Science – Society – Technology
Table 1 Conventional exergy balance equations (Sun and Liu 2020)
From: Conventional and advanced exergy analysis of a single flash geothermal cycle
Component | Exergy of fuel (or driving input) (\({\dot{E}}_{F,k}\)) | Exergy of the product (or desired value) (\({\dot{E}}_{P,k}\)) | Exergy destruction (or internal exergy loss) (\({\dot{E}}_{D,k}\)) |
|---|---|---|---|
Expansion Valve | \({\dot{E}}_{F,EV}={\dot{m}}_{1}{e}_{1}\) | \({\dot{E}}_{P,EV}={\dot{m}}_{1}{e}_{2}\) | \({\dot{E}}_{D,EV}={\dot{E}}_{F,EV}-{\dot{E}}_{P,EV}\) |
Steam Turbine | \({\dot{E}}_{F,T}={\dot{m}}_{3}{(e}_{3}-{e}_{4})\) | \({\dot{E}}_{P,T}={\dot{W}}_{T}\) | \({\dot{E}}_{D,T}={\dot{E}}_{F,T}-{\dot{E}}_{P,T}\) |
Condenser | \({\dot{E}}_{F,Cd}={\dot{m}}_{3}{(e}_{4}-{e}_{5})\) | \({\dot{E}}_{P,Cd}={\dot{m}}_{3}{(e}_{11}-{e}_{12})\) | \({\dot{E}}_{D,Cd}={\dot{E}}_{F,Cd}-{\dot{E}}_{P,Cd}\) |
Pump | \({\dot{E}}_{F,P}={\dot{W}}_{P}\) | \({\dot{E}}_{F,P}={\dot{m}}_{7}{(e}_{8}-{e}_{7})\) | \({\dot{E}}_{D,P}={\dot{E}}_{F,P}-{\dot{E}}_{P,P}\) |
Mixer | – | – | \({\dot{E}}_{D,Mix}={\dot{E}}_{F,Mix}-{\dot{E}}_{P,Mix}\) |
Overall system | \({\dot{E}}_{F,tot}={\dot{W}}_{P}\) | \({\dot{E}}_{P,tot}={\dot{W}}_{T}\) | \({\dot{E}}_{D,tot}=\sum {\dot{E}}_{D,k}\) |