2.A system consisting of 1 lb of water undergoes a power cycle composed of the followingprocesses:Process 1-2: Isothermal expansion from a saturated liquid to a saturated vapor atp= 1000 lbf/in.?Process 2-3: Isochoric cooling to p3 = 100 lbf/in.?Process 3-4: Isobaric and isothermal compressionProcess 4-1: Isochoric heatinga.Sketch the cycle on a T-v diagram, and label the states.b.Sketch the cycle on a p-v diagram, and label the states.Complete the following chart for system properties at the various states:с.Statep (lbf/in.?)x (quality)v (ftAb)13.4The net work of a cycle is given by the integral of p dV over the entire cycle. This meansthat the net work can be found by calculating the area enclosed by the cycle on a p-v diagram.Find the net work of this cycle in BTU by calculating the area enclosed by the cycle on yourp-v diagram from part b (the values from part c might help).d.A refrigerator draws a steady 0.25 kW of power while rejecting energy by heat transfer to thesurroundings at a rate of 1.1 kW.3.a.Determine the rate at which energy is removed by heat transfer from the refrigeratedspace, in kW.Determine the refrigerator's coefficient of performance.The convective heat transfer coefficient h = 7 W/(m² · K), and the temperature of the airin the room is 25°C. If the condenser coil is meant to remain below 90°C for safety (acompletely made-up safety temperature), how much surface area must the coil have exposed?Page 3 of 3

As per the rule, I can solve only first three subparts of the first question. For rest question,…

A system consisting of 1 lb of water undergoes a power cycle composed of the following processes: 2. Process 1-2: Isothermal expansion from a saturated liquid to a saturated vapor at p = 1000 lbf/in.? Process 2-3: Isochoric cooling to p3 Process 3-4: Isobaric and isothermal compression Process 4-1: Isochoric heating 100 lbf/in.? Sketch the cycle on a T-v diagram, and label the states. Sketch the cycle on a p-v diagram, and label the states. Complete the following chart for system properties at the various states: a. b. с.

A system consisting of 1 lb of water undergoes a power cycle composed of the following processes: 2. Process 1-2: Isothermal expansion from a saturated liquid to a saturated vapor at p = 1000 lbf/in.? Process 2-3: Isochoric cooling to p3 Process 3-4: Isobaric and isothermal compression Process 4-1: Isochoric heating 100 lbf/in.? Sketch the cycle on a T-v diagram, and label the states. Sketch the cycle on a p-v diagram, and label the states. Complete the following chart for system properties at the various states: a. b. с.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

