![Problem B: Diesel Cyele The Diesel cycle represents the ideal cycle for Compression-Ignition engines. The ideal Diesel cycle is described by the four-step cycle (process): 1-2: Isentropic Compression from Bottom-Dead-Center (BDC) to Top-Dead-Center (TDC), 2-3: Constant pressure heat addition (n) to 3-+4: Isentropic Expansion from vy to V 4+1: Constant volume heat rejection (Qout) at TDC (). (a) Sketch the P vs. v diagram for the Diesel cycle (label all key parameters and processes). [7 pts] (b) Sketch the T vs. s diagram for the Diesel cycle (label all key parameters and processes). [7 pts)] (e) Derive the thermal efficiency of the Diesel cycle in terms of k, T, T2, T3, and T4? [11 pts]](http://img.homeworklib.com/questions/46730920-0c58-11ec-812a-b98ec29d0ce8.png?x-oss-process=image/resize,w_560)
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Problem B: Diesel Cyele The Diesel cycle represents the ideal cycle for Compression-Ignition engines. The ideal...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much sooner than in early diesel engines. That means, heat is added partly at constant volume and partly at constant pressure. The advantage of this modification is that more time is available for the fuel to completely combust. The ideal dual cycle consists of the following operations: • Process -: Isentropic compression • Process -3: Addition of heat at constant volume. • Process - Addition...
Consider an ideal cycle for compression ignition engines. What is this cycle called? Explain all of...
Consider an ideal cycle for compression ignition engines. What is this cycle called? Explain all of the processes in this cycle.
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio...
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio of 20 and a cut-off ratio of 1.8. Air is at 30°C and 100 kPa at the beginning of the compression process. It may be assumed that for the air, the specific heat, Cp and gas constant, R are 1.005 and 0.287 kJ/kg.K, respectively. Calculate: the temperature (K) of the air at the end of the following processes: (i) (a) compression (ii) combustion, (ii...
An ideal Diesel cycle has a compression ratio of 19.9 and a cutoff ratio of 1.30. Determine the maximum temperature of...
An ideal Diesel cycle has a compression ratio of 19.9 and a cutoff ratio of 1.30. Determine the maximum temperature of the air and the rate of heat addition to this cycle when it produces 212 hp of power, and the state of the air at the beginning of the compression is 97 kPa and 17°C. Use constant specific heats at room temperature. K (Round to the nearest integer) max kW (Round to one decimal place) in
An ideal Diesel...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of 2. At the beginning of the compression process P = 95 kPa and T = 20°C. (a) Find the temper- ature, pressure and specific volume at states 1, 2, 3, and 4. (b) Find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. (c) Calculate the thermal efficiency of a Carnot cycle...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
4.4 (14 pts) Dxaw the p-v and T-s graphs for an ideal, air standard DIESEL cycle....
4.4 (14 pts) Dxaw the p-v and T-s graphs for an ideal, air standard DIESEL cycle. Identify what happens during each process in the table below from each category as follows: (Use only those labels that apply) a. Compression, Heat Addition, Expansion, Heat Rejection b. Isentropic, Isometric, Isobaric, Isothermal (shorthand is acceptable) c. Work In, Work Out, Heat In, Heat Out (in proper variable form) Process a. C.
Ignition power stroke adiabatic expansion compression stroke adiabatic compression Pressure 4. (25 pts) in an internal...
Ignition power stroke adiabatic expansion compression stroke adiabatic compression Pressure 4. (25 pts) in an internal combustion engine, the compression ratio (c), or the ratio volumes in an expansion or compression step, is an important for calculating efficiency. An Otto Engine cycle consists of (see diagram to right): an adiabatic compression step (1-2), a constant volume heating step (2-3). an adiabatic expansion step (3-4), and a constant volume cooling step (4-1). Based on this information, show: a. V3/V4 = V2/...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio rp of...
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
Problem 3 In modern high-speed compression ignition engines, fuel is injected into the combustion chamber much sooner than in early diesel engines. That means, heat is added partly at constant volume and partly at constant pressure. The advantage of this modification is that more time is available for the fuel to completely combust. The ideal dual cycle consists of the following operations: • Process -: Isentropic compression • Process -3: Addition of heat at constant volume. • Process - Addition...
A four-stroke 2.0 Litre compression ignition engine operates on a Diesel cycle with a compression ratio of 20 and a cut-off ratio of 1.8. Air is at 30°C and 100 kPa at the beginning of the compression process. It may be assumed that for the air, the specific heat, Cp and gas constant, R are 1.005 and 0.287 kJ/kg.K, respectively. Calculate: the temperature (K) of the air at the end of the following processes: (i) (a) compression (ii) combustion, (ii...
An ideal Diesel cycle has a compression ratio of 19.9 and a cutoff ratio of 1.30. Determine the maximum temperature of the air and the rate of heat addition to this cycle when it produces 212 hp of power, and the state of the air at the beginning of the compression is 97 kPa and 17°C. Use constant specific heats at room temperature. K (Round to the nearest integer) max kW (Round to one decimal place) in
An ideal Diesel...
2. An ideal Diesel cycle has a compression ratio of 18 and a cut-off ratio of 2. At the beginning of the compression process P = 95 kPa and T = 20°C. (a) Find the temper- ature, pressure and specific volume at states 1, 2, 3, and 4. (b) Find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. (c) Calculate the thermal efficiency of a Carnot cycle...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
4.4 (14 pts) Dxaw the p-v and T-s graphs for an ideal, air standard DIESEL cycle. Identify what happens during each process in the table below from each category as follows: (Use only those labels that apply) a. Compression, Heat Addition, Expansion, Heat Rejection b. Isentropic, Isometric, Isobaric, Isothermal (shorthand is acceptable) c. Work In, Work Out, Heat In, Heat Out (in proper variable form) Process a. C.
Ignition power stroke adiabatic expansion compression stroke adiabatic compression Pressure 4. (25 pts) in an internal combustion engine, the compression ratio (c), or the ratio volumes in an expansion or compression step, is an important for calculating efficiency. An Otto Engine cycle consists of (see diagram to right): an adiabatic compression step (1-2), a constant volume heating step (2-3). an adiabatic expansion step (3-4), and a constant volume cooling step (4-1). Based on this information, show: a. V3/V4 = V2/...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
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