1. Energy Assessment Spreadsheet Ashok Kumar Somik Ghose Rahul Pendse Charanya Varadarajan

2. Description The spreadsheet is an useful and easy-to- use tool for energy assessments. It provides a complete break-up and summaries of the total annual energy consumption and cost. It helps in identifying avenues for energy and cost savings.

3. Description (contd.) It has separate sections for the major areas of energy consumption – lighting, motors and HVAC systems. Each section requires certain basic input information. The sections are coded to auto-generate results with the input data.

4. Lighting This section has three worksheets – Lighting Data, Lighting Cost and Lighting Cost Reductions. The Lighting Data sheet is for entering the input data. Input data includes fixture details and their respective wattage, quantity, and annual operating hours.

5. Lighting (contd.) Fixture Types A, B, C,… have been pre- assigned for convenience. A brief description of various types of fixtures is entered in Fixture Details column. The corresponding wattage, quantity and annual operating hours of each fixture type needs to be entered in the respective columns. Lighting Data Worksheet

6. The Cost of Energy per kWh has to be entered in the specified cell at the top of this worksheet. The worksheet will generate the Total Wattage, Total Hours/Year, kWh/Year and Cost/Year for each fixture type when the required input data has been entered. Lighting (contd.) Lighting Cost Worksheet

7. Such a summary will help to identify the fixture types with high energy consumption. Lighting (contd.) Lighting Cost Worksheet (contd.)

8. The Total kW/Year, Total kWh/Year and for all the fixture types will also be generated in this worksheet. It is always possible to go back to the initial Lighting Data worksheet and alter the input data and study changes in the energy consumption and cost. Lighting (contd.) Lighting Cost Worksheet (contd.)

9. Various cost reduction opportunities in lighting are available. For example: 1. Use of Electronic Ballast instead of Magnetic Ballast Potential Reduction in Cost: 15-20 % Potential Reduction in Cost: 15-20 % 2. Use of Reflectors Potential Reduction in Cost: 10-15 % Potential Reduction in Cost: 10-15 % 3. Reduced Wattage Potential Reduction in Cost: 10-20 % Potential Reduction in Cost: 10-20 % Actual reduction in cost by implementing a particular option is specific to the type of lamp or fixture and the associated accessories. The manufacturer should be contacted for an estimate of the potential cost reduction. Lighting (contd.)

10. This worksheet will give an estimate of the Annual Savings for each fixture type. Current Annual Cost is taken automatically from the previous worksheet. A description of the Savings Opportunity and the corresponding % Reduction in Cost need to be entered in the specified columns. Lighting (contd.) Lighting Cost Reductions Worksheet

11. Motors Introduction 60% of the electricity consumed in the U.S is due to motor driven equipment. Motor systems consume approximately 290 billion kWh per year. Energy consumed by motors can be reduced by 18% by the application of proven technologies & sound management practices. Thus improvements to motor systems in the industries can yield enormous energy and cost savings.

12. Motors(contd.) This section has two worksheets – Motors, and Motor Operating Cost. The Motors worksheet requires the input details of the the motors. The input details include the motor type description, wattage of motors, quantity of each motor type and total operating hours per year for each motor type. The input data has to be entered in the respective fields in the worksheet.

13. Motors (contd.) Similar to lighting data worksheet, Motor Type 1,2,3,… has been pre-assigned for convenience. Motor Description field requires a brief description of motor types. The wattage, quantity and annual operating hours of each motor type is to be entered in the respective columns. Motors Worksheet

14. Motors (contd.) The cost of energy is to be entered in the cell provided at the top of the Motor Operating Cost Worksheet. The spreadsheet generates the Total wattage, Total hours/year, kWh/ Year, and the Cost/Year. Motor Operating Cost Worksheet contd. Motor Operating Cost Worksheet contd. Motor Operating Cost Worksheet

15. The Total kW/Year,Total kWh/Year and Total Cost/Year for all the motor types is also generated. This gives an overview of the energy consumed by motors and the cost of energy incurred on motors in any plant. Replacing inefficient motors with efficient ones and proper maintenance of these can result in considerable energy savings. Motors (contd.) Motors Operating Cost Worksheet (contd.)

16. HVAC SYSTEMS This section has two worksheets – HVAC systems and HVAC systems operating cost. The HVAC systems sheet is for entering the input data. Input data includes description of individual components of each HVAC system, wattage, quantity and annual operating hours for each component.

17. HVAC systems (contd.) HVAC SYSTEMS WORKSHEET Component types A, B, C,… has been pre- assigned for convenience. A brief description of individual components has to be entered in the Description column. The corresponding wattage, quantity and annual operating hours of each component needs to be entered in the respective columns.

18. HVAC systems (contd.) HVAC SYSTEM OPERATING COST WORKSHEET The Cost of Energy per kWh has to be entered in the specified cell at the top of this worksheet. Once the unit cost has been entered, the worksheet will generate the Total Wattage, Total Hours/Year, kWh/Year and Cost/Year for each component.

19. HVAC systems (contd.) HVAC SYSTEM OPERATING COST WORKSHEET (contd.) Such a summary will help to identify the components with high energy consumption.

20. HVAC systems (contd.) HVAC SYSTEM OPERATING COST WORKSHEET (contd.) The Total kW/Year, Total kWh/Year and for all the fixture types will also be generated in this worksheet. It is always possible to go back to the initial Lighting Data worksheet and alter the input data and study changes in the energy consumption and cost.