A7.5L pressure cooker has an operating pressure of 175 kPa. The cooker has a pressure relief valve set to release saturated vapour and maintain the pressure once the pressure inside the cooker reaches its operating pressure. Initially, 45% of the volume is filled with saturated liquid water and the remaining volume by water vapour at the operating pressure. Assume that the surrounding temperature and pressure value is 25 °C and 100 kPa. The cooker is now placed on top of a 750 VW electrical heating unit at that is kept on until the dryness fraction of the vapour is 0.0025. An energy conscious person claims that significant reduction in the irreversibility can be achieved if the same amount of heat is supplied from a heat source at 180 °C (e.g. by using a gas hob) instead of the electrical heating unit. Use properties of water as used in the corresponding feedback solution on e-example videos. The loss of Carnot Work Potential (T O'S loss) in kJ due to irreversibility for the electrical heating unit is: Enter your answer as an integer in the box below.

A7.5L pressure cooker has an operating pressure of 175 kPa. The cooker has a pressure relief valve set to release saturated vapour and maintain the pressure once the pressure inside the cooker reaches its operating pressure. Initially, 45% of the volume is filled with saturated liquid water and the remaining volume by water vapour at the operating pressure. Assume that the surrounding temperature and pressure value is 25 °C and 100 kPa. The cooker is now placed on top of a 750 VW electrical heating unit at that is kept on until the dryness fraction of the vapour is 0.0025. An energy conscious person claims that significant reduction in the irreversibility can be achieved if the same amount of heat is supplied from a heat source at 180 °C (e.g. by using a gas hob) instead of the electrical heating unit. Use properties of water as used in the corresponding feedback solution on e-example videos. The loss of Carnot Work Potential (T O'S loss) in kJ due to irreversibility for the electrical heating unit is: Enter your answer as an integer in the box below.

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

Related questions

Q: A 3.6 liter hot pot filled with steam at 300 pKa empties through the pour spout of the pot while…

Q: A7.5L pressure cooker has an operating pressure of 175 kPa. The cooker has a pressure relief valve…

Q: Refrigerant-134a is throttled from the saturated liquid state at 800 kPa to a temperature of -20°C.…

A: Given data: Pi=800 kPaTi=-20°C Need to determine the pressure and quality of the refrigerant at the…

Q: A 200 liter tank initially contains water at 1000 kPa and 1% quality. There is a heat transfer to…

A: Given that: V = volume of the tank = 200 liters P1 = initial pressure = 1000 kPa x1 = initial…

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

Q: A motorist equips his automobile tires with a relief-type valve so that the pressure inside the tire…

Q: SHOW COMPLETE SOLUTION PLS NOTE: THE ANSWER IS SHOWN IN THE PICTURE

Q: A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200…

A: vapor pressure = 200kPa loss pf heat = 10kJ PRESSURE RISES TO = 300KPA

Q: /

Q: Please indicate the given. Determine the optimal intermediate pressures and work needed per kilogram…

Q: In a rigid tank with a volume of 0.5 m3, initially there is an excellent gas at 100 kPa pressure and…

Q: Two tanks are connected by a valve. Tank 1 has a volume of 40 ft^3 and contains propane at 15 psia…

A: Given:The volume of gas in tank 1, The pressure in tank 1, The value of The volume of gas in tank 2,…

Q: Refrigerant-134a is throttled from the saturated liquid state at 800 kPa to a temperature of -20°C.…

A: Given Pressure, P1 = 800 kPa Temperature, T1 = - 20oC Find Final pressure, P2 Final…

Q: A Car with a relief valve-equipped tires start its travel near equatorial sea level at 301.325 kPaa…

A: Given, Absolute pressure before drive = P1 = 301.325 kPa Temperature before drive = T1 = 23.3 oC =…

Q: Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition.…

A: Giveninsulated tankm=4kgP1=600kPaT1=300KR=0.287 kJ/kgKCv=0.7180 kJ/kgK∆U=mCvT2-T1

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

Q: A MOTORIST EQUIPS HIS AUTOMOBILE TIRES WITH A RELIEF-TYPE VALVE SO THAT THE PRESSURE INSIDE THE TIRE…

Q: The A and B tanks given in the figure are separated from each other by the closed valve between…

A: In tank A: Volume of water vapour, V1=0.2m3 Temperature of water vapour, T1=150oC Pressure of water…

Q: Refrigerant 134A has a temperature of 48°C as it enters a valve as a saturated liquid. When leaving…

Q: PROBLEM 1 A 10 m³ rigid tank contains R-134a at 200 kPa and 20°C. Heat is added to the tank until…

A: The isochoric process is a thermodynamic process that takes place at a constant volume. It's also…

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

Q: Identify the state of the fluid: R134a at 400kPa, with a specific volume of 0.0223m3/kg

Q: A rigid container contains m = 3 kg of air. The air changes from an initial state of P1 = 0.5 MPa…

Q: A 2 m3 tank initially contains air at 100 kPa and 25 ∘C. The tank is connected to a supply line at…

Q: The gage pressure of an ideal gas changes from 100 kPa to 200 kPa while maintaining a constant…

A: GIVEN DATA INTIAL GAUGE PRESSURE = 100KPa INTIAL VOLUME = 100L FINAL GAUGE PRESSURE =200KPa WE HAVE…

Q: A2 m tank initially contains air at 100 kPa and 25 °C. The tank is connected to a supply line at 600…

