Determination of aquifer hydrodynamic parameters: a key tool for the design of an Open-loop Groundwater Heat Pump System

2016 ◽  
Vol 41 ◽  
pp. 288-291
Author(s):  
Glenda Taddia ◽  
Elena Abdin ◽  
Stefano Lo Russo
Keyword(s):  
Heat Pump ◽  
Open Loop ◽  
Pump System ◽  
Heat Pump System ◽  
Hydrodynamic Parameters ◽  
Groundwater Heat Pump

Determination of optimal well locations and pumping/injection rates for groundwater heat pump system

Geothermics ◽  
2021 ◽  
Vol 92 ◽  
pp. 102050
Author(s):  
Dongkyu Park ◽  
Eunhee Lee ◽  
Dugin Kaown ◽  
Seong-Sun Lee ◽  
Kang-Kun Lee
Keyword(s):  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Groundwater Heat Pump ◽  
Injection Rates

Evaluation of measures to improve the performance of an open loop ground source heat pump system in the chalk aquifer: a case study

2021 ◽  
pp. qjegh2021-074
Author(s):  
D. Birks ◽  
C. Adamson ◽  
M. G. Woods ◽  
G. Holmes
Keyword(s):  
Heat Pump ◽  
Cooling System ◽  
Specific Capacity ◽  
Open Loop ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Groundwater Heat Pump

A case study documenting the development of a groundwater-fed district heat network in Colchester, UK, is presented. The performance of an open loop groundwater heating and cooling system (also known as a ground source heat pump (GSHP)) is a function of the performance of individual boreholes and interactions between the boreholes. When performance does not meet its design capacity or decreases with time, various measures can be undertaken to improve either the performance of individual wells or the performance of the system as a whole.Output from the first exploration borehole was less than expected, placing the business case for the development in jeopardy. Consequently, refinements to the remainder of the drilling programme were implemented including three to improve the performance of individual wells and two to improve performance of the system in its entirety. Results of these refinements are presented and may be used to inform the design of new open loop groundwater heat pump systems (GSHPs) and/or the rehabilitation of existing systems that have experienced diminished performance.Yields from three wells drilled using the reverse circulation method were more than double those drilled with the direct water flush method. A significant improvement in the performance of abstraction wells due to reinjection was observed. Specific capacity in abstraction wells increased by c. 40% due to reinjection, where the distance between abstraction and reinjection locations was 535–717 m. Allowing an excess pressure of up to 0.2 MPa in the reinjection boreholes meant that reinjection could be achieved with fewer wells.Outputs from abstraction wells were not increased by extending the depth of boreholes from 135 to 200 m or implementing additional acid treatments.

scholarly journals Impact of Boundary Conditions on a Groundwater Heat Pump System Design in a Shallow and Thin Aquifer near the River

2017 ◽  
Vol 9 (5) ◽  
pp. 797 ◽  
Author(s):  
Longcang Shu ◽  
Rui Xiao ◽  
Zhonghui Wen ◽  
Yuezan Tao ◽  
Peigui Liu
Keyword(s):  
Boundary Conditions ◽  
System Design ◽  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Groundwater Heat Pump

scholarly journals Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3657 ◽  
Author(s):  
Sondre Gjengedal ◽  
Lars A. Stenvik ◽  
Pål-Tore S. Storli ◽  
Randi K. Ramstad ◽  
Bernt O. Hilmo ◽  
...  
Keyword(s):  
System Design ◽  
Heat Pump ◽  
Precipitation Reaction ◽  
Pump System ◽  
Heat Pump System ◽  
Traditional System ◽  
Heating And Cooling ◽  
Groundwater Heat Pump ◽  
Town Center ◽  
The Town

The utilization of groundwater heat pump systems is increasing in Norway, which are currently widely employed for heating and cooling applications in the town center of Melhus. The investigations of the Melhus installations are detecting gas exsolution as a possible trigger for precipitation reaction that causes incrustation of iron and manganese compounds in the systems. This paper discusses risks associated with gas exsolution and considers gas exsolution triggers in a typical Norwegian groundwater heat pump (GWHP) system configuration. The concept of the solubility grade line (SGL) is developed and suggested as a tool for optimizing the design. Based on SGL analysis and the intention of avoiding gas exsolution during heat production, an alternative system design in the same aquifer is presented and compared. The analyses show that the traditional system design is predisposed to gas clogging risks and prone to vacuum pressures in parts of the system. The alternative design mediates the risks by adjusting the well and piping configuration and by applying a backpressure technique. The results demonstrate how the groundwater heat pump system design can be customized according to local aquifer conditions to avoid gas exsolution during operation. It is recommended that the presented method of analysis should be utilized in dimensioning of systems and included in the monitoring scheme of the systems.

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