Abstract: . . .  procurement of the system. Further thanks go to Anne Crawley and Dr. Andy Walker of the US Department of Energy, Federal Energy Management Program and for supporting NREL staff with the feasibility study, procurement specifications and design review.  . . .
. . .  evacuated tube, and active digital controls for successful operation and protection from freezing and overheating are all essential elements. Project participants are pleased with the relative ease of implementing this type of system and its total costs. The cost analysis shows that 37% of total project costs are logistic expenses. Only 33% of total cost goes towards . . .
. . .  inserted to the manifolds. At this stage, the controller will be switched to automatic operation. The modularity and installation simplicity of Thermomax tubes minimizes the installation costs. The most difficult and time-consuming part of an installation typically is positioning of ballast blocks. The authors would like to thank Robert Billak (retired) of the Pentagon . . .
. . .  and secured into the compression clamp copper chamber in super insulated header. 5. SUMMARY This paper identifies cost elements of direct solar water heating systems and simplicity of solar water heating installation on commercial buildings with a hot water circulation loop. These systems rely on several key design features. The diode function of heat-pipe, the superior . . .
. . .  shown in Figure 4 and are thus subject to material markets fluctuation. But raw materials are not the major cost contributor of the finished product. The microprocessor based solar thermal controllers are sophisticated yet easy to operate. They display the status of solar system on their own LCD or on the screen of a computer. The principle is simple; they measure . . .
. . .  relative ease of implementing this type of system and its total costs. The cost analysis shows that 37% of total project costs are logistic expenses. Only 33% of total cost goes towards collector and system instrumentation with 14% for installation and 5 % for the balance of the system. 6. ACKNOWLEDGEMENTS Figure 13: Installation costs are 14% of the total vacuum tube . . .
--2180,6,182,2508,10902