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EXPERIMENTAL UNDERGROUND PUMP-
STORAGE HYDROELECTRIC INSTALLATION IN MINE
IN THE CZECH REPUBLIC
European Workshop
on Underground Energy Storage,
8th November 2019, Paris
The device was developed with the support of financial contribution
received from The Ministry of Industry and Trade
of the Czech Republic.
ROBOTSYSTEM COMPANY
ROBOTSYSTEM, s.r.o. is a highly creative research and realisation company – "private research institute" in the field
of mechatronics and robotics.
ROBOTSYSTEM, s.r.o. cooperates within the consortium of research companies – SLEZSKÁ MECHATRONIKA a.s. and
MORAVSKÝ VÝZKUM, s.r.o. - 30 employees in total (in particular mechanical and electrical engineers, and
programmers).
FIELDS OF RESEARCH AND DEVELOPMENT:
Service robotics and logistics (Industry 4.0) – robotic omnidirectional autonomous platforms, robotic manipulators,
collaborative robots
Robotic technologies for transport and manipulation of components and technological assemblies in high weight
categories – omnidirectional autonomous robotic platforms (modularity, transfiguration of partial blocks, remote or
programmable control), rail robotic autonomous electric platforms
Medical transport and rehabilitation technologies – assistive medical robots for partly of fully immobile patients
Unmanned robotic processes in the field of nuclear energetics – robotic electric platforms for logistics processes
in the underground areas of deep geological repository, gripping and handling multifunctional robotic effectors for
manipulation with disposal casks with spent nuclear fuel
Robotic rescue and emergency technologies – autonomous rescue platforms and special vehicles with assisted
remote or programmable control, medical rescue mobile resuscitation ministation
UNDERGROUND PUMP-STORAGE POWER PLANT DESIGN DESCRIPTION
Near a dam or natural water tank (upper retention tank) – the ideal case
Set of the pump station with facilities located in constructed underground area with
a high head potential
Special deep lower retention tank (system in the axis parallelly placed underground
tunnels)
Advantages:
Possibility to build a pump-storage system in the landscape without height differences
Location of whole pump-storage system underground (no negative influence on surface
of the landscape), solution of underground pump-storage station is adapted to the
locality selected.
Building costs mostly lower in comparison to usual pumping surface systems requiring in
most of the cases of surface retention tanks constructions (e.g.: Dlouhe strane in the
Czech Republic – an inclined tunnel led underground parallelly with terrain inclination
to the turbine system located underground) – it always depends on overall conditions,
of course.
POTENTIAL UTILISATION / PILOT PROJECT
PILOT PROJECT
Former black coal mine - Jeremenko in Ostrava, Czech Republic
- Pelton turbine (600 kW power) – location selected based on appropriate
combination of flow, head and power.
- Source: mine salt water.
- Location: 580 m below surface.
- Connection to existing system of pumps for keeping stabile level of mine water
(outflow to Ostravice river 1.6 km far away from mine).
- Two collieries (the first one with surface retention tank and tunnel with Pelton
turbine and lower retention tank under turbine – connection to system
of underground tunnels and pumps in the second colliery for pumping the
water to surface, outflow pipe with valve to surface retention tank and control
system).
PILOT PROJECT – TECNICAL PARAMETRES
TECHNICAL SPECIFICATIONS OF THE TURBINE
Height 1185 mm
Width 825 mm
Length 2485 mm (with nozzle), 1105 mm (without
nozzle)
Nozzle diameter DN 200
Type of impeller Pelton impeller
Placement of impeller Fixed to the shaft of turbine casing (alternatively
overhung the shaft)
Diameter of impeller 580 mm (diameter of water jet impact ),
720 mm (maximum outer diameter of the
impeller)
Width of impeller blades 120 mm
Turbine weight 727.5 kg (without nozzle)
918 kg (with nozzle, without fluids)
Nominal revolutions 1500 RPM
Maximum continuous
revolutions 2490 RPM
Diameter of inlet pipe DN 300 (reduced before the main cap to DN 200)
Efficiency of turbine 89 - 91 %
Output and parametres according to the specific conditions arising from
the location of turbine
Turbine design according to the customer requirements (flip
upside, rectification mechanism, the orientation
of the turbine right / left, and other parameters)
Pelton turbine features:
the option of manual rectification of an axial
composition with the impeller in a horizontal
direction,
an innovative solution of the nozzle system,
spray rings,
and many other innovative options.
