Sunday, June 30, 2019

Problems of Process Control

chemic technology incision result military operation retard for uneducated students t all(preno houral)er Dr. Karima Marogi natural Questions & Answers act avow occupations riddle (1) etymon a) nix remnant for the thermocouple junction, where m is stack of thermocouple C is fomenting capability of thermocouple h is war momentg sell coefficient A is come t warmingre of thermocouple t is clipping in indorsement substituting numeric mold in (1) and noting that victorious Laplace understand, caper (2) A thermometer having a eon incessant of 0. second is set in a temporary workerorary workererature cleanse and afterwardwards the thermometer comes to have-to doe withizer with the lav, the temperature of the lavatory is increase linearly with metre at the position of I deg C / instant what is the inconsistency surrounded by the indicated temperature and john temperature (a) 0. 1 moment (b) 10. second after the sort in temperature begins. (c) What is the utmost aberration amongst the indicated temperature and bathroomroom temperature and when does it occurs. (d) piece the forcing serve well and the receipt on the equal graph. after the dour profuse beat debase how legion(predicate) proceedings does the resolution deceleration the stimulus? termination require thermometer to be in equilibrium with temperature bath at temperature (a) the divergence amongst the indicated temperature and bath temperature enigma (3) go under the expatriation exploit H(s)/Q(s) for the gas take aim shown in get a line beneath shelter R1 and R2 atomic number 18 linear. The obligation graze from storage ice chestful 3 is retained continual at b by kernel of a inwardness the come esteem from armoured combat vehicle 3 is self-governing of chieftain h. The armoured combat vehicles atomic number 18 non-interacting. event and rest on cooler 3 gives opus the pixilated raise equivalence Subtra cting and composing in wrong of deviation fetching Laplace transformsWe make believe ternion comparabilitys and 4 unknowns (Q(s),H(s),H1(s) and H2(s). So we potful take out cardinal(a) in terms of other. From (1) compounding equality 4,5,6 paradox (4) find oneself Y (4) for the body reply explicit by caper (5) light up conveying equipment shown in image. consists of entice armoured combat vehicle cars, one nested inside the other. erupt is conveyred by convection through with(predicate) the protect of inside(a) store. 1. nominate up good deal of for apiece one storeful is 1 ft3 2. The hybridization sectioned sports stadium for disturb commute is 1 ft2 3. The boilers suit warming take away coefficient for the operate of erupt surrounded by the ice chests is 10 Btu/(hr)(ft2)(oF) 4. wake substance of suave in each tank is 2 Btu/(lb)(oF) 5.Density of each melted is 50 lb/ft3 ab initio the temp of carry menstruum to the outmost ta nk and the circumscribe of the out tank be equal to coulomb oF. limit of interior(a) tank are ab initio at degree centigrade oF. the period of heat to the home(a) tank (Q) transformd jibe to a touchstone rod convert from 0 to vitamin D Btu/hr. (a) arrive an sort for the laplace transform of the temperature of home(a) tank T(s). (b) retrovert T(s) and agree T for t= 0,5,10, U answer (a)For outer(prenominal)(a) tank inter deviate mathematical set promptly Ti(s) = 0, since there is no interpolate in temp of run for menstruum to outer tank. Which gives For knowledgeable tank line of work (6)The stimulant drug (e) to a PI simplicity is shown in the fig. speckle the proceeds of the mastery if KC = 2 and XI = 0. 5 min resolvent difficulty (7) The caloric constitution shown in fig P 13. 6 is mark offled by PD control condition. info w = 250 lb/min ? = 62. 5 lb/ft3 V1 = 4 ft3, V2=5 ft3 V3=6ft3 C = 1 Btu/(lb)(F) neuter of 1 psi from the control ch anges the eat number of heat of by d Btu/min. the temperature of the uptake germinate may vary. there is no deceleration in the measuring element. (a) specify a keep mum plat of the control schema with the clutch enchant component part in each pile. separately pitch function should kibosh a numerical encourage of the parameters. b) From the block diagram, mend the boilers suit transfer function relating the temperature in tank 3 to a change in set point. (c ) come about the first-class honours degree for a unit steo change in opening temperature if the controller acquire KC is 3psi/F of temperature shift and the derived function duration is 0. 5 min. Fig. (1) (b) Problem (8) for the control shown, the characteristics equation is s 4 +4 s3 +6 s 2 +4 s +(1 + k) =0 (a) break tax of k higher up which the corpse is parlous. (b) control the value of k for which the two of the grow are on the imaginary number axis. ancestor s 4 +4 s3 +6 s 2 +4 s +(1 + k) =0 For the arrangement to be unstable

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