Green Tree Building Energy (P)
     
 
 
 

Energy Simulation & Energy Modeling

Simply stated energy modeling uses computer software to predictably simulate building energy consumption by analyzing system interactions.

The basic method defined by LEED rating/TERI GRIHA/or ECBC rating's (expected) energy modeling protocol requires the project teams to compare the building's annual "Proposed Design Energy Consumption" to a standard value called the "Standard Design Energy Consumption". The "Standard Design Energy Consumption" value is taken for a building of same use and configuration as the target building that is compliant with the default prescriptive parameters of Energy Conservation Building Code (ECBC) supported by ASHRAE 90.1

Energy Simulation Study simulates the energy required in a building at the drawing board level of a building design using real time data and weather conditions of that particular place. This process also gives us the measure of the energy that will be consumed in that building as per various national and international standards. This helps us to set the bench mark level of energy consumption for a particular building.

Energy Simulation Study helps you to take informed decision in the design and construction of the buildings from an Energy Consumption point of view. We can use this tool to help us decide the right or optimum material and equipment specifications in a scientific and systematic manner.
Energy Modeling and Lighting Stimulation is a process to devise simulation model for optimizing energy efficiency of the proposed projects:

  • Building Envelope (Wall, Windows, Roof etc.)
  • HVAC systems and its components.
  • Day lighting Simulation for optimizing natural lighting and lighting controls.

We conduct whole building simulation work and assist design teams to improve overall energy efficiency and reduce operating costs in new commercial, institutional and multi-residential buildings.
Scope of Work

  • Detailed Energy Modeling and Building Simulation
  • Defining Modeling Assumptions
  • Developing Proposed and Base Case Building Simulation Model

Building performance Analysis is an extremely powerful way to analyze, assess and quantify different design concepts and low carbon technologies.
It can achieve significant energy reductions, ensure occupant comfort, and support informed, multi-disciplinary decision-making.
There are many benefits to performing energy modeling on your building:

  • Energy Simulation provides an independent evaluation of the energy efficiency of your proposed new design.
  • Energy Simulation can provide you with the most cost effective design to meet your environmental goals.
  • Energy Simulation quantifies the operating savings over the life of the building.
  • You can do the design right the first time instead of paying more to correct it later.

Energy modeling should be done early in the schematic design phase to ensure that efficiency goals are met with minimal complications or costs. A preliminary model is used at this stage to estimate savings. We can also advise the team on any changes that occur during the design process.

On receipt of drawings and specifications, we undertake the Energy modeling & prepare a modeling report. This report describes our modeling approach and assumptions as can be used as part of the LEED application.

For maximum benefit from energy modeling, it is important that the energy modeler get engaged early in the design process. A good time is when schematic drawings and mechanical and electrical system design concepts have been prepared

Energy Simulation Study simulates the energy required in a building at the drawing board level of a building design using real time data and weather conditions of that particular place. This process also gives us the measure of the energy that will be consumed in that building as per various national and international standards. This helps us to set the bench mark level of energy consumption for a particular building.

Energy Simulation Study helps you to take informed decision in the design and construction of the buildings from an Energy Consumption point of view. We can use this tool to help us decide the right or optimum material and equipment specifications in a scientific and systematic manner.

Energy simulations, especially when used in conjunction with measured data, are the most reliable and technically defensible method for determining energy savings in buildings. A building energy simulation program is no less and no more than an hour-by-hour calculation of a building's energy use using complex thermodynamic equations that take into account the constant changes in the weather and the building's internal conditions, and the dynamic response of the building and space conditioning system to such changing conditions. Energy simulation programs are very good in keeping track of the building physics. Energy simulation programs are not good at predicting occupant behavior. The largest cause of error between simulated and measured energy usage are differences between the assumed and actual operating schedules of the building.

Energy simulations have been used for over twenty years to demonstrate compliance to building energy standards, particularly in the U.S., but also increasingly in other countries including China and India. Energy simulations are also used to calculate energy credits for green building certification, e.g., LEED, for evaluating DSM projects to go beyond the building energy standard and to determine the energy savings from building efficiency projects, e.g., calibrated simulation is included in IPMVP as Option D for assessing whole-building retrofit projects when direct measurement of energy reductions is difficult. Even when measured data are plentiful, energy simulations are still needed to normalize the data for differences in weather, and changes in human behavior or other exogenous effects. (NM0120 was rejected, because it could not isolate efficiency gains from external factors).

The discrepancies often cited between simulated and measured results occur because simulations were being used to predict energy use in the absence of information on the building conditions, such as in compliance calculations for new buildings that have yet to be constructed. Furthermore, in many of these applications, the primary goal of the simulations is not to accurately predict future building energy use, but to create a level playing field by which all buildings are evaluated fairly under the same operating conditions and weather.

When there is measured energy data, such as for an existing building, the computer model can be calibrated to reduce the discrepancy to small values (typically within 10% annual, 30% monthly).The reliability of the simulation results depends largely on the availability of input data to develop and output data to calibrate the computer model. In any case, given the same input and output information, the results from computer simulations will be as reliable as or more so than those produced by any other method, especially in determining the amount of energy savings.

     Energy Modeling & Simulation
     Green Building Facilitation
     Lighting Simulation
     Commissioning Services
     Dynamic Thermal Modeling
     Energy Audit & Performance Study
     Clean Development Mechanism (CDM)
      & Carbon Trading
     Material Procurement Services
     GRIHA Consultants
     LEED Consultants
     IGBC
     Zero Energy Buildings
 
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