Calculate the work done (W) when heat (Q) supplied to a system is by means of hot water from an engine with temperature difference of 48+24 °C and 1.5 kg and change in internal energies ΔU (U2 – U1) is 55 Joules. Note: cp for water is 4100 Joules per kilogram-kelvin.
Q: In a hydroelectric station, water is available at the rate of 175 m³/s under a head of 18 m. If the…
A: Data given- Q = 175 m3/s H = 18 m N = 150 RPM Overalll efficiency = 82%
Q: Helium enters a continuous flow compressor at 336 K and leaves at 451 K. If the mass flow rate is…
A: Given that, Entering temperature of helium, Ti=336 K,Exit temperature of helium, To=451 K,Mass flow…
Q: The outer surface of a transistor is cooled convectively by a fan-induced flow of air at a…
A: given data Transistor's outer surface area Ao=5x10-4m2 elrctric power p = 3 WConvective heat…
Q: B) Calculate the work done (W) when heat (Q) supplied to a system is by means of hot water from an…
A:
Q: 17 In an irreversible process there is a loss of heat. no loss of work MED a b gain of heat No gain…
A: (Q 1) It is required to state the condition that are applicable for irreversible process. (Q 2) It…
Q: During the operation of a thermal machine, a reduction in the entropy of the working substance is…
A:
Q: i) An electric motor draws a current of 8 A from a 110 V source. The output shaft develops a…
A: Part a) Write down the expression of power input given to the motor.
Q: A refrigerating machine is driven by a motor of output power 2.25 kW and 2.5 tons of ice at -7°C…
A: Specific heat is defined as heat added or rejected from a body by virtue of temperature difference…
Q: What will be the work done on a body when it is moved horizontally for a distance of 4m by a…
A: Given data: The magnitude of the force applied on the block, F = 5 kN. Distance travelled by the…
Q: There are compressed 1122 lb/hr of oxygen by a 13.92" x 14", double acting, motor driven compressor…
A: Given dataP1=14.7 Psi=101.35kPaT1=106F=314.26KP2=45 Psi=310.264 kPaN=100 rpmm˙=1122 lb/hr=0.1539694…
Q: A creamy must cool 20,000 liters of milk received each day from initial temperature of 32℃ to a…
A: GivenV=20000 ltr=20 m3T1=32oCT2=1oCloss =12% cooling loadCp=3.9 kJ/kgKS.G=1.05
Q: Consider the device shown below operating at steady-state using steam as the fluid. For every kg of…
A: Given data Work done = W = 500 kJ/kgConditions at inlet are :T1 = 400°CP1 = 3 MPav1 = 160…
Q: the laboratory at 2000 rpm, when it was found that the brake torque w with all cylinders firing but…
A:
Q: located at an elevation 200 m below that of the surface of the water intake. The friction loss in…
A:
Q: 7.44.) A pump operates adiabatically with liquid water entering at T1 and P1 with a mass flow rate…
A: Given Data : The operating conditions are as below Mass flow rate m = 20 kg/s Efficiency η = 0.75…
Q: A single-stage, single-acting air compressor works between 01 bar and 16 bar by the compression law…
A: Given that, p1=1 bar, p2=16 bar,n=1.3, N=350 r.p.mPiston speed=200 m/minpind=30 kWηvol=0.85 To Find:…
Q: A system consisting of a gas contained in a cylinder with a frictionless piston is taken around the…
A:
Q: A pump at 65% efficiency is used to transport water from a large open reservoir to a point 10m above…
A:
Q: 4.1) There is a Carnot thermal engine that has a cold focus at 255K and an efficiency of 40%. If the…
A:
Q: Define the following 1. Application of thermodynamics in Mechanical Engineering. 2. Air-Fuel ratio.…
A: Disclaimer: Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: Calculate the work done (W) when heat supplied to a system is by means of hot water from an engine…
A:
Q: PROBLEM #1: Complete the data of the table below. Copy the entire table in your paper and use a…
A: According to guidelines first question will be done from multiple questions.
