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Rhodes and Conrad M. Willis Langley Research Center Langley Station , Hampton , Va . NASA TN D - 5109 NATIONAL AERONAUTICS AND SPACE ADMINISTRATION . WASHINGTON , D. C. MARCH 1969\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PP1\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PP3","snippet_text":"... \u003cb\u003eCOLUMN\u003c/b\u003e SOLAR - ENERGY CONCENTRATORS By Marvin D. Rhodes and Conrad M. Willis Langley Research Center Langley Station , Hampton , Va . NATIONAL AERONAUTICS AND SPACE ADMINISTRATION For sale by the Clearinghouse for Federal Scientific and\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PP3\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA1","page_number":"1","snippet_text":"... \u003cb\u003eCOLUMN\u003c/b\u003e SOLAR - ENERGY CONCENTRATORS By Marvin D. Rhodes and Conrad M. Willis Langley Research Center SUMMARY Two cone - \u003cb\u003ecolumn\u003c/b\u003e solar - energy concentrators were evaluated in this investigation . Both models had a rim angle of 0.79\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA1\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA2","page_number":"2","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e models . The first test model ( ref . 4 ) was a simplified ver- sion of the cone - \u003cb\u003ecolumn\u003c/b\u003e with a rigidized cone . This model allowed evaluation of the optical concept without becoming involved in the complexities of fabricating\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA2\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA3","page_number":"3","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e solar concentrator as developed in reference 4 is the replacement of a paraboloidal mirror by an equivalent optically folded system con- sisting of cone and \u003cb\u003ecolumn\u003c/b\u003e reflectors . Since the paraboloid and the cone - \u003cb\u003ecolumn\u003c/b\u003e reflec\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA3\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA4","page_number":"4","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e kept the cone in tension and concentric with the \u003cb\u003ecolumn\u003c/b\u003e . A more detailed description of the membrane - cone model is given in reference 5 . APPARATUS AND TESTS The calorimetric evaluation was performed with the concentrator\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA4\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA5","page_number":"5","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e segment 1 ( fig . 1 ( b ) ) . The focal setting for maximum effi- ciency was near the design value ( fa / f = 1.0 ) and showed no systematic variation with aperture size . Concentrator efficiency is relatively insensitive to\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA5\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA6","page_number":"6","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e is atten- uated by three reflection losses , whereas only one reflection loss occurs with the parab- oloid . If a specular reflectance of 0.90 is assumed for the metallic \u003cb\u003ecolumn\u003c/b\u003e of the reinforced - cone model , an average\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA6\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA7","page_number":"7","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e reported in reference 4 indicates that the variation in efficiency with misorientation should be the same as for a paraboloid . Figure 8 com- pares the variation in efficiency with misorientation for the cone - \u003cb\u003ecolumn\u003c/b\u003e and a parab\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA7\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA8","page_number":"8","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e ( 0.673 kg / m2 ) in reference 5 is lower than that estimated for a 9.8 - m - diameter expandable paraboloid ( 1.22 kg / m2 ) in reference 10. On the basis of these estimated specific masses and the calorimetric efficiencies of\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA8\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA9","page_number":"9","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e concentrator was similar to that for a paraboloidal concentrator having comparable geometric efficiency ... \u003cb\u003eColumn\u003c/b\u003e Double Reflector Solar Concentrator . GER 11292 ( Contract NAS 1-3140 ) , Goodyear Aerosp . Corp. , Nov. 1963\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA9\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA10","page_number":"10","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e Cone Virtual image of \u003cb\u003ecolumn\u003c/b\u003e Rim angle e 6 5 4 3 2 Virtual image of \u003cb\u003ecolumn\u003c/b\u003e Figure 1.- Diagrams illustrating the basic concept of a cone - \u003cb\u003ecolumn\u003c/b\u003e concentrator . Aluminized plastic reflective surface 73 cm Typical alinement cable\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA10\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA11","page_number":"11","snippet_text":"... \u003cb\u003eCOLUMN\u003c/b\u003e DIMENSIONS \u003cb\u003eColumn\u003c/b\u003e segment Segment radius , cm Top Base Segment length , Focal length ( nominal ) , cm cm 1 4.13 5.26 23.0 92.0 2 2.82 4.45 11.6 94.5 3 3.73 4.79 5.7 95.2 4.07 5.32 5.8 96.0 1.76 3.15 5.5 99.6 6 1.76 3.79 7.0 101.0\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA11\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA12","page_number":"12","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA12\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA13","page_number":"13","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA13\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA14","page_number":"14","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA14\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA15","page_number":"15","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA15\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA16","page_number":"16","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA16\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA17","page_number":"17","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA17\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA18","page_number":"18","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA18\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA19","page_number":"19","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA19\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA20","page_number":"20","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA20\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA21","page_number":"21","snippet_text":"... \u003cb\u003ecolumn\u003c/b\u003e Aperture ratio 8.16 Paraboloid ( ref . 9 ) 8.34 0 -40 -30 -20 0 -10 Misalinement angle , 脽 , mrad 10 20 30 40 Figure 8.- Comparison of variation in geometric efficiency with misalinement for the reinforced - cone model and a\u0026nbsp;...","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA21\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA22","page_number":"22","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA22\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA23","page_number":"23","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA23\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PA24","page_number":"24","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PA24\u0026dq=%22Column%22+-wikipedia"},{"page_id":"PT6","snippet_text":"","page_url":"https://books.google.com.sg/books?id=P7IxK2tleT0C\u0026pg=PT6\u0026dq=%22Column%22+-wikipedia"}],"search_query_escaped":"\u0026quot;Column\u0026quot; -wikipedia"},{});</script></div></div></div><script>(function() {var href = window.location.href;if (href.indexOf('?') !== -1) {var parameters = href.split('?')[1].split('&');for (var i = 0; i < parameters.length; i++) {var param = parameters[i].split('=');if (param[0] == 'focus') {var elem = document.getElementById(param[1]);if (elem) {elem.focus();}}}}})();</script>