Building Information Modeling (BIM)
Building Information Modeling (BIM) is a computer technology that facilitates communication between different stakeholders throughout the entire lifespan of a development, from design to occupation. A BIM model is not just a 3 dimensional model that carries information from multiple disciplines – schedules and time can be visualized in the model, and inherent object properties such as the manufacturer’s details and quantities can be retained as useful data.
The possibilities are endless with BIM. At the design stage, architects and engineers can generate and exchange information efficiently, create digital representations of all the phases in the building process and simulate performance in real life. Design conflicts can thus be resolved efficiently. For G-Energy, this means that we can even more efficiently make recommendations on the design to meet environmental and energy targets.
During the handover to the operations team, information losses that traditionally occur are reduced with the BIM model, as the operations team will be using the same model. Not only are equipment replacements and other maintenance works more effective with the original design information intact, the operations team will be able to update the model for their own needs. This lessens the chances of the building operating out of the originally designed parameters, thus reducing energy loss that is often associated with operational buildings.
CFD, comfort analysis
Computational fluid dynamics (CFD) is a type of simulation and data analysis that is concerned with fluid flow. G-Energy uses this branch of physics to study how air flows in a real world scenario. Through the use of CFD, the design team is able to make informed improvements on their ventilation designs.
G-Energy is able to evaluate the thermal comfort and air quality of the building with CFD. Major indicators such as the air velocity, temperature and humidity that are critical to analyzing the occupants’ comfort level are part of the study.
CFD is also very useful in many different scenarios where the airflow needs to be determined and optimised. They include but are not limited to: natural ventilation within internal spaces and outdoor spaces such as public plazas, fire and smoke movement in fire contingency planning, heat removal at data center racks, air flow design in equipment cooling and ventilation, and hot spot elimination. G-Energy can also provide a specialized CFD simulation that targets pollutant dispersion. This ensures that the occupants’ comfort and health are minimally affected, despite the presence of a constant source of pollutants nearby, such as vehicle exhaust.
Combined with our expertise in major energy consuming systems, G-Energy is able to ensure that the comfort levels of building occupants are met with the least amount of energy required.
To evaluate the performance of existing buildings and accurately analyze potential energy consumption of new developments, G-Energy Global provides building simulations to quantitatively predict future energy usage. Also known as energy modeling, a computerized simulation is developed to examine the economics and merits of various scenarios prior to the physical construction of the building. This complements energy audits for the building when it becomes operational.
There are numerous advantages to having an updated energy model throughout a project’s design phase. Firstly, the performance of selected equipment is studied in detail to provide an independent evaluation of the design. By studying the entire building’s predicted energy usage, the model can identify potential design optimization opportunities and energy usage strategies. A comparison between different design alternatives can also be carried out, to determine the most cost effective design to meet various economic and environmental goals, such as reducing the electrical demand at areas of the building.
Energy modeling can also aid productivity during the design stage. In the case of a disagreement between designers on the building profile, energy modeling can be used as a neutral platform for designers and end users to constructively work on various scenarios to reach an agreeable result.
Using energy modeling during the design stage, highly rated Green Mark buildings in Singapore have all shown savings of at least 25% over a code compliant building. This has been in practice since 2005; energy modeling has proven itself a useful tool in facilitating a performance based design process.
Sun Path, Solar, Daylight & Glare analysis
There are numerous approaches to meet environmental and energy goals for a building at the design stage. G-Energy not only advocates good active design features, but also encourages a strong passive design for the building as well. Common passive design features include a good building orientation, and reducing the maximum building cooling load or maximizing heating depending on climatic regions.
A common theme in green building design has to do with ensuring natural daylight into the building. A daylight and glare analysis ensures that the façade design, such as the windows, atrium and skylight locations can fully utilize the natural light available for the building while making sure that the glare reflected is in compliance with local code requirements.
This is however largely limited by surrounding buildings and their shadows, which is not within the control of the design team. A sun path analysis studies how surrounding buildings affect the amount of daylight entering the target building. With this information on hand, the design team can optimize the building orientation to ensure the best design for daylight.
Another effective passive design strategy is to reduce the solar heat gain into the building in tropical region, which will in turn reduce the energy consumption for cooling. A solar analysis can predict the solar heat gain into the building for any day, month and year. Using this information, the design team can optimize the building façade design and material use to reduce the solar heat gain that enters the building.
With these strategies combined with our expertise in major energy consuming systems, G-Energy is able to ensure that the comfort levels of building occupants are met with the least amount of energy consumption.