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Deep Borehole Heat Exchanger (completed)

This project aimed to measure advantages and disadvantages of deep borehole heat exchangers as well as to propose design guidelines for multiple borehole fields with coaxial collectors.

EFFSYS EXPAND is a research program where industry, academia and government Energy Agency collaborate on research, development and innovation in resource-efficient refrigeration and heat pump systems, refrigeration and heat storage. The total budget amounts to 96 million kronor Energy Agency is contributing SEK 48 million. The program runs over the period 2014-09-01 to 2018-09-01.

EFFSYS EXPAND is a continuation of the previous programs "Alternative refrigerants", "Air 21", "eff-Sys", "Effsys2" and EFFSYS + which together running since 1994. The overall aim of the program is research, development and innovation in refrigeration and heat pump systems as well as cooling and heating bearings contribute to society and the outside world's transition to a more resource-efficient and sustainable energy use and the reduction of environmentally harmful substances in thermal storage and heat pump systems.

Our Project

Brief description

This project intends to measure advantages and disadvantages of deep borehole heat exchangers as well as to propose design guidelines for multiple borehole fields with coaxial collectors. The following aspects are covered:


- Evaluation of advantages and disadvantages with existing and new projects where deep borehole heat exchangers are or can be used.
- Development of a design method for multiple borehole fields using coaxial heat exchangers and special connections with HVAC systems.
- Quantification of thermal influence between neighbor systems with shallow and deep boreholes, hypothetical and factual scenarios with and without coaxial collectors
- Installation and experimental evaluation of deep borehole heat exchangers
- Laboratory model of ground storage in shallow and deep boreholes

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Sustainable Geothermal Energy for the Future: AI in ATES
Warm water systems, losses and Legionella
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HYSTORE - Hybrid services from advanced thermal energy storage systems
Open-source models for holistic building energy system design at scale
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Novel tool and guidelines for designing ground source heat pumps (GSHPs) in densely populated areas
Data driven lab for building energy systems
Long-term performance measurement of GSHP systems serving commercial, institutional and multi-family buildings
Open-source models for holistic building energy system design at scale
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Smart Control Strategies for Heat Pump Systems (completed)
Creating and Understanding Smart Innovation in Cities
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High-Resolution GIS District Heating Source-Load Mapping
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Cooperation between Supermarkets and Real Estate Owners; Energy Efficiency and Business Models
Digitalization and IoT technologies for Heat Pump systems
Capacity control in Heat Pump systems
Alternative secondary fluids
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Numerical Study on flow boiling in micro/mini channels (completed)
Distributed Cold Storages in District Cooling
Integrating Latent Heat Storage into Residential Heating Systems
Simulation of temperature distribution in borehole thermal storages supported by fiber optic temperature measurements (completed)
Solar energy and ground source heat pumps for Swedish multi-family housing (completed)
Neutrons for Heat Storage, NHS, (completed)
4D Monitoring of BTES (completed)
Aquifer Thermal Energy Storage (completed)
Deep Borehole Heat Exchanger (completed)
Combined Heat and Power plants in combination with borehole thermal energy storage (completed)
Improved borehole technology for Geothermal Heat Pumps development (completed)
Compact Minichannel Latent Energy Storage for Air Related Cold Storage Applications
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SPF (completed)