California Valley Solar Ranch Update
As a follow-up to my prior article on this subject, an update an re-write appeared on MasterResource.org.
CLARIFICATION & CORRECTION
In the commentary on MasterResource.org it was pointed out that my assertion of a 1 acre 250 MW combined cycle gas turbine (CCGT) facility was overly optimistic.
I had previously seen layouts of larger 400-600 MW CCGT facilities which indicated the generation plant could be situated on an area slightly larger than 6000 square meters (1.5 acres). I had assumed an approximate 1.0 acre size for a 250 MW plant by extrapolating down.
Prompted by the comment on MasterResource.org I have researched this a bit more; and I find that I was, in fact, overly optimistic and incorrect that a 250 MW CCGT facility could be placed on only 1 acre. I was only considering the main power generation facility itself, and not considering other required elements such as the operations building, cooling towers, fuel storage, etc.
Based on a layout of a typical 400 MW Power Plant SCC5-4000F 1SCCGT from Siemens, it is more likely that a complete 250 MW CCGT facility would require slightly less than 10 acres.
Despite this correction, however, I think that my point regarding the relative sizes of the CVSR facility and a comparable CCGT facility is still quite valid. The CCGT facility is vastly more compact and provides far better conservation of space. I have attached a facility size comparison which illustrates this with a scaled overlay of a comparable CCGT plant on top of the CVSR facility.
- US Taxpayer Backed California Valley Solar Ranch Now at Full Power (jerrygraf.wordpress.com)
- A Typical Clean Energy Boondoggle (coyoteblog.com)