UFC 3-440-01
14 June 2002
APPENDIX D
EXAMPLE DESIGN CHECKLIST
D-1. FEASIBILITY STUDY. This design checklist provides the solar system designer,
project manager, and quality assurance personnel with a guide to evaluate the
feasibility of solar system designs.
a. General Information
(1)
Site location.
(2)
Estimated daily load.
(3)
Back-up fuel type.
(4)
Fuel Costs for Project Location (i.e., electricity, natural gas, etc.).
b. Feasibility Study Results
(1) Is the life cycle cost savings positive for any of the systems? If "yes",
proceed with the design. If "no", stop here.
(2)
Which service water heating system has the highest LCC savings?
(3)
Discounted payback.
(4) Calculated array area for above system. If array area is larger than
3000 square feet, two or more separate systems should be considered.
(5)
Geographic latitude of project location.
D-2.
SYSTEM SELECTION, PLANNING, AND COORDINATION
a. System Selection: Closed-loop or direct circulation
(1)
Is load size greater than 120 gals (454 L) per day?
(2)
Does the project location experience freezing temperatures?
(3)
Are there more than 4000 heating degree days at the project location?
(4)
Will system be closed-loop or direct circulation?
(a) If closed-loop, will system use 30 percent or 50 percent propylene-
glycol?
(b) If direct circulation, what is the Ryznar Index (RI) of the water to be
used in the system?
D-1
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