Energy audit for Electrical Equipment of a Private Resident

Energyauditfor Electrical Equipment of a Private Resident

Energyauditfor Electrical Equipment of a Private Resident

Anenergy audit refers to surveying techniques as well as analysis ofenergy usage within a particular facility or building and anyequipment in such a building or facility. It incorporates detailedlists of all measures that aim at achieving effective and efficiencyuse of energy and financial analysis for all identified measures(Krarti, 2010). It is advisable to create a diagram that clearly howeach device consumes energy after the completion of an energy audit.After the energy auditing process is completed an energy saving planshould be implemented.

  1. Equipment

  1. Equipment: power monitor, thermal leak detector

  2. Cost of the equipment: power monitor-about 120 dollars

Thermalleak detector- about 55 dollars

  1. Procedure for the energy auditing

  1. Proper understanding of electricity bill: review of total electricity used and the cost of total electricity.

  2. Taking a roll of all appliances that consume energy: it should include all large appliances and electrical gadgets as well as the counting of all light bulbs used at home

  3. Determination of wattage of light bulbs as well as age of appliances

  4. Make use of power monitor to find how energy has been used in various home appliances: this involve looking for alternative wattages of light bulbs and proper inspection of how older appliances have been using energy

  5. Comparison of energy consumption to more-efficient appliances that are used in the modern industry: power monitor help determine how current appliances consume energy while product labels or company website provide useful information on energy consumption of modern appliances

  6. Investigation of any excess energy that might have been wasted: total energy that is used by both current house appliances and modern efficient appliances

  7. Lay down all cost that may be required in the upgrading appliances (any cost that may be required in purchasing all new appliances needed for substantial energy savings)

  8. Determination of any time endured until money is saved: it is good to note that any time fueled at the usage of new appliances before savings in energy is reflected in the amount money saved

4.Energy Consumption Summary of Energy Consuming Devices

Lightsinformation

Lights

No. of Light bulbs (unit)

10

Each bulb power consumption(Watt)

70

Usage hours per day per bulb (hr)

8

No. of days per month (day)

30

EnergyUsage of All Current in Using Electrical Appliances

Device

Energy Usage/Hour (kWh)

(1)

Daily Usage Hours

(2)

Energy Consumption of Current Appliances (kWh)

(3) = (1)×(2) ×30

1

Lights

2

5.0

300

2

Washer

2.05

1.0

61.5

3

Dryer

2

1.0

60

4

Air Conditioner

1.1

6.0

198

5

Refrigerator

1.1

23.9

789

6

Microwave

2

0.4

24

7

Computer

.55

12.0

198

8

Stove

2

2.0

120

9

Dishwasher

1.7

1.2

61.2

10

Toaster

0.09

0.1

0.27

11

Electric Water Heater

3

2.7

243

12

Small Appliances

(Iron, toaster oven, etc.)

0.25

0.17

1.28

Total Energy Usage/Month (kWh)

1756.25

Apower monitor was used to measure usage per hour for all appliancesexcept electric dryer, lights, and water heater dryer since they arewired directly.

of Energy Usage and Cost

Electric Bill

&nbsp

Electricity Used

&nbsp1756.25 kWh

Cost ($)

&nbsp$175.5625

EnergyUsage/Month = Energy Usage/Hour × Hours of Usage/Month

Costof Energy Usage/Month = Energy Usage/Month×$/kWh

EnergyUsage Consumption with Energy Efficient Appliances

Appliances

Age(or yr)

Energy Consumption of Current Appliances (kWh)

(from (3) of Table 2)

(1)

Energy Consumption of Energy Efficient Appliances (new) (kWh) (Appendix B)

(2)

Cost for Purchasing Energy Efficient Appliances ($)

(3)

Excess Energy (kWh)

(4) = (1)-(3)

1

Lights

10

300

80

40

220

2

&nbspWasher

15

61.5

10

650

51.5

3

&nbspDryer

15

60

54

500

6

4

&nbspAir Conditioner

10

198

67

330

131

5

&nbspRefrigerator

20

789

50

1300

739

6

&nbspMicrowave

12

24

11

150

13

7

&nbspComputer

1

198

108

850

90

8

&nbspStove

15

120

80

650

40

9

&nbspDishwasher

20

61.2

40

600

21.2

10

&nbspToaster

5

0.27

0.11

50

0.16

11

&nbspWater Heater

5

243

100

300

143

12

&nbspSmall Appliances

10

1.28

1.08

250

0.2

&nbsp

Total

1756.25

301.19

1455.06

Bylooking at the column that have values for excess energy used andcomparing the amount of energy used by existing appliances with thenewer energy efficient appliances it is possible to determine wherethe potential for energy savings exists. If all appliances in thehouse were replaced with energy efficient appliances, energyconsumption would decrease from 1756.25 kWh to 301.19 kWh hence, thepercentage energy reduction would be 82.9 %.

