# Calculating Efficiency Opportunities in Insulation Workgroup Meeting May 2014 Charlie Schreier, PE Engineer.

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Calculating Efficiency Opportunities in Insulation Workgroup Meeting May 2014 Charlie Schreier, PE Engineer

The Benefits of Insulation Reduced Operational Costs Improved Equipment Performance Safer Work Environment

Fundamental Principles HEAT FLOW Temperature = 300 F Temperature = 35 F We all know how heat transfer works. The important question for us to ask is how to calculate it.

What can we change to Reduce Losses Conductive Heat Loss = Thermal Conductivity x Area x (Air Temp – Surface Temp) Convective Heat Loss = Convection Coefficient x Area x (Air Temp – Surface Temp) Radiative Heat Loss = Emissivity x Stefan-Boltzmann Constant x Area x (Environmental Temp 4 – Surface Temp 4 ) Constants don’t change. Material and physical properties are difficult to influence. We cannot directly change surface area without changing equipment. It is unlikely that we would/could change space temperature. Through the application of insulation we can change the surface temperature.

Common Opportunities  Chilled Water Pipes  Hot Water Pipes  Steam Distribution Pipes  Condensate Tanks  Boilers  Injection Mold Machines  Holding tanks for conditioned fluids  Heat Treat Ovens  Low Temperature Storage

Identification Tools Common tools to use in identifying opportunities Infrared Thermometers Infrared Camera \$1,000 - \$8,000+\$10 - \$500

Calculating Savings Software Make Calculations Manually

Quantifying your Insulation Opportunities Process:  Step 1: Collect Your Data  Using our data collection sheet collect the information necessary for calculating savings  Step 2: Submit Your Data  Using the google survey we have created, submit your data to Go Sustainable Energy  Step 3: Go Sustainable Energy Calculates Your Savings  We have developed a tool to streamline opportunity calculations  Step 4: Receive savings opportunity Report  We will send you a report which captures each savings opportunity you submit.  Step 5: Utilize report to take action and start saving.

Information Needed to Quantify Energy Savings To provide savings estimates for insulation opportunities the following information is needed:  Size of the surface to be insulated (length, width, height in feet)  Environmental temperature  Surface Emissivity: describe the surface (i.e. galvanized steel, Schedule 40 pipe, etc.)  Surface Temperature  Internal temperature (set point for holding tank, cold/hot water, etc)  Proposed insulation thickness  Proposed insulation R-Value

Data Collection Sheet

Rebate Potential  Example  Electric – AEP Ohio: Custom Rebate of \$0.08/kWh Project payback between one and seven years Up to 50% of implementation cost  Natural Gas – Columbia Gas of Ohio Up-to 50% of implementation cost Project Savings Investment Ration (SIR) > 1 Typically most insulation projects have SIR > 1

Case Study #1 - Gas  Insulate Boiler Shell, Steam Pipes, and Condensate Return Tank

Case Study #2 - Gas  Insulate Steam Pipe

Case Study #3 - Gas  Insulate Boiler and De-aerator Tank

Case Study #4 - Elec  Insulate Melting Furnace

Case Studies Summary From our experience:  Insulate surfaces with temperatures above 140 F for safety and savings  Paybacks generally average about 3 years  Rebates are currently available…

Questions Thanks for attending the presentation today. We plan to make the entirety of the recorded webinar available online. If you have any further questions or require technical assistance with energy efficiency please contact any of our staff. Online: www.gosustainableenergy.com Phone: 614.268.4263

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