University:
Swansea University
Course:
EG-086 | Engineering Science
Academic year:

2023
Views:

182

Pages:

3
Author:

Lloyd R.

23/07/2015. Thursday "lory to Gerd BRAYTON (OR) JOULE CYCLE * gas trobines wedes based on Proyton joule che Brayton cycle in is a constant pressure Gyere for a perfect gas. aled Called bule reversible conctent Cycle. gyele The heat transfers piscule heat ave achieved ess. As ideal exchogen. turbine plant would perform the proceed that mabes Braykn p It is represested below on Por and i-s chirigrams as shown PA Heater 24 HE-1 Work. c. Compressor To Turbine as follows: Various operations are as Operations 1-2: the air it compressed isentropically ifom the lower, piecsurel P, to the upper pressure Petbe temperedule nagy from Ti 1072 No heat flow ocur's operaton 2-3: H Heat flows, into the Volume fion Vs to Vs ast Systen tincreasing imperatures tiome The to T Bhilst the pressure remains Constant, at 12. Heat received mcp. (13-T2). operation 3-4: The air is expandred isentropically from P2 to Pi, the tempevecture falling from 13. Ho 74 лю heat flow occurs. operation 4-1: Heat is rejected from the system as the Volume decreases from Vf to vi and the fion 14 to. Ti, while the pressure Itemperature resams Constant at pi Heat rejected = micp (T4-TI). kloak danc Heat received - Heco vejeded) lar-standard Heat Supplied or Heat received titteat Supplied for Heat received. mcp (73-72) - Mcp (T4-71). 73-72 1- 74-71 13-12 Now from the iserstropic expansion, = T T2-T1(p) Similarly, and in 1- TH-Ty (4)(p) Air-stadad where p = pressure ratio. 1- 1 (7) Sind TH(P) Pressure Ratio for maximwn Inmork! P T32(5-1) T hlove Rato Work Rato is to the work odane defined as the rato the turbine. of net worse output Work ratio = W ] hihere, Wy Work abterned from this trokthe [ halc- Worte Supplied to the compressor. klok rato McPCT3-T4)- mep(T2-Ts) Mep (73-74) 1- (12-11) (T3-T4) -1- TI 73 1 Cop plark Patio (P) EL -