Fervo Cape Station 500 MWe Update + 50 MWe SAM Example #74

softwareengineerprogrammer · 2025-05-21T18:02:25Z

Description

Fervo 500 MWe Update

Addresses NREL#385

Capacity increase achieved by:

Increasing flow rate to 107 kg/s per production well
Increasing number of doublets to 54

Input Assumptions

Screenshot of Fervo_Project_Cape-4.md which is added to Reference manual:

Results Comparison with References & Requirements

Screenshot of Fervo_Project_Cape-4.md:

TODO

Is Reservoir impedance = 0.001 GPa.s/m³ appropriate? (Assuming yes since it's the value we used for the 400 MWe case)
Per Fervo's announcement of "optimizing well spacing using fiber optic sensing", we should probably update Well Separation, whose current value is 365 feet. I don't know what an appropriate value would be here. (Note: the case is not sensitive to the Well Separation parameter so this value is currently just for display - arguably we should maybe even remove it.)

50 MWe SAM Example

Pivots SAM example (example_SAM-single-owner-PPA) from Fervo 400 MWe to 50 MWe to avoid redundancy/confusion with existing Fervo 400 MWe BICYCLE example (Fervo_Project_Cape-3) and Fervo 500 MWe SAM case study (Fervo_Project_Cape-4)

https://gtp.scientificwebservices.com/geophires/?geophires-example-id=example_SAM-single-owner-PPA

Testing & Verification

Fervo 500 MWe Update

https://gtp.scientificwebservices.com/geophires/?shared-geophires-result-id=466f43fc-7728-469c-a115-7612c9935e04

…justment factor

…erm_tenor is being set to project lifetime by EconomicsSam). Sync .sam project file (new SAM version: 2025.4.16).

…ly occurs once, min net > 500 MWe.

…ect IRR' as unlevered IRR (see https://www.efinancialmodels.com/knowledge-base/financial-metrics/internal-rate-of-revenue-irr/irr-levered-an-internal-rate-of-return-example/)

…to 50 MWe loosely based on Fervo 500 MWe

…d to have for posterity and as a testing guardrail

…b interface issue with incorrectly interpreting commas in comment lines as comment delineators

… to distinguish from BICYCLE model's substraction of ITC from 'Total capital costs'.

…mparisons with references

…-4.txt

…roject_Cape-4)

…bly display capex for all econ models but decided to limit scope for now)

…splay ceiling instead of decimal in 480614e

…note

…93af)

…date to NREL link once merged into main repo)

softwareengineerprogrammer added 14 commits May 21, 2025 11:01

WIP - Fervo_Project_Cape-4 example. TODO drawdown

5132e66

Drawdown WIP

013a57c

drawdown tuned for Minimum Net Electricity Generation = 500.16 MW

24b232a

No ITC, capacity-based surface plant cost instead of surface plant ad…

11c4749

…justment factor

WIP stash - handle SAM-EM NaN

a29a047

Clarify fraction of investment in bonds = debt in tooltip text

5ce09cf

PySAM JSON default term_tenor sync (does not affect results because t…

a6713db

…erm_tenor is being set to project lifetime by EconomicsSam). Sync .sam project file (new SAM version: 2025.4.16).

Re-enable ITC for now. Tune doublets/drawdown such that redrilling on…

f4f42f9

…ly occurs once, min net > 500 MWe.

Workaround for float('nan') != float('nan')

412bcb0

Debt:equity 20:80

a053c49

TODO to cite exploration cost

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Exploration cost documentation

7cd6918

Output SAM IRR as 'After-Tax IRR' to avoid potential mixup with 'Proj…

193b5d3

…ect IRR' as unlevered IRR (see https://www.efinancialmodels.com/knowledge-base/financial-metrics/internal-rate-of-revenue-irr/irr-levered-an-internal-rate-of-return-example/)

