Tag Archives: Energy

Clarifying Energy Simulation Aided Design: A Look at ASHRAE Standard 209

Green Building

Clarifying Energy Simulation Aided Design: A Look at ASHRAE Standard 209

Originally published on September 5, 2018 by BNP Media through the Building Enclosure Blog. ANSI/ASHRAE Standard 209-2018, Energy Simulation Aided Design for Buildings Except Low-Rise Residential Buildings is the product of a half-decade of inertia within the building design and construction community toward leveraging energy modeling a design tool through a project. Standard 209 outlines the minimum requirements for providing energy design assistance using building energy simulation and analysis. To this end, the standard defines a range of minimum criteria from energy modeling requirements,….

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How to Make Building Energy Models More Accurate

Green Building

How to Make Building Energy Models More Accurate

Originally published on August 13, 2018 by BNP Media through the Building Enclosure Blog.   I’m asked regularly about the discrepancies between modeled and measured building performance. At first blush, one might suspect that the building energy model (BEM) itself contains bad information. That notion could very well be correct! BEM inputs require a certain level of synthesis, interpretation, and assumption. But there are many other reasons why the BEM results may vary significantly from measured performance outcomes on a completed project. In basic terms: Actual weather in….

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Dry-Bulb Temperature, Wet-Bulb Temperature and Enthalpy

Green Building

Dry-Bulb Temperature, Wet-Bulb Temperature and Enthalpy

Originally published on May 9, 2018 by BNP Media through the Building Enclosure Blog. There is energy in the air all around us. Some of it exists in the form of thermal energy that one can sense – heat in air that impacts one’s perception of thermal comfort. But there is also an energy embodied in the vapor present in the air. While this “hidden” heat is not experienced as warmth, it certainly has a bearing on thermal comfort as….

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Defining Humidity Ratio and Relative Humidity

Green Building

Defining Humidity Ratio and Relative Humidity

Originally published on April 4, 2018 by BNP Media through the Building Enclosure Blog. How does a hot-air balloon rise? Fire up the burner and the temperature of the air captured within the balloon increased. The molecules of the air take on the thermal energy and become more excited. The excited molecules create more space between them. As a result, the air expands as its temperature increases. Thus, one pound of air at 80-degrees Fahrenheit (°F) is a larger volume than….

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Thermal Dynamics: Visualizing Sensible Versus Latent Heat

Green Building

Thermal Dynamics: Visualizing Sensible Versus Latent Heat

Originally published on March 12, 2018 by BNP Media through the Building Enclosure Blog. It’s the first law of thermodynamics. The Law of Conservation of Energy states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. This is the foundation of phase change in the physical environment. Molecular activity requires energy. The activity does not just magically happen. Phase Change When a material changes its state or phase (e.g., going….

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Five Diagrams Every Design Team Should Know

Green Building

Five Diagrams Every Design Team Should Know

Originally published on February 7, 2018 by BNP Media through the Building Enclosure Blog. They might be considered cliché; however, they might also be very true. The following are five diagrams that frequently work their way into slide decks about green building design and construction. You should be familiar with all of these. Let’s unpack each one briefly – going back to primary source material and acknowledging attribution. Read more…

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Tracking Energy Efficiency Improvements in ASHRAE Standard 90.1

Green Building

Tracking Energy Efficiency Improvements in ASHRAE Standard 90.1

Originally published on January 17, 2018 by BNP Media through the Building Enclosure Blog. It may be the most well-known standard in the building design and construction industry: ANSI/ASHRAE/IES Standard 90.1, Energy Standard for Buildings, Except Low-Rise Residential Buildings (or more commonly, ASHRAE Standard 90.1). It serves as the basis for many energy codes across the U.S. It is also the energy standard referenced by LEED and other green building certification systems. Every few years, Standard 90.1 is updated by….

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Toward Benchmarking Embodied Carbon in Buildings

Green Building

Toward Benchmarking Embodied Carbon in Buildings

Originally published on December 14, 2017 by BNP Media through the Building Enclosure Blog.   The term “Global Warming Potential” (GWP) is a measure of greenhouse gas emissions, such as carbon dioxide and methane. These emissions are causing an increase in the absorption of radiation emitted by the Earth, increasing the natural greenhouse effect. This may in turn have adverse impacts on ecosystem health, human health, and material welfare. With regard to buildings, GWP is gauged by carbon emissions and….

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GBCI Ramps Up Service Offerings to Green Building Industry

Green Building

GBCI Ramps Up Service Offerings to Green Building Industry

Originally published on November 15, 2017 by BNP Media through the Building Enclosure Blog.   You probably know Green Business Certification Inc. (GBCI) as the third-party entity that evaluates and certifies your office’s LEED projects. What you may not be aware of is that GBCI currently provides third-party verification services for certification and credentialing on a variety of platforms in addition to LEED. By implementing a standardized, scientific process through which a product, process, or service is reviewed by a….

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Energy Use Intensity (EUI) in Simple Terms

Green Building

Energy Use Intensity (EUI) in Simple Terms

Originally published on August 17, 2017 by BNP Media through the Building Enclosure Blog.   Energy use intensity – or EUI. It has been called “the miles per gallon rating of the building industry,” but many design and construction professionals are not entirely sure how EUI is defined and what its utility is with regard to project. Below is a primer to help get anyone started.   Energy Use Intensity (EUI) Energy Use Intensity (EUI) can be defined as the….

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