Derive the Steady Flow Energy Equation from the first principles
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The temperatures of the 20 ºC 25 ºC 30 ºC water at outlet
Task 2
Derive the Steady Flow Energy Equation from the first principles
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- How much heat must be removed from 60 Ib of ice at 20 °F to lower its temperature to -20 °F? * 4.1 x 10*6 BTU O 1.2 X 10°3 BTU 2.01 X 10 ^3 BTU 5 x 10*6 BTU A cork 2 cm. in radius is used to close one end of the tube whose other end is connected to a vacuum pump. The pump removes virtually all the air from the tube. How much force would be needed to pull the cork out? * 115 N 143 N O 127 N 177 N Find the pressure on a scuba diver when it reads 30 meter below the surface of the sea. (Density of sea water is 1.03 X kg10^3 kg/m3) * 4 Bar 2 Bar 5 Bar З Bar1. The mean effective pressure of an engine running at 300 rpm is 500 kPa. What is the indicatedpower if the engine has bore of 250 mm x 450 mm. Select the correct answer below: A. 110.5 kW B. 150 kW C. 200 kW D. 182. 2 kW 2. In a certain process, entering is 1500 KJ/kg and 150 m/s. If the energy leaving is 12000 Kj/kg/ Determine the velocity at exit. Select the correct answer below: A.) 145 m/s B. 1020 m/s C. 789 m/s D. 978 m/sQ1- Suppose that we have two system to increase the air temperature from 17°C to 52°C and both of them operating at constant air pressure as shown in below figures. System 1: The air temperature is increased as a consequence of the stirring of a liquid surrounding the line carrying the air. T=17°C P=100 kPa Viscous Fluid T=17°C P=100 kPa System 1 System 2: The air temperature is increased by passing it through one side of a counter-flow heat exchanger. On the other side, steam condenses at a pressure of 100kPa from a saturated vapour to a saturated liquid. Saturated liquid water P=100 kPa 2 T=52°C P=100 kPa Saturated water vapour P=100 kPa System 2 2 T=52°C P=100 kPa Both systems operate under steady conditions and are sufficiently insulated to prevent significant heat transfer with the surroundings. For each of the two systems, calculate the rate of entropy production, in
- 2. In a 30-minute trial of an oil engine running at 1750 rpm, the engine consumes 27.3 kg of fuel with a calorific value of 42,300 kJ/kg at a brake torque of 1640 N-m. There are 880 kg of jacketed cooling water system in the engine entering at 17 deg C and leaves at 77 deg C. There are 310 kg of air entering the intake manifold. The temperature of air at the intake manifold is 19 deg C and the temperature at the exhaust manifold is 586 deg C. Assuming mean specific heat capacity of exhaust gas to be 1.25 kJ/kg-K, determine the following A) The brake horsepower in B) Energy chargeable to the engine in kJ/min C) Cooling loss in kJ/min D) Exhaust loss in kJ/min E) Radiation and kJ/min Unaccounted Losses in2. In a 30-minute trial of an oil engine running at 1750 rpm, the engine consumes 27.3 kg of fuel with a calorific value of 42,300 kJ/kg at a brake torque of 1640 N-m. There are 880 kg of jacketed cooling water system in the engine entering at 17 deg C and leaves at 77 deg C. There are 310 kg of air entering the intake manifold. The temperature of air at the intake manifold is 19 deg C and the temperature at the exhaust manifold is 586 deg C. Assuming mean specific heat capacity of exhaust gas to be 1.25 kJ/kg-K, determine the following D) Exhaust loss in kJ/min E) Radiation and Unaccounted Losses in kJ/minFor the Figure shown, answer the following three questions Oxygen is first at a pressure of 250 kpa and 300 C, piston mass and diameter are 35 kg. and 0.1 m respectively and initially pushes against stops. The outside atmosphere is at 30 C and 100 kpa The cylinder is cooled to ambient temperature as heat is transferred to the surroundings 7- the temperature when the piston start moving down is а. 56 С b. 200 C c. 27.5 C d. 30 C Air 25 сm 8- The pressure of the gas when the temperature reaches ambient is a. 203.2 kpa b. 131.2 kpa c. 143.7 kpa d. 250 kpa 9- The distance that the piston dropped when the temperature reaches ambient is a. 0.53 cm b. 2.04 cm c. 0.64 cm с. d. 5.3 cm 10- Distillation columns are part of a. fuel cells b. commercial refrigeration cycles c. steam power plants d. air separation plants
- te= Esys! Q4. The change in the total energy of the closed system is (9-w=Abっ)レ -Q5. The sum of the 'energiesCarried by the mass in open system is.masshalase Emi ={me Q-w=AH flmid.Aroletbie..haT ehangs withh Tu 06. The general form of first law of thermodynamics for open system. Q7. Un steady state flow process is defined as.USE 4 DECIMAL PLACES ON YOUR FINALANSWERS DO NOTUSE SCIENTIFIC NOTATIONS NO NEED TO INPUT THE UNITS A Liquid fluid with a density of 1,750 kg/m3 from an elevated 2m open reservoir (P1=0 bars) flows before the pump at 7.5 m/s. The liquid fluid is pumped at an unknown final velacity to a 75 meter elevated tank with a pressure reading of 7.75 Bars. assuming Friction losses is 757.75J and the actual WORK of the pump is 1,933,400J. Calculate the power in HP if the pump's efficiency is just 75% and for every 1,000 kg of fluid per hour.The pressure ratio during the constant volume portion of combustion in a Dual Combustion engine is 1.89 . If the pressure at the end of the constant volume addition of heat is 4.49 , what is the pressure at the beginning?
- An engine rated at 20 kW uses 1.5 kg of fuel in 1000 s. If the enthalpy(energy content) of the fuel is 53,300 kJ/kg, determine the efficiency ofthe engine. use enthalpy equation to find Q answer = 25% please show all workingsIf there are five different Carnot engines (C1, C2, C3, C4 and C5) with low temperature reservoirs are at 7 "C, 10 °C, 13 "C, 15 °C and 18 °C respectively and each engine has efficiency of 60%. It is desired to increase the efficiency of each engine to 75 %. By using the selections statements calculate that how many degree the temperature of the source of each Carnot engine be increased separately. Do a subplot of bar and stem Plot of the temperature of the source against each heat engine Cl, C2, C3, C4 and C5. [Hint: Efficiency of heat engine is , Use else if else as selection statement. And take all the inputs by using input command and take all the outputs by using fprintf command.]1. A 451 mm x 491 mm air compressor has a piston displacement of 0.9 m^3/s. Determine the operating speed of the compressor (rpm) Answer in whole number 2. The initial condition of air in an air compressor is 99 kPa and 30 deg. C and discharges at 438 kPa. The bore and stroke are 374 mm and 395 mm, respectively. The percent clearance of 11 % running at 356 rpm. Find the volume of air at suction in m^3/s Answer in one decimal places 3. A single stage air compressor hadles 0.454 m^3/sec of atmospheric pressure, 27 deg. C air, and delivers it to a receiver at 652.75kPa. Compression is isothermal. Determine the work in kW 4. An air compressor is to compress 8.878 m^3/min from 98.881 kPa to 988.493 kPa. Assuming condition is ideal, and n=1.3 What will be the work in kW due to 2 staging Answer in whole number