Q: Determine the work done by a 1 Kgm fluid system as it expand slowly in a closed system from P₁= 2.84…

Q: Saturated steam at an absolute pressure of 5 bar is used to heat a stream of dry air. Air enters a…

A: Heat exchangers are used to transfer heat from one medium to another. They can be of direct contact…

Q: Air undergoes a process where T₁= 200 °K and T₂ = 1200 ºk. Determine the change in specific enthalpy…

A: Given data, Air is working fluid T1 = 200 K T2 = 1200 K Find change in specific enthalpy = h2 - h1

Q: Q3/A piston-cylinder contains air at 150Kpa and 400 C after cool air to temperature of 20 C.…

Q: In the compressed liquid region, the specific enthalpy is estimated by h = uf+ Pvf, where uf and vf…

A: State that the given statement is true and false.

Q: The A and B tanks given in the figure are separated from each other by the closed valve between…

A: Given water vapor in tank A VA=0.2 m3 Temperature TA=150∘C Pressure PA=100 kPa water vapor in tank…

Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

A7.5L pressure cooker has an operating pressure of 175 kPa. The cooker has a pressure relief valve set to release saturated vapour and maintain the pressure once the pressure
inside the cooker reaches its operating pressure. Initially, 45% of the volume is filled with saturated liquid water and the remaining volume by water vapour at the operating
pressure. Assume that the surrounding temperature and pressure value is 25 °C and 100 kPa. The cooker is now placed on top of a 750 W electrical heating unit at that is kept on
until the dryness fraction of the vapour is 0.0025. An energy conscious person claims that significant reduction in the irreversibility can be achieved if the same amount of heat is
supplied from a heat source at 180 °C (e.g. by using a gas hob) instead of the electrical heating unit.
Use properties of water as used in the corresponding feedback solution on e-example videos.
The loss of Carnot Work Potential (T_O'S loss) in kJ due to irreversibility for the electrical heating unit is:
Enter your answer as an integer in the box below.
Type your answer..

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step by step

Solved in 5 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A frictionless piston-cylinder device initially contains 80 L of liquid saturated with refrigerant 134a. The piston has free movement, and its mass is such that it maintains a pressure of 500 kPa on the refrigerant. The refrigerant is then heated until its temperature rises to 70 ° C. Calculate the work done during this process.
Wrong answer will get downvote
A cylinder-piston device provided with stops, so that the water supports the weight of the piston, and the force of the atmosphere,It contains water, initially at 300 kPa and 0.5 m3 / kg. The water is heated to a saturated steam condition and the plunger rests on the stops. With the plunger on the stops, the water is heated up to the pressure of 600 kPa. In the P-V and T-V diagrams, with respect to the saturation lines, the process curves go through the initial and final states of the water. On both T-V and P-V diagrams draw the isotherms that pass through both states, and show their values in ° C, in the isotherms. (see img 1)
A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200 kPa. At this time, a linear spring (K = 150 N/m) is touching the piston, but exerts no force upon it. Heat is now transferred to the water vapor for 30 minutes through a resistive heater having a current of 10 amperes. The pressure and volume rise to 300 kPa and 0.6 m^3 while the system lost 10 kJ of heat during this process. Determine the voltage of the resistive heater and draw the provess on a P-v diagram with respect to saturation lines. Show detailed calculations and specify any required values found on thermodynamic tables.
The case of a piston-cylinder device provided with stops is presented. Initially, the water supports the weight of the piston, and the force of the atmosphere is 300 kPa and 0.4 m3/kg. The water is heated until it reaches a saturated steam condition and the plunger rests on the stops. With the piston on the stops, the water is heated to a pressure of 700 kPa. Plot the curves of the processes on the p-V and T-V diagrams indicating the initial and final states of the guide. On both the p-V and T-V diagrams plot the isotherms passing through both states, and show their values in °C.
A motorist equips her automobile tires with a relief type valve so that the pressure inside the tire never will exceed 242 kPa (gage). She starts a trip with a pressure of 200 kPa (gage) and a temperature of 23°C in the tires. During the long drive the temperature of the air in the tires reaches 80°C. Each tire initially contains 0.11 kg of air. Assuming that the tires are inflexible, determine (a) the masses of air escaping each tire; (b) the pressure inside the tire when the temperature returns to 23°C.
1. A scuba tank contains 1.5 kg of air. The air in the tank is initially at 15°C. The tank is left near an engine exhaust line. and the tank's pressure doubles. Determine (a) the final temperature; (b) the change in internal energy; (c) the heat added. (d) AS
A motorist equips his automobile tires with a relief-type valve so that the pressure inside the tire never will exceed 240 kPa(gage). He starts a trip with a pressure of 200 kPa(gage) and a temperature of 23 degree Celcius in the tires. During the long drive, the temperature of the air in the tires reaches 83 degree Celcius. Each tire contains 0.11 kg of air. Determine (a) the mass of air escaping each tire, (b) the pressure of the tire when the temperature returns to 23 degree Celcius. Please indicate all the conversion.
Air is compressed into a 0.5 ft3 rigid tank until the initial pressure is 650 psia when the temperature raises from 70 0F. If the air is allowed to cool to 30 0F, what will be the final pressure of the air