Energy-Efficiency-Contracting: Example: University of Cologne - Oliver Diehl, Köln
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Energy-Efficiency-Contracting: Example: University of Cologne Oliver Diehl, Köln Konferenz: Energieeffizienzmarkt und -dienstleistungen in Deutschland und Frankreich Di. 6. März 2018 - Berlin
AGENDA
Chapter 1 Motivation for energy-efficiency-contracting
Chapter 2 How does energy-efficiency-contracting work?
An example of energy-efficiency-contracting:
Chapter 3 University of Cologne - BioZ
Motivation for energy-efficiency-contracting
Reasons for energetic renovation
Technology and facade are in need of renovation
High energy costs
Legal requirements:
• ENEV
• e.g. energetic inspection for HVAC and cooling systems
• Energy management - DIN EN ISO 50.001
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 4
energy renovation: customer aims
low
investment
cost
sustainability
low
operating cost
simple low
energy
consumption
Optimal building / facility
increased low
comfort / care expenses
safety
high
availability
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 5
Process of a common renovation process
selection of one
planning tender offer & implementation
idea or more
process award / construction
planners
Planners & technical trades, that usually work together during an
energy renovation project:
• HVAC, sanitary engineering
• electric
• control
• structural engineer
• construction services
• fire protection
• Other topics / reviewers
Many individual trades / partners that need to be coordinated
Project controller or general planner
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 6
Technical interfaces during a usual planning process
Evaluation of the situation:
• Bad documentation
• Not all piping / cable route can be inspected
• assumptions to be made at certain points
Technical coordination of the individual trades, during the planning phase or
execution phase is difficult.
After putting-into-operation:
Both, planners and executing companies, usually abandon the site after approval
and final invoice.
There is no re-optimization of the system !!
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 7
Where do the individual participants earn their money?
Planner / project controller
• %-rate of investment / lump sum
• additional services
Executive ev. Building
• construction of the plant
• supplements
• usage of alternative products
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 8
How does energy-efficiency- contracting work?
James Watt: father of energy-efficiency-contracting
The basic idea of energy service contracting can
be attributed to James Watt, inventor and
mechanical engineer .
To market his steam engine, his strategy was not
to sell it, but to make it available only for hire.
He guaranteed his customers that the cost using
his steam engine would not exceed the cost of
their cattle/horse feed.
This basic idea is the principle of so-called
energy-efficiency-contracting.
(James Watt, 1736 - 1819)
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 10Goals and characteristics of energy-efficiency-contracting
600.000
Laufzeit Contracting
Energiekosten
Nettoenergiekosten [€/a]
500.000
Haushaltsentlastung
400.000 des Kunden
300.000 Refinanzierung der
Investition
200.000 Betriebs- und
Brennstoffkosten
100.000
IST-Kosten
0
2013 2014 2015 2016 2017 2018 2019 2020
Zeitverlauf [a]
Investitionszeitpunkt des Übergabe an den Kunden
Contractors
Immediate budget relief right from the beginning of the contract
Another increase of savings after the end of contracting due to the elimination
of the contracting rate
11
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 11Expiration of a energy-efficiency-contracting
Selection of an
Implementation /
idea ESCo rough analysis detailed analysis savings phase
construction
consultant
ESCo-consultant
• Create a baseline
• Create a very rough inventory
• Determine mandatory measure
Rough analysis
• competition phase
• Competition of different savings concepts?
Target determination of the concept with the highest utility value
(profitability) for the customer
detailed analysis / construction / savings phase
• a contractor is responsible for planning, implementation and achieving
savings (guarantee).
• Energetically optimal operation of the plant / building.
