°C? (b) How much work in joules must be done for a heat transfer of 4186 kJ from the cold environment? (c) What is the cost of doing this if the work costs 0.1 Rs per 3.60 × 10° J (a kilowatt-hour)? (d) How many kJ of heat transfer occurs into the warm environment? where, R, is last two digits of registration no. (e.g. for registration no. 11603309 take R¡ as 9 °C
Shown below is P-V diagram for a reversible cycle enclosed by 4 reversible process curves. The curve 1-2 and the curve 3-4 are reversible isothermal processes, and the curve 2-3 and the curve 1-4 are reversible adiabatic processes. If the cycle direction is counter clockwise, answer the question below. Select curve(s) which represent process(es) having heat interactions?____ A. curve 1-2 B. curve 2-3 C. curve 1-4 D. curve 3-4
1. Consider the following heat engines operating between 1200K and 300 K. For each case determine whether the heat engine operates reversibly, operates irreversibly, or is impossible. a. QH = 850 kJ, Qc = 300 kJ, Wnet = 550 kJ, %3| b. QH = 900 kJ, Qc = 400 kJ, Wnet = 550 kJ, %3D c. QH = 700 kJ, Qc = 140 kJ, Wnet = 560 kJ, d. QH = 800 kJ, Qc = 200 kJ, Wnet = 600 kJ.

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