1. Increasing total efficiency by combined district cooling and power with desalination in Middle East 
Wärtsilä Energy Solutions Hanna Alavillamo Upma Koul Marketing Manager Business Development Manager
Wärtsilä Finland Wärtsilä UAE

2. LEGAL DISCLAIMER
This document is provided for informational purposes only and may not be incorporated into any agreement. The information and conclusions in this document are based upon calculations (including software built-in assumptions), observations, assumptions, publicly available competitor information, and other information obtained by Wärtsilä or provided to Wärtsilä by its customers, prospective customers or other third parties (the ”information”) and is not intended to substitute independent evaluation. No representation or warranty of any kind is made in respect of any such information. Wärtsilä expressly disclaims any responsibility for, and does not guarantee, the correctness or the completeness of the information. The calculations and assumptions included in the information do not necessarily take into account all the factors that could be relevant. Nothing in this document shall be construed as a guarantee or warranty of the performance of any Wärtsilä equipment or installation or the savings or other benefits that could be achieved by using Wärtsilä technology, equipment or installations instead of any or other technology.
3 July 2009

3. Where I come from

4. COMBINED HEAT AND POWER

5. Here

6. COMBINED COOLING AND POWER
Add the installed capacity

7. Case description and assumptions
The Case
Alternative solutions
Fresh water by either RO or thermal desalination
In case of RO -> beach well
Heat for absorption chillers: Exhaust gas or steam (generated by waste heat of the engines)
A case study of a 100,000 m2 shopping mall in UAE
Electricity from 2xWärtsilä34SG (9,7 MW +38°C)
Cooling: Absorption chillers + electrical chiller stand-by
Fresh water requirement 11m3/h

8. Reverse Osmosis (RO)
Principle:
Sea water intake:

9. Thermal desalination
Multi-Stage flashing principle:

10. Absorption chiller
Principle:

11. Absorption chiller in ICE power plant
Principle when EG driven chiller:
12,6 MW
Ƞ ≈ 74 %
19,4 MW
Another option: Steam driven chiller, Ƞ ≈ 76 %

12. Desalination and district cooling in ICE power plant
CASE 1: RO, beach well
Basically two separate systems. Required electricity provided by the engines
Cooling: Cooling towers

13. Desalination and district cooling in ICE power plant
CASE 2: Thermal desalination
Several alternatives
Engine HT cooling water (44kg/s, 96°C)
10 stage MSF unit -> production 30 t/h
Multi effect evaporator -> 10.5 – 16.7 m3/h
Exhaust gas can be used to increase HT temperature -> increase production
Steam
Waste heat boiler
Steam to absorption chiller and MSF unit
Direct sea water intake, also sea water cooling

14. High overall efficiency Low emissions
Conclusions
The Benefits
The Challenge
Compact solution: Electricity, cooling and fresh water from one power plant
High overall efficiency
Low emissions
Many alternatives: Feasibility studies to be made
Investment costs critical
New combination of technologies

15. References Musandam IPP, Oman
Fuel: Gas
Prime movers: 15 X W20V34DF
Base load: 135 MW
Year of tender: 2014
Scope: EPC
Speciality: Sea water desalination, beach well & RO
Central Termica de Ressano Garcia (CTRG) MGEPP, Mozambique
Fuel: Gas
Prime movers: 18 X W20V34SG
Base load: 165 MW
Year of completion: 2014
Scope: EPC
Speciality: Dissolved Air Flotation (DAF) + Ultra Filtration (UF) + RO

16. References Makuhari, Japan Linate airport, Italy Fuel: Gas Fuel: Gas
Prime movers: 1 X W20V34SG
Base load: 16 MW
Year of completion: 2007
Scope: EEQ
Speciality: Trigeneration: Electricity, cooling, heating
Linate airport, Italy
Fuel: Gas
Prime movers: 3 X W20V34SG
Base load: 24 MW
Year of completion: 2008
Scope: EEQ
Speciality: Trigeneration: Electricity, cooling, heating

17. Three-in-one solution!
Come and discuss the concept!
Booth D14