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Efficient design of geothermal heating systems (completed)

EFFSYS+ is the continuation of the earlier research programs “Alternativa köldmedier”, “Klimat 21″, “eff-sys” and “Effsys2″. Energy efficient, user-friendly and sustainable technology shall be developed and resource efficient solutions shall be detected. The vision of EFFSYS+ is to contribute to the development of Swedish industry into an international front position within the area of refrigeration and heat pump technologies. 

Our Project

Our research activity is focused on "Efficient design of geothermal heating systems and implications of EFFSYS2 results".

The project intends to study and improve the performance on the source side of ground source heat pumps based on earlier results from the EFFSYS2 project, though including new aspects:

  1. Distributed Thermal Response Test – implications for different collector designs
  2. Evaluation of technical and practical implications of exchanging existing borehole heat exchangers to new more effective designs
  3. Evaluation of yet more borehole heat exchanger designs, new geometries, new collector materials, and filling materials
  4. Evaluation of volumetric flow rate optimization for given local borehole depths and ground temperature profiles.
  5. Investigation of the possibilities for minimizing antifreeze concentration in the secondary fluid, using water as secondary fluid, and potassium carbonate as secondary fluid
  6. Evaluation of natural convection, forced convection, and freezing of groundwater filled boreholes
  7. Development of a control software for ensuring the optimum volumetric flow rate in each borehole heat exchanger at different operating conditions. Implications of this on the system design
  8. Modeling of heat extraction and fluid dynamics in a U-pipe thermosiphon borehole heat exchanger
  9. Evaluation of re-charging energy wells
  10. Investigation of taking advantage of the ground temperature gradient for increased efficiency
  11. Investigation of variation of thermal conductivity along the depth a some selected places around the country
  12. Evaluation of different grouting material and its thermal and practical implications

Further information about this EFFSYS+ project can be found in this section. Relevant results are published in conferences and scientific journals, follow this link Publications  to access them.

Page responsible:Oxana Samoteeva
Belongs to: Energy Technology
Last changed: Sep 16, 2022
Experimental investigations to maximize efficiency of CO2 vapor compression systems
Sustainable Geothermal Energy for the Future: AI in ATES
Warm water systems, losses and Legionella
PARMENIDES – Plug & plAy EneRgy ManagEmeNt for hybriD Energy Storage
HYSTORE - Hybrid services from advanced thermal energy storage systems
Open-source models for holistic building energy system design at scale
Tank to Grave Management of new Low-GWP Refrigerants (Hantering av nya låg-GWP köldmedier från installation till destruktion)
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
Control systems for hybrid solutions based on biomass fueled Stirling engines, solar and wind for rural electrification
Prosumer-Centric Communication for Solar PV Diffusion (completed)
Towards Sustainable (Fossil-free) Heating System in Small Residential Buildings
Solar energy and ground source heat pumps for Swedish multi-family housing (completed)
Solar photovoltaic systems in Swedish cooperative housing (completed)
Smart Control Strategies for Heat Pump Systems (completed)
Creating and Understanding Smart Innovation in Cities
Building heating solutions in China
Accelerating innovation in buildings
High-Resolution GIS District Heating Source-Load Mapping
Digitalization and IoT technologies for Heat Pump systems
Sustainable combined systems for heating of buildings (completed)
Cost- and Energy-Efficient Control Systems for Buildings
Situation of Opportunity in the Growth and Change of three Stockholm City Districts (completed)
Wuxi Sino-Swedish Eco-City Project (completed)
Smart Renovation Strategies for Sustainable Electrification
Future Secondary Fluids for indirect refrigeration systems
Smart Fault Detection and Diagnosis for Heat Pumps
Performance indicators for energy efficient supermarket buildings
Magnetic Refrigeration
High-Resolution GIS District Heating Source-Load Mapping
Smart Solar Hybrid Solutions for Sustainable European Buildings (completed)
Building state-of-the-art (SotA) supermarket: Putting theory into practice
Efficient utilization of industrial waste heat by low temperature heat driven power cycles – an integrated approach for Swedish Industry
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
Functional surface coatings for energy efficient heat pumps
Two-phase flow in flat channels
Two phase heat transfer & pressure drop with new environment friendly refrigerants in minichannels (completed)
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
Building heating solutions in China
Toward Sustainable (Fossil-free) Heating System in Small Residential Buildings
Renewable Energy Park, RE-Park (completed)
Efficient use of energy wells for heat pumps (completed)
Efficient design of geothermal heating systems (completed)
SPF (completed)