# Rankine Cycle Essay

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Results and Discussion a) Procedure a fully labelled schematic representation of the power plant used in this project. T1 = 30°C Patm = 1 bar Water Tank Condenser Tower W . P4, T4 P5, T5 Turbine Generator P3, T3 Throttle valve P2, T2 Q . Boiler b) Make use of (a) to describe the plant configuration and the function of each component Boiler Superheated steam boilers boil the water and then further heat the steam in a super heater. This provides steam at much higher temperature, and can decrease the overall thermal efficiency of the steam plant due to the fact that the higher steam temperature requires a higher flue gas exhaust temperature. Throttle valve Flow-restricting devices. It can causes the pressure drop in the fluid and meanwhile the heat change (∆q≈0), work done= 0, ∆potential energy≈0 and ∆ke≈0. Function: Clockwise to increase boiler pressure, anticlockwise to decrease boiler pressure Turbine / Generator The turbine is a rotary engine that extracts energy from a fluid flow. It is a heat engine that converts energy into mechanical energy. It makes use of the fact that steam, when passing through a small opening that attains a high velocity. Condenser The condenser is a major component of the power plant where it receive exhaust steam from the last stage of the turbine and condenses it to water for reuse as feed water in the boiler system. It can be classified under a direct contact type or a surface condenser. Other component(s) includes: Pressure gauge Steam turbine valve Burner switch Water level gauge c) (iv) The Rankine cycle efficiency Assume steady flow, KE = PE = 0 From a 1st law balance, we know energy in = energy out ------------------------------------------------- Device 1st Law Balance