mechanical engineering, If a reversed Carnot cycle operates between the temperature limits of 27°C and -3°C, then what is the ratio of the COP of a refrigerator to that of a heat pump?
Q: a) Explain how Fourier's law of conduction (in one-dimensional cartesian system) can be applied to…
A: (a) The Fourier's law of conduction states that heat flux vector is proportional to the negative…
Q: (A): Derive the system of differential equations describing the straight-line vertical motion of the…
A: In This question given data is K1=1 , K2=1, K2=1 also m1=1 m2=1 also the Initial Conditions are…
Q: The coal combustion in the furnace of steam power plant produces 31.52 mega-Watts (MW) of heating…
A:
Q: A two-jet Pelton wheel is required to produce 2MW power with 400rpm. The diameter of the wheel is…
A: As per expert guidelines we are supposed to solve only the first three subparts of the question.…
Q: The Free-Body diagram for joint A is drawn assuming that all internal forces are in tension (even if…
A:
Q: Mark true false 1.Changing the expansion device from a turbine to a throttle increases the COP
A:
Q: A Scotch yoke is a mechanism that transforms the circular motion of a crank into the reciprocating…
A: Given-Information:- Acceleration of point A, a =-1.8 sin(kt) m.s2Angular velocity of the system, k…
Q: Q6- Air flows isentropically through converging-diverging nozzle. At a section where nozzle area is…
A: Given : Flow conditions at a certain point Required: Mach number at throat, mass flow rate and…
Q: Problem #2: A steel bolt with a diameter of 8 mm fits through an aluminum sleeve with and outer…
A: In this issue, we will compute the axial stress in the steel bolt and the axial stress in the…
Q: Solution in question 4 and 5.
A: we have to use data from the solved problem (3)combined heat rate S=total heat input total power…
Q: A long copper tube (O.D.=0.5 m and I.D.=0.45 m) is centered in a concrete block (square…
A:
Q: Define a Newtonian Fluid, and with the aid of a sketch, explain the no-slip boundary condition and…
A: The different phenomenon are explained below with proper diagrams.
Q: A steel cantilever beam, of length L=1 m, has a hollow rectangular cross-section, see Figure Q3. The…
A:
Q: A drainage pump has a tapered suction pipe. The pipe is running full of water. The pipe diameters at…
A: Given-Information:- Diameter at inlet,Di =1 mDiameter at outlet, D2 =0.5 mElevation, z2 = 2 m + 3 m…
Q: The flywheel in Figure Q18 consists of two plates of mass m = 64 kg and thickness w = 0.050 m which…
A: The mass of the plate is m=64 kg The thickness of the plate is w=0.050 m The arm length is L=0.48 m…
Q: The assembly shown below consists of a steel (Es = 200 GPa and As tube AB and a brass (EB = 100 GPa…
A: In this problem, we will compute the normal stress in each tube as well as the deflection at rigid…
Q: 3. Determine the force in each member of the loaded truss. Indicate if it is tension or compression.…
A: Given: F = 3090 N Required: Forces in all members
Q: A gas cylinder with interior volume 11.6 L holds compressed air at 17.4 MPa. The cylinder is joined…
A: Given: Volume of the gas cylinder: →V1=11.6 L=0.0116 m3 Pressure in the gas cylinder: →P1=17.4 MPa…
Q: The sprinter begins from rest at position A and accelerates along the track. If the stationary…
A: Given: Sprinter begins from A to O = 42 m distance from sprinter to O parallel to the track = 19 m…
Q: 11.19 Based on experimental observations, the acceleration of a particle is defined by the relation…
A: (a) To find: The velocity of the particle at x=-1 m. Given: The acceleration of the particle is…
Q: Sedwork 2F 3.5kN 6.5kN ope Determine a) Tmax b) Jemax 10.5m 0.5m 3kN 10.5m 115mm IT 7mm
A:
Q: 1-1. An L-shaped body is loaded with a concentrated load and a uniformly distributed load as…
A:
Q: A vapor at a flow rate of 3 kg/s enters a group of eight (8) nozzles at 1.5 MPa, 240 oC and a…
A:
Q: In an ideal vapor compression cycle operating between 1.2 bar and 8 bar using R-410A as the…
A:
Q: Consider the ideal vapor compression cycle operating between 1.4 bar and 9bar using R-125 as the…
A:
Q: Solve asap pls in 2 min 18 pich Gear, Pinion has 12 teeth, Gear has 56 tieth P=(N)/(D)
A: Given Pitch, P = 18 mm Pinion teeth, t = 12 Gear teeth, T = 56 Find Gear ratio, G
Q: Q3) A mass of 2 kg is attached to the end of a light cord to a pendulum of length L. The mass is…
A: Given-Information:- Mass, m = 2kgAngle, θ = 53°Speed, vf = 6.3 m/s To-Determine:- Length of…
Q: What are the advantages of using cascade refrigeration? I.Higher required pressure differences for…
A: This question is based on the concept of Cascade Refrigeration system.
