Problem 1 (20 points): Consider the following piston-cylinder assembly that contains water as its workingfluid. Stops in the cylinder walls prevent the fluid volume from exceeding a maximum value of Vmax = 3.0 m³.The fluid has initial properties of P₁ = 100 kPa, V₁ = 2.00 m³, and T₁ = 125.0 °C and is subjected to input heatuntil it reaches a maximum temperature of Tƒ= 425.0 °C.Determine:(A) the final pressure, Pf(B) the total work done by the fluid, Wtotal(C) the total required heat input, QtotalQ

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Answered: Problem 1 (20 points): Consider the…

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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1- The following observations were recorded during a test on a steam condenser of counter flow: Barometer reading = 765 mmHg Vacuum reading = 710 mmHg Steam and air temperature = 35 •C Condensate temperature = 28 •C Condensate collected per hour = 2 tons Cooling water collected per hour = 60 tons Inlet cooling water temperature = 10 •C Exit cooling water temperature = 25 •C Cooling water tubes specification = Thin tubes D=2 cm ,L=5 m ,n=350, Determine: a- The vacuum efficiency. b- The condenser efficiency. c- Quality of steam x entering the condenser.
Q1- Suppose that we have two system to increase the air temperature from 17°C to 52°C and both of them operating at constant air pressure as shown in below figures. System 1: The air temperature is increased as a consequence of the stirring of a liquid surrounding the line carrying the air. T=17°C P=100 kPa Viscous Fluid T=17°C P=100 kPa System 1 System 2: The air temperature is increased by passing it through one side of a counter-flow heat exchanger. On the other side, steam condenses at a pressure of 100kPa from a saturated vapour to a saturated liquid. Saturated liquid water P=100 kPa 2 T=52°C P=100 kPa Saturated water vapour P=100 kPa System 2 2 T=52°C P=100 kPa Both systems operate under steady conditions and are sufficiently insulated to prevent significant heat transfer with the surroundings. For each of the two systems, calculate the rate of entropy production, in
1. Consider the following schematic of a power plant (operating in what is called a 'Rankine Cycle') Turbine Steam generator Condenser Coling water Economiaer The power plant control room reports that the plant is operating continuously at the following peak load conditions: a. Power to pump = 300KW b. Rate of steam flow = 25 kg/s c. Cooling water temperature at condenser inlet = 13 C d. Cooling water temperature at condenser outlet = 34 C Additionally, the following measurements were made at various points in the piping connecting the power plant components Data Pressure Temp. Quality enthalpy Specific Velocity (kJ/kg) point (kPa) volume (m/s) (m3/kg) (C) (x) 1 6200 2 6100 43 5900 177 ---- 4. 5700 493 ----- 5 5500 482 ----- 6 103 0.94 183 7 96 43 -----
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Q2. solve all parts A reversed reversible heat engine extracts heat Q1-22 from a cold reservoir at temperature Tcold = 270K to supply heat to a rigid pressure vessel filled with a system of wet steam of mass m=10kg. The arrangement is depicted in Fig. Q2, where heat supplied by the reversed engine causes the pressure of the system to rise from p₁ = 2 bar at state point 1 to p₂ = 10 bar at state point 2. Subsequently, the reversed engine is reversed, and heat is extracted from the steam to produce work W2-1, which returns the system back to state point 1, i.e., the system undergoes a cycle. Information recorded at the state points depicted in the figure is as follows: State point 1: dryness fraction ✗₁ = 0.1 and pressure p₁ = 2 bar. State point 2: P₂ = 10 bar. 2-1 Assume that the only transfers of heat to take place are those labelled in Fig. Q2, i.e., 02, 0, and Additionally, assume that the role of the rigid pressure vessel is solely limited to containment, so that any changes to its…
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Suppose that you have designed a portable compressed-air supply system, as shown in the figure below,for filling scuba tanks and for driving pneumatics tools in garages and factories.The system consists of an electric motor, an air compressor, an air tank, a regulator and a pressure-reliefsafety valve.The regulator contains a pressure sensor connected to a power switch. The motor is switched on whenthe tank pressure drops bellow a fixed value and off at a slightly higher pressure. The pressure-reliefvalve is set to open at a higher pressure than the regulator motor off-pressure.Explosion of the tank is clearly a dangerous hazard. Three events are assumed to possibly lead to a tankexplosion:1. an internal tank defect such as poor welding2. an external cause such as a plant vehicle colliding with the tank3. Excess pressure in the tank. The excess pressure can occur only if both the control unit and thepressure-relief valve fail:The pressure sensor might fail to shut oof the motor because…
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You are replacing an HVAC system in your building. The system is a hot water system that consists of a boiler that feeds several air-handling units. The total heating load for the building is 2649 thousand Btuh. The max pressure required to pump through the furthest air-handling unit is 69 ft in total head. The inlet temperature at the air-handler is 196 F and the inlet-outlet temperature difference is 30 F. What is the required total flow rate (gpm)?
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