energy champions training module 2.1 energy basics
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Energy Champions Training Module 2.1 Energy Basics. Energy: The Ability To Do Work. Energy comes in different forms: Heat (thermal) Light (radiant) Motion (kinetic) Electrical Chemical Nuclear energy Gravitational There are two types of energy: Stored (potential) energy - PowerPoint PPT PresentationTRANSCRIPT
Energy Champions TrainingModule 2.1
Energy Basics
Energy comes in different forms: Heat (thermal) Light (radiant) Motion (kinetic) Electrical Chemical Nuclear energy Gravitational
There are two types of energy: Stored (potential) energy Working (kinetic) energy
Energy: The Ability To Do Work
Non-renewable (a source that we are using up and cannot re-create) Oil and petroleum products — including diesel fuel, gasoline,
heating oil, and propane Natural gas Coal Uranium (nuclear energy)
Renewable (an energy source that can be easily replenished) Solar energy from the sun electricity and heat Wind Geothermal energy from heat inside the Earth Biomass from plants, which includes wood, corn ethanol, biodiesel
from vegetable oil, and biogas Hydropower from dams
Energy Sources Can be Renewable or Nonrenewable
Energy Sources – Global
Energy Sources – US
Energy Sources – US
Energy Sources – China
Energy Sources – India
Energy Sources – UK
Comparative Energy Content
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Comparative GHG Emissions of Fuels
Source: US EIA 2009
Cummins Global Energy Footprint
GHG Emissions, 2012: 721,000 MT CO2e
Energy Cost, 2012: $125M (excluding JVs)
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ELECTRICITY
Electricity Generation & Distribution
Electricity is not stored – whatever is generated is instantly used For best efficiency, electricity is transmitted at very high voltage
then converted to lower voltage at your home or facility Typical generation efficiency loss: 60%; transmission loss: 7%
Electrical Grid
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Electricity Sources – US
Electricity Sources – China
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Electricity Emission Factors
Greenhouse gas (aka “carbon”) emission rates for regional grid electricity
CO2, N2O, methane incorporated into CO2e factors from regional electricity generation source mix
Accepted GHG reporting protocol MTCO2e/MWh
Indiana 0.693
New York 0.227
Germany 0.464
Romania 0.503
UK 0.458
Mexico 0.456
India 0.919
China 0.773
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Renewable Energy Credits (RECs)
Tradable energy commodities that represent proof that electricity was generated from an eligible renewable energy resource
Only the owners of the REC can claim the carbon emissions benefit to avoid double counting
Ex.1: Carbon benefits of renewable electricity purchased under special agreement with a utility cannot be claimed by the site, if the utility owns the REC
Ex. 2: Carbon benefits of solar power generated and used on-site cannot be claimed if RECs are owned by a third party
If the site cannot claim the carbon benefits, use the regional electricity emissions factor
US Industrial Electricity Usage
Electricity Measurement
Electricity is measured in units of power called watts
– In honor of James Watt, the inventor of the steam engine
– One watt is a very small amount of power. About 750 watts equals one horsepower
– We usually measure things in a “kilowatt” (kW) which represents 1,000 watts.
– 10 x 100-watt light bulbs would use a kW
– A human climbing stairs is doing work at a rate of about 200 watts
Electricity Measurement
Electricity is measured in units of energy called watt-hours
– Those 10 x 100-watt light bulbs turned on for an hour would use one kilowatt-hour (1 kWh)
– A watt rating is like the horsepower of your car
– A watt-hour is like the fuel consumed in your car
Understanding Electrical Power
Let’s look at a simple example in order to better understand these terms .
Let’s say you are at the game and it is a really hot day. You order up a glass of your favorite brew.
The thirst-quenching portion of your beer or ginger ale is represented by kW
Unfortunately, life isn’t perfect. Along with your beer or ale comes a little bit of foam. This foam is represented by kVAR.
The total contents of your glass, kVA, is the summation of kW (the ale or beer) and kVAR (the foam).
kW
kVAR
kVA
Power Factor
Ratio of real power flowing to a load over apparent power
Relates mostly to induction motors Between 0-1
– Poor <85%
– Fair 85%-95%
– Good >95%
Efficiency & Power Factor
Power Factor (PF)
Electric Power is made up of: kW – real power kVA – apparent power kVAR – reactive power
Power Factor = Cosine (kVA/kW)
Power Factor on your Bill
Power Factor, KVAR, kW
Benefits of a High Power Factor
Improving a systems power factor will reduce the total power consumed by an electrical installation and will provide the following benefits: Financial saving
– by reducing power factor charges, electricity costs are reduced.
Extended equipment life – reduced electrical burden on cables and electrical components.
Increase load capacity – provide additional capacity for other loads to be connected.
Environmental benefit – reduced power consumption means less GHG emissions and
fossil fuel depletion by power stations.
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NATURAL GAS
US Natural Gas Usage
US Industrial Natural Gas Usage
Natural Gas Measurement
Unit is Therms 1 Therm = 100,000 Btu = 29.3 kWh Natural gas is sometimes priced in Deca-Therms
– 1 Deca-Therm = 10 Therms = 1 MMBtu
Natural Gas is sometimes metered in MCF – 1 MCF = about 10 Therms
– 1 MCF = 1000 cubic feet = 1,026,000 BTU
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Hydraulic Fracturing (“Fracking”)
Natural Gas – Impact of Fracking in US
• aka hydraulic fracturing
Natural Gas – Impact of Fracking in US
Typical Natural Gas Usage
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DISTRICT HEATING
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Typical Heat Distribution System
Steam or hot water piped from power plant to site Cummins GHG protocol assumes energy source is
90% coal, 10% gas