Q: Derive the differential equation governing the buckling of the column shown in figure
A:
Q: Draw the axial force and shear force and bending moment digram of frame
A: Given: The uniformly distributed load: →w=2k/ft From the symmetry, the vertical reaction at point a…
Q: A particle which moves with curvilinear motion has coordinates in millimeters which vary with the…
A: Given data x = 1.8t2 - 2.1t (m) y = 4.1t2 - t3/2 (m) Find the velocity nd acceleration at t = 3.2 s
Q: 3 m 1 m A 800 N/m 3 m B
A:
Q: A steel plate having a thickness of 100 mm is suddenly exposed to a hot gas at 1000 oC in a furnace.…
A:
Q: 5. Saturated water vapor cools down to a temperature such that the piston rests on the stops and the…
A: Plot the process on pv diagram which show the state points relative to the vapor dome.
Q: Two identical conducting small spheres are placed with their centers 0.200 m apart. One is given a…
A: The forces between two charges is calculated using the Coulomb formula .
Q: Consider the pipe system with EGL and HGL shown in the figure below. Which of the following…
A: In the given figure above: The EGL refers to energy gradient line and HGL refers to hydraulic…
Q: State three precautions against fatigue.
A: Fatigue is defined as a process in which there is plastic deformation in the object due to the…
Q: An ideal Carnot heat pump operates from a low temperature reservoir T₁-287.7 K and supplies 5.46 kW…
A:
Q: The barometric pressure at sea level is 760 mm of mercury while that on a mountain op 35 mm. if the…
A: Given:barometric pressure at sea level, Po=760 mm Hgpressure on mountain top, P=735 mm Hgdensity of…
Q: Draw the shear and moment diagrams for the beam. A -3 m- 1.5 kN/m B
A: Given: The length of the beam, L = 3 m The load intensity, w = 1.5 kN/m
Q: F5-1. Determine the horizontal and vertical components of reaction at the supports. Neglect the…
A:
Q: A simple ideal Rankine Cycle operates between the pressure limits of 6969 kPa and 69 kPa. If the…
A: Given data:- A simple ideal Rankine Cycle high pressure (boiler pressure)= 6969 kPa low…
Q: It is suggested that an incompressible fluid flows with the velocity field v = (sin (xy²zt), x²t,…
A: Given: v=sinxy2zt,x2t,zy2t To find: Determine expressions for flow divergence Explain in a few…
Q: The motion of the 5.00-kg uniform rod AB is guided by small wheels of negligible mass that roll on…
A: Given: Mass of the rod AB→m=5 Kg Length of the rod→L=0.6 m Spring constant→k=430 N/m Initial…
Q: The temperature of points in space given by a scalar field is T(x, y, z) = x² + y² − z a. Find the…
A:
Q: The simple truss supports a cylinder of weight W= 175 lb. Compute the force in each member of the…
A: As angle between AB and CB will be (180-80-40)=600 Diagram at point B will be as shown above,…
Q: Determine the magnitude and direction of the resultant of the concurrent forces described below.…
A:
Q: If roller A moves to the right with a constant velocity of VA = 3 m/s, determine the angular…
A: Given data:- Velocity of vA = 3 m/s Length of AB=1.5 m θ=30°. To find:-the angular velocity of the…
Q: The motion of the 5.00-kg uniform rod AB is guided by small wheels of negligible mass that roll on…
A: Given: The mass of the rod, m = 5 kg The spring constant, k = 430 N/m The initial position of the…
Q: A steel cantilever beam, of length L=1 m, has a hollow rectangular cross-section, see Figure Q3. The…
A:
If a reversed Carnot cycle operates between the temperature limits of 27°C and -3°C, then what is the ratio of the COP of a refrigerator to that of a heat pump?
