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4 white venetian blind slat angle 30 deg white

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Unformatted text preview: rape 0.2 grey roller blind black venetian blind slat angle = 60 deg. 0 0 0.2 0.4 0.6 0.8 Solar Transmission (measured NSTF) 1 1 CDG SHGC SHGC (ASHWAT calculated) ASHWAT versus Measurment beige drape 0.8 insect screen outdoor side white venetian blind fully open ± 0.05 grey roller blind 0.6 black venetian blind slat angle = 60 deg. white venetian blind closed 0.4 white venetian blind slat angle = 30 deg. white venetian blind slat angle 60 deg. 0.2 0 0 0.2 0.4 0.6 SHGC (measured NSTF) 0.8 1 1 white venetian blind – fully open IAC grey roller blind ASHWAT versus Measurment IAC (ASHWAT calculated) 0.8 beige drape insect screen outdoor side white venetian blind closed 0.6 0.4 white venetian blind slat angle = 30 deg. white venetian blind slat angle = 60 deg. 0.2 black venetian blind slat angle = 60 deg. ± 0.05 0 0 0.2 0.4 0.6 IAC (measured NSTF) 0.8 1 Sheer/Venetian Blind (total solar transmission versus profile angle) Glazing/Shading Code in Building Simulation EnergyPlus ESPr + GSLedit (venetian blinds, drapes, roller blinds, insect screens) ASHRAE Toolkit (HBX) California Simulation Engine (CSE) and in development HOT3000 more EnergyPlus capabilities Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading North House (Solar Decathlon) Loads Heating No shading Automated outdoor louvers (control for passive heating and cooling) Cooling Cooling Shade position (horizontal med. slats, CDG) Slat control example (close slats at noon) Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading High Solar Transmission Glazing High Solar Transmission Glazing Good Solar Control Low Solar Transmission Glazing Low Solar Transmission Glazing Poor Solar Control Low Solar Transmission Glazing Poor Solar Control and high fraction convection Outdoor Shading Good Solar Control – any glazing system type and low fraction convection Miscellaneous Notes Effect of shading attachments on Ufactor is generally small Examine the 2009 HOF Fenestration chapter IAC tables Look at the North House simulation plots The wisdom of outdoor shading especially with more modern glazing systems Consider active shading control especially slattype shading Summary Significant progress in recent research IAC results can be found in the 2009 HOF Shading models have already been added to several building simulation programs More programs are being upgraded Consider active shading control – especially outdoor, slattype shading Consider triple glazing Look for (and ask for) improved software capability Fenestration and Shading Devices in the Context of Building Energy Simulation Questions ? Si+1 Si Si1 qi qi1 Jf,i … S3 S2 S1 Jb,i Jb,i+1 Jf,i1 Ti ε f ,i ε b ,i τi i … Building Energy Performance – Spring 2012 - Topic 12 - Introduction to HVAC Systems & Equipment The main purposes of an HVAC system may be thought of as: • Compensating for the net energy losses and gains from/to spaces in a building in order to maintain thermal comfort. (Accomplished by heating, cooling, humidifying, dehumidifying.) • Compensating for “air pollutant generation” in a building to maintain acceptable indoor air quality. (Accomplished by air filtration, ventilation, and exhaust.) HVAC Designers often refer to certain industry standards as guidelines for determining acceptable conditions for thermal comfort and indoor air quality. For example: ASHRAE Standard 55 Defines range of conditions (temperature & humidity) that most people will find to be comfortable. ASHRAE Standard 62 Defines outdoor air ventilation rates that are expected to provide indoor air quality acceptable to most people under normal circumstances. Figure adapted from ASHRAE...
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This note was uploaded on 10/04/2012 for the course ME 760 taught by Professor Davidmather during the Spring '12 term at Waterloo.

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