Design of the support structure, drive pedestal, and controls for a solar concentrator Page: 99 of 124
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increases is factored into these estimates. A four-man
installation crew is assumed , with $250/man travel cost per site,
and $100.00 per man/day per diem and ground transportation.
Support structure installation is estimated to require 6 days.
Control system installation is based on a 95% Wright Learning
Curve. Installation labor rates are factory labor rates plus 20%.
7. No costs are included for foundation and site wiring (as differ-
entiated from collector wiring), since they are site specific.
Also, no costs are included for a central computer, estimated at
$1,200.00, with a capacity of up to 200 collectors at each
installation site.
8. All costs are 1991 dollars, with no provision for Inflation.
9. Tax (both income and sales/use) implications are ignored.
To summarize, it was assumed for all cases that only one collector
would be installed on each site, with subcontractor activities and
materials procurement supervised and coordinated by a general
contractor/system owner. All costs included are those external to
the general contractor/system owner; i.e., no general contractor’s
indirect cost recovery or management fee are factored into the
totals. For the most part, the costs Included are per vendor quotes
or budgetary estimates for the various quantities required. Learn-
ing curve estimates (Wright Curve) were utilized in calculating labor
hours for the support structure fabrication (93%) and control system
installation (95%). The support structure estimate began with a
subcontractor estimate for an order quantity of 50 units as the
baseline, while the control system installation used the vendor's
estimate for one unit.
The results of the cost analysis are considered to be conservative,
due to several factors:
91
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Goldberg, V.R.; Ford, J.L. & Anderson, A.E. (WG Associates, Dallas, TX (United States)). Design of the support structure, drive pedestal, and controls for a solar concentrator, report, August 1, 1991; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1068820/m1/99/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.