The method 9 including bypassing said {HEAD ~ another portion} of {TAIL ~ the compressor} discharge air around the expander during startup and shut down 
The method 9 including bypassing said { HEAD ~ another portion } of { TAIL ~ the compressor } discharge air around the expander during startup and shut down
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH