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2. A. Design a theoretical nozzle in order to expand isentropically superheated steam (P₁ = 280 psia, To = 900 F) to a pressure of 120 psia at a flow rate of 1 lbm/sec. B. If the nozzle efficiency is to be 80%, compute the exit area at section 8(A)actual of the nozzle. 12345678

2. A. Design a theoretical nozzle in order to expand isentropically superheated steam (P₁ = 280 psia, To = 900 F) to a pressure of 120 psia at a flow rate of 1 lbm/sec. B. If the nozzle efficiency is to be 80%, compute the exit area at section 8(A)actual of the nozzle. 12345678

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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ANS A. 2. A. Design a theoretical nozzle in order to expand isentropically superheated steam (Po = 280 psia, To = 900 F) to a pressure of 120 psia at a flow rate of 1 lbm/sec. B. If the nozzle efficiency is to be 80%, compute the exit area at section 8(A₂) actual of the nozzle. SECTION P (psia) 280 260 240 220 200 180 160 140 120 B. 0 1 2 3 4 5 6 7 8 T (DEG F) 860 820 780 740 700 660 620 580 540 plot on a Mollier (h-s) diagram for full credit = Po To h (BTU/Ibm) 1451 1432 1411 1395 1375 1354 1334 1320 1295 V = 0.00223 ft² 12345678 (ft^3/lbm) 2.754 2.985 3.013 3.178 3.378 3.621 3.926 4.32 4.845 V² ho-he η = V₂ = 2784 ft/sec ho-he actual ho-he,ideal he actual 1316 BTU/lbm η = Steam Tables, pe = 120 psia & he actual = 1316 BTU/lbm →@ section 8, Ve,actual = 6.21 ft³/lbm Ve,actual 6.21 Ae,actual = Ve,actual 2784 C.V.
Transcribed Image Text:ANS A. 2. A. Design a theoretical nozzle in order to expand isentropically superheated steam (Po = 280 psia, To = 900 F) to a pressure of 120 psia at a flow rate of 1 lbm/sec. B. If the nozzle efficiency is to be 80%, compute the exit area at section 8(A₂) actual of the nozzle. SECTION P (psia) 280 260 240 220 200 180 160 140 120 B. 0 1 2 3 4 5 6 7 8 T (DEG F) 860 820 780 740 700 660 620 580 540 plot on a Mollier (h-s) diagram for full credit = Po To h (BTU/Ibm) 1451 1432 1411 1395 1375 1354 1334 1320 1295 V = 0.00223 ft² 12345678 (ft^3/lbm) 2.754 2.985 3.013 3.178 3.378 3.621 3.926 4.32 4.845 V² ho-he η = V₂ = 2784 ft/sec ho-he actual ho-he,ideal he actual 1316 BTU/lbm η = Steam Tables, pe = 120 psia & he actual = 1316 BTU/lbm →@ section 8, Ve,actual = 6.21 ft³/lbm Ve,actual 6.21 Ae,actual = Ve,actual 2784 C.V.
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