The indoor fan motor stops when the LPC is Select one: O a. Biological reaction O b. Faulty O c. None of the above O d. Not faulty
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- An eight-cylinder, four-stroke engine of 9 cm bore and 8 cm stroke with a compressionratio of 7 is tested at 4500 rev/min on a dynamometer which has 54 cm arm. During a 10minutes test the dynamometer scale beam reading was 42 kg and the engine consumed4.4 kg of gasoline having a calorific value of 44000 kJ/kg. Air at 27C and 1 bar wassupplied to the carburettor at the rate of 6 kg/min. Take R for air = 287 kJ/(kg·K). Find:(1) the brake power delivered (bp),(2) the brake mean effective pressure (bmep),(3) the brake specific fuel consumption (bsfc),(4) the brake specific air consumption (bsac),(5) the brake thermal efficiency (b, th),(6) the volumetric efficiency (vol), and(7) the air-fuel ratio (A/F) on mass basis.Draw the simplified schematic diagram of the plant showing all the necessary data displayed on it. "Please only draw on schematic diagram of the plant"An eight-cylinder, four-stroke engine of 9 cm bore and 8 cm stroke with a compressionratio of 7 is tested at 4500 rev/min on a dynamometer which has 54 cm arm. During a 10minutes test the dynamometer scale beam reading was 42 kg and the engine consumed4.4 kg of gasoline having a calorific value of 44000 kJ/kg. Air at 27C and 1 bar wassupplied to the carburettor at the rate of 6 kg/min. Take R for air = 287 kJ/(kg·K). Find: (4) the brake specific air consumption (bsac),(5) the brake thermal efficiency (b, th),(6) the volumetric efficiency (vol), and(7) the air-fuel ratio (A/F) on mass basis.Draw the simplified schematic diagram of the plant showing all the necessary data displayed on it.Initial condition: P = 8 MPax = 100%m = 5 kgProcess: IsothermalFinal condition: Q in KJ = 75% of h1Required: Work
- 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. 370.31There are two double-acting pneumatic actuators, the extension of each one is executed in 5 seconds at 80 psi and recoil in 4 seconds at 30 psi, the travel of both is 12 inches, the diameter of the piston is dp = 4 "and of the rod dv = 1"a) Determine the compression ratios. The local atmospheric pressure is 79kpa = (11.5 psi)b) Determine the air consumption in cubic feet per minute of free air PCMc) Determine the average air consumption for each.d) Propose the regulation values of the pressure switch, system pressure and safety valve1.1 Determine the electrical power supplied to a boiler when the temperature of the enteringwater is 20 C and the exiting temperature is 89 C. The flow of.the pressured water is 2 Kg/s. There is anegligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specificheat is c = 4,370 J/(Kg K). There is a 1.5(105) W rate of heat loss from the boiler during this process to asurrounding at 293.2 k. Consider steady state conditions.1.2 Calculate the total rate of entropy production in Problem 1.1.1.3 Calculate the total rate of exergy destruction (W) in Problem 1.1. The dead statetemperature is 293.2 K and pressure is 1 bar.1.4 Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to theconditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The highheating value (HHV) of the fuel is 50.02 MJ/kg.1.5 Calculate the exergy destroyed in the process described by problem 1.4. The exergy…
- 1.1 Determine the electrical power supplied to a boiler when the temperature of the enteringwater is 20 C and the exiting temperature is 89 C. The flow of.the pressured water is 2 Kg/s. There is anegligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specificheat is c = 4,370 J/(Kg K). There is a 1.5(105) W rate of heat loss from the boiler during this process to asurrounding at 293.2 k. Consider steady state conditions.1.2 Calculate the total rate of entropy production in Problem 1.1.1.3 Calculate the total rate of exergy destruction (W) in Problem 1.1. The dead statetemperature is 293.2 K and pressure is 1 bar.1.4 Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to theconditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The highheating value (HHV) of the fuel is 50.02 MJ/kg.1.5 Calculate the exergy destroyed in the process described by problem 1.4. The exergy…SUMMARIZED IN YOUR OWN WORDS THE RELEVANCE OF IST AND SECOND LAW OF THERMODYNAMICS IN YOUR CAREER AS A CIVIL ENGINEERAn 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.
- 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.There is a spring-mass system, driven by an external piston, which applies a force to it. Newtons that satisfies the following relation F = 6*cos (3*π*t), as can be seen in the figure, it is known that the spring constant has a value of k = 25 Nm, and the block has a mass of 4 kg, furthermore, dissipative frictional effects cause the relationship between velocity and force to satisfy the ratio F = bv, where b is the damping constant, and it is known that the numerical ratio of force is 10 times the value of speed. Determine: a) The natural frequency of the system. b) The driving frequency of the external force. c) The maximum value exerted by the external force. d) The damping constant. e) The amplitude of the forced oscillatory motion in steady state. f) If dissipative (damping) effects are neglected, what is the value of the amplitude.In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .