BUILDING ENERGY MANAGEMENT EXAM WITH
SOLUTIONS #4
Energy Management - correct answer The efficient and effective use of energy to
maximize profit and minimize cost
Objectives of Energy Management - correct answer • Improving energy efficiency •
Reduce greenhouse gas emission and improve air quality • Cultivating good
communications on energy matters • Effective monitoring, reporting and management
strategies for wise energy use • Increase returns from energy investments - research
and development • Interest in energy management program from all employees •
Reducing any interruption of energy supplies
Potential savings - correct answer Little to no capital expenditure 5-15%
Common saving 30%
Can be obtained 70%
Effects of Energy Reduction - correct answer • Reducing acid rain. (sulfur oxide, nitrous
oxide and mercury oxide from power plants) • Limiting global climate change. • Reduce
ozone depletion. • Improve national security. • Improve U.S. competitiveness. (9% of
GNP spent on energy) • Helping other countries
Energy Accounting - correct answer - Energy use monitoring
- Energy use record - Performance measure
Model Energy Management Program - correct answer Technologies 3M used for energy
efficiency include
- Heat recovery systems
- High efficiency motors
- Computerized facility management systems
- Steam trap maintenance
- Combustion improvements
- Variable air volume system
- Thermal insulation
. Energy utilization index (EUI) - correct answer - Annual Btu / ft2
- All energy used in Btu in a year divided by total area
Energy cost index (ECI) - correct answer Total cost of energy used per year divided by
total conditioned area
Energy Monitoring, Targeting and Reporting is used for - correct answer - Analyzing the
historical energy performance of industrial, commercial, and institutional facilities. -
Setting energy reduction targets
- controlling current energy performance - Projecting future energy budgets
, Goals of The Audit - correct answer • Identify the types and costs of energy use •
Understand how that energy is being used-and possibly wasted
• Identify and analyze alternatives such as
- Proved operational techniques
- New equipment that could reduce energy costs
• Perform an economic analysis on those alternatives and determine which ones are
costeffective
Audit Visit - correct answer - Historical energy use
- Factors affecting energy use
- Past energy bills
- Geographic location
- Weather data
- Facility layout and construction
- Operating hours and equipment list
Degree days - correct answer Average heating / cooling degree days to be found from
local weather station, local utility or state energy office
HDD = (65 - 53) * 30 = 360
(65 is constant)
Operating hours - correct answer • Obtain facility operating hours to determine energy
loads in off-peek times
- Number of working shifts
- Adding a second shift can save energy because energy costs is cheaper during off-
peek times (chapter 3 for on-peek and off-peek times)
Tools for the Audit - correct answer • Tape measure • Light meter that can read
footcandels\ - Footcandle: A unit of measure of the intensity of light falling on a surface
= 1 lumen / ft2 (SI system: candela = 1 lumen / m2 )
- LUX is an abbreviation for Lumens per square meter
- 1 footcandle = 10.76391 lux - Many areas in building and plant are over lighted
• Thermometers • Voltammeter - to determine operating voltage of electrical equipment
• Wattmeter/power factor meter
• Combustion analyzer - measure combustion efficiency of furnaces, boilers, or other
fossil fuel burning machines
• Ultrasonic leak detector - can pick up the sound of an air leak
• Airflow measurement devices - to measure airflow from HVAC or ventilation ducts -
Airflow hood - Voltameter - Anemometer - measures wind speed • Blower door
attachment
• Smoke generator - to find air infiltration and leakage
• Safety equipment - glasses, hearing protector, electrical insulation gloves
SOLUTIONS #4
Energy Management - correct answer The efficient and effective use of energy to
maximize profit and minimize cost
Objectives of Energy Management - correct answer • Improving energy efficiency •
Reduce greenhouse gas emission and improve air quality • Cultivating good
communications on energy matters • Effective monitoring, reporting and management
strategies for wise energy use • Increase returns from energy investments - research
and development • Interest in energy management program from all employees •
Reducing any interruption of energy supplies
Potential savings - correct answer Little to no capital expenditure 5-15%
Common saving 30%
Can be obtained 70%
Effects of Energy Reduction - correct answer • Reducing acid rain. (sulfur oxide, nitrous
oxide and mercury oxide from power plants) • Limiting global climate change. • Reduce
ozone depletion. • Improve national security. • Improve U.S. competitiveness. (9% of
GNP spent on energy) • Helping other countries
Energy Accounting - correct answer - Energy use monitoring
- Energy use record - Performance measure
Model Energy Management Program - correct answer Technologies 3M used for energy
efficiency include
- Heat recovery systems
- High efficiency motors
- Computerized facility management systems
- Steam trap maintenance
- Combustion improvements
- Variable air volume system
- Thermal insulation
. Energy utilization index (EUI) - correct answer - Annual Btu / ft2
- All energy used in Btu in a year divided by total area
Energy cost index (ECI) - correct answer Total cost of energy used per year divided by
total conditioned area
Energy Monitoring, Targeting and Reporting is used for - correct answer - Analyzing the
historical energy performance of industrial, commercial, and institutional facilities. -
Setting energy reduction targets
- controlling current energy performance - Projecting future energy budgets
, Goals of The Audit - correct answer • Identify the types and costs of energy use •
Understand how that energy is being used-and possibly wasted
• Identify and analyze alternatives such as
- Proved operational techniques
- New equipment that could reduce energy costs
• Perform an economic analysis on those alternatives and determine which ones are
costeffective
Audit Visit - correct answer - Historical energy use
- Factors affecting energy use
- Past energy bills
- Geographic location
- Weather data
- Facility layout and construction
- Operating hours and equipment list
Degree days - correct answer Average heating / cooling degree days to be found from
local weather station, local utility or state energy office
HDD = (65 - 53) * 30 = 360
(65 is constant)
Operating hours - correct answer • Obtain facility operating hours to determine energy
loads in off-peek times
- Number of working shifts
- Adding a second shift can save energy because energy costs is cheaper during off-
peek times (chapter 3 for on-peek and off-peek times)
Tools for the Audit - correct answer • Tape measure • Light meter that can read
footcandels\ - Footcandle: A unit of measure of the intensity of light falling on a surface
= 1 lumen / ft2 (SI system: candela = 1 lumen / m2 )
- LUX is an abbreviation for Lumens per square meter
- 1 footcandle = 10.76391 lux - Many areas in building and plant are over lighted
• Thermometers • Voltammeter - to determine operating voltage of electrical equipment
• Wattmeter/power factor meter
• Combustion analyzer - measure combustion efficiency of furnaces, boilers, or other
fossil fuel burning machines
• Ultrasonic leak detector - can pick up the sound of an air leak
• Airflow measurement devices - to measure airflow from HVAC or ventilation ducts -
Airflow hood - Voltameter - Anemometer - measures wind speed • Blower door
attachment
• Smoke generator - to find air infiltration and leakage
• Safety equipment - glasses, hearing protector, electrical insulation gloves