Q: Please help with question 2 only.
A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…
Q: energy QH by heat transfer from a hot reservoir at TH = 1500°R and rejects energy Q by heat transfer…
A: This question belongs to Thermodynamics, Thermodynamics second law.
Q: Develop the general energy balance applied to closed systems
A: The general energy balance for a closed system can be developed by using the conservation of energy.…
Q: Show that the thermal efficiency of any internal combustion engine can be simplified as a ratio of…
A:
Q: A small petrol engine produces 15 KW of power under the following conditions; Fuel intake 0.05…
A:
Q: Calculate the work done (W) when heat supplied to a system is by means of hot water from an engine…
A:
Q: Carnot engine operating between 775 0K and 305 0K produces 54 kJ of work. Determine (a) QA, (b) S…
A: Given Data Th = 775 K Tl= 305 K W= 54 kJ
Q: If a closed system undergoes a process for which S2=S1, the process must be internally reversible. -…
A: As per our guidelines we are supposed to solve only one question if multiple questions are asked.…
Q: 2. The goal of this problem is to select a power plant and battery for an electrically powered light…
A: According to our guidelines I can solve only 3 subparts at a time, kindly repost your question and…
Q: Helium expands polytropically through a gas turbine according to the process PV^1.327=C. If the…
A: For solution refer below images.
Q: There are developed 10hp by a carnot engine between 1000F and 100F. Determine a. The thermal…
A:
Q: Four pounds of air gain 0.491 BTU/R of entropy during a nonflow isothermal process. If P1=120 psia…
A:
Q: QUESTION 7 What is the entropy change for an energy reservoir at 700°C that transfers 1500KJ of heat…
A:
Q: 4. Air flows steadily at the rate of 0.4 kg/s through an air compressor, entering at 6 m/s with a…
A: Given: The mass flow rate of air, m = 0.4 kg/s The air velocity at compressor entry, V1 = 6 m/s The…
Q: Two Carnot engines work in series between source and sink temperature of 04 1200K and 300K. Find out…
A: Given: T1=1200 KT2=300 K
Q: The following table lists temperatures and specific volumes of water vapor at two pressures: Data…
A: Step.1 given Data P = 1.0 Mpa P=1.5 Mpa T (°c)…
Q: Consider the case of a non isolated system that is one that does interact with its surroundings,…
A: According to the 1st law of thermodynamics, the net heat added to the body is equal to the net work…
Q: Two Carnot heat engines run in series with the efficiency of first engine is k times the second. If…
A:
Q: Steam enters a turbine stage with an enthalpy of 3628 kJ/kg at 70 m/s and leaves the same stage with…
A: For solution refer below images.
