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Financial optimization and design of hybrid ground-coupled heat pump systems

Author:
Hénault, Benjamin   Pasquier, Philippe   Kummert, Micha?l  


Journal:
Applied Thermal Engineering


Issue Date:
2016


Abstract(summary):

Highlights

Optimization-based design improves the net present value of Hy-GCHP systems.

The approach integrates six design and operation parameters.

Fine tuning some parameters can significantly improve financial performances.

Hybrid systems can reduce significantly energy consumption and peak electrical load.

Abstract

A strategy to optimize the net present value of a hybrid ground-coupled heat pump system is presented. The method relies on a spectral-based simulation tool that predicts the heat pump performance on an hourly basis and on a optimization algorithm. The approach considers the project financial parameters, the hourly thermal load of the building, the pumping energy, the control strategy, the design fluid temperature of the heat pumps, the ground thermal properties, the footprint available for the ground heat exchanger, the local construction and equipment costs as well as complex electricity rates such as demand charges and energy. The proposed method gives the optimal number and location of the vertical boreholes, the number of required heat pumps and their operating temperature limits as well as the optimal energy savings generated by the ground-coupled heat pump system. Results indicate that fine tuning some design parameters such as the number of boreholes and installed heat pumps or the temperature limit in heating mode can significantly improve the financial performance of a project. Additionally, results confirm that use of hybrid systems could reduce significantly the electrical consumption and peak electrical load of a building.



Page:
72-82


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