analysis of whether parabolic-trough collec- tors would be cost effective for any situation based on minimum data. (See Federal Program Contacts on page 20.) This FTA describes the technology of parabolic-trough collectors, solar water- heating systems, and absorption cooling. It points out the types of situations where parabolic-trough solar water heating is most likely to be cost effective and describes the ESPC process available to Federal facilities for parabolic-trough projects. In addition, sidebars provide indicators that a system will be effective, tips for ensuring successful operation, and sources for determining sys- tem data.
Case studies for a 10-year-old system at a county jail and for one just start- ing construction at a Federal prison include economic evaluation data. 2