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METHODOLOGY
Energy tool set development
The E-TOOL is intended to be a simple and operational tool for energy rating of existing buildings.
E-TOOLSET methodology has three main parts
E-TOOL User Data Sheets
E-TOOL Process
E-TOOL Report
E-TOOL User Data Sheets
The E-TOOL User Data Sheets, are divided into two different columns.
Data collection:
General data of the building:
- Location
- Category
- Shape and physical data
- Climatized Area
Weather Data (Degree days)
Heating, Cooling, Domestic Hot Water, Lighting, Envelope characteristics.
Energy consumption: Based on metered energy
Selection of saving measures
Typical saving measures in each partner country
- Changing of boilers
- Changing of windows
- Insulation of walls
- Installation of solar panels
E- TOOL process.
The E-TOOL process needs of additional information and includes all the internal calculations necessary in order to get the final E-TOOL report.
Internal calculations
The E-TOOL uses several correlations and saving coefficients to calculate the energy savings obtained with each saving measures.
Additional information
The E-TOOL needs inputs data that will have to be defined by each country:
Average consumption percentage of each use (heating, cooling…) depending on the type of building and the climatic zone.
Price of saving measures: The E- TOOL will include the price of the saving measures for Spain, but as the construction market prices differ a lot between countries, each country should include their own construction prices.
Energy prices and annual rate of increase.
CO2 emissions of each fuel type.
E- TOOL report
Final report, obtained after E-TOOL internal process will include information about potential savings, initial investment, payback time and CO2 savings for each saving measures.
The E-TOOL user must select the best five saving measures, according to the payback time and the energy savings achieved. Then, the E-TOOL calculates:
Total potential savings
Total investment cost of energy saving measures
Payback time of the energy saving measures
Total CO2 savings
Initial E-Tool Benchmark
Final E-Tool Benchmark
Open PDF-diagram #1
Open PDF-diagram #2
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