BUILDING ENERGY - Fall 2016

BUILDING ENERGY - Fall 2016 - 35 FIGURE 2: EXAMPLE OF RAINSCREEN STUDY SHOWING INTENDED DETAIL AND R-VALUE, AS WELL AS THE R-VALUE OBSERVED FROM A THERMAL IMAGE AND THROUGH THE HEAT-FLOW SIMULATION. FIGURE 3: THREE THERM SIMULATIONS FOR DISCONTINUOUS THERMAL BRIDGES (RIP-8.5). Because these simplified, singledimension calculations do not account for any thermal bridging, they were used as the "baseline R-value" as the best-case scenario. A thermal imaging camera was used to determine the actual R-value of existing façades. Teams were deployed to 15 buildings to assess the general envelope thermal performance and scan for areas that appeared to perform differently. Using the methodology published by Madding (2008), the exterior air temperature, interior air temperature and the radiant temperature were gathered using infrared imaging and temperature data loggers in order to calculate the as-built R-value of the assembly (see figure 2). Because physically altering the built conditions was not possible, computer simulations were used to test possible improvements to various construction details. Lawrence Berkeley National Laboratory's THERM 7.3 program was employed to determine R-values of complete assemblies, including thermal bridges, based upon its ease of use and ability to integrate into the design process. For each detail, models were prepared of the constructed designs and were then calibrated by comparing them to the actual performance measured in the field with the thermal imaging camera. For discontinuous thermal bridges, such as bolts or clips, two methods were used to account for their three-dimensional impact: the parallel path method and the isothermal planes method. The parallel path method takes a weighted average of two simulations, one with the discontinuous bridging element and one without it. The isothermal planes method runs one simulation using a weighted conductivity of the bridging material and insulation for the discontinuous thermal element. Because the parallel path tends to overestimate the impact of the thermal bridging, and the isothermal planes tends to underestimate the impact, both methods were used to understand the range of impact the thermal bridge might have (see figure 3). CONTINUED ON PAGE 37 NESEA.ORG * 35 http://www.NESEA.ORGTable of Contents for the Digital Edition of BUILDING ENERGY - Fall 2016From the Executive Director and Board ChairNew York City is Transforming Buildings for a Low Carbon FutureDoes Electric Grid 2.0 Mean Energy Democracy?Resiliency for Affordable Multifamily Housing: What We Have Learned and What We Still Need to KnowBreak It or Lose It: Thermal Bridging in Rainscreen SystemsMy PEI is Better Than Your PEILife Cycle Assessment at the Speed of DesignFrom Theory to Reality: Our Journey Toward Sustainability Building a Net Zero HomeSolar Policy in the Northeast: What’s New, What’s Next?BuildingEnergy Green PagesIndex to Advertisers / Ad.comBUILDING ENERGY - Fall 2016 - cover1BUILDING ENERGY - Fall 2016 - cover2BUILDING ENERGY - Fall 2016 - 3BUILDING ENERGY - Fall 2016 - 4BUILDING ENERGY - Fall 2016 - 5BUILDING ENERGY - Fall 2016 - From the Executive Director and Board ChairBUILDING ENERGY - Fall 2016 - 7BUILDING ENERGY - Fall 2016 - 8BUILDING