Abstract
Vertical Ground-Coupled Heat Pump (VGCHP) systems are a green and sustainable alternative to conventional heating, ventilating, and air-conditioning systems. However, their main drawback is the high initial installation cost of the Vertical Ground Heat Exchanger (VGHE), which has hindered their widespread adoption. Improving the performance of VGCHP to reduce their installation and operating costs requires a comprehensive study that scrutinizes the long-term effects of various involving parameters on the performance of the system. This contribution presents a comprehensive study investigating various influential factors, including climate type, refrigerant type, borehole depth, and type of compressor and circulating pump, on the VGCHP system performance. For this aim, a detailed model of the VGCHP is developed that includes detailed heat pump modeling, fast and accurate VGHE analytical modeling, and recommended constraints of the ASHRAE standard. The developed heat pump model is compatible with both pure and refrigerant mixtures. The five-year operation of 180 cases is simulated. Based on five-year simulation results and sensitivity analysis, 90 cases are selected, and their 20-year operation is investigated. The results demonstrated that the heat pump type is the most influential parameter on the Coefficient of Performance (COP), and the climate type is the most influential parameter on the maximum thermal load provided to the building per VGHE unit length. Moreover, optimum design parameters are determined based on short- and long-term simulation results. Furthermore, the response surface method is implemented to develop predictive equations for COP and maximum thermal load as a function of influential factors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
