If ηgs is gross stage efficiency; ηb is blade efficiency and ηn is nozzle efficiency of a steam turbine, then which of the following relations is correct?
1
ηgs = ηb
2
\(\eta_{\mathrm{gs}}=\frac{\eta_{\mathrm{n}}}{\eta_{\mathrm{b}}}\)
3
\(\eta_{\mathrm{gs}}=\frac{\eta_{\mathrm{b}}}{\eta_{\mathrm{n}}}\)
4
ηgs = ηb × ηn