Embodied Energy

Step 1: Identify the Type and Thickness of Acrylic Sheet

• Determine the type of acrylic sheet you're using (e.g., cast acrylic, extruded acrylic).

• Measure the thickness, length, and width of the acrylic sheet used in your project.

Step 2: Determine the Weight of the Acrylic Sheet

To calculate the weight of the acrylic sheet, use the following formula:

Weight of Acrylic Sheet=Density of Acrylic×Volume of Acrylic Shee

Where:

• Density of Acrylic is typically 1.18 g/cm³ (or 1180 kg/m³).

• Volume of the sheet is calculated as:

Volume=Length×Width×Thickness

Make sure all measurements are in consistent units (e.g., meters for length and width, and meters for thickness).

Example: If you have an acrylic sheet that is 1 meter long, 0.5 meters wide, and 0.01 meters thick, the weight would be:

Volume=1×0.5×0.01=0.005 m3

Weight=1180 kg/m3×0.005 m3=5.9 kg

Step 3: Find the Embodied Energy per Unit Weight of Acrylic

The embodied energy of acrylic can vary depending on the production process. For standard acrylic (polymethyl methacrylate or PMMA), the embodied energy is typically between 60 MJ/kg to 100 MJ/kg, depending on factors like production method, transportation distance, and manufacturing efficiency.

To get an accurate estimate:

• Check the product’s technical specifications, if available.

• Alternatively, use the average value of 80 MJ/kg (a common estimate for acrylic).

Step 4: Calculate the Embodied Energy

Now, multiply the weight of your acrylic sheet by the embodied energy per kilogram:

Embodied Energy=Weight of Acrylic Sheet×Embodied Energy per Unit Weight

Example: For a 5.9 kg acrylic sheet with an embodied energy of 80 MJ/kg:

Embodied Energy=5.9 kg×80 MJ/kg=472 MJ

Step 5: Adjust for Transportation Energy

If you want a more precise calculation, consider the transportation energy associated with moving the acrylic sheet from the manufacturer to your project site. This is especially important if the sheet was shipped over a long distance.

To estimate transportation energy, you need:

• Distance traveled: From the manufacturer to your location.

• Transportation method: Car, truck, ship, etc.

• Fuel consumption rate: Of the vehicle or vessel used.

A simple way to estimate transportation energy is to find the energy consumption per kilometer for a typical transportation method (e.g., a truck uses around 0.2 MJ per ton-kilometer). Multiply this by the distance traveled and the weight of the acrylic sheet.