a.) What is the maximum thermal efficiency for a heat cycle with TC = 500°R and TH = 700°R? b.) Now, what is the maximum coefficient of performance for a heat cycle with TC = 500°R and TH = 700°R?
Ts diagrams for two reversible thermodynamic power cycles are shown in the following fig- ure. Both cycles operate between a high temperature reservoir at 500 K and a low temperature reservoir at 300 K. The process on the left is the Carnot cycle described in Section 2.9. The process on the right is a Brayton cycle, which is similar to a Carnot cycle, except that the two steps (state 1 to state 2) and (state 3 to state 4) are at constant pressure. Which cycle, if either, has a greater efficiency? Explain.
1. An engine with a cylinder volume of 250 cc and a volume at top dead centre of 25 cc uses a thermal cycle where the initial stage is an isentropic adiabatic compression process with the equation pvY = C. It is known that the initial conditions are 1 bar and 30°C. After that, a combustion process takes place in which heat is supplied at a constant volume. The heat given is 80 KJ/kg and if the specific heat at constant volume is known to be 0.718 kJ/kg K, determine the maximum temperature and pressure that occur? 2. Air with a mass of 3 kg is heated at constant volume from 25°C to 120°C. The process then takes place at constant pressure so that the gas has a temperature of 550°C. Determine the heat required and the entropy change that occurs during the process? (Air: Cp = 1.005 kJ/kg.K and y = 1.4; and assume Cp does not change with temperature). Known that initial volume is 50 ml and the last volume is 300 ml.
Consider a Carnot engine with the following parameters: a. It contains 0.650 mol of water vapor, that behaves ideally. (Water vapor is a nonlinear molecule). b. The temperature of the hot reservoir is 1200 K, while the temperature of the cold reservoir is 400 K. c. The engine starts in 1.00 bar, and the first step quarters this pressure. What is the efficiency of such engine? If a heat pump is attached to this engine, what would be its efficiency? If a refrigerator is attached to this engine, what would be its efficiency? Compute for q, w, AU, AH and AS for each step, and for the whole cycle.
1. A Carnot power cycle operates on 2lb/min of air between the limits of 70F and 500 F. The pressure at the beginning of isothermal expansions is 400 psia and at the end of isothermal expansion 185.psig, determine; a. The volume at the end of the isothermal compression b. AS during an isothermal process c. Qa, Qr, Wnet d. Thermal efficiency e. The mean effective pressure.
ratio. B-Correct the wrong sentences: 1. A heat engine is a system operating in a complete cycle and supply heat from work input. 2. Enthalpy refers to degree of disorder or randomness in the system. 3. The thermal efficiency for Otto cycle depends on the pressure ratio and temperatures. 4. In dual combustion cycle, the heat supply at constant pressure only. 5. Since entropy is a property, therefore the change of entropy depends on the process itself.
Figure on the right provides steady-state operatingdata for an ideal vapor-compression refrigeration cycle withRefrigerant 134a as the working fluid. The mass flow rate ofrefrigerant is 30.59 lb/min. Sketch the T–s diagram for thecycle and determinea) the compressor power, in horsepower.b) the rate of heat transfer, from the working fluid passingthrough the condenser, in Btu/min.c) the coefficient of performance.
104#1. an ideal gas with R=0.062 BTU/lbm-degree R and Cv=0.158 BTU/lbm-degree R undergoes athree process cycle in a cklose system. from the initial state of 20 psia and 570degree R, the gas is compressed at coinstant pressure to 1/5 of its initial volume, process 1-2; it is then heated isochrocally to state 3, process 2-3; and finally, it expands polytopically with index n=1.5 back to its initial state, process 3-1. determine the pressure, specific volumes and temperatures at cardinal points around the cycle and the cycle thermal efficiency.
A steam power plant operates on the cycle given below. T 3' For the following set of operating conditions, determine the steam rate, the heat-transfer rates in the boiler and condenser, and the thermal efficiency of the plant. (For data, use the steam table.) P = P2 = 7000 kPa; T2 = 550°C; P3 = P4 = 20 kPa; n(turbine) = 0.75; n(pump) = 0.75; power rating = 100000 kW. The steam rate is |kg-s-1. The heat-transfer rate in the boiler is MW. The heat-transfer rate in the condenser is |MW. The thermal efficiency of the plant is
2. The maximum thermal efficiency possible for a power cycle operating between 1200°F and 225°F is: The answer is 58.73%, show the solution and draw a diagram.
Q2: A closed Gas turbine unit operating within below temperatures and pressures. Determine the heat supplied; the power output; work ratio; and the cycle efficiency. Compressor ti-20 °C Pi 1 bar mar = 5 kg/s P:= 7 bar t-760 °C Combustion chamber Cooler Turbine HOA W₁=?
Problem 1 A power cycle operating between two reservoirs receives energy Qn by heat transfer from a hot reservoir at TH 1888 K and rejects energy Oc by heat transfer to a cold reservoir at Tc=377 K. For each of the following cases determine whether the cycle operates reversibly, irreversibly, or does not verify the second aw of thermodynamics (make all necessary calculation for each case): %3D a) QH=1700 kJ and Wrcle = 1600 b) QH=702 kJ and Qc= 351 kJ c) =94 % d) QH=1700 kJ and Wcl= 1800 kl %3D %3D