Site Consumption Summary
Site Consumption Summary
The Site Consumption Summary report shows the energy consumption of the project for all fuel types. The HVAC Energy Usage chart provides a visual comparison of the different Site Energy usage categories pertaining to the HVAC systems. These components include Heating, Cooling, Fans, Pumps, Heat Rejection, Humidification, and Heat Recovery. The Total Site Energy Breakdown chart compares the HVAC system energy consumption with the other energy consuming components including Water Systems, Interior Lighting, Exterior Lighting, Interior Receptacles, Exterior Receptacles, and Refrigeration equipment. This chart does not include any on-site energy generation as this pertains solely to energy usage.
The Monthly Energy End Use section displays the monthly energy consumption profile for each fuel type on a project. The energy use intensity is also provided.
Total Site Energy Breakdown graph
This pie chart provides a quick high-level summary of interior lights, versus interior equipment, versus HVAC equipment as percentages.
HVAC Energy Usage graph
This bar graph provides a quick high-level summary of the energy consumption of pumps, fans, cooling equipment, and heating equipment.
Energy Consumption table
This table gives a breakdown of each category (described below) of energy consumers.
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Heating:
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All heating equipment including consumers associated with their equipment libraries. For example, electric heating coils, electric boilers, boiler parasitic loads. This does not include fans or pumps defined separately in the loop.
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Cooling:
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All cooling equipment including consumers associated with their equipment libraries. For example DX cooling coil and its crankcase heater, air cooled piece of equipment and its condenser fan, water cooled chiller, cooling mode of operation for a heat pump. This does not include fans or pumps defined separately in the loop.
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Fans:
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All fans (supply, return, OA, exhaust) but does not include condenser fans.
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Pumps:
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All pumps in loops defined in Create Plants.
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Heat Rejection:
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This includes both the condenser fan and the basin heater for condenser loops defined in Create Plants.
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Humidification:
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Humidifier defined in Create Systems.
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Heat Recovery:
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Energy consumption associated with airside energy recovery devices. This is not the amount of energy recovered. This also does not include waterside heat recovery.
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HVAC:
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This is the total of Heating, Cooling, Fans, Pumps, Heat Rejection, Humidification, and Heat Recovery.
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Water Systems:
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Exterior Water Equipment from the Power-Using Objects toolbar on the Create Site tab.
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Interior Lighting:
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Interior lighting defined in the internal load properties on the Create Building tab.
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Exterior Lighting:
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Exterior lighting defined in the Create Site tab.
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Interior Equipment:
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Miscellaneous equipment defined in the internal load properties on the Create Building tab.
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Exterior Equipment:
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Exterior Fuel Equipment from the Power-Using Objects toolbar on the Create Site tab.
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Refrigeration:
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Not yet supported.
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Non-HVAC:
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This is the total of Water Systems, Interior Lighting, Exterior Lighting, Interior Equipment, Exterior Equipment, and Refrigeration.
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Generators:
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This is the fuel used by Internal Combustion Engine and Combustion Turbine from the Power-Generating Objects toolbar on the Create Site tab. Note, this is only the fuel consumed to generate the electricity, not the generated electricity because this table only accounts for energy consumed.
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Site Generation:
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This is the total of the Generators.
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Grand Total:
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This is the total of everything in the column.
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Column Description
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Electricity:
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Electric consumption for each category
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Gas:
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Natural Gas consumption for each category
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District Cooling:
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District coolingconsumption for each category
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District Heating:
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District heating consumption for each category
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Other Utilities:
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This is a sum the consumption of all other utilities (Coal, Diesel, Fuel Oil #1, Fuel Oil #2, Gasoline, Other Fuel 1, Other Fuel 2)
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Site Energy:
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This is a sum of the Electricity, Gas, District Cooling, District Heating, and Other Utilities columns
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Site Energy Use Intensity:
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This is a ratio of the Site Energy and the total building area.
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Source Energy:
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This includes the inefficiencies in producing and transferring energy to the building, not just the energy consumed on the site. This is affected by the resource utilization factors defined on the Energy Simulation Parameters tab of the Simulation Settings.
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Source Energy Use Intensity:
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This is a ratio of the Source Energy and the total building area
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Water:
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This is the water consumed by each category
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Source Energy
The source energy applies the fuel factors from the simulation settings. In the example below, the total efficiency of the electric grid is assumed to be 1/3.167 = 31.58 %. This means that for every btu or joule of energy contained in the power plant fuel, 0.3158 btu or joule is delivered to the site. This provides a mechanism to account for the total energy footprint of the site. These values are subjective and up for a high degree of interpretation. Some might argue that these values should be inflated to include all energy involved in creating the energy. The values, below, are loose “typical” values and require review for each situation.
In the example below, heating is divided between gas and electric, so we will show an example using the cooling energy. 162,901 x 3.167 = 515,908. For pumps, 2.199 x 3.167 = 6,964.
Benchmarking table
This table displays data from the Commercial Building Energy Consumption Survey (CBECS) from the U.S. Energy Information Administration. The Gross Floor Area comes from the occupiable area of the building being modeled. The Region should be populated based on weather location. The Building Type and CBECS Survey Year in this can be set in the Simulation Settings on the Energy Simulation Parameters tab. The Benchmark EUI (Energy Use Intensity) comes from the CBECS data and can be a simple benchmark comparison to the modeled building’s Site Energy Use Intensity Grand Total.
The benchmark is selected in the simulation settings. See: https://www.eia.gov/consumption/commercial/
Monthly Energy End Use tables
The rest of this report provides more detail for each utility showing monthly consumption in each category. The data in these tables should sum to the totals in the Energy Consumption table.