ENERGY - Fall 2016 - 9BUILDING ENERGY - Fall 2016 - New York City is Transforming Buildings for a Low Carbon FutureBUILDING ENERGY - Fall 2016 - 11BUILDING ENERGY - Fall 2016 - 12BUILDING ENERGY - Fall 2016 - 13BUILDING ENERGY - Fall 2016 - 14BUILDING ENERGY - Fall 2016 - 15BUILDING ENERGY - Fall 2016 - 16BUILDING ENERGY - Fall 2016 - 17BUILDING ENERGY - Fall 2016 - 18BUILDING ENERGY - Fall 2016 - 19BUILDING ENERGY - Fall 2016 - Does Electric Grid 2.0 Mean Energy Democracy?BUILDING ENERGY - Fall 2016 - 21BUILDING ENERGY - Fall 2016 - 22BUILDING ENERGY - Fall 2016 - 23BUILDING ENERGY - Fall 2016 - 24BUILDING ENERGY - Fall 2016 - 25BUILDING ENERGY - Fall 2016 - Resiliency for Affordable Multifamily Housing: What We Have Learned and What We Still Need to KnowBUILDING ENERGY - Fall 2016 - 27BUILDING ENERGY - Fall 2016 - 28BUILDING ENERGY - Fall 2016 - 29BUILDING ENERGY - Fall 2016 - 30BUILDING ENERGY - Fall 2016 - 31BUILDING ENERGY - Fall 2016 - 32BUILDING ENERGY - Fall 2016 - 33BUILDING ENERGY - Fall 2016 - Break It or Lose It: Thermal Bridging in Rainscreen SystemsBUILDING ENERGY - Fall 2016 - 35BUILDING ENERGY - Fall 2016 - 36BUILDING ENERGY - Fall 2016 - 37BUILDING ENERGY - Fall 2016 - 38BUILDING ENERGY - Fall 2016 - 39BUILDING ENERGY - Fall 2016 - My PEI is Better Than Your PEIBUILDING ENERGY - Fall 2016 - 41BUILDING ENERGY - Fall 2016 - 42BUILDING ENERGY - Fall 2016 - 43BUILDING ENERGY - Fall 2016 - Life Cycle Assessment at the Speed of DesignBUILDING ENERGY - Fall 2016 - 45BUILDING ENERGY - Fall 2016 - 46BUILDING ENERGY - Fall 2016 - 47BUILDING ENERGY - Fall 2016 - From Theory to Reality: Our Journey Toward Sustainability Building a Net Zero HomeBUILDING ENERGY - Fall 2016 - 49BUILDING ENERGY - Fall 2016 - 50BUILDING ENERGY - Fall 2016 - Solar Policy in the Northeast: What’s New, What’s Next?BUILDING ENERGY - Fall 2016 - 52BUILDING ENERGY - Fall 2016 - 53BUILDING ENERGY - Fall 2016 - BuildingEnergy Green PagesBUILDING ENERGY - Fall 2016 - 55BUILDING ENERGY - Fall 2016 - 56BUILDING ENERGY - Fall 2016 - 57BUILDING ENERGY - Fall 2016 - 58BUILDING ENERGY - Fall 2016 - 59BUILDING ENERGY - Fall 2016 - 60BUILDING ENERGY - Fall 2016 - 61BUILDING ENERGY - Fall 2016 - 62BUILDING ENERGY - Fall 2016 - 63BUILDING ENERGY - Fall 2016 - 64BUILDING ENERGY - Fall 2016 - 65BUILDING ENERGY - Fall 2016 - 66BUILDING ENERGY - Fall 2016 - 67BUILDING ENERGY - Fall 2016 - 68BUILDING ENERGY - Fall 2016 - 69BUILDING ENERGY - Fall 2016 - 70BUILDING ENERGY - Fall 2016 - 71BUILDING ENERGY - Fall 2016 - 72BUILDING ENERGY - Fall 2016 - 73BUILDING ENERGY - Fall 2016 - 74BUILDING ENERGY - Fall 2016 - 75BUILDING ENERGY - Fall 2016 - 76BUILDING ENERGY - Fall 2016 - 77BUILDING ENERGY - Fall 2016 - 78BUILDING ENERGY - Fall 2016 - 79BUILDING ENERGY - Fall 2016 - 80BUILDING ENERGY - Fall 2016 - Index to Advertisers / Ad.comBUILDING ENERGY - Fall 2016 - 82BUILDING ENERGY - Fall 2016 - cover3BUILDING ENERGY - Fall 2016 - cover4http://www.nxtbook.com/naylor/ENEB/ENEB0118http://www.nxtbook.com/naylor/ENEB/ENEB0217http://www.nxtbook.com/naylor/ENEB/ENEB0117http://www.nxtbook.com/naylor/ENEB/ENEB0216http://www.nxtbook.com/naylor/ENEB/ENEB0116http://www.nxtbook.com/naylor/ENEB/ENEB0215http://www.nxtbookMEDIA.com

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