If the compression ratio of diesel engine is 18.7 and the cut off ratio is 2.3, the thermal efficiency will be Select one
Q: In an ideal Diesel engine compression is from 14.7 psia, 80°F, 1.43 cu ft to 500 psia. Then 16…
A: Given data as per question Initial pressure = 14.7 psia Initial pressure =800 F =299.817 k Initial…
Q: Power Plant whose efficiency is between 20% to 35%. What is the compression ratio based on…
A: Ans: A is correct
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Q: A diesel engine has a bore of 4 in., a stroke of 4.3 in., and a compression ratio of 19:1 running at…
A: Engine cylinder bore, D=4 inEngine cylinder stroke, L=4.3 inCompression ration, r=19:1Engine speed,…
Q: ession process, and a temperature of 750 Kat the end of sion process. The compression ratio of the…
A: GivenP1=50KPaT1=280KT4=750Kr=10Cp=1.005kJ/kgKCv=0.718kJ/kgKR=0.287kJ/kgKk=γ=1.4
Q: An engine working on Diesel cycle has a compression ratio of 15 and fuel supply is cut off at 8% of…
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Q: In an ideal Diesel engine compression is from 14.7 psia. 80°F. 1.43 ft Then 16 BTU/cycle are added…
A: Given Compression pressure = 14.7 Psia Initial temperature = 80 F = 540 R Initial volume = 1.43 ft3…
Q: Diesel engine takes in atmospheric air at 101.325 kPa and 29°C. The initial volume of the air is 0.6…
A: Answer: (a) Power: 8080.6 kW (b) Efficiency: 61.2 %
Q: Give example of a problem solved using reheat rankine cycle method and compare to rankine cycle…
A: The calculation process is given below:
Q: Diesel cycle using air with compression ratio of 15:1, and cut off ratio of 2:1. The pressure and…
A: Given data: - The compression ratio is r = 15. The cut-off ratio is ρ = 2. The pressure at the…
Q: A Diesel engine has a compression ratio of 14 and cut-off takes place at 6% of the stroke. Find the…
A: We know that a diesel engine has a compression ratio of 14 and that cutoff occurs at 6% of the…
Q: 1) In a constant pressure engine the compressi ratio is € and at the start of the polytropic…
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Q: Brayton Cycle: 18. An air standard Brayton cycle operates with compression ratio of 6 and…
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Q: In a constant pressure engine, the compression ratio is € and at the beginning of the polytropic…
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Q: no. 3 question: A diesel engine powers a boat. The engine’s cylinders each have a compression ratio…
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Q: 10.74 A diesel engine has a state before compression of 95 kPa, 290 K, a peak pressure of 6000 kPa,…
A: Given data: T 1 = 290 K P1 = 95 kpa T 3 = 2400 K P 3 = 6000 kpa
Q: A spark – ignition engine has a compression ratio of 8.5 and a maximum temperature of 945.15K. At…
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Q: It is desired to increase the compression ratio of spark ignition engine for 8 to 10. Assuming a…
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Q: 2. In an ideal Diesel engine compression is from 14.7 psia, 80°F, 1.43 ft3 to 500 psia. Then 16…
A: Given Data' For the given diesel cycle: P1=14.7 psia P2=P3=500 psia V1=1.43 ft3 T1=80°F Now the…
Q: An engine speed ratio working with the ideal Brayton's frame is 10. Air passes through the engine…
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Q: diesel engine has a compression ratio of 15 and heat addition at constant pressure takes place at 6%…
A: Given:r=15cut-off takes place at 6% of stroke
Q: The compression ratio of an engine working on the constant volume cycle is 9.3. At tho ic 31°C and…
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Q: diesel fuel power plant is 13% more of the ied to the system which is equal to 142 jo
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Q: An air standard gas turbine engine operates on an overall pressure ratio of 4 and between the…
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Q: An air-powered Otto cycle has a compression ratio of 8. Since the lowest and highest temperatures of…
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Q: Question Find the air-standard efficiency and expansion ratio of a Diesel engine if the clearance…
A: In diesel cycle, heat is added at constant volume, while heat is rejected at constant volume.…
Q: Find the percentage increase in the efficiency of a Diesel cycle havin compression ratio of 16 and…
A: Diesel Cycle
Q: In a gasoline engine with a compression ratio of 9, the compression process At the beginning, the…
A: Given data for otto cycle Compression ratio (r) = 9 P1 = 100 kPa T1 = 300 K Qs = 1310 kJ/kg…
Q: n Automotive Engineering company has a task to setup a odel. The engine has four-cylinder,…
A: Four-cylinder, Four-stroke Displacement Volume, Vs = 3 Litres =3 × 10-3 m3 Compression Ratio, r = 17…
Q: in an ideal diesel engine compression is from 14.7 psia, 80 degree Celsius , 1.43 ft^3 t 500 psia.…
A: Draw the P-V diagram of the diesel cycle.
Q: An oil engine operating on a dual cycle the pressures in the cy linder at the end of the compression…
A: A dual cycle is a cycle in which half of the heat addition takes place at constant volume and half…
Q: n engine operates on the air-standard Otto Cycle. The net cycle work of air is 1000 kJ/kg with…
A: Given Data: The net cycle work of air is, Wnet=1000 kJ/kg. The maximum temperature of air in the…
Q: A diesel cycle has an initial temperature of 270C. If cut off ratio is 2.5 and a compression ratio…
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Q: A four stroke engine has a compression ratio of 10.2 to 1, a displacement volume of 2.6 liters and…
A: According to the problem, the compression ratio is 10.2:1. r=10.2 Here, r is the compression ratio.
