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Breakout Sessions

Geothermal Hybrid System Economic

Geothermal systems have proven to be a viable means to reduce energy consumption and carbon footprint for buildings or campus systems. The application of geothermal systems has been largely restricted to new building or projects where the entire HVAC system is being replaced. The design and installation of hybrid systems that marry conventional boiler and chiller equipment with geothermal, allows for the optimal operation of both with significantly lower initial capital cost. The presentation will be a case study of two projects with a head to head economic comparison of a 100% geo approach versus a hybrid mixing conventional boilers, chillers and geothermal. One project is the replacement of HVAC system for a High School in northern Iowa. The second is the phased conversion of a small University campus. The design areas covered include: Annual Thermal Profile, Well Field Sizing, Capital Cost Variance Between Systems, Annual Energy Cost, Annual Energy Footprint, Annual Carbon Footprint and Simple Payback.

1. Participants will gain an understanding of the design potential for hybrid systems will dramatically increase the effective use of geothermal heating and cooling systems.
2. Participants will learn how a facility can go geothermal and it does not need to be a whole sale replacement but can be a transition over time.
3. Participants will discuss the knowing the facilities thermal profile has a tremendous impact on the economics for the application of geothermal systems and how to point you toward a hybrid system approach.

Lee Tapper, MEP Associates, Inc.