2180910 (ECA) - Case studies as Experiment 10

EXPERIMENT 10

1.  A CASE STUDY OF REPLACING EXISTING LIGHTING SYSTEM (T12 FLUORESCENT) BY LED LIGHT IN THE CAMPUS OF AN INSTITUTIONAL AREA

Estimate Electrical Consumption

• Calculate Total Watts (watts/fixture ×No. of fixtures/1000 = Existing kW)

• Estimate of Annual Hours of Use

• Estimate Annual Lighting Energy Cost (Existing kW × annual hours × Rs/kWh = Rs/year)

Calculate Energy Savings

• Determine new total kW after LED light.

• Determine change in annual operating hours if lighting controls are changed.

• Calculate energy savings (kW before—kW after) × hours of operation = kWh

• Calculate energy cost savings (kWh × Rs./kWh = annual cost savings)

2. A CASE STUDY OF 3 MOTORS TO FIND ENERGY SAVING AND PAYBACK

DATA:

·         75% OF LOADING AND ENERGY CHARGE RS. 7 PER KWH

MOTOR 1	MOTOR 2	MOTOR 3
81% Efficiency, 5KW,	84.7 % Efficiency, 5KW	88.3 % Efficiency, 5KW

Find energy saving and payback period if motor 1 has to be replaced with motor 2 and motor 3