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Writer's pictureAishwarya Chandrasekaran

Seeing Past the Savings Part 2: Glazing Excellence in Energy Simulation

In construction, glazing is a pivotal element where the intersection of art and science takes centre stage. Its role extends beyond mere aesthetics, delving into the creation of visually appealing environmentally sustainable spaces. Seeing past the savings: Glazing in Energy simulation


Daylight simulation relies heavily on glazing to orchestrate the interplay of natural light within our living and working environments. The strategic placement, size, and shape of windows determine how sunlight permeates these spaces, enhancing visual comfort and overall well-being. Glazing quality, particularly in visible light transmittance, ensures occupants are immersed in the ideal luminous ambience.


The art of glazing extends to managing glare control through carefully selecting materials and shading systems. Technology-enabled dynamic glazing adapts seamlessly to shifting lighting conditions while maintaining a compelling visual experience.


Energy modelling becomes a parallel player, with the type of glazing taking centre stage. Traditional single-pane glazing, being less insulated, proves more costly to operate. In contrast, double-pane and triple-pane glazing options pave the way for financial savings by reducing heat transfer and overall energy consumption. Low-E coatings, gas-filled glazing, and spectrally selective glazing, such as thermochromic and photochromic, add unique attributes to performance by improving insulation and mitigating solar heat gain. This results in lower energy requirements for heating and cooling, leading to substantial financial savings over time.


Visual representation of heat penetration in types of glazing

                                                                        Source: mdpi.com



Moreover, tinted or reflective glazing serves as a technological and artistic symphony, reducing cooling loads by minimising solar radiation. The frame materials also play a role in heat transfer. The combination of daylight simulation and energy modelling ensures sustainable, energy-efficient, and occupant-friendly spaces, creating beautifully illuminated environments.


In building energy simulation, the window-to-wall ratio (WWR) is a critical factor that balances natural light, energy efficiency, and aesthetics. The optimal WWR varies based on climate, orientation, energy measures, building function, and local codes. Energy modelling, a critical tool in this context, recognises the importance of the window-to-wall ratio influencing a building's energy performance. It discovers patterns that help designers make decisions.


Insulated Glazing Units (IGUs) are essential components that improve thermal performance by reducing the rate of heat transfer. IGUs play a crucial part in energy modelling because of their U-values and Solar Heat Gain Coefficient (SHGC), which substantially impact the heating and cooling required. Besides measurable parameters, IGUs improve occupant comfort through draught reduction and temperature mitigation—features carefully considered in energy simulations.


Tools like DesignBuilder offer comprehensive possibilities for inputting parameters regarding glazing materials, including crucial data like U-values and the Solar Heat Gain Coefficient (SHGC), allowing for precise thermal modelling.                                     



Designbuilder sample model

             Source: DesignBuilder Sample model


Simulations of daylight based on window characteristics reduce reliance on artificial lighting and improve overall energy efficiency. Furthermore, the software expertly simulates shading devices, fine-tuning control over solar heat gain and enhancing occupant comfort—a process supported by computational precision.

                                    

Designbuilder glazing model

    Source: DesignBuilder Sample glazing


In essence, glazing decisions within DesignBuilder become pivotal for creating energy-efficient, compliant, and sustainable designs that contribute to economic, thermal, and occupant comfort. It also translates into assured energy savings, making it an integral element in creating economically efficient building designs. Glazing becomes the bridge where style and economy coalesce, whether envisioning a cutting-edge workspace, crafting an ideal home or mastering the art of energy-efficient living. 



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