Document Njego5r0vejx75556ndw6nkD

Insulation Screens Kaiser Aluminum & Chemical Sales, Inc. General Sales Office, Palmolive Building, Chicago 11, Illinois Executive Office, Kmseb Building, Oakland 12, Califobnia KAISER ALUMINUM SHADE SCREENING* * Patented Kaiser Aluminum Shade Screening is scientifically designed to keep interiors cool by blocking hot aim rays. Shade Screening is being widely used in con junction with- air conditioning systems to reduce the solar load--thus permitting more economical operation by reducing the work load. The effect of using Kaiser Aluminum Shade Screening is shown on these graphs prepared by Kaiser Aluminum engineers following a test procedure similar to that used at the ASHAE Laboratory (1, 2) during experimental work on the shading of sunlit glass. The accompanying charts illustrate the amount of instantaneous heat gain to a room both through unshaded windows and windows protected with Kaiser Shade Screening. Kaiser Aluminum Shade Screening has 17.5 louvers per inch permanently tilted at a downward angle. This stops sun rays before they hit the window glass. With sun angle (apparent) at 37 deg 100 per cent of sun rays are blocked. At 30 deg, 85 per cent. At 25 deg, 75 per cent. At 15 deg, 55 per cent. At 0 deg, 30 per cent. Thus Shade Screening can reduce the amount of instantaneous heat gain through unshaded windows by as much as 78 per cent, while still providing in sect protection. TYPICAL CALCULATIONS OF COOLING LOAD REDUCTIONS DURING PERIOD OF EXTREME MIDSUM MER SOLAR RADIATION AT 40" N. LATI TUDE. Shade Screening reduces the load on air-condition ing unite . . . permite use of smaller units. These typical calculations show how this is possible: FIGURING 24 WINDOWS ON THE EAST SIDE Total area ZW x 6' x 24 = 504 Sq, Ft. Use 10:00 A.M. peak load Instantaneous Heat Gain through Unshaded Windows BTU/HR 504 Sq. Ft. x 138 BTU/HR per Sq. Ft.......... 69,500 Instantaneous Heat Gain through Windows chpAAfl by Kaiser Aluminum Shade Screen 504 Sq. Ft. x 35 BTU/HR per Sq. Ft....... 17,650 Quantity of Heat Gain Blocked by Shade Screen............................... ........................ 51,850 Heat Blocked = 4.31 tons* of refrigeration FIGURING 11 SOUTH WINDOWS 3*6' x 6' FIGURING 23 WEST WINDOWS ZH'x 6' Total ares 3*V x 6' x 23 = 483 Sq. Ft. BTU/HR Use 4:00 P.M. peak load Instantaneous Heat Gain Unshaded Win dows....................................................... 111,000 Tnflte*AmnnB Heat Gain through Windows shaded by Kaiser Aluminum Shade Screen...................................................... 34,800 Quantity of heat blocked by Kaiser Alumi num Shade Screen.................................. 76.200 Heat Blocked =* 6.35 tons* of refrigeration Tote! Area = 3W x 6' x 11 = 231 Sq. Ft. Use 12:00 noon peak load BTU/HR Instantaneous Heat Gain Unshaded Win dows......................... 26,800 Instantaneous Heat Gain through Windows shaded by Kaiser Aluminum Shade Screen......................................................... 8.550 Quantity of heat blocked by Kaiser Aluminum Shade Screen.................................... 18,250 Heat Blocked = 1.52 tons* of refrigeration 1 ton of refrigeration * 12,000 BTU/HR 1684 Kaiser Aluminum & Chemical Sales9 Inc Insulation Screens KAISER ALUMINUM SHADE SCREENING The instantaneous heat gain measure ments included transmitted direct solar radiation plus the absorbed heat gained by convection and re-radiation plus transmission of heat through the glass caused by inside-outside temperature differentials. Kaiser Aluminum Shade Screening reflects more heat than other commonly used materials thus the screening itself remains cool and emits at a very low rate. These factors of high reflectivity and low emissivity combine with the sun blocking feature of Shade Screening to produce cooler interior temperatures. ------------- Total Solar Load -- --Instantaneous heat gain through unshaded windows. Instantaneous heat gain through windows protected by Kaiser Aluminum Shade Screening. .............. % of heat blocked. 7 ""J JTn-. -,*T - H www " - TfF . . r* *, X .*- V '-<iutiUiKKmn wfurr cuis-iatu censi iftiT. V; V- *** V. 's* tr V-' p- k & C-IS 8r` 3. US *25- 5* & m Vii>- fit is- 9 i3* ir m m f*C **n -~T ^g 'IS V. ssr k\ r;\ 2L SI A -- :-- s* 5 . x-- > 'Tr> - -- V * 10*. n KOON- ,, ~T 11 1 1 1 WHrwooow IT. W*. 4*. 4* 4T1L Ul oua mown II' an cuts-KUO ownISO ,, /. & f in A \ \ 1 K N ' v\\ -- * * T * 19 11 NOON 1 2 9.4. 9 i 7 toomwwaew NUL a nranm - ota*uncw,ion jisoih Kii atmur cLUMatn conn 2^ V i. ... . 1 V > Ks' p-. ** r I 5to hoon i * * 4 i t--7 1. ASHVE Research Report, "The Shading of Sunlit Glass--An analysis of the effect of Uniformly Spaced Flat Opaque Slats," by G. V. Parmelee and W. W. Aubele, June 1952. 2. ASHVE Research Report, "The Shading of Sunlit Glass--An Experi mental Study of Slat-Type Sun Shades," by G. V. Parmelee, W. W. Aubele, and D. J. Veld, October 1952. 1685