5.Calculating Payback Time

PaybackTime refers to the total time endured or consumed until money issaved for each and every single appliance. This is equivalent to(cost of purchasing new appliance) / [(former monthly cost) – (newmonthly cost)] = # of months (Abbi &amp Jain, 2011)

-Total Replacement Cost =Costfor purchasing new appliance (including sales tax and delivery)

-EnergyCurrently Used = Monthly Energy Consumption (PresentAppliance/Measure by Power Monitor)

-Energy used by new energy efficient appliance = Energy Consumptionfrom Energy Star Appliance/Energy Guide Sticker

-ExcessEnergy = Amount of energy currently used – Amount used by modernappliances

PaybackTime for Various Appliances

1

&nbspLights

Calculating the payback time for the replacement incandescent light bulbs with energy efficient light bulbs:

Replacement Wattage: 100 W/bulb Number of Light bulbs: 20 Cost = (# of bulbs) * (price per bulb)

Cost = 20 x $2.50

Cost = $50.00

Monthly cost of energy by incandescent light bulbs is 300 kWh x $0.1 kWh = $30.00

Monthly cost of energy used by energy efficient light bulbs is 80 kWh x $0.1 kWh = $8.00

Monthly Energy Savings = Cost of energy for old bulbs – Cost of energyfor new bulbs

Monthly Energy Savings= $30.00 – $8.00

Monthly Energy Savings= $22.00

Payback Time = Cost of light bulb replacement /Monthly Energy Saving

Payback Time = $50/$22

Payback Time = 2.27 months

2

&nbsp

Washer

Cost of the energy used by the old washer:

61.5 kWh x 0.1 $/kWh = $6.15

Cost of energy used by new energy efficient washer

9.1 kWh x 0.1 $/kWh = $1.00

Payback time = Cost of New Energy Efficient washer/Monthly Saving of Energy:

Payback time = $650/$6.15 – $0.91 = 104 months (8.7 years)

3

&nbspDryer

Cost of the energy used by the old Drier:

60 kWh x 0.1 $/kWh = $6.0

Cost of energy used by new energy efficient dryer

54 kWh x 0.1 $/kWh = $5.4

Payback time = Cost of New Energy Efficient dryer/Monthly Saving of Energy:

Payback time = $500/$6.0 – $0.91 = 77.93 months (6.5 years)

4

&nbspAir Conditioner

Cost of the energy used by the old air conditioner:

198 kWh x 0.1 $/kWh = $19.8

Cost of energy used by new energy efficient air conditioner:

67 kWh x 0.1 $/kWh = $6.7

Payback time = Cost of New Energy Efficient Air Conditioner/Monthly Saving of Energy:

Payback time = 330/$19.80-$6.7 = 9.97 months

5

&nbspRefrigerator

Cost of the energy used by the old refrigerator:

789 kWh x 0.1 $/kWh = $78.90

Cost of energy used by new energy efficient refrigerator:

50 kWh x 0.1 $/kWh = $5.0

Payback time = Cost of New Energy Efficient Refrigerator/Monthly Saving of Energy:

Payback time = 1300/$78.90 -$5.20 = 11.5 months

6

&nbspMicrowave

Cost of the energy used by the old microwave:

24 kWh x 0.1 $/kWh = $2.40

Cost of energy used by new energy efficient microwave:

11 kWh x 0.1 $/kWh = $1.1

Payback time = Cost of New Energy Efficient microwave/Monthly Saving of Energy:

Payback time = 150/$2.40-$6.7 = 55.8 months (4.7 years)

7

&nbspComputer

Cost of the energy used by the computer:

198 kWh x 0.1 $/kWh = $19.8

Cost of energy used by new energy efficient computer:

108 kWh x 0.1 $/kWh = $10.8

Payback time = Cost of New Energy Efficient computer/Monthly Saving of Energy:

Payback time = 850/$19.80-$10.8 = 32.13 months (2.7 years)

8

&nbspStove

Cost of the energy used by the old stove:

120 kWh x 0.1 $/kWh = $12.0

Cost of energy used by new energy efficient air conditioner:

80 kWh x 0.1 $/kWh = $8.0

Payback time = Cost of New Energy Efficient stove/Monthly Saving of Energy:

Payback time = 650/$12.0-$8.0 = 796.17 months (66.3 years)

9

&nbsp

Dishwasher

Cost of the energy used by the old dishwasher:

61.2 kWh x 0.1 $/kWh = $6.12

Cost of energy used by new energy efficient dishwasher

40 kWh x 0.1 $/kWh = $4.0

Payback time = Cost of New Energy Efficient dishwasher/Monthly Saving of Energy:

Payback time = $600/$6.12 – $4.0 = 94 months (7.8 years)

10

&nbspToaster

Cost of the energy used by the old toaster:

0.27 kWh x 0.1 $/kWh = $0.027

Cost of energy used by new energy efficient toaster

0.11 kWh x 0.1 $/kWh = $0.011

Payback time = Cost of New Energy Efficient toaster/Monthly Saving of Energy:

Payback time = 50/$0.027-$0.011 = 1851.8 months (154.3 years)

11

&nbspWater Heater

Cost of the energy used by the old water heater:

243 kWh x 0.1 $/kWh = $24.3

Cost of energy used by new energy efficient water heater:

100kWh x 0.1 $/kWh = $10.0

Payback time = Cost of New Energy Efficient water heater/Monthly Saving of Energy:

Payback time = 300/$24.3-$10.0 = 2.35 months

12

&nbspSmall Appliances

Cost of the energy used by the small appliances:

1.28 kWh x 0.1 $/kWh = $0.128

Cost of energy used by new energy efficient small appliances:

1.08 kWh x 0.1 $/kWh = $0.108

Payback time = Cost of New Energy Efficient small appliances/Monthly Saving of Energy:

Payback time = 250/$0.128-$0.108 = 1953.02 months (162.8 years)

6.Recommendation

Individualsinterested in knowing equivalencies for emissions reduction fromrenewable energy programs or energy efficiency can make use of theenergy saved (Conway, 2008). These programs play a key role inaffecting power plants that are purchased online in order to meetrequired or necessary demand.

References

Abbi,Y.P &ampJain, S. (200). Handbook on Energy Audit and EnvironmentManagement. New Delhi: TERI Press.

Conway,J. (2008). BusinessEnergy Audit and Control Practices. BusinessEconomics,15 (2), 21-22.

Krarti,M. (2010). Energy Audit of Building Systems: An Engineering Approach.New York: CRC Press.