A spark ignition engine based on Otto cycle has a working temperature range of 25.0 °C and 700.0 °C and its output power is 200 kW. The efficiency of this engine is found to be 56.5%. a. Calculate the compression ratio (r). b. Calculate the input power. c. Calculate the mass flow rate (kg/sec) of air. d. Consider reducing the air emission by 10% while keeping the same materials for key components of the engine, maximum engine temperature of 700.0 °C and input power obtained from part (b). Propose modification and analysis the possible impact on other physical properties. [for air cp = 1.003; c, = 0.717 J/kg-K]

(can expect help me on questions 5-10 of my this practice problem statement ?)The container truck engine operated on the diesel cycle with a compression ratio of 12. Assume the mass of air in the engine is conserved. At the start of the compression process, the air is at 1 atm and 30 oC. 400 kJ/kg of heat is removed from the air during the constant-volume heat rejection process. The ratio of . Through the diesel cycle, 20% of the work done by the air is used to operate the vehicle's refrigeration and heat pump system. One diesel cycle took 0.7s to complete. The heat rejection from the refrigeration and heat pump system is 800 kJ. The refrigeration system uses R-134a as the working fluid and operates between 100 kPa and 1200 kPa pressure limits. cp = 1.005 kJ/kg/K, cv = 0.7177 kJ/kg/K, R = 8.314J/mol/K, Molecular mass of air= 29g/mol.   1) Calculate the temperature at the start of the heat rejection process. 2) Calculate the temperature at the end of the heat addition process. 3)…

3. For the gas system power illustrated in Figure 3 (with the air-standard analysis assumptions), calculate thermal efficiency, back work ratio, and Weycle -10 P₁ = 100 kPa T₁ = 350 K Oia Heat exchanger Heat exchanger Qout T₁ - 1500 K Turbine Wycle 1 T₁ - 1500 K p= 1000 kPa p= 100 kPa T₁ = 350 K Figure 3. Operating condition of a gas power system cycle (The P-V and T-S diagram)

A 4 liter (2 liter per revolution at standard pressure and temperature) spark ignition has a compression ratio of 8 and 2000 KJ/kg heat addition by the fluid combustion. Considering a cold air standard Otto cycle model, how much power(kw) will the engine produce when operating at 2500rpm?