Quiz: Provide, Dispersion and LOPA Diagnosis- Individual CA2 Manufacture Diagnosis the utilization of Provide Model Deploy ALOHA tool and generate the toxic and dispersion contours. Summarize the outcomes and manufacture a comparison thru your statement. Manufacture LOPA to originate extra just security layer(s) Self-discipline: An ammonia storage tank leaks at its backside piping thru an efficient opening with a diameter of fifty mm. NH3 is saved under saturated liquid prerequisites at 11.58 bar and 30oC. Put of leak in piping is at 10-meter elevation above the bottom diploma. Ordinary crucial elements of the NH3 storage tank are proven within the next plot. a. Estimate NH3 liquid spill (in kg) unruffled within the backside dike in a single hour. (Judge (i) proper command between spill rate and evaporation rate. (ii) Evaporation happens over complete imperfect share of the dike). Estimate the total NH3 vapor liberate to air by flashing and evaporation. NH3 liquid temperature after depressurizing thru 50 mm opening to atmospheric stress (atmospheric boiling point of NH3) = – 33oC Ammonia liquid density at -33oC = 673.1 kg/m3 Heat of vaporization of NH3 at atmospheric stress= 1170.87kJ/kg Distinction particularly volume between vapor and liquid NH3= 1.38115 m3/kg Cp for NH3= 2.103 kJ/kg.K Dike dimensions: 10m(L) x 10m(B) x 0.6 m(H). (8 Marks) b. Manufacture toxic dispersion diagnosis for launched NH3 the utilization of ALOHA tool. Judge birth country prerequisites and atmospheric steadiness class B. Wind lag is 2 m/s. Judge a humidity of 80%. Web speak online’s ambient temperature is 30oC. Spend ALOHA Gaussian and Heavy gasoline dispersion models to originate ERPG1, ERPG2 and IDLH threat contours. Insist any assumptions extinct within the model. (6 Marks) c) Manufacture LOPA and originate an acceptable technique to chop the NH3 storage tank overpressure frequency to neatly inner the suitable frequency. Attributable to adjustments in NH3 make-up rate (necessary elevated than the favorite own rate), PSV on top of the NH3 storage tank is under sized. Operator mistake sooner or later of NH3 make-up would possibly maybe quit up in overpressure within the tank. Insist any assumptions extinct. Spend conventional PFD (likelihood of failure on inquire) values of security layers from lecture notes/ textbook or any other reference (If exterior offer of reference is extinct, please cite it clearly). If SIS (security instrumented machine) options are required, originate an SRS (Security requirement specs) document. (6 Marks) Initiating event frequencies for overpressure are: Initiating event Frequency Operator failure 10-1 per year Acceptable overpressure frequency for the location is 10-5 incidents/year. – submit by strategy of “Assignments” portal on Blackboard by 2359 hrs. Seventh Nov 202 Write My Project Rent a Professional Essay & Project Creator for finishing your Tutorial Assessments Native Singapore Writers Crew 100% Plagiarism-Free Essay Best Pleasure Price Free Revision On-Time Provide
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