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Q: A thermal power has a net power 10 MW. The backwork ratio of the plant is 0.005. Determine the…
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Q: In an ideal Diesel engine compression is form from 14.7 psia, 80 degrees farenheit. 1.43 cu ft to…
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Q: Q6/ In Diesel engine the air at the beginning the compression stroke the pressure and temperature…
A: Solution: P1=100kPa T1=40°C Using ideal gas equation, P1v1=RT100×103v1=287×313v1=0.89831m3/kg From…
Q: vice? Take the working fluid to be superheate a specific heat ratio of 1.33, and give your an
A: Given data compression ration = 24.9 Rate of heat addition = 590 kW gama = 1.33 work output =?
Q: A diesel engine in a power plant with efficiency of 36% is running at 850 rpm and developed a torque…
A: Calorific value of diesel fuel,CV=44.3MJ/kgTorque developed by…
Q: Find the efficiency of Ideal Brayton cycle having pressure ratio of 8. What will be new efficiency…
A: Given data pressure ratio(rp) = 8 pressure ratio(rp)=10
Q: A Diesel engine has a compression ratio of 20 and cut-off takes place at 5% of the stroke. Find the…
A: Data given - For a diesel engine Compression ratio = 20 Cut off takes place at = 0.05 of stoke y…
Q: A diesel cycle has an initial temperature of 27oC. If cut-off ratio is 2.5 and a compression ratio…
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Q: a.) An Otto cycle has a heat added of 1000 Btu and work output of 550 Btu. Find the compression…
A: Efficiency of Otto cycle, η= 1- 1rγ- 1η= WQinη= 1- QrejQin Compression ratio, r= V1V2, where V1=…
Q: Air standard Otto cycle have 10 compression ratio, if specific heat at constant volume ( CV)…
A: An Otto cycle is a simplified thermodynamic cycle that describes how a spark-ignition piston…
Q: A petrol engine is having, stroke length of 200 mm and clerance length (clerance gap) of 20 mm. Then…
A: Given data: stroke length (Ls) = 200 mm Clearance length (LC) = 20 mm Need to determine the…
Q: A diesel engine has a compression ratio of 15 and heat addition at constant pressure . And the air…
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Q: In an ideal Diesel engine compression is from 14.7 psia, 80°F, 1.43 cu ft to 500 psia. Then 16…
A:
Q: 3. In an ideal Diesel engine compression is from 14.7 psia, 80°F, 1.43 cu ft to 500 psia. Then 16…
A: given; →initial pressure(P1)=14.7psia→initial temperature(T1)=800F…
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- An R-404A system is operating with a -50F evaporator and the condenser is operating at 115F. What is the compression ratio of this system? A. 16.9 to 1 B. 17.8 to 1 C. 19.1 to 1 D. 21.33 to 1A typical temperature relationship between a high-efficiency condenser and the ambient temperature is A. 10F. B. 20F. C. 30F. D. 40F.Four methods for controlling head pressure in an air-cooled condenser are ______, ______, _______, and
- Define flash gas, and explain how it applies to the net refrigeration effect of the refrigeration cycle.Why is two-stage compression popular for extra-low-temperature refrigeration systems?Cold storage uses R134a, the evaporator temperature is -7C and the condenser temperature is 32C. The cooling load is 5.3103 kJ/min. The cycle is ideal. Determine: 1. Mass flowrate of the refrigerant. 2. Coefficient of Performance (COP). - If the water condenser is used that enter at 24C and exit at 30C. determine the water flowrate.
- In a refrigerant 11 system, one evaporator is to provide 256 kw of refrigerant at 0°C and another evaporator is to provide 228 kw at -20°C. The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 40°C. h2 = 393 kJ/kg, h4 = 412 kJ/kg Compute the ff:a. mass flow rate at low stage compressor (m1), answer must be in kg/sb. mass flow rate at high stage compressor (m3), answer must be in kg/sc. low stage compressor work, answer must be in kwA Freon 12 simple saturation cycle operates at temperatures of 35°C and 15°C for the condenser and evaporator respectively. (a) Determine the COP and HP/TR of the system. If a liquid-vapor heat exchanger is installed in the system, with the temperature of the vapor leaving the heat exchanger at 15°C, (b) what will be the change in the COP and HP/TR?Considering a Rankine cycle: Why is it important to condense at leastuntil liquid saturated the fluid in the condenser?
- 1. Discuss the effect of decreasing the condenser pressure, increasing the boiler pressure and increasing the maximum temperature in the basic Rankine cycle on the overall thermal efficiency, while showing the different variations in the T-S diagram (Hint: show how the Wnetwill be affected)In a Refrigerant 11 system ,one evaporator is to provide 210 kw of refrigerant at 0 0C and another evaporator is to provide 224 kw at -200C . The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 400C . Given that, h2=389kJ/kg, h4=416kJ/kg Compute the following: a.) mass flow rate at low stage compressor (m1)ANSWER: 1.25377 kg/s b.) mass flow rate at high stage compressor (m3)ANSWER: 2.90255 kg/s c.) low stage compressor workANSWER: 12.96406 kw d.) high stage compressor workANSWER: 78.68819 kw e.) total compressor workANSWER: 91.65226 kw f.) COPANSWER: 4.73528 g.) heat rejected in the condenserANSWER: 525.65226 kwRefrigerant vapor enters into the compressor of a standard vapor compression cycle at - 10°C (h = 402 kJ/kg) and leaves the compressor at 50°C (h = 432 kJ/kg). It leaves the condenser at 30°C (h = 237 kJ/kg). Calculate the COP of the cycle.