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- Please indicate the given, assumption and illustration. A large tank contains air at 2.84 bar gauge pressure and 24°C temperature. The air flows from the tank to the atmosphere through an orifice. If the diameter at the orifice is 2 cm, find the maximum flow rate of air, in kg/sec. Take R = 287 J/kg·K, k = 1.4, and ambient pressure = 1 bar.Energy balance results (in kW) obtained for the same medium speed single cylinder diesel engine are reported in the following table. For case 1, if the coolant temperature is 105 °C at the outlet of the engine and the volumetric flow rate is 0.22*10-3 m3/s, the temperature of the coolant at the inlet is (in °C): (The coolant is considered water with a density 999 kg/m3 and a specific heat 4.2 k/kg.K). Case N (rpm) bmep (bar) W. O ambient Q ahast shaft 2.2 4.2 19.1 60.3 9.90 3.52 1 500 7.1 24.5 23.8 500 6.1 3.6 5.2 400 3.50 4.9 4.1 1.4 Select one: O a. 142.1 O b. 112.7 O c. 97.31 O d. 87.2 O e. 370.31In a steam turbine system, suppose the value of ∆mH is constant (meaning, inlet and outlet conditions are maintained). From the energy balance equation, Qnet + Wnet = ∆mH + ∆KE + ∆PE or −0.1209 kW − 70 kW = ??̇? + 8.75 kW − 0.0068kW 1. What will happen to Wnet if there was no increase in kinetic energy, will the magnitude of Wnet increase or decrease? What should be the sign of potential energy so that Wnet will increase in magnitude?2. For a turbine system, what should happen to Qnet, ∆KE, and ∆PE to maximize the work done by the turbine? Which factor is the most significant?
- SHOW COMPLETE SOLUTION THANK U 1. Steam expands steadily at a constant temperature. The flow rate is 13.6 kg/min with an inlet state of wet steam (water) at 80% quality to a final state of 700C and 2.5 MPa. The change of kinetic energy across the device is 3.5 kJ/kg, and the heat added is 21.81 kW. Determine (a) the enthalpy of conditions 1 &2, (b) the heat transfer in kJ/kg, (c) the work, and (d) the system power.Solve please, should 100% sure of ans. Air enters a well-insulated turbine operating at steady state with a negligible velocity at 4 MPa and 300 oC, It exits the turbine at 100 kPa pressure at 100 oC. The diameter of the exit pipe is 60 cm. The velocity at exit is 90 m/s. a. What is the volumetric flow are at the exit? Express your result in units of m3/s. b. What is the molar flow rate at the exit? Assume that at the exit conditions, air may be considered to behave like an ideal gas. Express your results in units of mols/s c. What is the mas flow rate? Express your result in units of kg/s.Assume 5 lb/sec of fluid enter a steady flow system with P1=100 psia, ρ1=0.2 lb/cu.ft., v1=100 fps, u1=800 BTU/lb. and leave with P2 = 20 psia, ρ2=0.05 lb/cu.ft, v2=500 fps, and u2=780 BTU/lb. During passage through the open system, it rejects 10 BTU of heat. Determine: (a) the change in kinetic energy in horsepower CHOICES 33.88 18,63354 35.66 (b) the change in internal energy in horsepower CHOICES -141.509 141.509 -100.00 (c) the change in flow work in horsepower CHOICES -130.909 -72,000 130.909 (d) the turbine work of the system in horsepower CHOICES 309.294 167.8 268.7
- 1000CFM of air are compressed at constant temperature of 85°F and 198 psia to 580 psia. For both nonflow and steady flow, compute ⌠pdv, -⌠Vdp, ▲S and ▲H.1) A plot of pump net head is shown below. Two curves are drawn: blue color curve and red color curve. Which one is called pump performance curve? Will the location of pump performance curve change if the velocity of the fluid at pump outlet changes? a) red curve; No, the location will not change b) blue curve; yes, the location will change c) red curve; yes, the location will change d) blue curve; No, the location will not change 2) In a turbine system, states A and B are homologous. If the net head ratio HA/HB =16 , volume flow rate ratio VA˙/VB˙=9. What is the diameter ratio DA/DB ? a) 3/2 b) 6 c) 12 d) 2/3In a three-stage compressor, the pressure ratio in each stage is equal and its value is 1.3, the first inlet temperature to stage 300K, outlet pressure from first stage 1000mmHg, , Polytropic yield 0.92. m C1 C2 = C2s C3 C3s = 500 "It s Isentropic exponent=1.4, coefficient of heating heat under constant pressure= 1005 kgK' your mercury density= 13550 and gravitational acceleration= 9.81 m3 m3 a) Find the actual and isentropic temperature of the exit from the 1st stage. b) Find the actual and isentropic temperatures of the exit temperatures from the 2nd stage. c) Find the real and isentropic work consumed in Stage 2. d) Put the available data and your calculations in the compressor (h-s) diagram.
- A rocket motor with chamber pressure and temperature of 2.04 MPa, 2200 K, operates at sea level where pressure is 0.1 MPa. Find thrust produced and specific impulse for propellant consumption of 1.0 kg/s. Take cp = 1500 J/kg K, k = 1.3, g = 9.807 and R = 346 J/kg K. Find also thrust when the pressure inside the nozzle is 50% of initialSubject: Thermodynamics, Last student Digit is 5, so T= 200, p(kpa)= 450An office to be air conditioned for 50 staff when the outdoor conditions are 30°cDBT and 75% RH if the quantity of air supplied is 0.4m3/min/per find i) Capacity of cooling coil ii) capacity of heating coil iii) amount of water vapourremoved per hour. Assume that required air inlet conditions are 20°c DBT and 60% RH air is conditioned first by cooling and dehumidifying and by heating. Ifthe heating coil surface temperature is 25°c, find the bye pass factor of the heating coil.