Building Energy Modeling

U.S. Energy Engineers delivers state-of-the-art energy modeling capabilities to achieve commercial and technical differentiation. We provide specialized modeling services using some of the world’s best building modeling software. Our capabilities enable us to work on design projects that compliment and accommodate energy efficiency and sustainable design. We integrate modeling techniques to analyze sustainability of buildings in adherence to building standards such as ASHRAE, LEED etc.

Energy Modeling Design Support

This service is ideal for organizations that prefer not to undertake modeling, or those that need support with particular complex projects. It is ideal for those organizations that are limited by cost and time inhibitions. U.S. Energy Engineers can work on any modeling project from conception through to implementation or certification, or work on a specific part of the project. Our expertise is in the following areas:

Dynamic Thermal and Bulk Airflow

We develop complex mathematical models using real climatic data for the building's location. Our design teams use several software programs approved by U.S. Department of Energy (DOE) and other authorities. We optimize and calculate appropriate sizing and selection of HVAC systems correctly, make glazing and fabric decisions, prove compliance with building regulations, assess the performance of natural ventilation and other passive design techniques and generally optimize the energy and environmental performance of the building.

HVAC Plant and Controls

With our capabilities in HVAC design, HVAC and controls simulation is done in conjunction with dynamic thermal and bulk airflow simulation. We can model specific HVAC systems to optimize energy performance for planned buildings or existing ones. This is done with high levels of detail and accuracy to provide the necessary energy and environmental performance indicators of a building and its plant (such as annual energy consumption, running costs and carbon emissions).

Computational Fluid Dynamics (CFD)

We model patterns of airflow occurring in and around a building, the distribution of heat, and even contaminants, using computational fluid dynamics (CFD) simulation. A building's external characteristics are commonly used in the assessment of issues such as pedestrian comfort, façade design and the distribution of contaminants. We use CFD simulation to determine the distribution of heat and movement of air inside complex spaces such as atria, and for fine-tuning systems of air distribution (both mechanical and passive). Other applications of CFD include examining specific design issues such as downdraughts, stack effect and smoke movement.

Solar Shading

Where needed, we perform solar shading analysis to allows visual inspection of shadows cast inside and outside the building. The data provided by numerical analysis is used to enhance the accuracy of thermal simulation - increasing the accuracy of predicted temperatures, energy gains and loads.

Day and Artificial Lighting

In addition to our lighting design capabilities, we provide light modeling services to accurately determine the appearance and effects of light outside or inside a building from both daylight and artificial sources. Our software allows us to perform complex ray-tracing techniques. Potential causes of glare can also be applied to our analyses. Photo-realistic images of a very high quality can be produced (where necessary), enabling the design team to envisage how the space will actually appear under a specific day/artificial lighting instances. This is particularly useful in the design of artificial lighting systems where traditional lighting design calculations do not provide the level of performance information required to get the design right first time.

A selection of our capabilities:

  • We can quantify passive system design techniques such as radiant floors and exposed thermal mass can be used to improve:
  • Cooling loads
  • Energy Policy Act (2005) + LEED energy credits
  • Carbon usage
  • Occupant comfort
  • We model ventilation, under floor air distribution or mixed mode HVAC strategies may improve the same elements mentioned above
  • We model and analyze daylighting to improve and design for:
  • Increase cooling loads
  • Decrease chance of a higher LEED energy credit
  • Increase potential for visual discomfort
  • We can analyze how to reduce incident light that may:
  • Decrease you daylighting level
  • Reduce chance of a LEED daylighting credit
  • Reduce likelihood of visual discomfort