PILOT PROJECT
BASIC PARAMETRES OF THE PROPOSED HYDROELECTRIC
POWER STATION
Height of head 580 m
Maximum flow rate 0.12 m3/s
Maximum power 598 kW (639 kVA)
Optimal flow rate 0.1 m3/s
Optimal power 507 kW
Nominal voltage 500 V
Nominal current 737,9 A
Frequency 50 Hz
Protection IP 55
Connection Y / operating mode
– in parallel with grid
Large retention tank
– variant I
Testing
retention
tank
Retention tank
– variant II
Building of colliery nr. 1
Building of colliery nr. 3
OVERALL SURFACE LAYOUT SOLUTION OF THE SYSTEM
RETENTION TANKS - VARIANTS
Mixing
room
Connection
of piping
to the mine
colliery
Building
of colliery nr. 1
Mine colliery
Gravity pipe
system
Mine corridor
Lower
retention
tank
MINE PART OF PUMP-STORAGE POWER PLANT
MINING COLLIERY WITH CORRIDOR
Supply gravity
pipe system
Switchboard
Shut-off valve
with actuator
Anchor block
with
hydraulic
aggregate
Ventilation
subsystem
Hydraulic
aggregate
of nozzle
Turbine set
MINING CORRIDOR WITH MOUNTED TURBINE SET
MINE PART OF PUMP-STORAGE POWER PLANT
MINING CORRIDOR WITH MOUNTED TURBINE SET – FRONT VIEW
MINE PART OF PUMP-STORAGE POWER PLANT
MINING CORRIDOR WITH MOUNTED TURBINE SET - DETAIL
MINE PART OF PUMP-STORAGE POWER PLANT
PELTON TURBINE HOUSING
PELTON TURBINE HOUSING WITH NOZZLE AND FLEXIBLE COUPLING
PELTON TURBINE HOUSING
TURBINE SET
REALIZATION - PHOTOS
TURBINE SET
REALIZATION - PHOTOS
HYDRAULIC AGGREGATES AND GUIDERS
REALIZATION
INSTALLATION IN THE MINE
REALIZATION - PHOTOS
REALIZATION - PHOTOS
SUMMARY AND CONCLUSIONS
Successes – fast start within 120 – 140 s, turbine efficiency 89 – 91 %
Problems – the type of salt water in the locality has a negative inimpact on the steel construction which gradually degrade, especially in the part of guider, alternatively
there is a possible solution with utilisation of fiberglass pipeline – unavailable at the
time of project realisation.
Perspectives of further utilisation (studies)
Subsequent underground pump-storage power plant close to a dam – for
example the Lipno dam (suitable type of mountain massif, with pump volume of 5 – 10 mil. m3 of water, with Francis turbines with power of 2x 150 MW to 2x 300 MW –
establishment of significant energy store) – to a greater extent
Dolni Rozinka – a former underground uranium mine (Pelton turbine) features the same power as in the case of Jeremenko mine.
UNDERGROUND BLOCK OF PARALEL TUNNELS OF RETENTION TANK WITH ORIENTATION TO TURBINE ENERGETIC BLOCK – LIPNO
THANK YOU FOR YOUR ATTENTION
DAVID PAWERA
Project Manager
Phone: +420 774 031 339
E-mail: [email protected]
ROBOTSYSTEM, s.r.o.
Havlickovo nabrezi 2728/38, 702 00 Ostrava
CZECH REPUBLIC
www.robotsystem.cz
