Engineering, 08.10.2019 01:20 destinyharris2586
Atoll plaza is capable of serving cars at a constant rate µ vph. cars arrive at a constant rate λ1 < µ until some time t = 0 (e. g., 7: 00 am), but from t = 0 until some time τ , they arrive at λ2 > µ (where λ1 and λ2 are in units of vph). after time τ , the arrival rate returns to λ1. suppose that vehicles not served immediately form a queue and are served first-in-first-out (fifo). draw a queuing diagram starting at time t = 0. derive expressions for each of the following in terms of the variables given (λ1, λ2, µ, τ ): (a) maximum excess accumulation of vehicles(b) longest delay experienced by any car(c) duration of the queue(d) total delay to all cars while queue is present
Answers: 1
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
Engineering, 04.07.2019 18:10
An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet
Answers: 3
Engineering, 04.07.2019 18:10
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
Atoll plaza is capable of serving cars at a constant rate µ vph. cars arrive at a constant rate λ1 &...
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