Improvements in Design Procedures for Ground Source and Hybrid Ground Source Heat Pump Systems
Abstract
This study focuses on improvements made in design procedures for ground source and hybrid ground source heat pump systems. Revisions were made to a ground source heat pump system design tool that allow for more accurate simulations without sacrificing computation time. Additionally, a new methodology to best approximate the magnitude and duration of peak heating and cooling loads for monthly design simulations is introduced, as is an algorithm for determining the optimum hybrid ground source heat pump system design (both ground loop and supplemental device sizes). Finally, the ground source heat pump simulation and design tool is validated against eighteen months of experimental data. The new additions to the ground source heat pump design tool allow for accurate simulation of a much wider variety of systems than has previously been available. When validated against an hourly simulation, the peak load approximation technique performs well, showing better guidance for selection of the peak load. The hybrid ground source heat pump design algorithm outperforms the method available in the literature, and compares favorably to a cost-optimized design procedure, especially when computation time is taken into account. Finally, the validation of the ground source heat pump design tool shows that it is accurate enough for design purposes, although more refinement is undoubtedly needed.
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- OSU Theses [15752]