1431 eff tf cryo needs to be an input but keeping the existing default values

[jmorris-uk]

Description

Adds correct outputting of the cryoplant efficiency from issue #1431

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 30.26%. Comparing base (d3135bd) to head (32465d1).
Report is 22 commits behind head on main.

Files with missing lines	Patch %	Lines
process/power.py	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3492      +/-   ##
==========================================
- Coverage   30.27%   30.26%   -0.01%     
==========================================
  Files          80       80              
  Lines       19501    19506       +5     
==========================================
  Hits         5903     5903              
- Misses      13598    13603       +5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jonmaddock]

All fine, just a comment to clarify please.

[jonmaddock]

Could you comment on the significance of this if?