1. In a biological reactor of Volume m compressed air pressure increases from 1.5 bar (Pin) to 3.0bar (Pout) at an air flow rate of 500 m/h If the temperature is 25°C, density of air is 1.184 kg/m³ ,the overall mass transfer coefficient KLa is 3.5/h, air saturation concentration at 20°C at a point x=15 is 8mg/L Calculate the power of the compressor and its efficiency.

1. In a biological reactor of Volume m compressed air pressure increases from 1.5 bar (Pin) to 3.0bar (Pout) at an air flow rate of 500 m/h If the temperature is 25°C, density of air is 1.184 kg/m³ ,the overall mass transfer coefficient KLa is 3.5/h, air saturation concentration at 20°C at a point x=15 is 8mg/L Calculate the power of the compressor and its efficiency.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.39P

See similar textbooks

Similar questions

Natural gas, with the thermodynamic properties of methane, flows in an underground pipeline of 0.6 m diameter. The gage pressure at the inlet to a compressor station is 0.5 MPa; outlet pressure is 8.0 MPa (gage). The gas temperature and speed at inlet are 13C and 32 m/s, respectively. The compressor efficiency is η = 0.85. Calculate the mass flow rate of natural gas through the pipeline. Label state points on a Ts diagram for compressor inlet and outlet. Evaluate the gas temperature and speed at the compressor outlet and the power required to drive the compressor.
An 80 mm diameter hole is punched into a large vessel storing air at 300 K and 10 atm[abs]. Calculate the (initial) mass flow rate through the hole if the ambient pressureequals: a) 1 atm [abs]; and b) 0 atm [abs]. gamma = 1.4, R = 287 J/kgK PLease show all work!!
An exhaust stream exits a plant at 1 atm and 160˚C at a rate of 1 m3/hr. Unfortunately, it includes 60,000 ppm of heptane, which was used as a solvent. Not only will this heptane contribute to ozone formation upon release, but this solvent costs $1.80 / L. The lost solvent, which has a specific gravity of 0.7, must be replaced when it exits in the exhaust. Consider proposing a cost-benefit analysis to the plant manager. One solution is to cool the exhaust stream, which requires energy and equipment. To recover 35% of the heptane before it is released to the atmosphere, what temperature would the exhaust need to be before exiting? How much money could the proposed equipment and operation cost per day while still breaking even?
19. Consider a heat exchanger made of sheets of parallel flat plates. Water at 25 C, 1 atm, and 4 m/s flows over a plate. Find the water flow rate in the boundary layer of one plate at 10 cm from the leading edge.
You are being tasked as a wind tunnel engineer to investigate the performance of newly designed high-speed wind tunnel in UPNM. An exhaust gas flows through a nozzle where the inlet area is 5,000 cm2.At this inlet, the gas has a velocity of 1,200 m/s, temperature of 1,500oC,and pressure of 6,000 kPa. Initial measurement revealed that the pressure at the exit of the wind tunnel is 100 kPa. Based on this information, analyze and investigate ; i. Mach number at inlet of the nozzle ii. The velocity of gas at exit iii. The area of the nozzle at exit Take specific heat ratio for the exhaust gas, ? to be 1.7 and the gas constant, R to be 205 J/kg.
An ideal gas in which the pressure P is related to the volume V by the equation PV=60 m2/s2 flows in a steady isothermal flow along a horizontal pipe of inside diameter di =0,04m. The pressure drops from 0.5 atm to 0.35 atm in a 1000 cm length. Calculate the mass flowrate in kg/(sm2) if we can assume that the friction factor jf stay constant at a value of 5,2´10-3.
Furnace walls are lined by 3 layers: firebrick with a thickness of 6 in (k=0.95 Btu/h.ft. F), insulating brick (k-0.4 Btu/h.ft.°F) and common brick (k=0.8 Btu /h.ft.°F) Firebrick inlet temperature, T₁ = 1800°F, maximum insulating brick temperature, T₂ = 1720°F and T3 = 280°F. 1. Calculate the thickness of the insulating brick layer. 2. If the common brick is 9 in, calculate the exit temperature.
A steam generator generates flue gas at an average temperature of 260 C inside a Chimney. The theoretical draft is 0.5 kPa and the ambient condition of the air is 21 C and 100 kPa. Assume the coefficient velocity to be 0.30 and the molecular weight of the flue gas is 32. For air-fuel ratio requirements per second of 15, calculate: a. The diameter of the Chimney, meter b. The theoretical draft, cm H₂O
Water enters a uniformly heated vertical tube of diameter 2.5 cm and length 4.5 m. Total heat applied to the tube is 650 kW. Inlet pressure, temperature, and mass flow rate of water are given as 100 bar, 285 C, and 1.5 kg/s, respectively. Find the pre-heating length, exit quality, and various pressure differentials terms.
8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg ofcoal at barometric pressure of 98.2 KPa. The flue gas has temperature of 285 degree Celsiusand an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocityof 7.5 meters per second. Find the diameter of the chimney 9. The gas density is 0.75 kg per cubic meters and air density is of 1.15 kg per cubic meter. If thedriving pressure is 0.25 KPA. Determine the height of the chimney. 10. A powerplant situated at an altitude having an ambient air of 96.53 KPa and 23.88 degreeCelsius. Flue gases at a rate of 5.0 kg per second enter the stack at 200 degree Celsius andleaves at 160 degree Celsius. The flue gases gravimetric analysis are 18% CO2, 7% O2 and 75%N2. Calculate the height of the stack necessary for a driving pressure of 0.20 KPaKindly answer all please. Thank you
A liquid food is heated in a tubular heat exchanger. The inside pipe wall temperature is 110°C. The internal diameter of the pipe is 30 mm. The product flows at 0.5 kg/s. If the initial temperature of the product is 7°C, compute the convective heat-transfer coefficient. The thermal properties of the product are the following: specific heat = 3.7 kJ/[kg°C], thermal conductivity = 0.6 W/[m °C], product viscosity = 500 x 10^-6 Pa s, density = 1000 kg/m³, product viscosity at 110°C = 410 x 106 Pa s. The length of the heat exchanger is 1m.
Water at 10C temperature flowing from a pipe with a diameter of 100mm at a speed of 2m / s, air from a pressure of 2 ATM at 180F flowing at a speed of 50 ft / s from a pipe with a diameter of 2 in, and an oil with a specific gravity of 0.78 and a diameter of 20 cp at a speed of 5 ft / s through a 2in pipe. Shows the flow state of the biopolymer melt flowing through the pipeline at a speed of 0.2 m/s, with a density of 900 kg/m3 and a density of 1 Pa-s