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Efficient use of energy wells for heat pumps (completed)

EFFSYS2 is a Swedish research program, which started in 2006 until 2010. EFFSYS2 is the continuation of the earlier research programs “Alternativa köldmedier”, “Klimat 21″ and “eff-sys” that were first started back in 1994. These research programs have been very successful and have brought Sweden to the front of international research in the area of refrigeration and heat pumps.

Nowadays, Swedish research institutes have a strong international position in the area of refrigeration and heat pump technologies. This position shall be maintained and the research shall continue to develop in cooperation with the industry. This is a step in the switch towards a more sustainable and resource efficient society.

Our Project

The scope of our research activity within EFFSYS2 was on "Efficient use of energy wells for heat pumps"

Summary

The project aims to develop recommendations for the design and installation of collectors in boreholes for heat pumps. Several aspects are covered:

  1. Mapping of short circuit effects (internal heat transfer) of the collector and the methods to avoid these.
  2. Investigation of the performance of various embodiments of the collectors.
  3. Mapping of methods to ensure turbulent flow without causing unnecessarily high pump powers, ie the optimization of the flow.
  4. Identification of impact on the performance and cost of performing the drill hole / holes.
  5. Investigation of the heat absorption of two-phase thermosiphon (natural circulation).
  6. Investigation of the dynamic interaction between the heat transfer in the collector / borehole and heat conduction in the surrounding rock.
  7. Investigation of the effect of the re-storage of different types of energy wells.

You can find further information about this project in this section. 

Conference and Journal publications resulted from our investigation can be found in Publications .

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)