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Parabolic Trough Receiver Heat Loss Testing (Poster)

Description: Parabolic trough receivers, or heat collection elements (HCEs), absorb sunlight focused by the mirrors and transfer that thermal energy to a fluid flowing within them. Thje absorbing tube of these receivers typically operates around 400 C (752 F). HCE manufacturers prevent thermal loss from the absorbing tube to the environment by using sputtered selective Cermet coatings on the absorber and by surrounding the absorber with a glass-enclosed evacuated annulus. This work quantifies the heat loss of the Solel UVAC2 and Schott PTR70 HCEs. At 400 C, the HCEs perform similarly, losing about 400 W/m of HCE length. To put this in perspective, the incident beam radiation on a 5 m mirror aperture is about 4500 W/m, with about 75% of that energy ({approx} 3400 W/m) reaching the absorber surface. Of the 3400 W/m on the absorber, about 3000 W/m is absorbed into the working fluid while 400 W/m is lost to the environment.
Date: March 1, 2007
Creator: Price, H.; Netter, J.; Bingham, C.; Kutscher, C.; Burkholder, F. & Brandemuehl, M.

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems [Poster]

Description: Polymeric encapsulation materials are typically used in concentrating photovoltaic (CPV) modules to protect the cell from the field environment. Because it is physically located adjacent to the cell, the encapsulation is exposed to a high optical flux, often including light in the ultraviolet (UV) and infrared (IR) wavelengths. The durability of encapsulants used in CPV modules is critical to the technology, but is presently not well understood. This work seeks to identify the appropriate material types, field-induced failure mechanisms, and factors of influence (if possible) of polymeric encapsulation. These results will ultimately be weighed against those of future qualification and accelerated life test procedures.
Date: February 1, 2011
Creator: Miller, D. C.; Kempe, M. D.; Araki, K.; Kennedy, C. E. & Kurtz, S. R.

The Modernized Metric System: the International System of Units-SI

Description: Revised wall chart of the seven base units of the modernized metric system, including length, mass, time, electric current, temperature, amount of substance, luminous intensity, and plane angle.
Date: August 1981
Creator: United States. National Bureau of Standards.

Binary Phase Diagrams of Transition Elements

Description: Chart issued by the U.S. National Bureau of Standards illustrating the systematic relationships between phase diagrams of transition elements. This chart includes color illustrations.
Date: May 1980
Creator: Waterstrat, Richard M.

Red Army encircling Balkans.

Description: Black & white newsmap showing the planned paths of the Soviet armed forces through eastern Europe toward Berlin, Germany.
Date: 1944
Creator: O'Donohoe, J.

Newsmap : Army Areas

Description: Front: Map shows 6 army areas in the U.S as of 11 June 1946. "A troop information program map: 11 June 1946." Back: Graphic chart of the organization of the war department.
Date: June 11, 1946
Creator: [United States.] Army Information Branch

Newsmap : The Mediterranean area : a troop information program map

Description: Large map of the Mediterranean area with insets of South Tyrol, Dodecanese Islands, and Venezia Giulia. "Shaded areas indicate disputed territories." Separate, supplemental memorandum gives correction to the boundary line between Greece and Turkey.
Date: 1946
Creator: [United States.] Army Information Branch

Newsmap. For the Armed Forces. V-E Day + 6 weeks, 183rd week of U.S. participation in the war

Description: Front: Text describes Pacific action. Map: Pacific action. Inset maps: Yanks push north on Luzon; Allied troops in New Borneo landings; Japs fall back toward Fr. Indo-China border. Back: Save : don't help delay V-Day! Illustration of fist raised in V for Victory sign with text admonishing no waste of materials.
Date: June 18, 1945
Creator: [United States.] Army Service Forces. Army Information Branch

Newsmap. For the Armed Forces. V-E Day + 5 weeks, 182nd week of U.S. participation in the war

Description: Front: Text describes action in portions of China, Japan, Okinawa and the Philippines. Keyed to map. Map shows Allied and Japanese held areas as of 5 June 1945 in portions of China, French Indo-China, Korea, Thailand, Japan, and the Phillippine Islands. Back: Ribbons representing decorations and awards : wear them correctly! Decorations and awards, and service ribbons are illustrated with detailed instructions and diagrams describing how to wear them correctly.
Date: June 11, 1945
Creator: [United States.] Army Service Forces. Army Information Branch

Newsmap. For the Armed Forces. V-E Day + 4 weeks, 181st week of U.S. participation in the war

Description: Front: Text describes action on Okinawa, in Foochow, Tokyo, Mindanao. Maps: Pacific action flares; Okinawa; Foochow; Tokyo; Mindanao. Relief shown by spot heights and hill shading. Back: Paper bullets. Text describes propaganda leaflets as part of psychological warfare. Illustrations and text detail German and Jap Safe-Conduct Surrender Pass instructions.
Date: June 4, 1945
Creator: [United States.] Army Service Forces. Army Information Branch

Newsmap : The Middle East

Description: Maps shows Middle East. "A troop information program map." Relief shown by hachures. Table lists countries, capitals, area in sq. miles, and population. Map key indicates oil fields, oil pipe lines, principal railways, principal roads.
Date: 1946
Creator: [United States.] Army Information Branch

Newsmap : Wherever you are..

Description: Large globe connected by lines to four smaller globes, a manual and a soldier instruct enlisted men and women on how to enroll in grade school, high school or college level courses through the USAFI.
Date: 1946
Creator: [United States.] Army Information Branch

Newsmap : Farm loans

Description: Text describes how the amended GI Bill supports farm loans. Includes 6 photographs.
Date: 1946
Creator: [United States.] Army Information Branch

Newsmap. For the Armed Forces. 297th week of the war, 179th week of U.S. participation

Description: Front: Text keyed to map of Asia describes military action in Japan, Okinawa, China, The Philippines, and Borneo. Inset: View of the world from the north pole. Back: Two Down . . . One to go! Illustration of two soldiers in hand-to-hand combat is accompanied by text regarding the war with Japan.
Date: May 21, 1945
Creator: [United States.] Army Service Forces. Army Information Branch

Newsmap : Job security

Description: Text describes how the amended GI Bill of Rights helps veterans. Includes 2 photographs.
Date: 1946
Creator: [United States.] Army Information Branch

Newsmap for the Armed Forces : going to school under the amended GI Bill of Rights

Description: Front: Text describes: Education and job training for you -- Who is eligible? -- What kind of training can you get? -- How much training can you get? -- Who pays for your education? -- How do you apply for these benefits? Includes 3 photographs. Back: Memorandum to all officers and EM from Harry Truman, The White House, Washington, August 20, 1945.
Date: March 18, 1946
Creator: [United States.] Army Information Branch