The flow rate of the feed to the reactor in a chemical production plant is given by the equation: npr* F 8nl If r and l both increase by 5% and p and ŋ decrease by 10% and 30% respectively, find the approximate percentage change in F.
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- The capital cost of a hydro-power station of 50 MW capacity is Rs 1,000 per kW. The annual depreciation charges are 10% of the capital cost. A royalty of Re 1 per kW per year and Re 0·01 per kWh generated is to be paid for using the river water for generation of power. The maximum demand on the power station is 40 MW and annual load factor is 60%. Annual cost of salaries, maintenance charges etc. is Rs 7, 00,000. If 20% of this expense is also chargeable as fixed charges, calculate the generation cost in two part form.Given that h=30 mm, μ=0.002 Pa.s and ρ=1000 kgm-3 Consider a steady-state turbulent flow between parallel plates the distance between palates is h. The velocity distribution across the channel is described by power law function. Express the mean flow velocity through the maximum flow velocity for a max velocity flow of 3 m/s. Determine the ratio between the mean (average) flow velocity to the mean flow velocity in a pipe (if D=h), if the maximum velocities are equal for both the cases. Calculate the pressure gradient in a flat channel, using the Blausius equation for a pipe of a circular cross-section using an equivalent pipe diameter concept.In our country, using natural resources, it is desired to generate electricity by placing a turbine between two water sources. The tangential velocity to the impeller of this turbine is calculated by the formula u = kuLaTeX: \ sqrt {2gHo} 2gHo. Here; The tangential velocity coefficient can be taken as ku = 0.46 ± 0.02, the head which represents the net energy in the turbine as H0 = 650 ± 5% m and the gravitational acceleration as 9.81 m / s2. Find the tangential velocity and the percentage error at that velocity.
- In the system, 900 L/min of oil is pumped with (s=0.92), from an underground storage tank to the first stage of a processing system. If the loss in the suction line is 1.5m and the loss in the discharge line is 4.5m. The suction line is 2.5” and the discharge line is 1.5”. Determine a) the outlet pressure in psi of the pump. b) The power in hp of the pump1. The figure shows a pump that draws 840 L/min of crude oil (s= 0.85) in an underground storage drum to the first stage of a processing system; a) If the total energy loss in the system is 4.2 N m/N of oil flow, determine the power transmitted by the pump to the fluid. b) If the energy loss in the steel suction line is 1.4 N m/N of oil flow, determine the pressure at the pump inlet(20) Question 2 A hydraulic motor is directly coupled to the drum of a belt conveyor. The drum diameter is 0.75 m, the conveyor belt moves at a speed of 3 m/s and the motor must transfer a torque of 995 Nm to the drum. Assume the pressure drop across the motor is 22 MPa and that the motor has an overall and mechanical efficiency of 0.92 and 0.96 respectively. Determine the displacement volume of the motor, the flow rate required in litres per second and the hydraulic power supplied to the motor.
- 5) 6.12 %79. Two taps fill the water tank with different flow rates. Tap A fills the tank in 2 hour and tap B fills the tank in 8 hour. If we open two taps together, find the final temperature of the water in the tank. The temperature of the water from tap A is 10 oC, from tap B 50Three pumps are connected in series. According to pump performance curves, the free delivery of each pump is as follows: Pump 1: 1600 L/min Pump 2: 2200 L/min Pump 3: 2800 L/min If the flow rate for this pump system is 2500 L/min, which pump(s) should be shut off? (a) Pump 1 (b) Pump 2 (c) Pump 3 (d) Pumps 1 and 2 (e) Pumps 2 and 3Water at 20 C is pumped from a tank to another tank at a height of 2 m at a flow rate of 800L/H . The pump utilizes an energy of 3 hp.There is a total loss of heat from the system at a rate of 3500Btu/h.The system operates under steady state conditions.Answer the following questions. a)Draw the process. b)Write the general energy balance equation and apply it to this process. c)Calculate the final temperature of the water
- Data: Hp2,3 = 2 m; A3 = 20 cm²; A₂ = 1 cm²; Hp0,1 = 0.8 m; NB= 74%(pump efficiency) To determine: a) the flow (L/s); b) the area of section (1) (cm³); c) the power supplied by the pump to the fluid.A turbine is located at an elevation 200 m. below the surface of the water intake. The friction loss in the pipeline leading to it is 8 m and the turbine efficiency is 90%. Compute the input power delivered by the water to the turbine if the flow is 3 m3/s in KW. a.5650.56 b.4576.95 c.192.0Energy 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. 370.31