NPGS Field Trip 4/9/16

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4/9/16 09:32  AM
4/9/16 09:32 AM
Map of the Patuah geothermal field.
4/9/16 09:35  AM
4/9/16 09:35 AM
Explanation from Patuah’s Operations Manager.
4/9/16 09:45  AM
4/9/16 09:45 AM
Tectonic background from Prof. Faulds.
4/9/16 10:31  AM
4/9/16 10:31 AM
Patuah operational concept.
4/9/16 10:41  AM
4/9/16 10:41 AM
Patuah’s control room.
4/9/16 10:57  AM
4/9/16 10:57 AM
Expander and impeller driving the Patuah Unit 3 generator. Why the straightjacket?
4/9/16 10:57  AM
4/9/16 10:57 AM
All of Patuah’s pumps have variable-frequency control. Cooling the little building with the VFC electronics takes a 10-ton AC unit!
4/9/16 10:57  AM
4/9/16 10:57 AM
Impeller-expander and 8 MW Unit 3 generator, driven by non-volatile refrigerant ($3/pound).
4/9/16 10:57  AM
4/9/16 10:57 AM
Unit 3 generator, one of three constructed.
4/9/16 10:58  AM
4/9/16 10:58 AM
Very large flexible coupling!
4/9/16 10:58  AM
4/9/16 10:58 AM
4/9/16 10:59  AM
4/9/16 10:59 AM
Refrigerant headed to the fan rack.
4/9/16 11:00  AM
4/9/16 11:00 AM
Looking through the refrigerant exiting Unit 3.
4/9/16 11:01  AM
4/9/16 11:01 AM
Pump station.
4/9/16 11:03  AM
4/9/16 11:03 AM
Patuah Unit 2
4/9/16 11:05  AM
4/9/16 11:05 AM
Equipment for Units 4, 5, 6 was purchased, and these fan racks were delivered, but only Units 1-3 were built.
4/9/16 11:10  AM
4/9/16 11:10 AM
Explanation that the 15 MW net power leaves Patuah, is carried by NV Energy into California, transfers up into Oregon via PG&E, goes back into California via Bonneville Power, then eventually reaches Sacramento Municipal Utility District!
4/9/16 11:10  AM
4/9/16 11:10 AM
Substation
4/9/16 11:13  AM
4/9/16 11:13 AM
Unit 1 heat exchangers.
4/9/16 11:13  AM
4/9/16 11:13 AM
Step-up transformer in background, to 125 kV for transmission
4/9/16 11:14  AM
4/9/16 11:14 AM
To get more than their current 15 MW net, should they grow grass under their fans? Probably not.
4/9/16 11:15  AM
4/9/16 11:15 AM
Pump for injecting brine
4/9/16 11:16  AM
4/9/16 11:16 AM
Return piping to injection wells. Patuah has more than 13 miles of piping, designed for 15,000 gallon per minute. Current flow is 9,000 gpm. With low temperatures (300 F), you need lots of fluid.
4/9/16 11:17  AM
4/9/16 11:17 AM
The largest gate valve anyone had ever seen, on the 15,000 gpm brine injection line.
4/9/16 11:19  AM
4/9/16 11:19 AM
Only one of three injection pumps is running.
4/9/16 11:19  AM
4/9/16 11:19 AM
4/9/16 11:20  AM
4/9/16 11:20 AM
Injection pump
4/9/16 11:20  AM
4/9/16 11:20 AM
Injection running at 190 PSI.
4/9/16 01:01  PM
4/9/16 01:01 PM
Prof. Faulds lecture on interaction between Walker Lane and Great Basin faulting
4/9/16 01:58  PM
4/9/16 01:58 PM
Hike up to Hidden Cave