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 12Our approach
savings phase
• financing
implementation • monitoring
• reduction
• planning certificate
• realization
detailed
analysis
rough
analysis
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 13Advantages of the energy-efficiency-contracting
• Fixed costs over the contract period
savings
• Guaranteed savings
guarantee
• Competition in the rough analysis determines the most economical concept for the
customer
Most economical
• No "unnecessary" investments
concept • Full cost analysis (maintenance and service included)
• Planning and implementation from a single source
• Full responsibility of the contractor over all cycles of the ESCo
Fewer interfaces
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 14Example of a energy-efficiency- contracting: University of Cologne - BioZ
Baseline
Kosten
2013 Einheit Menge Baseline
je Einheit
Fernwärme (Arbeit gesamt - 2013) MWh 2.900,0 66,5430 EUR 192.974,70 EUR
Strom (Arbeit gesamt - 2013) MWh 8.389,4 146,7305 EUR 1.230.981,15 EUR
Gesamtkosten 1.423.955,85 EUR
Specific consumption:
main floor space: 14.800 m²
- Heat: 195,9 kWh/m²xa
- electricity: 566,9 kWh/m²xaoffer data
FA FA
Angebots-
mit LED-Technik ohne LED-Technik
übersicht (Pflanzen) (Pflanzen)
Basisverbrauch: 1.423.809,12 €/a 1.423.809,12 €/a
Einspargarantie: 560.199,40 €/a 39,35% 491.943,52 €/a 34,55%
Haushaltsentlastung Kunde: 89.285,31 €/a 15,94% 118.339,98 €/a 24,06%
Contractingrate: 470.914,09 €/a 84,06% 373.603,54 €/a 75,94%
Kaufpreis: 3.044.603,55 € 2.356.741,69 €
davon Planung / Engineering 371.760,00 € 12,2% 337.920,00 € 14,3%
davon Technische Geräte, Anlagen, Sachen 2.672.843,55 € 87,8% 2.018.821,69 € 85,7%
Statischer ROI (Kaufpreis/Einspargarantie): 5,43 Jahre 4,79 Jahre
Vertragslaufzeit: 10,0 Jahre 10,0 Jahre
Überschießende Einsparung: 50,0 % (AG) 50,0 % (AG)offer data
Energien
Zusammenfassung
Energien Basis ESC Einsparung
Arbeit Leistung Arbeit Leistung Arbeit Leistung
Fernwärme 2.900,0 MWh/a - kW 1.572,9 MWh/a - kW 1.327,1 MWh/a 45,8% - kW
Strom 8.389,4 MWh/a - kW 5.173,4 MWh/a - kW 3.216,0 MWh/a 38,3% - kW
Kosten (Preisbasis 2013)
Zusammenfassung
Kosten Basis ESC Einsparung
Arbeit Leistung Summe Arbeit Leistung Summe Arbeit Gesamt
Fernwärme 192.975 €/a - €/a 192.975 €/a 104.668 €/a - €/a 104.668 €/a 88.307 €/a 45,8% 88.307 €/a 45,8%
Strom 1.230.981 €/a - €/a 1.230.981 €/a 759.089 €/a - €/a 759.089 €/a 471.893 €/a 38,3% 471.893 €/a 38,3%
Summe 1.423.956 €/a - €/a 1.423.956 €/a 863.756 €/a - €/a 863.756 €/a 560.199 €/a 39,3% 560.199 €/a 39,3%
CO2 CO2-Äquivalente Einsparung CO2-Minderung
Minderung t/MWh MWh/a t/a
Elektroenergie 0,57636 3.216,0 1.853,6
Fernwärme 0,219 1.327,1 290,6
Summe: 2.144,2 39,2% C02-savingfresh air intake
tender:
─ Installation of two new intake towers
1 Position Ort Geschwindigkeit ∆p
1 Wetterschutzgitter 2,4 m/s 32 Pa
2 Filterwand 2,3 m/s 90 Pa
3 Kanal links 9,5 m/s 124 Pa
4 Kanal rechts 7,5 m/s 75 Pa
2
3 4Digestories - daytime operation
daytime operation 8-times * air change
Operation via timer program 8:00 - 18:00 o'clock
Additionally: Presence detector installation, if present above time schedual
Tagbetrieb Abluft 480 m³/h
ERR
8/4-facher
Luftwechsel Abluft 50 m³/h
Zuluft 480 m³/h
Dauer EIN ZSP
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 20Digestories - nighttime operation
Time switch program / presence detector inactive => halves the air exchange
Interlocking alarm message Digestories
Nachtbetrieb - abgesenkt Abluft 240 m³/h
ERR
2/4-facher
Luftwechsel Abluft 50 m³/h
Zuluft 240 m³/h
Dauer EIN ZSP Verriegelung
Alarmmeldung
06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 21Optimization of refrigeration
KM 1:
– Quantum X120
Installation of magnetically-levated turbocompressor – 1000 kW cooling capacity
(Quantum X120) + Free cooling
KM 2:
– Carrier 30HXC345.133
Trockenrückkühler – 1000 kW cooling capacity
Free cooling:
6+7 4+5 1+2+3 – Change at outside temperature
< 4°C
– 200 kW cooling capacity
Recooling plants:
– 7 dry coolers
– Condensation capacity: 2516 kW
Verteiler Sammler
KM1 KM2 Puffer-
speicher
Carrier
WT
Glykol/
Quantum
Wasserbuilding lighting Installation of modern LED technology on a total of 1,737 lights
plant lighting
Projekt des Monats der EnergieAgentur NRW (März 2018)
http://www.energieagentur.nrw/eanrw/energieverbrauch_reduziert_biozentrum_der_uni_koeln_spart_500.000_euro_pro_jahr
Energieverbrauch
06.03.2018
reduziert – Biozentrum der Uni Köln spart 500.000 Euro pro Jahr durch Contracting.htm25
Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com)Thank you for your attention 06.03.2018 Einsparcontracting: Das Beispiel der Universität Köln (oliver.diehl@de.engie.com) 26
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