Step by step
Solved in 2 steps
- An air conditioner is a device used to cool the inside of a home. It is, in essence, a refrigerator in which mechanical work is done and heat removed from the (cooler) inside and rejected to the (warmer) outside. A home air conditioner operating on a reversible Carnot cycle between the inside, absolute temperature T2, and the outside, absolute tempera- ture T1 > T2, consumes P joules/sec from the power lines when operating continuously. (a) In one second, the air conditioner absorbs Q2 joules from the house and rejects Q1 joules outdoors. Develop a formula for the efficiency ratio Q2/P in terms of T1 and T2. (b) Heat leakage into the house follows Newton's law Q = A(T, – T2). Develop a formula for T, in terms of T1, P, and A for continuous operation of the air conditioner under constant outside temperature T and uniform (in space) inside temperature T2. (c) The air conditioner is controlled by the usual on-off thermostat and it is observed that when the thermostat set at 20°C and an…The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL Select the correct statement for this combined the system.__________ A. The system receives heat QL from the sink and transfer 100% of the heat QLto the source without any work input, which violates the Clausius statement. B. The system receives heat QL from the sink and transfer 100% of the heat QLto the source without any work input, which violates the Kelvin-Planck Statement. C. The system receives heat QL from the sink and transfer QH-QL amount of heat to the source, which does not violate the…The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL What is the heat exported to the source by the combined system, QH,sys?__________ A. QL B. QH-QL C. QH D. QH+QL
- The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL What is the net work output by the combined system, Wnet,sys?__________ A. QL B. QH-QL C. QH D. 0The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL What is the heat received from the sink by the combined system, QL,sys?__________ A. QL B. QH C. QH+QL D. QH-QLThe Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL What is the thermal efficiency of the heat engine?__________ A. Wnet/QH=QH/QH=100% B. QL/QH C. QH/QL D. (QH-QL)/QH
- The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the equivalence, a heat-engine-refrigerator combined system is used as shown below. The system satisfies the following conditions, where QH and QL are known values. 1) Heat recieved by the heat engine from the source: QH,HE=QH 2) Heat QH is completely converted into net work output from the heat engine: QH=Wnet 3) Heat recieved by the regrigerator from the sink: QL,R=QL What is the heat exported to the source by the refrigerator, QH,R?__________ A. QH B. QH+QL C. QH-QL D. QLA heat pump operates between two heat reservoirs, one at 800 K and other at 400 K. What will be the coefficient of performance (COP) of the heat pump?A refrigerator has a coefficient of performance equal to 5. If the refrigerator absorbs 120 J of thermal energy from a cold reservoir in each cycle, find (a) the work done in each cycle and (b) the thermal energy expelled to the hot reservoir.
- (1) Explain how a heat engine works. (2) Explain the 2nd Law of thermodynamics.A reversible heat engine operates between two reservoirs: one at Th = 395.0°C and another at Te = 150°C. It goes through a cycle consisting of an adiabatic compression during which it ab- sorbs 125.0 J of heat energy, followed by an isothermal expansion at Th, followed by an adiabatic expansion, followed by an isothermal compression at Te. The output of the engine is used to run a reversible refrigerator operating between the same two reservoirs, that has a cycle consisting of an adiabatic expansion, followed by an isothermal expansion at Te, followed by an adiabatic com- pression, followed by an isothermal compression at Th. The output of the engine is used to run the refrigerator. e) What is the total change in entropy of the universe in running this system?A reversible heat engine operates between two reservoirs: one at Th = 395.0°C and another at Te = 150°C. It goes through a cycle consisting of an adiabatic compression during which it ab- sorbs 125.0J of heat energy, followed by an isothermal expansion at Th, followed by an adiabatic expansion, followed by an isothermal compression at Te. The output of the engine is used to run a reversible refrigerator operating between the same two reservoirs, that has a cycle consisting of an adiabatic expansion, followed by an isothermal expansion at Te, followed by an adiabatic com- pression, followed by an isothermal compression at Th. The output of the engine is used to run the refrigerator. Suppose the ambient temperature is 20.0°C, and the hot reservoir consists of a spherical tank with a radius of 4.00 m, that acts as an ideal emitter of radiation. If all the radiant energy emitted by the tank could be captured, what is the average amount of work that could be done each second?