Q: A four-stage compressor works between limits of 1 bar and 120 bar. The index of compression in each…
A:
Q: certain coal fire power plant has a heat rate of 2.88 x 108 calories per kW-hr. Coal cost Php 2,500…
A: 1 btu = 0.000293071 kWh = 0.252164 kcal = 252.164 cal 13000 btu = 3.8099239 kWh = 3278.1372 kcal =…
Q: Warm air is contained in a piston-cylinder assembly oriented horizontally. The air cools slowly from…
A:
Q: Q1/A Steam turbine run with steam inters (30 bar 400°C to 4 bar) and then expanded isentropically.…
A: Given Data State 1: 30 bar,400°C State 2: 4 bar
Q: K=519 Steam enters a turbine with a pressure of P1 = (5000 – K) kPa, specific internal energy u1 =…
A: Given: The value of K = 519 At inlet of turbine, The pressure, P1 = (5000-k) kpa = 5000 - 519 =…
Q: The velocity of wind at a wind turbine is measured to be 6 m/s. The blade span diameter is 24 m and…
A: given velocity of wind V=6m/sblade diameter d=24mturbine efficiency η=29%density of air ρ=1.22kg/m3
Step by step
Solved in 2 steps with 2 images
- A steam turbine seems to operate at a mass flow rate of 1.5 kg / hr. Turbine inlet state P1 = 2 MPa, T1 = 400C and V1 = 60 m / s; the output state is P2 = 0.1 MPa, x2 = 0.97 and V2 = 150 m / s. Difference in height between turbine outlet 1 m. The heat loss from the turbine is given as 50 kW. a) Determine the production power from the turbine. b) Turbine power neglecting Kinetic and Potential energy changes calculation. Interpret these two results. c) Turbine spring and cross section areas, as well as steam pipe diameters calculation. d) If the ambient temperature is 27C, what is the entropy generation in the turbine?A power plant with a nominal rating of 1kW does not actually produce 1kW continuously because its capacity factor C - the fraction of the time that it is actually running at its rated power - is less than 100%. If the capacity factor C = 35%, how much energy will be generated by this power plant over 1 year in MJ?A diesel power plant has an overall efficiency of 30%. If the calorific value of diesel is 18000 BTU/lb and cost P6.000 per liter, how much is the fuel cost of production per KWHR of energy? Take the density of diesel as 900 grams per liter. A. P1.91/KWHR B. P1.85/KWHR C. P2.12/KWHR D. P2.45/KWHR
- Use the following conversions where necessary:1hp = 745.7W; ρwater = 1000 kg/m3; ρmercury = 13600 kg/m3; 1 atm = 101.325 kPa; Cp (water) = 4.18 kJ/kg °C; g = 9.81m/s2; v. For properties of air, use R = 0.287 kJ/kg K; Cv (air) = 0.718 kJ/kg K; Cp (air) =1.005 kJ/kg K 3. i) An electric motor draws a current of 8 A from a 110 V source. The output shaft develops a constant torque of 9.4 Nm at a rotational speed of 800 rpm. Determine a. The net power input to the motor in kW b. The amount of energy transferred out of the motor by the shaft in kWh during 1.5 hp operationBy removing energy by heat transfer from a room, a window air conditioner maintains the room at 20°C on a day when the outside temperature is 28°C.(a) Determine, in kW per kW of cooling, the minimum theoretical power required by the air conditioner.(b) To achieve required rates of heat transfer with practical sized units, air conditioners typically receive energy by heat transfer at a temperature below that of the room being cooled and discharge energy by heat transfer at a temperature above that of the surroundings. Consider the effect of this by determining the minimum theoretical power, in kW per kW of cooling, required when TC = 16°C and TH = 32°C, and determine the ratio of the power for part (b) to the power for part (a).Maximum possible thermal efficiency of heat engine operating between temperature (A) T1 = 80 C and T2 = 40 C (B) T1 = 80 C and T2 = 30 C (C) T1 = 80 C and T2 = 20 C What you can conclude from above results?
- B) Calculate the work done (W) when heat supplied to a system is by means of hot water from an engine with temperature difference of 48+15 °C and 1.5 kg and change in internal energies ΔU (U2 – U1) is 55 Joules. Note: cp for water is 4100 Joules per kilogram-kelvin.Develop the general energy balance applied to closed systemsAn automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. (a) How much heat input is required, and (b) How much heat is discharged as waste heat from this engine, per second?
- The maximum thermal efficiency possible for a power cycle operating between 1096°F and 267°F is _____. Express in four significant figures, not in percentage.In your own words, define efficiency as it applies to a device designed to perform an energy transformation.A 30-kW motor drives a fan and delivers air through a duct 1.0 m x 1.0 m at 11.684 cm WG static pressure and 2.159 cm WG velocity pressure. The density of air is 1.20 kg/m³ and the density of water is 1000 kg/m³. Determine: 2. The capacity of fan, m3/s 3. Fan efficiency, %