Bump version: 3.9.8 → 3.9.9

01158b6

softwareengineerprogrammer mentioned this pull request May 21, 2025

Fervo cape station 500 MWe #73

Closed

9 tasks

softwareengineerprogrammer added 2 commits May 21, 2025 11:11

After-Tax IRR result field

6a3c06e

Bump version: 3.9.9 → 3.9.10

163131d

softwareengineerprogrammer mentioned this pull request May 21, 2025

Fervo Cape Station 500 MWe update NREL/GEOPHIRES-X#385

Closed

2 tasks

softwareengineerprogrammer added 2 commits May 21, 2025 13:03

Pivot SAM example from attempt to compare with Fervo 400 MWe BICYCLE …

7967646

…to 50 MWe loosely based on Fervo 500 MWe

SAM example description + minor input parameter tweaks

8b5ae19

softwareengineerprogrammer changed the title ~~Fervo Cape Station 500 MWe Update~~ Fervo Cape Station 500 MWe Update + 50 MWe SAM Example May 21, 2025

softwareengineerprogrammer added 9 commits May 22, 2025 07:12

Add original SAM example back as example_SAM-single-owner-PPA-2 - goo…

ec8c1e8

…d to have for posterity and as a testing guardrail

Stimulation costs tooltip text

2d195af

Fix Reservoir Impedance tooltip whitespace

dcbfc33

SAM example 2 README entry

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Link to SAM-EM docs from README description of economic models

ed7bb6e

SAM example descriptions - clarify BICYCLE comparison context

5e68ad0

fix description typo

9f3c303

use full-width commas in SAM example description as workaround for we…

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…b interface issue with incorrectly interpreting commas in comment lines as comment delineators

'Using SAM Economic Models with Existing GEOPHIRES Inputs' documentation

994a6da

softwareengineerprogrammer added 27 commits May 27, 2025 10:16

Output SAM-EM capex as 'Total CAPEX' instead of 'Total capital costs'…

e6030a7

… to distinguish from BICYCLE model's substraction of ITC from 'Total capital costs'.

Bump version: 3.9.11 → 3.9.12

3369acf

Inflation Rate, .023, -- US inflation as of April 2025

f1c928b

lower flow rate to 115 kg/s. Adjust discount rate & inflation rate

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Set water loss fraction = 15%

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Fervo_Project_Cape-4.md - documenting input assumptions and result co…

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…mparisons with references

More work on Fervo_Project_Cape-4.md, citations in Fervo_Project_Cape…

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…-4.txt

Document ATB PPA reference, typical levered returns

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Document stimulation cost is per injection well

bb86058

Set flow rate to 107 kg/s per max rate achieved in test

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Switch to RES_VOL_FRAC_SEP for realistic fracture size/count

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Switch example_SAM-single-owner-PPA to RES_VOL_FRAC_SEP (like Fervo_P…

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…roject_Cape-4)

description, comment tweaks

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Incorporate Fervo_Project_Cape-4 into documentation

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Display fracture count rounded up to nearest whole number

480614e

Include CAPEX in SUMMARY OF RESULTS for SAM econ models. (Could possi…

bea93af

…bly display capex for all econ models but decided to limit scope for now)

update example2 - calculated fracture output affected by change to di…

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…splay ceiling instead of decimal in 480614e

Parse reservoir volume calculation note in GeophiresXResult

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update csv test affected by addition of Reservoir volume calculation …

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…note

Parse Total CAPEX in result summary (introduced into case file in bea…

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…93af)

Unit test Total CAPEX in SAM-EM result summary

c5fb5f2

Bump version: 3.9.12 → 3.9.13

bec539f

Update drilling cost to <M/well per Tim Latimer on Volts podcast

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Approach & Methodology, additional inputs/results documentation

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Citation for /kW surface plant cost

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Max total electricity generation result note re: modularity

a2cb51b

Link to Fervo_Project_Cape-4 documentation in description (TODO to up…

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…date to NREL link once merged into main repo)

softwareengineerprogrammer merged commit cbdc94b into main May 30, 2025
24 checks passed

softwareengineerprogrammer mentioned this pull request May 30, 2025

Fervo Cape Station 500 MWe Update + 50 MWe SAM Example [v3.9.16] NREL/GEOPHIRES-X#389

Merged

3 tasks

softwareengineerprogrammer deleted the fervo-cape-station-500-mwe-2 branch June 18, 2025 20:45

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Fervo Cape Station 500 MWe Update + 50 MWe SAM Example #74

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Description

Fervo 500 MWe Update

Input Assumptions

Results Comparison with References & Requirements

TODO

50 MWe SAM Example

Testing & Verification

Fervo 500 MWe Update

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softwareengineerprogrammer commented May 21, 2025 •

edited

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