Sewage Heat Recovery in Cologne Sewer Systems ......17th International EWA Symposium “Water,...
Transcript of Sewage Heat Recovery in Cologne Sewer Systems ......17th International EWA Symposium “Water,...
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
Sewage Heat Recovery
in Cologne Sewer Systems –
Experiences of a Sewerage Company
Dipl.-Ing. Michael Knippenberg
Cologne Sewerage Company
Planning and Construction Sewer Systems
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17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Overview
» Demonstration projects
» Mapping heat resources
» Wastewater disposal in Cologne
» EU Project CELSIUS
» Lessons learned
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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» Combined Efficient Large-Scale Integrated
Urban Systems
EU project CELSIUS
http://www.celsiuscity.eu
Ph
oto
by Ild
ar S
ag
de
jev
» „ …will enable the capture and utilization of the
secondary energy that is generated within cities every
day and that is otherwise lost to the atmosphere”
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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CELSIUS partners
» Gothenburg, Sweden
» Cologne, Germany
» Genoa, Italy
» London, United Kingdom
» Rotterdam, Netherlands So
urc
e: c
om
mo
ns.w
ikim
ed
ia.o
rg
“ …CELSIUS demonstrates
and promotes integration of
smart district heating and
smart district cooling.” (www.celsiuscity.eu)
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Examples of demonstrators
» “…a package of innovative state-of-the-art energy
efficient technologies, systems and practices.” (www.celsiuscity.eu)
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Wastewater disposal in Cologne
WWTP
WWTP
WWTP
WWTP
WWTP
» 94 % combined sewers
» 155 km2 drained area
» 5 treatment plants
» 1 million inhabitants
» 2,400 km sewers in total
» 153 pumping stations
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Wastewater temperature (yearly average)
10,0
12,0
14,0
16,0
18,0
20,0
22,0
24,0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan
Waste
wate
r te
mp
era
ture
[°C
]
Time
2011
2012
2013
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Mapping heat resources
min. flowrate 10 l/s
min. width 600 mm
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Mapping heat resources
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Project partners in Cologne
Photo by Andreas Tille
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
• Many types of
buildings
• Various kinds of usage
• Heat from various
fluids
• Heating and cooling
Phase 3:
Integration
• Further types of
buildings
• Various kinds of
usage
• Heat from sewage
• Heating and
possibly cooling
Phase 2:
Expansion
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Objective for CELSIUS in Cologne
time
sta
ges o
f d
evelo
pm
en
t
Source: derived from RheinEnergie 2012
• Homogenous
types and usage
of buildings
• Heat from sewage
• Heating
Phase 1:
Innovation
we are here now
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Heat utilisation
Source: Advisory Guideline DWA-M 114E
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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» Monovalent system
Covers the whole heat output requirement
Has to be approx. 5-10 times bigger than a…
Bivalent plants: economic and safe
» …Bivalent system
Heat pump provides the base load
Gas boiler is installed for peak requirements
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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First CELSIUS sites in Cologne (March 2014)
District of Wahn
Area: 21,650 m2
Heat pump: 200 kW
Gas boiler: 1,000 kW
District of Mülheim
Area: 12,800 m2
Heat pump: 150 kW
Gas boiler: 850 kW
District of Nippes
Area: 28,200 m2
Heat pump: 400 kW
Gas boiler: 2,100 kW
District of
Weidenpesch
Negotiation with the
Cologne fire department
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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» Up to 38 percent
Expected savings of primary energy
for the first three locations in Cologne
» Corresponding CO2-reduction:
about 540 tonnes p.a. So
urc
e: c
om
mo
ns.w
ikim
ed
ia.o
rg
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Construction site (secondary school in Wahn)
Location of the
heat exchanger
Location of the
heat pump
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Inlet and return flow positioned in a manhole
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Construction site (near high school in Mülheim)
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Perfectly designed for dry weather flow
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Sewage out of a pumping station („off-line“)
Major pumping
station
Heat recovery
plant
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Lessons learned (I)
» A feasibility study is indispensable
» Designing a heat exchanger needs flow measurement
» Pipes of less than 800 mm can be considered
» Mapping heat resources enables spatial analysis
» Approval of the water authority takes time
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Lessons learned (II)
» Special requirements for sewer cleaning
» Sewer rehabilitation has always to be possible
» Use simple water as heat transfer medium
» Sharing of information accelerates planning
» For accident prevention a railing is recommended
17th International EWA Symposium “Water, Energy and Resources: Innovative Options and Sustainable Solutions”
Munich, Germany, 6-7 May 2014
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Thank you for your attention!
Source: Gemeinnützige Gesellschaft des Kölner Karnevals mbH
gas – heat -
exchanger