KTH och geoenergi www.energy.kth.se/energibrunnar Borrhålslager Alberto Lazzarotto, Post doc Patricia Monzó, doktorand Djupa borrhålsvärmeväxlare Willem Mazzotti, doktorand Björn Palm, Professor Köldbärarvätskor Monika Ignatowicz Styrning Davide Rolando, post doc Akviferlager Mohammad Abuasbeh, doktorand Hybridsystem (sol+geo) Nelson Sommerfeldt, doktorand Joachim Claesson, Docent Hatef Madani, Bit. Lektor
Deep and Coaxial Borehole Heat Exchangers for Ground Source Heat Pumps Depth [m] Aim: Identify advantages/drawbacks link to the use of deep and coaxial borehole heat exchangers 0-100 Temperature [ C] -200-300 -400-500 Willem Mazzotti mazzotti@kth.se -600-700 -800 Stockholm 510 m Uppsala 340 m Asker - 800 m
Modellering och uppföljning av stort borrhålslager
Partners Solhybrid AB BRF Moranvikan BRF Timmermannen 2
Aquifer Thermal Energy Storage: an insight into the Future Mohammad Abuasbeh, PhD candidate José Acuña, Project leader KTH Royal Institute of Technology Gothenburg, 2016-10-21
Aquifer Thermal Energy Storage Cold well Temperature 3-12 ⁰ C Hot well Temperature 10-24 ⁰ C Advantages High capacity (high massflow rate) Low payback time (2-3 years) Negligible noise level Possibility for free cooling Higher SPF Disadvantages Extensive preparation period Long term permission Continuous maintainance Dependant on geological location Additional Heat exchanger
KTHs ATES project Four working packages Thermal, chemical and microbiological conditions evaluation of the ground Data collection and system operation monitoring Installation of the measuring equipment and the collection of water level and temperature data Calibration of thermal & groundwater models by using the measured data
Recent Activities Publication in Kyla+ magazine Poster presentation at EGU 2016 Meeting with project partners Preliminary heat tracing tests International collaboration with ORMEL & NGU, Norway
Measurement Facilities 1. Rosenborg 2. Lilla Klåveröd 3. ORMEL Norway 4. Gallerian
Rosenborg Rosenborg 3 & 4, 17 000 + 12 500 m2 Water extraction& infiltration: 50 l/sec Cooling power 700 & 800 kw Operational since March 2016 Owner: Vasakronan Rosenborg 3 Rosenborg 4 Brunnsviken
Rosenborg Heating and Cooling From Aquifer System Heat exchangers 3-4 Warm wells 2 Cold wells
Rosenborg Well measurement instruments Observation well and sensors Insulated pipes
Rosenborg Heat exchanger measurement instruments Insulated heat exchangers Temperature sensors + Waterflow meter = Energy flow meter
Rosenborg Siemens heating and cooling system data & control Data collection Temperature Waterflow Pressure Waterlevel Siemens monitoring program
Rosenborg Data visualization tool using Matlab
Rosenborg Fiber optic cables planning for installation
Distributed Temperature Sensing DTS DTS Instrument DTS Instrument T 1 T 2 T 3 T 4. T n-1 T n www.svepinfo.se www.pemtec.se
First Heat Tracing Experiment in Aquifer and Borehole
Equipment Test in Borehole
Heat tracing: Equipment Tests in Aquifer
Preliminary results Heat supply 200 W. Well not in operation Assumed horizontal flow Forced convection correlation Calculated groundwater velocity Higher power needed
Groundwater and heat flow modelling Hydraulic parameters are calibrated today based on pumping tests Thermal parameters are guessed based on literature There are rarely possibilities to calibrate models Collaboration with ORMEL FEFLOW and MODFLOW
Groundwater sampling Test 1: North to South Water flow about 40 l/s Test 2: South to North
Some Sampling Results
Lilla Klåveröd
International Collaboration ORMEL Norway ORMEL Optimum utilization of groundwater for heating and cooling in Melhus and Elverum Drilling program in Elverum Groundwater and thermal modelling (FEFLOW & MODFLOW) Data analysis and system design
Investigation Drilling Program in Elverum
Investigation Drilling Program in Elverum Drilling 9 observation wells to gather information about the sediment and water infiltration rate along the depth in collaboration with: NGU, NTNU, Elverum municipality, KTH
Investigation Drilling Program in Elverum Resultant information Data from drilling rig Visual Water infeltration rate
Installed diver for data collection Example of resultant profile along the depth
Thanks for listening! www.energy.kth.se/energibrunnar