Presentation on theme: "Calculating Efficiency Opportunities in Insulation Workgroup Meeting May 2014 Charlie Schreier, PE Engineer."— Presentation transcript:
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
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 #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